/* ============================================================
   main.css — 试卷分析仪 · 教师端
   严格按 DESIGN_BRIEF.md §1-§9
   ============================================================ */

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

/* --- §3 颜色系统 --- */
:root {
  --paper: #FBF7EE;
  --paper-deep: #F2EBD7;
  --paper-edge: #E8DFC6;
  --ink: #1A1A1A;
  --ink-soft: #4A4A4A;
  --ink-mute: #8C8472;
  --vermilion: #C8392B;
  --seal-red: #A02D24;
  --ink-blue: #1B3A57;
  --jade: #5D6D3A;
  --rule: #D6CFB8;
  --rule-strong: #B8AE8E;
  --good-bg: #EAF1DD;
  --warn-bg: #FAF1D9;
  --bad-bg: #F5DCD6;
  --info-bg: #E0E7EC;
  --shadow: 0 1px 0 rgba(70, 50, 20, 0.06);
  --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", serif;
  --font-mono: "JetBrains Mono", "SF Mono", monospace;
}

/* --- Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .display { font-family: var(--font-serif); }
.mono { font-family: var(--font-mono); }

a { color: var(--ink-blue); text-decoration: none; }
a:hover { color: var(--seal-red); }

/* --- §5 Layout: Topbar --- */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--paper-deep);
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  padding: 0 20px;
  z-index: 100;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.topbar-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 auto;
}

.topbar-nav a {
  font-size: 14px;
  color: var(--ink-soft);
  padding: 6px 12px;
  border-radius: 2px;
  transition: color 0.12s;
  white-space: nowrap;
}

.topbar-nav a:hover {
  color: var(--seal-red);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

/* --- §5 Layout: Content --- */
.content {
  margin-top: 56px;
  padding: 24px;
  background: var(--paper);
  min-height: calc(100vh - 56px);
}

/* --- §5 Page Title --- */
.page-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 4px;
}

.page-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 2px;
  background: var(--seal-red);
  margin-top: 8px;
  margin-bottom: 16px;
}

.page-header {
  margin-bottom: 24px;
}

/* --- §6.1 Buttons --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--seal-red);
  color: var(--paper);
  border: 1px solid var(--seal-red);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 8px 16px;
  cursor: pointer;
  box-shadow: 0 1px 0 rgba(70, 50, 20, 0.15);
  transition: transform 0.08s, filter 0.12s;
}

.btn-primary:hover {
  filter: brightness(0.92);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  filter: none;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 6px 12px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}

.btn-ghost:hover {
  background: var(--paper-edge);
  border-color: var(--ink-mute);
}

.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: transparent;
  color: var(--vermilion);
  border: 1px solid var(--vermilion);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 6px 12px;
  cursor: pointer;
  transition: background 0.12s;
}

.btn-danger:hover {
  background: var(--bad-bg);
}

.btn-sm {
  font-size: 13px;
  padding: 4px 10px;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* --- §6.2 Tables --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 13px;
}

.data-table th {
  background: var(--paper-deep);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 13px;
  text-align: left;
  padding: 8px 12px;
  border-bottom: 2px solid var(--rule-strong);
  border-top: 1px solid var(--rule);
}

.data-table td {
  padding: 6px 12px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
}

.data-table tr:hover td {
  background: var(--paper-edge);
}

.data-table .text-muted {
  color: var(--ink-mute);
  font-family: var(--font-sans);
  text-align: center;
}

/* --- §6.3 Inputs --- */
.input {
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  padding: 6px 10px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--ink);
  width: 100%;
  transition: border-color 0.12s, box-shadow 0.12s;
}

.input:focus {
  outline: none;
  border-color: var(--seal-red);
  box-shadow: 0 0 0 3px rgba(160, 45, 36, 0.12);
}

/* --- §6.4 Badges --- */
.badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  border-radius: 2px;
  font-family: var(--font-sans);
  line-height: 1.4;
}

.badge-mini {
  font-size: 10px;
  padding: 1px 5px;
  margin-left: 6px;
  vertical-align: middle;
}

.btn-danger-text {
  color: var(--vermilion);
  border-color: var(--vermilion);
}
.btn-danger-text:hover:not(:disabled) {
  background: var(--bad-bg);
}

.badge-good {
  background: var(--good-bg);
  color: var(--jade);
  border: 1px solid var(--jade);
}

.badge-warn {
  background: var(--warn-bg);
  color: #8B6B14;
  border: 1px solid #8B6B14;
}

.badge-bad {
  background: var(--bad-bg);
  color: var(--vermilion);
  border: 1px solid var(--vermilion);
}

.badge-info {
  background: var(--info-bg);
  color: var(--ink-blue);
  border: 1px solid var(--ink-blue);
}

/* --- Dashboard: Stat Cards --- */
.stat-cards {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  flex: 1;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.stat-label {
  font-size: 16px;
  color: var(--ink-soft);
  font-family: var(--font-serif);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 36px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.1;
}

.stat-sub {
  font-size: 12px;
  color: var(--ink-mute);
  margin-top: 4px;
}

/* --- Section Header --- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--ink);
}

/* --- Login Page --- */
.login-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 56px - 48px);
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--paper);
  padding: 32px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  box-shadow: var(--shadow);
}

.login-header {
  text-align: center;
  margin-bottom: 28px;
}

.login-header h1 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 12px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 4px;
  font-family: var(--font-sans);
}

.form-group input {
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  padding: 8px 10px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--ink);
  width: 100%;
  transition: border-color 0.12s, box-shadow 0.12s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--seal-red);
  box-shadow: 0 0 0 3px rgba(160, 45, 36, 0.12);
}

.error-msg {
  color: var(--vermilion);
  font-size: 13px;
  margin-top: 12px;
  text-align: center;
}

/* --- Toast --- */
#toast-container {
  position: fixed;
  top: 64px;
  right: 16px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* --- Seal SVG --- */
.seal-stamp {
  flex-shrink: 0;
}


/* --- Toast notifications --- */
.toast {
  padding: 10px 16px;
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 14px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  animation: toast-in 0.3s ease-out;
  max-width: 400px;
  pointer-events: auto;
}
.toast.success {
  background: var(--good-bg);
  color: var(--jade);
  border: 1px solid var(--jade);
}
.toast.error {
  background: var(--bad-bg);
  color: var(--vermilion);
  border: 1px solid var(--vermilion);
}
@keyframes toast-in {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- Download list (export / municipal progress) --- */
.download-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.download-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  gap: 8px;
}
.download-list li:last-child { border-bottom: none; }
.download-list a {
  color: var(--ink-blue);
  font-family: var(--font-sans);
  font-size: 14px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.download-list a:hover { color: var(--seal-red); }
.download-list .file-name {
  font-family: var(--font-mono);
  font-size: 13px;
}

/* --- Topbar nav active state --- */
.topbar-nav a.nav-active {
  color: var(--seal-red);
  font-weight: 500;
}

/* --- Mobile nav drawer --- */
.mobile-nav {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  background: var(--paper-deep);
  border-bottom: 1px solid var(--rule);
  padding: 12px 20px;
  z-index: 99;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.mobile-nav.open { display: block; }
.mobile-nav a {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover,
.mobile-nav a.nav-active {
  color: var(--seal-red);
}

/* ============================================================
   §7 Mobile Responsive
   ============================================================ */

/* --- Hamburger button --- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 200;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.hamburger.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* --- Tablet (≤1024px) --- */
@media (max-width: 1024px) {
  .topbar-nav { display: none; }
  .hamburger { display: flex; }
}

/* --- Mobile (≤768px) --- */
@media (max-width: 768px) {
  /* Topbar */
  .topbar {
    padding: 0 12px;
  }
  .topbar-title {
    font-size: 14px;
  }
  .topbar-right {
    font-size: 12px;
    gap: 8px;
  }

  /* Stat cards */
  .stat-cards {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 8px !important;
  }
  .stat-card {
    flex: none !important;
    min-width: 0 !important;
    padding: 10px 12px !important;
  }
  .stat-value {
    font-size: 20px !important;
  }

  /* Tables: horizontal scroll */
  .data-table,
  table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }
  thead, tbody, tr, th, td {
    white-space: nowrap;
  }

  /* Buttons */
  .btn-primary, .btn-ghost {
    padding: 8px 14px;
    font-size: 13px;
  }

  /* Forms */
  input, select, textarea {
    font-size: 16px !important;
    max-width: 100%;
  }
  .form-row {
    flex-direction: column;
    gap: 8px;
  }
  .filter-bar {
    flex-direction: column;
    gap: 8px;
  }
  .filter-bar .form-field {
    width: 100%;
  }
  .filter-bar select,
  .filter-bar input {
    width: 100%;
  }

  /* Cards */
  .card {
    padding: 12px;
  }

  /* Export cards grid */
  .export-cards {
    grid-template-columns: 1fr !important;
  }

  /* Page title */
  .page-title {
    font-size: 20px;
  }

  /* Toast */
  #toast-container {
    bottom: 80px;
    left: 16px;
    right: 16px;
  }

  /* Match / imports grid */
  .imports-grid {
    grid-template-columns: 1fr !important;
  }
  .match-grid {
    grid-template-columns: 1fr !important;
  }
  .match-form {
    flex-direction: column;
    align-items: stretch;
  }
  .match-form select,
  .match-form input {
    width: 100%;
  }

  /* Module config */
  .module-grid {
    grid-template-columns: 1fr !important;
  }

  /* Municipal */
  .mun-actions-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .mun-actions-bar .btn-primary {
    width: 100%;
    text-align: center;
  }
  .mun-grid {
    grid-template-columns: 1fr !important;
  }

  /* Modal */
  .modal-card {
    width: 95% !important;
    max-height: 90vh;
    overflow-y: auto;
  }

  /* Topbar right: smaller */
  .topbar-right #current-user-name {
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

/* --- Small phone (≤480px) --- */
@media (max-width: 480px) {
  .stat-cards {
    grid-template-columns: 1fr !important;
  }
  .topbar-left .seal-stamp {
    width: 24px;
    height: 24px;
  }
}