/* ============================================================
   家长工具 · 共享样式
   ============================================================ */

:root {
  --paper: #ffffff;
  --ink: #18181b;
  --ink-soft: #52525b;
  --primary: #16a34a;
  --primary-hover: #15803d;
  --crimson: #16a34a;
  --accent: #16a34a;
  --bg: #09090b;
  --bg-soft: #18181b;
  --line: #27272a;
  --muted: #a1a1aa;
  --gold: #22c55e;
  --ff-display: "Inter", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --ff-mono: "JetBrains Mono", "Courier New", monospace;
  --paper-w: 210mm;
  --paper-h: 297mm;
  --topbar-h: 60px;
  --text-color: #fafafa;
  --topbar-bg: rgba(9,9,11,.95);
  --topbar-border: rgba(255,255,255,.06);
  --btn-bg: rgba(255,255,255,.03);
  --btn-border: rgba(255,255,255,.08);
  --btn-hover-bg: rgba(34,197,94,.08);
}

[data-theme="light"] {
  --bg: #fafafa;
  --bg-soft: #f4f4f5;
  --line: #e4e4e7;
  --muted: #71717a;
  --gold: #16a34a;
  --text-color: #18181b;
  --topbar-bg: rgba(255,255,255,0.95);
  --topbar-border: #e4e4e7;
  --btn-bg: rgba(0,0,0,0.03);
  --btn-border: #e4e4e7;
  --btn-hover-bg: rgba(22,163,74,0.05);
  --card-shadow: 0 4px 24px rgba(0,0,0,0.05);
  --card-shadow-hover: 0 8px 32px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--ff-display);
  background: var(--bg);
  color: var(--text-color);
  line-height: 1.5;
  min-height: 100vh;
  transition: background .4s ease, color .4s ease;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(34,197,94,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34,197,94,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}
[data-theme="light"] body::before {
  background-image:
    linear-gradient(to right, rgba(22,163,74,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22,163,74,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* 主题切换按钮 */
.theme-toggle {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--btn-bg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all .2s cubic-bezier(.4,0,.2,1);
  flex-shrink: 0;
  color: var(--muted);
}
.theme-toggle:hover {
  color: var(--text-color);
  border-color: var(--primary);
  background: var(--btn-hover-bg);
}

/* 顶部栏 */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--topbar-bg);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border-bottom: 1px solid var(--topbar-border);
  z-index: 100;
}
.topbar-inner {
  max-width: 1400px;
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.logo { display: flex; align-items: center; gap: 12px; min-width: 0; }
.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  text-decoration: none;
  border-radius: 10px;
  transition: all .2s cubic-bezier(.4,0,.2,1);
  flex-shrink: 0;
}
[data-theme="dark"] .back-link {
  color: var(--muted);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.02);
}
[data-theme="dark"] .back-link:hover {
  color: var(--text-color);
  border-color: var(--primary);
  background: rgba(34,197,94,.08);
  transform: translateX(-2px);
}
[data-theme="light"] .back-link {
  color: #71717a;
  border: 1px solid #e4e4e7;
  background: #fafafa;
}
[data-theme="light"] .back-link:hover {
  color: #18181b;
  border-color: #16a34a;
  background: rgba(22,163,74,.05);
  transform: translateX(-2px);
}
.logo-icon { font-size: 20px; }
.logo-text h1 {
  font-family: var(--ff-display);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: .03em;
  white-space: nowrap;
}
[data-theme="dark"] .logo-text h1 { color: var(--text-color); }
[data-theme="light"] .logo-text h1 { color: #18181b; }
.logo-text p {
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  opacity: 0.7;
}
[data-theme="dark"] .logo-text p { color: var(--muted); }
[data-theme="light"] .logo-text p { color: #71717a; }
.topbar-actions { display: flex; align-items: center; gap: 6px; }
.ghost-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  padding: 8px 14px;
  border-radius: 10px;
  font-family: var(--ff-display);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all .2s cubic-bezier(.4,0,.2,1);
}
[data-theme="dark"] .ghost-btn { color: var(--text-color); }
[data-theme="light"] .ghost-btn { color: #18181b; }
.ghost-btn:hover {
  background: var(--btn-hover-bg);
  border-color: var(--primary);
}
[data-theme="dark"] .ghost-btn:hover {
  color: var(--text-color);
}
[data-theme="light"] .ghost-btn:hover {
  color: #18181b;
}
.ghost-btn:disabled { opacity: .3; cursor: not-allowed; }
.ghost-btn:disabled:hover { background: var(--btn-bg); border-color: var(--btn-border); }
.ghost-btn svg { flex-shrink: 0; }

/* 主区域 */
.main {
  padding-top: var(--topbar-h);
  min-height: 100vh;
  position: relative;
  z-index: 1;
}
.output {
  padding: 32px 24px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

/* A4 纸张 */
.paper {
  background: var(--paper);
  width: var(--paper-w);
  min-height: var(--paper-h);
  padding: 20mm 15mm 15mm;
  box-shadow:
    0 2px 4px rgba(0,0,0,.05),
    0 8px 16px rgba(0,0,0,.08),
    0 24px 48px rgba(0,0,0,.1);
  position: relative;
  color: var(--ink);
  flex-shrink: 0;
  border-radius: 8px;
}
.paper::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.3) 0%, transparent 50%);
  pointer-events: none;
  border-radius: inherit;
}
.paper > * { position: relative; }
.paper-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 2px solid var(--primary);
  padding-bottom: 7px;
  margin-bottom: 4px;
  font-family: var(--ff-display);
  font-size: 14px;
  font-weight: 700;
}
.underline-field {
  display: inline-block;
  min-width: 80px;
  border-bottom: 1px solid var(--ink);
}
.paper-title {
  text-align: center;
  font-family: var(--ff-display);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: .08em;
  margin: 16px 0 12px;
  color: var(--primary);
}
.paper-footer {
  margin-top: 16px;
  padding-top: 8px;
  border-top: 1px dashed var(--ink-soft);
  text-align: center;
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--ink-soft);
}

/* 练习记录表格 */
.log-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}
.log-table th {
  font-family: var(--ff-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  padding: 8px 4px;
  border-bottom: 2px solid var(--primary);
  text-align: center;
}
.log-table td {
  border: 1px solid #ccc;
  vertical-align: top;
  padding: 4px;
  height: 72px;
}
.log-table .empty { border-color: transparent; }
.day-num {
  font-family: var(--ff-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  display: block;
  margin-bottom: 4px;
}
.log-table .today .day-num {
  color: var(--primary);
  font-weight: 700;
}
.day-content {
  min-height: 48px;
}

/* 成绩追踪表格 */
.score-table {
  width: 100%;
  border-collapse: collapse;
}
.score-table th {
  font-family: var(--ff-display);
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  padding: 8px 6px;
  border-bottom: 2px solid var(--primary);
  text-align: center;
}
.score-table td {
  border: 1px solid #ccc;
  padding: 8px 6px;
  text-align: center;
  font-family: var(--ff-mono);
  font-size: 12px;
  color: var(--ink);
  height: 36px;
}
.score-table tr:nth-child(even) {
  background: rgba(0,0,0,.02);
}

/* 学习计划表格 */
.plan-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}
.plan-table th {
  font-family: var(--ff-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  padding: 8px 4px;
  border-bottom: 2px solid var(--primary);
  text-align: center;
}
.plan-table td {
  border: 1px solid #ccc;
  padding: 6px;
  vertical-align: top;
  font-size: 13px;
  color: var(--ink);
  height: 60px;
}
.plan-table .time-col {
  width: 70px;
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--ink-soft);
  text-align: center;
  vertical-align: middle;
}
.plan-table .empty { border-color: transparent; }

/* 图例 */
.legend {
  font-size: 11px;
  color: var(--ink-soft);
}

/* 响应式 */
@media (max-width: 1024px) {
  .output { padding: 12px 0 40px; gap: 14px; }
  .paper-stage {
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: center;
  }
  .paper-scaler {
    /* transform / width 由 JS 设置 */
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}

/* 打印样式 */
@page {
  size: A4;
  margin: 12mm;
  margin-top: 0;
  margin-bottom: 0;
}
@media print {
  html, body { background: #fff; }
  body::before, body::after, .topbar, .theme-toggle { display: none !important; }
  .main { margin: 0; padding: 0; }
  .output { padding: 0; gap: 0; display: block; }
  .paper-stage {
    width: auto !important;
    height: auto !important;
    overflow: visible !important;
    display: block !important;
  }
  .paper-scaler {
    transform: none !important;
    width: auto !important;
    display: block !important;
  }
  .paper {
    width: 210mm;
    min-height: auto;
    margin: 0;
    background: #fff !important;
    box-shadow: none;
    page-break-after: always;
    break-after: page;
  }
  .paper::before { display: none; }
  .paper:last-child { page-break-after: auto; break-after: auto; }
}