/* NormChecker — clean SaaS-style UI */

:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.06);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.main-pad { flex: 1; padding-bottom: 3rem; padding-top: 1.5rem; }

/* Top bar */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  padding: 0.65rem 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
}
.brand-text { letter-spacing: -0.02em; }
.topbar-nav { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.nav-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-link:hover { text-decoration: underline; }

.pill {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
}
.pill-muted { background: #f1f5f9; color: var(--muted); }
.role-pill {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
}
.role-teacher { background: #eff6ff; color: #1d4ed8; }
.role-student { background: #ecfdf5; color: #047857; }
.role-admin { background: #fef3c7; color: #b45309; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1rem 0;
  font-size: 0.8rem;
  color: var(--muted);
  background: var(--surface);
}

/* Typography */
h1 {
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 0.35rem;
}
.page-head { margin-bottom: 1.5rem; }
.lead { color: var(--muted); margin: 0; font-size: 0.98rem; max-width: 52ch; }

h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 1rem;
  color: #1e293b;
}

h3 { font-size: 1rem; margin: 0 0 0.5rem; }

/* Cards */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  margin-bottom: 1.25rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.card-form label { display: block; margin-bottom: 0.65rem; font-size: 0.9rem; color: #334155; }
.card input[type="text"],
.card input[type="password"],
.card input[type="number"],
.card input[type="file"],
.card input[type="datetime-local"],
.card select,
.card textarea {
  width: 100%;
  max-width: 420px;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font: inherit;
  background: #fafafa;
}
.card textarea { max-width: 100%; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.dash-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  background: linear-gradient(180deg, #fff 0%, #fafbfc 100%);
}
.dash-card-head { margin-bottom: 0.5rem; }
.stat-line { margin: 0.35rem 0; font-size: 0.92rem; color: #475569; }
.stack { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.75rem; }
.stack input, .stack select { max-width: 100%; }

.form-grid {
  display: grid;
  gap: 0.75rem;
  max-width: 480px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  border: none;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  font-size: 0.92rem;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: #f1f5f9; color: #0f172a; border: 1px solid var(--border); }
.btn-secondary:hover { background: #e2e8f0; }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.85rem; }

.link-back {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}
.link-back:hover { text-decoration: underline; }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge-training { background: #d1fae5; color: #047857; }
.badge-testing { background: #fee2e2; color: #b91c1c; }
.badge-published { background: #dbeafe; color: #1d4ed8; }

/* Tables */
.tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.tbl th, .tbl td {
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.tbl th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 600;
}
.tbl tr:hover td { background: #fafafa; }

.tbl-actions { white-space: nowrap; }
.tbl-actions a { color: var(--primary); font-weight: 500; text-decoration: none; }
.tbl-actions a:hover { text-decoration: underline; }

/* Alerts */
.err { color: var(--danger); font-weight: 500; }
.ok { color: var(--success); font-weight: 600; font-size: 0.85rem; }
.hint { font-size: 0.88rem; color: var(--muted); }
.meta { font-size: 0.85rem; color: var(--muted); }

/* Attempt result */
.score-line { font-size: 1.25rem; font-weight: 700; color: #0f172a; margin: 0.5rem 0; }
.banner-mode {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-size: 0.92rem;
}
.banner-testing {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}
.banner-training {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.errs { margin: 0.35rem 0 0 1rem; padding: 0; font-size: 0.88rem; color: #334155; }

.login-card { max-width: 400px; margin: 2rem auto; }

code { font-size: 0.85em; background: #f1f5f9; padding: 0.1rem 0.35rem; border-radius: 4px; }

.inline { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

/* Student dashboard: work cards */
.section-block { margin-bottom: 2.25rem; }
.section-title {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  font-size: 1.2rem;
  margin: 0 0 0.35rem;
}
.section-desc { color: var(--muted); font-size: 0.92rem; margin: 0 0 1rem; max-width: 60ch; }
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}
.work-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow);
}
.work-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}
.work-card-head h3 { margin: 0; font-size: 1.05rem; }
.work-card-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.85rem; }
.empty-state { text-align: center; color: var(--muted); padding: 2rem 1rem; }

.btn-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

/* Student work detail */
.work-page-head { margin-bottom: 1.25rem; }
.work-page-title { display: flex; align-items: center; gap: 0.65rem; flex-wrap: wrap; margin-bottom: 0.35rem; }
.file-actions { margin-top: 0.5rem; }
.steps-card .steps-list {
  margin: 0;
  padding-left: 0;
  list-style: none;
  counter-reset: step;
}
.steps-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  margin-bottom: 0.65rem;
  font-size: 0.95rem;
  color: #334155;
}
.step-num {
  flex-shrink: 0;
  width: 1.65rem;
  height: 1.65rem;
  border-radius: 999px;
  background: #eff6ff;
  color: var(--primary);
  font-weight: 700;
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.stat-highlight {
  background: linear-gradient(135deg, #f8fafc 0%, #fff 100%);
  border-left: 4px solid var(--primary);
}
.score-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  background: #f1f5f9;
  font-weight: 600;
  font-size: 0.88rem;
}
.comments-card .comment-list { list-style: none; margin: 0; padding: 0; }
.comment-item {
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 0;
}
.comment-item:last-child { border-bottom: none; }
.comment-body { margin: 0 0 0.35rem; white-space: pre-wrap; }