@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&family=Noto+Sans+JP:wght@400;500;700&family=Noto+Serif+JP:wght@400;700&display=swap');

:root{
  --color-main: #18324a;
  --color-accent: #1f6feb;
  --color-accent-strong: #1859be;
  --color-accent-soft: #eaf1ff;
  --color-gold: #c5a25d;
  --bg-light: #eef2f6;
  --bg-panel: rgba(255,255,255,0.9);
  --bg-soft: #f8fafc;
  --text-strong: #162433;
  --text-muted: #5c6b7a;
  --text-soft: #7b8896;
  --incorrect: #dd6b20;
  --correct: #2f9e5d;
  --border-soft: rgba(15,23,42,0.08);
  --shadow-soft: 0 18px 40px rgba(15,23,42,0.08);
  --shadow-card: 0 10px 24px rgba(15,23,42,0.06);
  --max-width: 1260px;
}

html,body{height:100%;}
body{
  margin:0;
  background:
    radial-gradient(circle at top left, rgba(197,162,93,0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(31,111,235,0.10), transparent 25%),
    linear-gradient(180deg, #f7f9fc 0%, #eef2f6 100%);
  color:var(--text-strong);
  font-family:'Noto Sans JP','Inter',Arial,sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:'Inter','Noto Sans JP',sans-serif;margin:0;color:var(--text-strong)}
p{margin:0}

.container,.app-shell,.task-builder-shell{max-width:var(--max-width);margin:0 auto;padding:24px 18px 40px}

.box{
  background:var(--bg-panel);
  padding:20px;
  border:1px solid var(--border-soft);
  border-radius:22px;
  margin-bottom:16px;
  box-shadow:var(--shadow-soft);
}

.task-section-card .box{background:transparent;border:0;box-shadow:none;padding:0;margin:0}

.student-font{font-family:'Noto Serif JP',Georgia,'Times New Roman',serif;font-size:18px;line-height:1.7}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 14px;
  border-radius:12px;
  border:1px solid transparent;
  background:#edf2f7;
  color:var(--text-strong);
  cursor:pointer;
  font-weight:700;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 16px rgba(15,23,42,0.08)}
.btn-primary{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}
.btn-primary:hover{background:var(--color-accent-strong)}
.btn-start{background:var(--color-gold);color:#18324a;border-color:var(--color-gold)}
.btn-start:hover{background:#b0893f}
.btn-secondary{background:var(--color-main);color:#fff;border-color:var(--color-main)}
.btn-ghost{background:transparent;border-color:var(--border-soft);color:var(--text-strong)}
.btn-small{padding:8px 12px;font-size:13px;border-radius:10px}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none}
.btn:focus{outline:3px solid rgba(31,111,235,0.22);outline-offset:2px}

.skip-link{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus,.skip-link:active{position:static;width:auto;height:auto;padding:8px 12px;background:#000;color:#fff;z-index:10000}

.status-message{margin-top:8px;color:var(--text-muted);min-height:1.25em}
.small{font-size:13px;color:var(--text-soft)}

input,textarea,select,button{font:inherit}
input,textarea,select{
  width:100%;
  box-sizing:border-box;
  border:1px solid var(--border-soft);
  border-radius:14px;
  background:#fff;
  padding:12px 14px;
  color:var(--text-strong);
}
textarea{resize:vertical;min-height:120px}
input:focus,textarea:focus,select:focus,button:focus{outline:3px solid rgba(31,111,235,0.18);outline-offset:2px}
label{color:var(--text-muted);font-size:14px}
fieldset{border:1px solid var(--border-soft);border-radius:16px;padding:14px 16px;background:var(--bg-soft)}
legend{padding:0 8px;color:var(--text-strong);font-weight:700}

.app-topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  position:sticky;
  top:16px;
  z-index:1000;
  margin-bottom:18px;
  padding:18px 22px;
  background:rgba(255,255,255,0.82);
  border:1px solid rgba(255,255,255,0.75);
  border-radius:24px;
  box-shadow:var(--shadow-soft);
  backdrop-filter:blur(18px);
}

.app-topbar-main{display:flex;align-items:center;gap:18px;min-width:0}
.app-topbar-actions{display:flex;align-items:center;justify-content:flex-end;flex:1}

.app-brand-stack{display:flex;flex-direction:column;align-items:flex-start;gap:6px}
.app-brand{display:flex;align-items:center;gap:12px}
.app-brand-mark{
  width:42px;
  height:42px;
  border-radius:14px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg,var(--color-main),#31597e);
  color:#fff;
  font-weight:800;
  letter-spacing:.04em;
}
.app-brand-copy{display:flex;flex-direction:column;gap:2px}
.app-brand-copy strong{font-size:16px}
.app-brand-copy span{font-size:12px;color:var(--text-soft)}
.app-brand-teacher{display:flex;align-items:center;gap:8px;min-width:0;padding-left:54px}
.app-brand-teacher__label{font-size:11px;color:var(--text-soft);white-space:nowrap}
.app-brand-teacher__name{font-size:13px;line-height:1.2;color:var(--text-strong);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:220px}
.app-brand-teacher__meta{font-size:11px;color:var(--text-muted);white-space:nowrap}

.app-workspace-context{
  display:flex;
  flex-direction:column;
  gap:2px;
  min-width:0;
  padding-left:18px;
  border-left:1px solid rgba(15,23,42,0.08);
}
.app-workspace-context__heading{display:flex;align-items:center;gap:10px;flex-wrap:wrap;min-width:0}
.app-workspace-context__eyebrow{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-soft);font-weight:700}
.app-workspace-context__title{font-size:16px;color:var(--text-strong)}
.app-workspace-context__description{font-size:12px;color:var(--text-muted)}

.mode-tabs{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:flex-end}
.mode-tab-group{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.mode-tab-group-utility{padding-left:0;border-left:0;display:flex;gap:12px;align-items:center}
.mode-tab-group-utility .mode-tab:last-child{margin-left:20px}
.mode-tab-group-utility:empty{display:none}
.mode-tab{
  border:1px solid var(--border-soft);
  background:rgba(255,255,255,0.7);
  color:var(--text-muted);
  border-radius:999px;
  padding:10px 16px;
  font-weight:700;
  cursor:pointer;
}
.mode-tab.is-active{background:var(--color-main);color:#fff;border-color:var(--color-main)}
.mode-tab-utility{background:#f8fafc;color:var(--text-soft)}

.app-status{
  margin-bottom:18px;
  padding:12px 16px;
  border-radius:16px;
  background:var(--color-accent-soft);
  color:var(--color-main);
  border:1px solid rgba(31,111,235,0.12);
}

.task-page{display:flex;flex-direction:column;gap:18px}
.task-page-hero{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:24px;
  padding:28px;
  border-radius:30px;
  background:linear-gradient(135deg,#18324a 0%, #274867 72%, #355a7f 100%);
  color:#fff;
  box-shadow:0 20px 40px rgba(24,50,74,0.22);
}
.task-page-hero{margin-bottom:0}
.task-page-hero.compact{padding:22px 24px}
.task-page-hero h1,.task-page-hero h2{color:#fff;font-size:32px;margin-top:4px}
.eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,0.68);font-weight:700}
.lead{margin-top:8px;max-width:720px;color:rgba(255,255,255,0.82)}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}

.task-stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.task-stat-grid.compact{grid-template-columns:repeat(3,minmax(0,1fr))}
.task-stat-card{
  background:rgba(255,255,255,0.92);
  border:1px solid var(--border-soft);
  border-radius:22px;
  padding:18px 20px;
  box-shadow:var(--shadow-card);
  display:flex;
  flex-direction:column;
  gap:6px;
}
.task-stat-card__label{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-soft);font-weight:700}
.task-stat-card__value{font-size:30px;line-height:1;color:var(--color-main)}
.task-stat-card__note{font-size:13px;color:var(--text-muted)}

.task-focus-layout{display:grid;grid-template-columns:320px minmax(0,1fr);gap:18px;align-items:start}
.task-focus-side,.task-focus-main{display:grid;gap:18px}

.task-section-card{
  background:var(--bg-panel);
  border:1px solid var(--border-soft);
  border-radius:24px;
  padding:22px;
  box-shadow:var(--shadow-soft);
}

.task-section-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px}
.task-section-heading h2,.task-section-heading h3{margin-bottom:4px}

/* Add contextual icons to section headings and ensure subtitle stays below the title */
.task-section-heading > div{
  display:grid;
  grid-template-columns:40px 1fr;
  gap:12px;
  align-items:start;
}
.task-section-heading > div::before{
  content:'';
  display:block;
  width:40px;
  height:40px;
  border-radius:12px;
  background:var(--color-accent-soft);
  background-position:center;
  background-repeat:no-repeat;
  background-size:18px 18px;
  border:1px solid rgba(79,121,164,0.16);
  box-shadow:inset 0 1px 0 rgba(255,255,255,0.7);
  grid-column:1;
}
.task-section-heading > div > h2,
.task-section-heading > div > h3,
.task-section-heading > div > h4,
.task-section-heading > div > p{
  grid-column:2;
}
.task-section-heading > div > h2,.task-section-heading > div > h3,.task-section-heading > div > h4{margin:0;font-size:31px;line-height:1.15;color:var(--color-main)}
.task-section-heading > div > p{margin-top:1.5px}
.task-section-heading > div[data-title-icon='compose']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 20h9'/%3E%3Cpath d='M16.5 3.5a2.1 2.1 0 0 1 3 3L7 19l-4 1 1-4Z'/%3E%3C/svg%3E")}
.task-section-heading > div[data-title-icon='list']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9 6h11'/%3E%3Cpath d='M9 12h11'/%3E%3Cpath d='M9 18h11'/%3E%3Cpath d='M4 6h.01'/%3E%3Cpath d='M4 12h.01'/%3E%3Cpath d='M4 18h.01'/%3E%3C/svg%3E")}
.task-section-heading > div[data-title-icon='classroom']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M16 21v-2a4 4 0 0 0-4-4H6a4 4 0 0 0-4 4v2'/%3E%3Ccircle cx='9' cy='7' r='4'/%3E%3Cpath d='M22 21v-2a4 4 0 0 0-3-3.87'/%3E%3Cpath d='M16 3.13a4 4 0 0 1 0 7.75'/%3E%3C/svg%3E")}
.task-section-heading > div[data-title-icon='assign']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 7h13'/%3E%3Cpath d='m13 3 4 4-4 4'/%3E%3Cpath d='M21 17H8'/%3E%3Cpath d='m11 21-4-4 4-4'/%3E%3C/svg%3E")}
.task-section-heading > div[data-title-icon='filter']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 5h18l-7 8v5l-4 2v-7Z'/%3E%3C/svg%3E")}
.task-section-heading > div[data-title-icon='reports']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 20h18'/%3E%3Cpath d='M7 20v-5'/%3E%3Cpath d='M12 20V10'/%3E%3Cpath d='M17 20V4'/%3E%3C/svg%3E")}
.task-section-heading > div[data-title-icon='automation']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m12 3 1.9 4.7L18.5 9.5l-4.6 1.8L12 16l-1.9-4.7L5.5 9.5l4.6-1.8Z'/%3E%3Cpath d='m19 14 .9 2.1L22 17l-2.1.9L19 20l-.9-2.1L16 17l2.1-.9Z'/%3E%3C/svg%3E")}
.task-section-heading > div[data-title-icon='editor']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 20h9'/%3E%3Cpath d='M16.5 3.5a2.1 2.1 0 0 1 3 3L7 19l-4 1 1-4Z'/%3E%3C/svg%3E")}
.task-section-heading > div[data-title-icon='choices']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='3' width='18' height='18' rx='2'/%3E%3Cpath d='m9 12 2 2 4-4'/%3E%3C/svg%3E")}
.task-section-heading > div[data-title-icon='status']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M12 8h.01'/%3E%3Cpath d='M11 12h1v4h1'/%3E%3C/svg%3E")}
.section-note{font-size:13px;color:var(--text-muted)}

.task-inline-form,.task-inline-actions,.task-toggle-row,.task-card-controls,.task-card-footer{display:flex;gap:10px;flex-wrap:wrap}
.task-form-stack{display:grid;gap:12px}
.task-filter-bar{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(180px,.8fr) auto;gap:10px;margin-bottom:10px}
.task-results-meta{font-size:13px;color:var(--text-muted);margin-bottom:14px}

.teacher-test-toolbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  margin-bottom:14px;
}

.teacher-test-toolbar .task-results-meta{margin-bottom:0}

.teacher-test-view-switch{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
}

.teacher-test-view-switch .mode-tab{
  padding:8px 12px;
  font-size:13px;
}

.task-chip{
  display:inline-flex;
  align-items:center;
  min-height:36px;
  padding:0 12px;
  border-radius:999px;
  background:var(--color-accent-soft);
  color:var(--color-accent-strong);
  font-size:13px;
  font-weight:700;
}
.task-chip-muted{background:#f1f4f8;color:var(--text-muted)}

.task-toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 12px;
  border-radius:14px;
  border:1px solid var(--border-soft);
  background:var(--bg-soft);
  color:var(--text-strong);
}
.task-toggle.compact{padding:8px 10px;background:#fff}
.task-toggle input{width:auto;margin:0}

.task-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.task-list-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  padding:14px 16px;
  border-radius:18px;
  background:var(--bg-soft);
  border:1px solid var(--border-soft);
}
.task-list-row__body{display:flex;flex-direction:column;gap:2px}
.task-list-row__meta{font-size:12px;color:var(--text-soft)}
.task-list-row__actions{display:flex;gap:8px;flex-wrap:wrap}

.drop-zone-grid{display:grid;gap:10px}
.drop-zone{
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  min-height:72px;
  padding:14px 16px;
  border-radius:18px;
  border:1px dashed rgba(24,50,74,0.24);
  background:linear-gradient(180deg,#fcfdff,#f5f8fc);
  color:var(--text-muted);
}
.drop-zone strong{color:var(--text-strong)}

.task-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.teacher-test-grid-detailed{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.task-card{
  display:flex;
  flex-direction:column;
  gap:14px;
  padding:18px;
  border-radius:22px;
  background:linear-gradient(180deg,#ffffff,#f8fbfe);
  border:1px solid var(--border-soft);
  box-shadow:var(--shadow-card);
}
.task-card-header{display:flex;justify-content:space-between;align-items:flex-start;gap:14px}
.task-card-title{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:25px;
  margin-bottom:1px;
  font-weight:800;
  line-height:1.2;
  color:var(--color-main);
}
.task-card-title::before{
  content:'';
  width:14px;
  height:14px;
  flex:0 0 14px;
  background-repeat:no-repeat;
  background-position:center;
  background-size:14px 14px;
}
.task-card-title[data-title-icon='test']::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232c4a67' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M14 3H7a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V8Z'/%3E%3Cpath d='M14 3v5h5'/%3E%3Cpath d='M9 13h6'/%3E%3Cpath d='M9 17h4'/%3E%3C/svg%3E")}
.task-card-meta{font-size:13px;color:var(--text-muted)}
.task-badges{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.badge{
  display:inline-flex;
  align-items:center;
  padding:6px 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:700;
  background:#eff3f8;
  color:var(--text-muted);
}
.badge-success{background:#eaf8ef;color:#1b7a44}
.badge-accent{background:var(--color-accent-soft);color:var(--color-accent-strong)}
.badge-muted{background:#eff3f8;color:var(--text-muted)}
.task-empty{
  padding:18px;
  border-radius:18px;
  background:var(--bg-soft);
  border:1px dashed var(--border-soft);
  color:var(--text-muted);
}

.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.pagination{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:14px}

.choice-card{display:block;padding:12px;border-radius:14px;border:1px solid var(--border-soft);background:#fff;margin-bottom:8px;cursor:pointer}
.choice-card:hover{box-shadow:0 1px 0 rgba(0,0,0,0.04);border-color:var(--color-accent)}
.choice-card:focus{outline:3px solid rgba(31,111,235,0.18)}
.choice-card.selected{background:rgba(47,158,93,0.06);border-color:var(--correct)}
.choice-card.incorrect{background:rgba(221,107,32,0.06);border-color:var(--incorrect)}

#modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(9,16,26,0.56);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}
#modal-content{background:#fff;padding:20px;width:90%;max-width:900px;max-height:90%;overflow:auto;border-radius:20px;box-shadow:0 30px 60px rgba(15,23,42,0.18)}

/* Unsaved changes modal */
#unsaved-modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;z-index:1200}
#unsaved-modal::before{content:'';position:absolute;inset:0;background:rgba(9,16,26,0.5)}
.modal{position:fixed;inset:0;display:flex;align-items:flex-start;justify-content:center;z-index:1200;padding:20px}
.modal-backdrop{position:fixed;inset:0;background:rgba(9,16,26,0.56);z-index:1200}
.modal-panel{position:relative;background:#fff;border-radius:14px;padding:18px;max-width:520px;width:92%;box-shadow:0 24px 48px rgba(15,23,42,0.16);z-index:1201}
.modal-panel h3{margin:0 0 6px;font-size:18px}
.modal-panel p{color:var(--text-muted);margin:0}

.share-qr-modal{display:grid;gap:18px}
.share-qr-modal__meta{display:grid;gap:6px}
.share-qr-modal__grid{display:grid;grid-template-columns:minmax(220px,280px) minmax(0,1fr);gap:18px;align-items:start}
.share-qr-modal__code{
  display:grid;
  place-items:center;
  min-height:280px;
  padding:18px;
  border-radius:24px;
  background:linear-gradient(180deg,#fffef9,#f3f8f4);
  border:1px solid rgba(36,92,82,0.08);
}
.share-qr-modal__code img{display:block;width:100%;max-width:220px;height:auto}
.share-qr-modal__placeholder{color:var(--text-muted);text-align:center}
.share-qr-modal__details{display:grid;gap:12px}
.share-qr-modal__details input{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,"Roboto Mono","Noto Mono",monospace;font-size:13px}
.share-qr-modal__hint{font-size:13px;color:var(--text-muted)}
.share-qr-modal__error{font-size:13px;color:#b33;font-weight:700}
.share-qr-modal__actions{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}

.result-box{margin-top:10px;padding:10px;border:1px solid var(--border-soft);border-radius:14px}
.result-box.correct{border-left:4px solid var(--correct)}
.result-box.incorrect{border-left:4px solid var(--incorrect)}

.student-preview-shell{display:grid;gap:18px}
.student-preview-banner,
.student-summary-hero{
  position:relative;
  overflow:hidden;
  display:grid;
  gap:18px;
  padding:28px;
  border-radius:28px;
  color:#fff;
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.22), transparent 30%),
    radial-gradient(circle at bottom left, rgba(255,214,153,0.24), transparent 36%),
    linear-gradient(135deg, #1f5c57 0%, #2e7f78 45%, #8ec5a4 100%);
  box-shadow:0 26px 60px rgba(27,78,73,0.22);
}
.student-preview-banner{grid-template-columns:minmax(0,1fr)}
.student-summary-hero{grid-template-columns:minmax(0,1.25fr) 320px}

/* Make ghost buttons readable on dark/gradient hero backgrounds */
.student-summary-hero .btn-ghost,
.student-preview-banner .btn-ghost{
  color: #fff;
  border-color: rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.04);
}
.student-summary-hero .btn-ghost:hover,
.student-preview-banner .btn-ghost:hover{
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.26);
}
.student-preview-banner-loggedin{
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.18), transparent 28%),
    radial-gradient(circle at bottom left, rgba(255,221,166,0.22), transparent 34%),
    linear-gradient(135deg, #2b635a 0%, #4f8f7d 52%, #d0b46b 100%);
}
/* Contrast helper: ensure ghost buttons using this modifier are readable on any hero */
.student-summary-hero .btn-ghost.btn-ghost-contrast,
.student-preview-banner .btn-ghost.btn-ghost-contrast,
.student-preview-banner-loggedin .btn-ghost.btn-ghost-contrast{
  color: var(--text-strong) !important;
  border-color: var(--border-soft) !important;
  background: transparent !important;
}
.student-summary-hero .btn-ghost.btn-ghost-contrast:hover,
.student-preview-banner .btn-ghost.btn-ghost-contrast:hover,
.student-preview-banner-loggedin .btn-ghost.btn-ghost-contrast:hover{
  background: rgba(24,50,74,0.04) !important;
  border-color: rgba(24,50,74,0.08) !important;
}
.student-preview-banner__body,
.student-summary-hero__main{display:grid;gap:12px;align-content:start}
.student-preview-kicker{margin:0;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:rgba(255,255,255,0.72);font-weight:800}
.student-preview-kicker-muted{color:var(--text-soft)}
.student-preview-lead{color:rgba(255,255,255,0.82);max-width:680px}
.student-preview-banner h2,
.student-summary-hero h2{color:#fff;font-size:34px;line-height:1.15;overflow-wrap:anywhere}
.student-preview-lead{overflow-wrap:anywhere}
.student-preview-banner__stats,
.student-summary-stats{display:grid;gap:12px}
.student-preview-stat{
  display:grid;
  gap:6px;
  padding:18px 20px;
  border-radius:22px;
  background:rgba(255,255,255,0.14);
  border:1px solid rgba(255,255,255,0.2);
  backdrop-filter:blur(18px);
}
.student-summary-stats{grid-template-columns:repeat(3,minmax(0,1fr))}
.student-summary-stats .student-preview-stat{
  background:linear-gradient(180deg,#fffef9,#f6fbf8);
  border:1px solid rgba(36,92,82,0.08);
  box-shadow:var(--shadow-card);
}
.student-summary-stats .student-preview-stat__label{color:var(--text-soft)}
.student-summary-stats .student-preview-stat__value{color:var(--color-main)}
.student-summary-stats .student-preview-stat__note{color:var(--text-muted)}
.student-preview-stat__label{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,0.7);font-weight:800}
.student-preview-stat__value{font-size:28px;line-height:1.1;color:#fff}
.student-preview-stat__note{font-size:13px;color:rgba(255,255,255,0.82)}

.student-preview-grid{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:18px;align-items:start}
.student-preview-panel{
  display:grid;
  gap:16px;
  padding:22px;
  border-radius:24px;
  background:linear-gradient(180deg,#fffef9,#f6fbf8);
  border:1px solid rgba(36,92,82,0.08);
  box-shadow:var(--shadow-soft);
}
.student-preview-panel-spotlight{
  background:
    radial-gradient(circle at top right, rgba(116,182,164,0.14), transparent 26%),
    radial-gradient(circle at bottom left, rgba(255,220,170,0.18), transparent 30%),
    linear-gradient(180deg,#fffef9,#eef8f1);
}
.student-preview-panel__header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}
.student-preview-panel__header h3{font-size:24px;color:var(--color-main)}
.student-preview-caption{font-size:12px;color:var(--text-soft);font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.student-preview-form-grid{display:grid;gap:12px}
.student-field-label{display:block;margin-bottom:8px;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-soft);font-weight:800}
.student-preview-inline-note{
  display:grid;
  gap:4px;
  padding:14px 16px;
  border-radius:18px;
  background:#edf8f2;
  border:1px solid rgba(47,158,93,0.16);
  color:#20483f;
}
.student-preview-inline-note.is-strong{
  background:linear-gradient(180deg,#f9f3df,#f4fbf6);
  border-color:rgba(197,162,93,0.22);
}

.student-empty-state{
  display:grid;
  gap:6px;
  padding:18px;
  border-radius:20px;
  border:1px dashed rgba(43,99,90,0.18);
  background:linear-gradient(180deg,#fffef8,#f3f8f2);
  color:var(--text-muted);
}
.student-empty-state strong{color:var(--text-strong)}

.student-test-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.student-test-card{
  display:grid;
  gap:14px;
  padding:18px;
  border-radius:22px;
  background:
    radial-gradient(circle at top right, rgba(116,182,164,0.14), transparent 26%),
    radial-gradient(circle at bottom left, rgba(255,220,170,0.16), transparent 28%),
    linear-gradient(180deg,#fffef9,#f7fbf8);
  border:1px solid rgba(36,92,82,0.08);
  box-shadow:var(--shadow-card);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.student-test-card:hover{transform:translateY(-2px);box-shadow:0 18px 28px rgba(36,92,82,0.12);border-color:rgba(79,143,125,0.22)}
.student-test-card.is-disabled{opacity:.82}
.student-test-card h3{font-size:22px;color:var(--color-main)}
.student-test-card__top,.student-test-card__footer{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.student-test-card__footer-centered{flex-direction:column;justify-content:center;align-items:center;text-align:center}
.student-test-card__meta{color:var(--text-muted);font-size:14px}
.student-test-card__helper{font-size:13px;color:var(--text-soft)}

.student-pill{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  padding:0 10px;
  border-radius:999px;
  background:rgba(61,133,118,0.12);
  color:#245c52;
  font-size:12px;
  font-weight:800;
}
.student-pill-muted{background:#f1f4f8;color:var(--text-muted)}
.student-pill-soft{background:#f8eed7;color:#83621a}

.student-summary-hero{grid-template-columns:minmax(0,1fr) 220px;align-items:center}
.student-score-orb{
  width:220px;
  height:220px;
  margin-left:auto;
  border-radius:50%;
  display:grid;
  place-items:center;
  background:conic-gradient(#ffd17a 0 var(--score-angle), rgba(255,255,255,0.2) var(--score-angle) 100%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,0.12), 0 20px 36px rgba(34,90,82,0.18);
}
.student-score-orb__inner{
  width:164px;
  height:164px;
  border-radius:50%;
  display:grid;
  place-items:center;
  align-content:center;
  gap:4px;
  background:rgba(22,58,54,0.9);
  text-align:center;
}
.student-score-orb__eyebrow{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:rgba(255,255,255,0.56);font-weight:800}
.student-score-orb__value{font-size:44px;line-height:1;color:#fff}
.student-score-orb__sub{font-size:14px;color:rgba(255,255,255,0.78)}

.student-summary-list{display:grid;gap:14px}
.student-summary-card{
  display:grid;
  gap:14px;
  padding:18px;
  border-radius:22px;
  border:1px solid rgba(36,92,82,0.08);
  background:#fff;
  box-shadow:var(--shadow-card);
}
.student-summary-card.is-correct{border-color:rgba(47,158,93,0.18);background:linear-gradient(180deg,#fdfef8,#f1fbf3)}
.student-summary-card.is-incorrect{border-color:rgba(221,107,32,0.16);background:linear-gradient(180deg,#fffef9,#fff6ef)}
.student-summary-card__header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.student-summary-card__header h4{margin-top:6px;font-size:20px;color:var(--text-strong)}
.student-summary-card__index{display:inline-flex;align-items:center;justify-content:center;min-width:42px;height:26px;padding:0 10px;border-radius:999px;background:#edf8f2;color:#245c52;font-size:12px;font-weight:800}
.student-summary-card__meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--text-muted);font-size:14px}
.student-summary-card__rows{display:grid;gap:10px}
.student-summary-row{display:grid;gap:4px;padding:12px 14px;border-radius:16px;background:#f7fbf8;border:1px solid rgba(36,92,82,0.06)}
.student-summary-row-note{background:#fff9ee}
.student-summary-row__label{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-soft);font-weight:800}

.student-status-pill{
  display:inline-flex;
  align-items:center;
  min-height:32px;
  padding:0 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:800;
  letter-spacing:.08em;
  text-transform:uppercase;
}
.student-status-pill.is-neutral{background:#edf8f2;color:#245c52}
.student-status-pill.is-correct{background:#eaf8ef;color:#1f7d46}
.student-status-pill.is-incorrect{background:#fff0e7;color:#b55b17}

.student-exam-shell,.student-exam-main{display:grid;gap:18px;width:100%;min-width:0}
.student-exam-shell{grid-template-columns:minmax(0,1fr)}
.student-exam-panel,
.student-question-card,
.student-feedback-card{
  display:grid;
  gap:16px;
  padding:20px;
  border-radius:24px;
  background:linear-gradient(180deg,#fffef9,#f6fbf8);
  border:1px solid rgba(36,92,82,0.08);
  box-shadow:var(--shadow-soft);
}
.student-exam-panel-emphasis{
  background:
    radial-gradient(circle at top right, rgba(255,230,175,0.18), transparent 28%),
    radial-gradient(circle at bottom left, rgba(255,255,255,0.12), transparent 24%),
    linear-gradient(180deg,#245c52,#3f7f72);
  color:#fff;
}
.student-exam-panel-emphasis h3{color:#fff;font-size:26px}
.student-exam-panel-emphasis .student-preview-kicker-muted{color:rgba(255,255,255,0.66)}
.student-exam-panel__lead{color:rgba(255,255,255,0.78)}
.student-exam-panel__meta{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:rgba(255,255,255,0.78);font-size:13px}
.student-exam-progress-panel{background:linear-gradient(180deg,#fffef9,#f6fbf8)}
.student-exam-progress-panel__header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap}
.student-exam-progress-panel__header h3{font-size:24px;color:var(--color-main)}
.student-exam-progress-panel__lead{color:var(--text-muted)}
.student-exam-progress-panel .student-exam-panel__meta{color:var(--text-muted)}
.student-exam-progress-bar,
.student-exam-progress-bar span{display:block;border-radius:999px}
.student-exam-progress-bar{height:10px;background:rgba(36,92,82,0.1);overflow:hidden}
.student-exam-progress-bar span{height:100%;background:linear-gradient(90deg,#3f7f72,#74a6d9)}

.student-question-track{display:grid;gap:10px}
.student-question-track__item{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  padding:12px 14px;
  border-radius:18px;
  background:#f7fbf8;
  border:1px solid rgba(36,92,82,0.06);
}
.student-question-track__item.is-active{background:#eef8f2;border-color:rgba(79,143,125,0.22)}
.student-question-track__item.is-done{background:#edf8f3;border-color:rgba(47,158,93,0.16)}
.student-question-track__index{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,"Roboto Mono","Noto Mono",monospace;font-size:13px;color:var(--text-soft)}
.student-question-track__label{font-weight:700;color:var(--text-strong)}

.student-exam-topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap}
.student-exam-topbar h2{font-size:30px;color:var(--color-main)}
.student-question-card__header{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.student-question-card__type-label{
  display:inline-block;
  padding:6px 10px;
  border-radius:10px;
  background:rgba(24,50,74,0.06);
  color:var(--text-strong);
  font-weight:700;
  font-size:13px;
  margin-right:8px;
}
.student-question-card h3{font-size:30px;line-height:1.35;color:var(--text-strong)}
.student-question-card__count{font-size:13px;color:var(--text-soft);font-weight:700}
.student-question-card__hint{color:var(--text-muted)}

.student-choice-list{display:grid;gap:12px}
.student-choice-option{
  position:relative;
  display:grid;
  grid-template-columns:22px 1fr;
  gap:14px;
  align-items:start;
  padding:16px 18px;
  border-radius:20px;
  border:1px solid rgba(36,92,82,0.08);
  background:#fff;
  cursor:pointer;
  transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease, background .16s ease;
}
.student-choice-option:hover{transform:translateY(-1px);box-shadow:0 14px 24px rgba(36,92,82,0.08);border-color:rgba(79,143,125,0.2)}
.student-choice-option input{position:absolute;opacity:0;pointer-events:none;width:1px;height:1px}
.student-choice-option__marker{
  width:22px;
  height:22px;
  border-radius:50%;
  border:2px solid rgba(36,92,82,0.24);
  background:#fff;
  box-sizing:border-box;
  margin-top:2px;
}
.student-choice-option__text{font-size:17px;line-height:1.7;color:var(--text-strong)}
.student-choice-option.is-selected{background:#eff8f3;border-color:rgba(79,143,125,0.24)}
.student-choice-option.is-selected .student-choice-option__marker{border-color:#3f7f72;box-shadow:inset 0 0 0 5px rgba(218,243,229,0.9);background:#3f7f72}
.student-choice-option.is-correct{background:#f1fbf5;border-color:rgba(47,158,93,0.24)}
.student-choice-option.is-correct .student-choice-option__marker{border-color:var(--correct);background:var(--correct);box-shadow:inset 0 0 0 5px rgba(255,255,255,0.8)}
.student-choice-option.is-incorrect{background:#fff5ef;border-color:rgba(221,107,32,0.26)}
.student-choice-option.is-incorrect .student-choice-option__marker{border-color:var(--incorrect);background:var(--incorrect);box-shadow:inset 0 0 0 5px rgba(255,255,255,0.82)}
.student-choice-option.is-locked{cursor:default}
.student-choice-option.is-locked:hover{transform:none;box-shadow:none}

.student-feedback-card.is-correct{background:linear-gradient(180deg,#fffef8,#eefaf2);border-color:rgba(47,158,93,0.18)}
.student-feedback-card.is-incorrect{background:linear-gradient(180deg,#fffef8,#fff3ea);border-color:rgba(221,107,32,0.18)}
.student-feedback-card__header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}
.student-feedback-card__body{display:grid;gap:10px}
.student-exam-actions{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:12px;flex-wrap:wrap;text-align:center}
.student-action-hint{font-size:13px;color:var(--text-muted)}

.student-summary-hero__actions{justify-content:center}

/* utility: push element to the right inside .student-exam-actions */
.student-exam-actions .align-right{margin-left:auto}

/* Review button: centered and distinct color */
.btn-review{
  background:var(--color-main);
  color:#fff;
  border-color:var(--color-main);
}
.btn-review:hover{background:var(--color-accent-strong)}
.btn-center{margin:0 auto}

/* Under-explanation placement: center the actions below the explanation card and add gap */
.student-exam-actions--under-explanation{
  display:flex;
  justify-content:center;
  width:100%;
  margin-top:18px; /* space between card and button */
}

/* Prominent selection-type label shown in exam topbar */
.student-exam-topbar .student-preview-kicker,
.student-exam-topbar .student-preview-kicker-muted{
  font-size:14px; /* slightly larger */
  color:var(--color-main);
  font-weight:800;
  letter-spacing:0.08em;
  text-transform:none;
}

/* Pill-style label for selection type in exam topbar */
.student-exam-topbar .student-preview-kicker,
.student-exam-topbar .student-preview-kicker-muted{
  background:var(--color-accent-soft);
  padding:6px 12px;
  border-radius:999px;
  color:var(--color-accent-strong);
  display:inline-block;
  font-weight:800;
  letter-spacing:0.06em;
  font-size:14px;
}

.student-preview-banner,
.student-summary-hero,
.student-preview-panel,
.student-summary-stats,
.student-exam-panel,
.student-question-card,
.student-feedback-card,
.student-summary-card{animation:student-fade-up .45s ease both}

@keyframes student-fade-up{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}

.report-filter-analytics{
  margin-top:18px;
  padding-top:18px;
  border-top:1px solid rgba(15,23,42,0.08);
  display:grid;
  gap:14px;
}
.report-filter-analytics--loading{color:var(--text-muted)}
.report-filter-analytics__header{
  display:flex;
  justify-content:space-between;
  gap:12px;
  align-items:center;
  flex-wrap:wrap;
}
.report-filter-analytics__note{
  padding:8px 10px;
  border-radius:12px;
  background:#f7f9fc;
  border:1px solid var(--border-soft);
}
.report-filter-analytics__grid{
  display:grid;
  grid-template-columns:minmax(220px,280px) minmax(0,1fr);
  gap:16px;
}
.report-chart-card{
  background:linear-gradient(180deg,#fcfdff,#f7fafc);
  border:1px solid var(--border-soft);
  border-radius:20px;
  padding:18px;
  display:grid;
  gap:14px;
}
.report-chart-card--bars{align-content:start}
.report-chart-card__title{font-size:14px;font-weight:700;color:var(--color-main)}
.report-donut-chart{
  width:168px;
  height:168px;
  margin:0 auto;
  border-radius:50%;
  display:grid;
  place-items:center;
}
.report-donut-chart__center{
  width:108px;
  height:108px;
  border-radius:50%;
  background:#fff;
  box-shadow:inset 0 0 0 1px rgba(15,23,42,0.05);
  display:grid;
  place-items:center;
  text-align:center;
}
.report-donut-chart__center strong{display:block;font-size:28px;line-height:1;color:var(--color-main)}
.report-donut-chart__center span{font-size:12px;color:var(--text-soft);margin-top:4px}
.report-bars{display:grid;gap:12px}
.report-bars__row{display:grid;gap:6px}
.report-bars__meta{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  gap:10px;
  align-items:center;
}
.report-bars__label{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:38px;
  padding:4px 8px;
  border-radius:999px;
  background:var(--color-accent-soft);
  color:var(--color-accent-strong);
  font-size:12px;
  font-weight:700;
}
.report-bars__text{
  min-width:0;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  color:var(--text-strong);
  font-size:13px;
}
.report-bars__value{font-size:13px;font-weight:700;color:var(--color-main)}
.report-bars__track{
  width:100%;
  height:12px;
  border-radius:999px;
  background:#e4ebf3;
  overflow:hidden;
}
.report-bars__fill{
  height:100%;
  border-radius:999px;
  background:linear-gradient(90deg,var(--color-accent),#6fb0ff);
}

.reports-layout{display:flex;gap:20px;align-items:flex-start}
.reports-main{flex:1}
.reports-side{display:none}
.reports-table{width:100%;border-collapse:separate;border-spacing:0;background:transparent;border-radius:16px;overflow:hidden;box-shadow:none}
.reports-table thead th{background:linear-gradient(180deg,#fbfdff,#f4f8ff);color:#254063;font-weight:700;font-size:13px;padding:14px 16px;text-align:left;border-bottom:1px solid rgba(37,64,99,0.08)}
.reports-table tbody td{background:#fff;padding:14px 16px;border-bottom:1px solid rgba(16,30,60,0.04);vertical-align:middle;font-size:14px;color:#122}
.reports-table tbody tr:hover td{background:linear-gradient(90deg,rgba(245,249,255,0.85),#ffffff)}
.reports-table .testName{font-weight:600;color:#0f1724}
.reports-table .mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,"Roboto Mono","Noto Mono",monospace}
.reports-table .score{display:inline-block;padding:6px 10px;border-radius:999px;font-weight:700;font-size:13px;background:#eef6ff;color:#1f5fa8}
.reports-table .score.low{background:#fff0f0;color:#b33}
.reports-table .score.high{background:#eafaf0;color:#157a3b}

.task-builder-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  margin-bottom:18px;
  padding:18px 22px;
  border-radius:24px;
  background:rgba(255,255,255,0.82);
  border:1px solid rgba(255,255,255,0.75);
  box-shadow:var(--shadow-soft);
}
.task-builder-header__actions{display:flex;gap:10px;flex-wrap:wrap}
.task-builder-grid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:18px;align-items:start}
.task-builder-main,.task-builder-side{display:grid;gap:18px}
.task-warning{background:#fff8e1;border:1px solid rgba(240,192,64,0.35);border-left:4px solid #f0c040;padding:10px 12px;border-radius:14px;font-size:13px;color:#7a5b0a}
.task-helper-text{font-size:13px;color:var(--text-muted)}

.builder-editor-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 16px;border-radius:18px;background:linear-gradient(180deg,#f9fbff,#f4f8fd);border:1px solid var(--border-soft)}
.builder-editor-toolbar__stats,.builder-editor-toolbar__actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.builder-shortcuts{display:flex;gap:10px;flex-wrap:wrap;align-items:center;color:var(--text-soft);font-size:12px}
.builder-shortcuts span{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:#f7fafc;border:1px solid var(--border-soft)}
kbd{display:inline-flex;align-items:center;justify-content:center;min-width:22px;height:22px;padding:0 6px;border-radius:8px;background:#fff;border:1px solid rgba(15,23,42,0.14);box-shadow:0 1px 0 rgba(15,23,42,0.08);font-size:12px;font-family:'Inter','Noto Sans JP',sans-serif;color:var(--text-strong)}

#questions-list ol{margin:0;padding-left:22px;display:grid;gap:12px}
#questions-list li{padding:14px;border-radius:16px;background:var(--bg-soft);border:1px solid var(--border-soft)}
#questions-list li > div + div{margin-top:6px}
#choices-list{display:grid;gap:10px}
#choices-list > div{display:grid;grid-template-columns:44px minmax(0,1fr) auto auto;align-items:center;gap:10px;padding:10px 12px;border-radius:14px;background:var(--bg-soft);border:1px solid var(--border-soft)}
.choice-editor-row__index{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:12px;background:#edf3fb;color:var(--color-main);font-weight:800}
.choice-editor-input{flex:1 1 240px}
.question-list-card__title{font-weight:700;color:var(--text-strong);line-height:1.5}

@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}

@media (max-width:960px){
  .task-focus-layout,.task-builder-grid,.student-preview-grid,.student-exam-shell,.student-summary-hero{grid-template-columns:1fr}
  .task-stat-grid,.task-stat-grid.compact{grid-template-columns:repeat(2,minmax(0,1fr))}
  .report-filter-analytics__grid{grid-template-columns:1fr}
  .app-topbar,.task-page-hero,.task-builder-header{flex-direction:column;align-items:flex-start}
  .app-topbar-main,.app-topbar-actions{width:100%}
  .app-topbar-main{flex-direction:column;align-items:flex-start}
  .app-brand-stack{width:100%}
  .app-brand-teacher{padding-left:0}
  .app-workspace-context{padding-left:0;border-left:0;padding-top:4px}
  .app-workspace-context__heading{width:100%}
  .app-brand-teacher__name{max-width:100%}
  .mode-tabs{justify-content:flex-start}
  .mode-tab-group-utility{padding-left:0;border-left:0}
  .student-preview-banner,.student-summary-hero{padding:24px}
  .student-preview-banner__stats,.student-summary-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .student-score-orb{margin:0 auto}
}

@media (max-width:640px){
  .container,.app-shell,.task-builder-shell{padding:14px 12px 28px}
  .app-topbar{top:12px}
  .task-stat-grid,.task-stat-grid.compact{grid-template-columns:1fr}
  .controls{grid-template-columns:1fr}
  .task-filter-bar{grid-template-columns:1fr}
  .pagination{flex-direction:column;align-items:flex-start}
  .task-page-hero h1{font-size:28px}
  .builder-editor-toolbar{align-items:flex-start}
  #choices-list > div{grid-template-columns:36px minmax(0,1fr);align-items:start}
  #choices-list .task-toggle{grid-column:1 / -1;justify-self:start}
  #choices-list .btn{grid-column:1 / -1;justify-self:start}
  .share-qr-modal__grid{grid-template-columns:1fr}
  .student-preview-banner h2,.student-summary-hero h2,.student-question-card h3{font-size:26px}
  .student-preview-banner__stats,.student-summary-stats,.student-test-grid{grid-template-columns:1fr}
  .student-preview-panel,.student-exam-panel,.student-question-card,.student-feedback-card,.student-summary-card{padding:18px}
  .student-summary-card__header,.student-feedback-card__header{flex-direction:column;align-items:flex-start}
  .student-exam-actions{align-items:center}
  .student-choice-option{grid-template-columns:20px 1fr;padding:14px}
  .student-score-orb{width:180px;height:180px}
  .student-score-orb__inner{width:132px;height:132px}
  .student-score-orb__value{font-size:34px}
}

/* 2026 school UI reset */
:root{
  --color-main:#2c4a67;
  --color-accent:#4f79a4;
  --color-accent-strong:#3e648a;
  --color-accent-soft:#eef3f8;
  --bg-light:#f3f5f7;
  --bg-panel:#ffffff;
  --bg-soft:#f7f9fb;
  --text-strong:#1f2f3d;
  --text-muted:#566779;
  --text-soft:#738496;
  --incorrect:#c87a31;
  --correct:#4d7c63;
  --border-soft:#d6dde5;
  --shadow-soft:0 1px 2px rgba(31,47,61,0.08);
  --shadow-card:0 1px 2px rgba(31,47,61,0.06);
  --max-width:1248px;
}

body{
  background:var(--bg-light);
  color:var(--text-strong);
  font-family:'Noto Sans JP','Segoe UI',sans-serif;
}

h1,h2,h3,h4{
  font-family:'Noto Sans JP','Segoe UI',sans-serif;
  font-weight:700;
  letter-spacing:0.01em;
}

.container,.app-shell,.task-builder-shell{padding:20px 20px 32px}

.box,
.task-section-card,
.task-stat-card,
.task-card,
.student-preview-panel,
.student-preview-stat,
.student-summary-card,
.student-exam-panel,
.student-question-card,
.student-feedback-card,
.modal-panel,
#modal-content,
.share-qr-modal__code,
.drop-zone,
#questions-list li,
#choices-list > div,
.builder-editor-toolbar,
.task-warning,
.task-empty,
.student-empty-state,
.student-summary-row,
.task-list-row,
.student-test-card{
  border-radius:6px;
  box-shadow:var(--shadow-soft);
}

.btn,
.mode-tab,
.task-toggle,
.task-chip,
.badge,
.student-pill,
.student-status-pill,
.student-summary-card__index,
.choice-card,
input,
textarea,
select,
fieldset,
.student-choice-option,
.student-question-track__item,
.result-box{
  border-radius:6px;
}

.btn{
  min-height:36px;
  padding:6px 12px;
  background:#f1f4f7;
  border:1px solid var(--border-soft);
  color:var(--text-strong);
  font-weight:700;
  box-shadow:none;
}

.btn-small{
  min-height:32px;
  padding:4px 10px;
}

.btn:hover{
  transform:none;
  box-shadow:none;
  background:#e9eef3;
}

.btn-primary{
  background:var(--color-main);
  border-color:var(--color-main);
  color:#fff;
}

.btn-primary:hover{background:#243d56}

.btn-secondary{
  background:var(--color-accent);
  border-color:var(--color-accent);
  color:#fff;
}

.btn-secondary:hover{background:var(--color-accent-strong)}

.btn-ghost{
  background:#fff;
  border-color:var(--border-soft);
  color:var(--color-main);
}

input,textarea,select{
  padding:10px 12px;
  border:1px solid var(--border-soft);
  background:#fff;
}

textarea{min-height:112px}

label{font-size:13px;color:var(--text-muted);font-weight:500}

.app-topbar,
.task-builder-header{
  padding:14px 18px;
  background:#fff;
  border:1px solid var(--border-soft);
  border-radius:6px;
  box-shadow:var(--shadow-soft);
  backdrop-filter:none;
}

.app-brand-mark{
  width:40px;
  height:40px;
  border-radius:6px;
  background:var(--color-main);
}

.app-brand-copy span,
.app-workspace-context__description,
.app-workspace-context__eyebrow,
.section-note,
.task-results-meta,
.task-card-meta,
.task-list-row__meta,
.student-test-card__helper,
.student-test-card__meta,
.student-question-card__hint,
.student-action-hint,
.small{
  color:var(--text-muted);
}

.mode-tab{
  background:#fff;
  color:var(--color-main);
  border:1px solid var(--border-soft);
  padding:8px 14px;
}

.mode-tab.is-active{
  background:var(--color-main);
  color:#fff;
  border-color:var(--color-main);
}

.app-status,
.teacher-status-strip,
.student-status-strip{
  margin-bottom:16px;
  padding:10px 14px;
  border:1px solid #cfd8e3;
  border-left:4px solid var(--color-accent);
  border-radius:6px;
  background:#fff;
  color:var(--text-strong);
}

.task-page-hero,
.teacher-page-hero,
.student-preview-banner,
.student-summary-hero,
.student-exam-panel-emphasis{
  padding:18px 20px;
  border-radius:6px;
  border:1px solid var(--border-soft);
  border-left:4px solid var(--color-main);
  background:#fff;
  color:var(--text-strong);
  box-shadow:var(--shadow-soft);
}

.task-page-hero h1,
.task-page-hero h2,
.student-preview-banner h2,
.student-summary-hero h2,
.student-exam-panel-emphasis h3,
.student-exam-topbar h2,
.student-question-card h3{
  color:var(--text-strong);
}

.eyebrow,
.student-preview-kicker,
.student-preview-kicker-muted,
.student-preview-stat__label,
.student-field-label,
.student-summary-row__label,
.task-stat-card__label,
.app-workspace-context__eyebrow,
.task-card-meta{
  color:var(--text-soft);
}

.lead,
.student-preview-lead,
.student-exam-panel__lead,
.student-exam-panel__meta,
.student-preview-stat__note{
  color:var(--text-muted);
}

.task-stat-grid,
.task-stat-grid.compact{gap:12px}

.task-stat-card{
  padding:12px 14px;
  background:#fff;
  border:1px solid var(--border-soft);
}

.task-stat-card__value{font-size:28px;color:var(--color-main)}

.teacher-workspace-grid{
  display:grid;
  grid-template-columns:minmax(0,1.16fr) minmax(340px,0.98fr);
  gap:18px;
  align-items:start;
}

.teacher-class-card,
.teacher-create-card{
  display:grid;
  gap:14px;
  align-content:start;
}

.teacher-class-card .task-section-heading,
.teacher-create-card .task-section-heading{
  margin-bottom:0;
}

.teacher-class-card__top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(220px,0.44fr);
  gap:12px;
  align-items:stretch;
}

.teacher-class-card__top.teacher-class-card__top--single{
  grid-template-columns:1fr;
}

.teacher-class-card__form{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:10px;
  align-items:flex-start;
}

.teacher-class-card__form input{
  width:100%;
  min-width:0;
}

.teacher-class-card__summary{
  display:grid;
  gap:4px;
  align-content:center;
  padding:14px 16px;
  border-radius:18px;
  border:1px solid var(--border-soft);
  background:linear-gradient(180deg,#f9fbff,#edf3f9);
}

.teacher-class-card__summary-label{
  font-size:12px;
  font-weight:700;
  color:var(--text-soft);
  letter-spacing:.04em;
}

.teacher-class-card__summary-value{
  font-size:30px;
  line-height:1;
  color:var(--color-main);
}

.teacher-class-card__summary-note{
  font-size:12px;
  line-height:1.5;
  color:var(--text-muted);
}

.teacher-class-card .task-list{
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
}

.teacher-class-card .task-empty{
  min-height:86px;
  display:flex;
  align-items:center;
}

.teacher-create-card .task-section-heading{
  flex-wrap:wrap;
}

.teacher-create-card .task-section-heading .task-chip{
  margin-left:auto;
  white-space:nowrap;
}

.teacher-workspace-main .task-section-card .task-section-heading .task-chip{
  font-size:12px;
  white-space:nowrap;
  padding:0 10px;
}

.teacher-create-card .task-form-stack{
  gap:14px;
}

.teacher-create-card .task-toggle-row{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
}

.teacher-create-card .task-toggle{
  width:auto;
  margin:0;
  flex: 0 1 auto;
  min-width:0;
}

.teacher-create-card .task-inline-actions{
  align-items:center;
}

.teacher-workspace-main,
.teacher-workspace-side,
.student-preview-shell,
.student-exam-sidebar,
.student-exam-main{display:grid;gap:18px}

.teacher-page-hero{
  display:grid;
  grid-template-columns:minmax(260px,0.7fr) minmax(0,1.3fr);
  gap:16px;
  align-items:center;
}

.teacher-page-hero__intro{display:grid;gap:8px;align-content:start}

.teacher-page-flow{
  display:grid;
  gap:10px;
  min-width:0;
}

.teacher-page-flow__header{
  display:flex;
  justify-content:flex-start;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
}

.teacher-page-flow__kicker{
  display:inline-flex;
  align-items:center;
  min-height:28px;
  padding:0 10px;
  border-radius:999px;
  border:1px solid var(--border-soft);
  background:#f5f7fa;
  color:var(--text-soft);
  font-size:11px;
  font-weight:800;
  letter-spacing:.12em;
  text-transform:uppercase;
}

.teacher-page-flow__lane{
  min-width:0;
  overflow:visible;
}

.teacher-page-flow__list{
  list-style:none;
  display:grid;
  grid-template-columns:minmax(0,0.9fr) minmax(0,0.92fr) minmax(0,1.18fr);
  gap:12px;
  min-width:0;
  margin:0;
  padding:0;
}

.teacher-page-flow__step{
  position:relative;
  display:grid;
  gap:10px;
  min-height:126px;
  padding:13px 14px;
  border-radius:16px;
  border:1px solid rgba(24,50,74,0.18);
  background:linear-gradient(180deg,#ffffff,#f2f6fb);
  box-shadow:0 8px 18px rgba(15,23,42,0.06);
}

.teacher-page-flow__step:not(:last-child)::before{
  content:'';
  position:absolute;
  top:50%;
  right:-13px;
  width:18px;
  height:3px;
  border-radius:999px;
  background:linear-gradient(90deg,#274867,#4d7396);
  transform:translateY(-50%);
}

.teacher-page-flow__step:not(:last-child)::after{
  content:'';
  position:absolute;
  top:50%;
  right:-13px;
  width:10px;
  height:10px;
  border-top:3px solid #335779;
  border-right:3px solid #335779;
  transform:translateY(-50%) rotate(45deg);
}

.teacher-page-flow__step.is-detailed{
  background:linear-gradient(180deg,#ffffff,#eaf2fb);
  border-color:rgba(31,111,235,0.24);
}

.teacher-page-flow__step-top{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:12px;
  align-items:start;
}

.teacher-page-flow__step-index{
  display:grid;
  place-items:center;
  min-width:38px;
  height:38px;
  border-radius:12px;
  background:linear-gradient(180deg,#18324a,#31597e);
  color:#fff;
  font-size:15px;
  font-weight:800;
  line-height:1;
  box-shadow:inset 0 1px 0 rgba(255,255,255,0.18);
}

.teacher-page-flow__step-copy{display:grid;gap:4px}

.teacher-page-flow__step-title{
  font-size:15px;
  line-height:1.3;
  color:var(--color-main);
}

.teacher-page-flow__step-summary{
  font-size:12px;
  line-height:1.45;
  color:var(--text-muted);
}

.teacher-page-flow__sublist{
  list-style:none;
  display:grid;
  gap:8px;
  margin:0;
  padding:0;
}

.teacher-page-flow__subitem{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:8px;
  align-items:start;
}

.teacher-page-flow__subitem + .teacher-page-flow__subitem{
  padding-top:8px;
  border-top:1px solid rgba(15,23,42,0.12);
}

.teacher-page-flow__subindex{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:38px;
  min-height:22px;
  padding:0 6px;
  border-radius:999px;
  background:#dfeaf8;
  color:#184f93;
  font-size:11px;
  font-weight:800;
  letter-spacing:.04em;
}

.teacher-page-flow__subtext{
  font-size:12px;
  line-height:1.45;
  color:var(--text-strong);
}

.teacher-step-list{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:8px;
  margin-bottom:12px;
}

.teacher-step-item{
  display:grid;
  gap:4px;
  padding:10px;
  border:1px solid var(--border-soft);
  border-radius:6px;
  background:var(--bg-soft);
}

.teacher-step-item strong{color:var(--color-main);font-size:12px}
.teacher-step-item span{font-size:13px;color:var(--text-muted)}

.teacher-create-grid{gap:12px}

.teacher-inline-note{
  display:inline-flex;
  align-items:center;
  font-size:13px;
  color:var(--text-muted);
}

.task-section-card{
  padding:18px;
  background:#fff;
  border:1px solid var(--border-soft);
}

.task-section-heading{margin-bottom:12px}

.task-chip,
.badge,
.student-pill,
.student-status-pill,
.student-summary-card__index{
  min-height:26px;
  padding:2px 8px;
  border:1px solid var(--border-soft);
  background:#f5f7fa;
  color:var(--color-main);
}

.badge-success{background:#eff6f1;color:var(--correct);border-color:#cedfd4}
.badge-accent{background:#eef3f8;color:var(--color-accent-strong);border-color:#d6e0ea}
.badge-muted,.task-chip-muted,.student-pill-muted{background:#f5f7fa;color:var(--text-muted)}
.student-pill-soft{background:#f3efe7;color:#7a6747;border-color:#e1d8c6}

.task-card,
.student-test-card,
.student-summary-card,
.student-preview-panel,
.student-exam-panel,
.student-question-card,
.student-feedback-card{
  padding:12px 14px;
  background:#fff;
  border:1px solid var(--border-soft);
}

.teacher-test-card{
  gap:12px;
}

.teacher-test-card--warning{border-color:rgba(221,107,32,0.22);box-shadow:0 10px 24px rgba(221,107,32,0.08)}
.teacher-test-card--muted{border-color:rgba(124,138,150,0.22)}
.teacher-test-card--default{border-color:rgba(31,111,235,0.18)}
.teacher-test-card--success{border-color:rgba(47,158,93,0.22);box-shadow:0 10px 24px rgba(47,158,93,0.08)}

.teacher-test-card__header{
  align-items:flex-start;
}

.teacher-test-card__title-block{
  display:grid;
  gap:8px;
  min-width:0;
}

.teacher-test-card__overview{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}

.teacher-test-state{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:800;
  letter-spacing:.04em;
  background:#eef3f8;
  color:var(--text-strong);
  border:1px solid rgba(15,23,42,0.08);
}

.teacher-test-state.is-warning{background:#fff2e8;color:#b85e1f;border-color:#f0d2bc}
.teacher-test-state.is-muted{background:#f5f7fa;color:var(--text-muted);border-color:#e1e8ef}
.teacher-test-state.is-default{background:var(--color-accent-soft);color:var(--color-accent-strong);border-color:#d6e0ea}
.teacher-test-state.is-success{background:#eff6f1;color:var(--correct);border-color:#cedfd4}

.teacher-test-card__helper{
  font-size:13px;
  color:var(--text-muted);
}

.teacher-test-card__badges{
  max-width:180px;
}

.teacher-test-card__summary-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px;
}

.teacher-test-meta{
  display:grid;
  gap:4px;
  padding:10px 12px;
  border-radius:16px;
  background:var(--bg-soft);
  border:1px solid var(--border-soft);
}

.teacher-test-meta.is-warning{background:#fff8f3;border-color:#f1dccb}

.teacher-test-meta__label{
  font-size:12px;
  color:var(--text-soft);
}

.teacher-test-meta__value{
  font-size:15px;
  color:var(--text-strong);
}

.teacher-test-card__primary-actions,
.teacher-test-card__secondary-actions{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}

.teacher-test-card__details{
  display:grid;
  gap:10px;
  padding-top:12px;
  border-top:1px solid var(--border-soft);
}

.teacher-test-card__controls{
  margin-top:0;
}

.teacher-test-card__detail-note{
  margin-top:0;
}

.teacher-card-meta-grid{
  display:grid;
  gap:4px;
  margin-top:4px;
}

.teacher-card-footer{
  display:flex;
  gap:6px;
  flex-wrap:wrap;
}

.task-card-title,
.student-test-card h3,
.student-preview-panel__header h3{color:var(--color-main)}

.drop-zone{
  min-height:56px;
  justify-content:center;
  background:var(--bg-soft);
  border:1px dashed #b9c8d8;
}

.drop-zone strong{color:var(--text-strong)}

.task-list-row,
.student-empty-state,
.task-empty,
#questions-list li,
#choices-list > div,
.builder-editor-toolbar,
.student-summary-row,
.student-question-track__item{
  background:var(--bg-soft);
  border:1px solid var(--border-soft);
}

.task-warning{
  background:#f8f3e8;
  border:1px solid #e4d7b8;
  border-left:4px solid #c49a3b;
  color:#6b5422;
}

.student-preview-grid,
.student-entry-grid{grid-template-columns:minmax(0,0.9fr) minmax(0,1.1fr);gap:12px}

.student-preview-banner__stats,
.student-summary-stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}

.student-preview-stat{
  padding:12px 14px;
  background:var(--bg-soft);
  border:1px solid var(--border-soft);
}

.student-preview-stat__value,
.student-score-orb__value{color:var(--color-main)}

.student-preview-banner-entry,
.student-preview-banner-loggedin,
.student-summary-hero{
  border-left-color:var(--color-accent);
}

.student-score-orb{
  background:conic-gradient(var(--color-accent) 0 var(--score-angle), #d9e3ee var(--score-angle) 100%);
  box-shadow:none;
}

.student-score-orb__inner{
  background:#fff;
  border:1px solid var(--border-soft);
}

.student-score-orb__eyebrow,
.student-score-orb__sub{color:var(--text-soft)}

.student-exam-shell{grid-template-columns:minmax(0,1fr);gap:18px}

.student-exam-panel-emphasis{
  border-left-color:var(--color-accent);
}

.student-exam-progress-bar{background:#dbe4ee}
.student-exam-progress-bar span{background:var(--color-accent)}

.student-choice-option{
  padding:12px 14px;
  background:#fff;
  border:1px solid var(--border-soft);
  box-shadow:none;
}

.student-choice-option:hover{
  transform:none;
  box-shadow:none;
  border-color:#b8c8d8;
  background:#fbfcfd;
}

.student-choice-option__marker{
  border-color:#9fb1c3;
}

.student-choice-option.is-selected{background:#f1f5f9;border-color:#b7c7d7}
.student-choice-option.is-selected .student-choice-option__marker{border-color:var(--color-accent);background:var(--color-accent);box-shadow:inset 0 0 0 5px #fff}
.student-choice-option.is-correct{background:#f2f7f4;border-color:#bfd4c7}
.student-choice-option.is-correct .student-choice-option__marker{border-color:var(--correct);background:var(--correct);box-shadow:inset 0 0 0 5px #fff}
.student-choice-option.is-incorrect{background:#fbf4ed;border-color:#e1c6a7}
.student-choice-option.is-incorrect .student-choice-option__marker{border-color:var(--incorrect);background:var(--incorrect);box-shadow:inset 0 0 0 5px #fff}

.student-feedback-card.is-correct,
.student-summary-card.is-correct{background:#f6fbf8;border-color:#caded0}

.student-feedback-card.is-incorrect,
.student-summary-card.is-incorrect,
.student-summary-row-note{background:#fbf6ef;border-color:#e6d1b4}

.reports-table thead th{
  background:#f6f8fb;
  color:var(--color-main);
  border-bottom:1px solid var(--border-soft);
}

.reports-table tbody td{background:#fff;color:var(--text-strong)}
.reports-table tbody tr:hover td{background:#fafbfd}
.reports-table .score{background:#eef3f8;color:var(--color-main)}
.reports-table .score.low{background:#fbf0ea;color:#9d5825}
.reports-table .score.high{background:#eff6f1;color:#3f6c56}

#modal-overlay{background:rgba(31,47,61,0.32)}

#modal-content,
.modal-panel{
  background:#fff;
  border:1px solid var(--border-soft);
}

.share-qr-modal__code{background:var(--bg-soft)}

.builder-shortcuts span,
kbd{
  border-radius:6px;
}

.builder-shortcuts span{background:#fff;border:1px solid var(--border-soft)}

kbd{background:#f7f9fb;border:1px solid var(--border-soft);box-shadow:none}

@media (max-width:960px){
  .teacher-page-hero{grid-template-columns:1fr}
  .teacher-workspace-grid,
  .student-preview-grid,
  .student-entry-grid,
  .student-exam-shell,
  .student-summary-hero{grid-template-columns:1fr}
  .teacher-step-list,
  .student-preview-banner__stats,
  .student-summary-stats{grid-template-columns:1fr 1fr}
  .teacher-test-toolbar{flex-direction:column;align-items:flex-start}
  .teacher-class-card__top{grid-template-columns:1fr}
}

@media (max-width:640px){
  .container,.app-shell,.task-builder-shell{padding:16px 12px 32px}
  .teacher-page-flow__list{grid-template-columns:1fr;gap:10px}
  .teacher-page-flow__step{min-height:auto}
  .teacher-page-flow__step:not(:last-child)::before{
    top:auto;
    bottom:-11px;
    left:50%;
    right:auto;
    width:3px;
    height:14px;
    transform:translateX(-50%);
    background:linear-gradient(180deg,#274867,#4d7396);
  }
  .teacher-page-flow__step:not(:last-child)::after{
    top:auto;
    bottom:-12px;
    left:50%;
    right:auto;
    width:10px;
    height:10px;
    border-top:0;
    border-right:3px solid #335779;
    border-bottom:3px solid #335779;
    transform:translateX(-50%) rotate(45deg);
  }
  .teacher-step-list,
  .student-preview-banner__stats,
  .student-summary-stats,
  .student-test-grid,
  .task-card-grid{grid-template-columns:1fr}
  .teacher-test-view-switch{width:100%}
  .teacher-test-view-switch .mode-tab{flex:1;justify-content:center}
  .teacher-test-card__header,
  .teacher-test-card__overview,
  .teacher-test-card__primary-actions,
  .teacher-test-card__secondary-actions{flex-direction:column;align-items:flex-start}
  .teacher-class-card__form,
  .teacher-create-card .task-toggle-row{grid-template-columns:1fr}
  .teacher-create-card .task-section-heading .task-chip{margin-left:0}
  .teacher-test-card__badges{max-width:none;justify-content:flex-start}
  .teacher-test-card__summary-grid{grid-template-columns:1fr}
  .task-page-hero,
  .teacher-page-hero,
  .student-preview-banner,
  .student-summary-hero,
  .task-section-card,
  .student-preview-panel,
  .student-exam-panel,
  .student-question-card,
  .student-feedback-card,
  .task-card{padding:12px}
}

/* Auto-create form: three controls in one row */
.auto-row{display:flex;gap:12px;align-items:flex-start;flex-wrap:wrap;margin-bottom:6px}
.auto-row__item{flex:1;min-width:120px}
.auto-row__item--wide{flex:1.6;min-width:160px}
.auto-row label{display:block;width:100%}
@media (max-width:720px){.auto-row{flex-direction:column}}