/**
 * L03 一般过去时讲义 · 专题样式（外壳见 ../shared/grammar-handout.css）
 */

:root {
      --paper: #fff9f0;
      --ink: #222;
      --ink-soft: #555;
      --crayon-red: #e85d4c;
      --crayon-blue: #4a90d9;
      --crayon-green: #5cb85c;
      --crayon-purple: #9b59b6;
      --crayon-orange: #f0ad4e;
      --shadow: rgba(60, 40, 20, 0.1);
      --lesson-font-sans: system-ui, -apple-system, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --lesson-fs-example: clamp(1.02rem, 0.5vw + 0.9rem, 1.2rem);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; font-size: 16px; }
body.grammar-handout-page.l03-handout {
      font-family: var(--lesson-font-sans);
      background:
        radial-gradient(circle at 10% 15%, rgba(255, 220, 180, 0.38) 0%, transparent 42%),
        radial-gradient(circle at 90% 85%, rgba(200, 230, 255, 0.32) 0%, transparent 40%),
        linear-gradient(168deg, #ffeaa7 0%, #fab1a0 30%, #dfe6e9 100%);
      color: var(--ink);
    }
    .no-print-hint {
      text-align: center;
      font-size: 0.82rem;
      color: #1565c0;
      margin: 0 auto 0.65rem;
      max-width: 860px;
      font-weight: 700;
    }
    .handout-pdf-bar {
      max-width: 860px;
      margin: 0 auto 0.75rem;
      padding: 0 0.5rem;
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    .btn-handout-pdf {
      font-family: var(--lesson-font-sans);
      font-size: 0.92rem;
      padding: 0.5rem 1.15rem;
      border-radius: 999px;
      border: 3px solid var(--crayon-orange);
      background: linear-gradient(180deg, #fff 0%, #fff9f0 100%);
      color: #1565c0;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 2px 3px 0 rgba(0, 0, 0, 0.08);
      touch-action: manipulation;
    }
    .btn-handout-pdf:hover { background: #e3f2fd; }
    .name-toolbar {
      max-width: 860px;
      margin: 0 auto 0.85rem;
      padding: 0.65rem 0.85rem;
      text-align: center;
      background: rgba(255, 255, 255, 0.88);
      border-radius: 14px;
      border: 3px solid rgba(93, 64, 55, 0.35);
      box-shadow: 2px 3px 0 rgba(0, 0, 0, 0.06);
    }
    .name-toolbar label {
      display: block;
      font-weight: 900;
      color: #4e342e;
      margin-bottom: 0.35rem;
    }
    .name-toolbar input {
      width: min(100%, 360px);
      padding: 0.45rem 0.6rem;
      border-radius: 10px;
      border: 3px solid #5d4037;
      font-family: var(--lesson-font-sans);
      font-size: var(--lesson-fs-example);
      font-size: 1.05rem;
    }
    .name-toolbar .hint {
      margin: 0.4rem 0 0;
      font-size: 0.78rem;
      color: var(--ink-soft);
    }
body.grammar-handout-page main.sheet.l03-handout {
      max-width: var(--gh-sheet-max, 900px);
      margin: 0 auto;
      background: var(--paper);
      border-radius: 12px 28px 16px 20px;
      border: 4px solid var(--crayon-orange);
      box-shadow: 6px 8px 0 rgba(232, 93, 76, 0.35), 14px 18px 32px var(--shadow);
      padding: 1.5rem 1.5rem 2rem;
      position: relative;
    }
    .sheet::before {
      content: "";
      position: absolute;
      inset: 10px;
      border: 2px dashed rgba(180, 140, 90, 0.38);
      border-radius: 6px 22px 10px 8px;
      pointer-events: none;
    }
    .inner { position: relative; z-index: 1; }

    .handout-cover {
      position: relative;
      margin: -0.25rem -0.5rem 1.25rem;
      padding: 2.5rem 1.5rem 2.75rem;
      border-radius: 10px 24px 12px 20px;
      overflow: hidden;
      text-align: center;
      color: #1a2a3a;
    }
    .handout-cover__bg {
      position: absolute;
      inset: 0;
      background:
        linear-gradient(145deg, #e8f4f8 0%, #f8fbfd 42%, #fff 100%),
        radial-gradient(ellipse 80% 60% at 15% 10%, rgba(74, 144, 217, 0.18), transparent 55%),
        radial-gradient(ellipse 70% 50% at 90% 85%, rgba(13, 148, 136, 0.12), transparent 50%);
      border: 1px solid rgba(13, 148, 136, 0.2);
      border-radius: inherit;
      z-index: 0;
    }
    .handout-cover__bg::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 5px;
      background: linear-gradient(90deg, #0d9488, #4a90d9, #0d9488);
    }
    .handout-cover__bg::after {
      content: "";
      position: absolute;
      inset: 0;
      background-image: radial-gradient(
          circle at 20% 30%,
          rgba(74, 144, 217, 0.07) 0 1px,
          transparent 1px
        ),
        radial-gradient(circle at 80% 70%, rgba(13, 148, 136, 0.06) 0 1px, transparent 1px);
      background-size: 18px 18px, 22px 22px;
      opacity: 0.65;
      pointer-events: none;
    }
    .handout-cover__inner {
      position: relative;
      z-index: 1;
      max-width: 28rem;
      margin: 0 auto;
    }
    .handout-cover__brand {
      margin: 0 0 1rem;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.2em;
      color: #0f766e;
    }
    .handout-cover__en {
      margin: 0 0 0.35rem;
      font-family: "Georgia", "Times New Roman", "Songti SC", serif;
      font-size: 1.05rem;
      font-style: italic;
      letter-spacing: 0.12em;
      color: #4a7c9b;
    }
    .handout-cover__title {
      margin: 0 0 0.5rem;
      font-size: clamp(2rem, 5vw, 2.65rem);
      font-weight: 800;
      letter-spacing: 0.14em;
      line-height: 1.2;
      color: #0d1b2a;
    }
    .handout-cover__rule {
      width: 3.5rem;
      height: 3px;
      margin: 0 auto 1rem;
      border-radius: 2px;
      background: linear-gradient(90deg, transparent, #0d9488, transparent);
    }
    .handout-cover__focus {
      margin: 0;
      font-size: 0.88rem;
      line-height: 1.65;
      font-weight: 500;
      color: #475569;
      letter-spacing: 0.04em;
    }

    h2.section-title {
      font-family: var(--lesson-font-sans);
      font-size: 1.12rem;
      color: #1a237e;
      margin: 1.4rem 0 0.75rem;
      padding-bottom: 0.35rem;
      border-bottom: 3px solid rgba(74, 144, 217, 0.35);
    }

    .handout-section > h2.section-title:first-child {
      margin-top: 0;
    }

    .handout-golden-two-col {
      display: grid;
      grid-template-columns: 1fr;
      gap: 0.5rem;
    }

    @media screen and (min-width: 640px) {
      .handout-golden-two-col {
        grid-template-columns: 1fr 1fr;
        gap: 0.55rem 0.65rem;
      }
    }
    .usage-group-title {
      font-family: var(--lesson-font-sans);
      font-size: 0.95rem;
      color: #0d47a1;
      margin: 0.9rem 0 0.45rem;
      padding: 0.3rem 0.5rem;
      background: rgba(227, 242, 253, 0.65);
      border-radius: 8px;
      border-left: 4px solid var(--crayon-blue);
    }
    .usage-host .usage-group-title:first-child {
      margin-top: 0;
    }
    .usage-sub {
      font-size: 0.86rem;
      font-weight: 800;
      color: #4e342e;
      margin: 0.45rem 0 0.1rem;
    }
    .usage-rule {
      font-size: 0.8rem;
      color: var(--ink-soft);
      margin: 0 0 0.35rem;
      line-height: 1.5;
    }
    table.data-table {
      width: 100%;
      border-collapse: collapse;
      margin-bottom: 0.85rem;
      font-size: 0.82rem;
    }
    table.data-table th,
    table.data-table td {
      border: 2px solid rgba(0, 0, 0, 0.12);
      padding: 0.4rem 0.5rem;
      vertical-align: top;
      text-align: left;
    }
    table.data-table th {
      background: rgba(74, 144, 217, 0.15);
      color: #0d47a1;
    }
    button.tts-chip {
      font-family: var(--lesson-font-sans);
      font-size: var(--lesson-fs-example);
      font-size: 0.76rem;
      padding: 0.12rem 0.42rem;
      margin-left: 0.35rem;
      border-radius: 999px;
      border: 2px solid var(--crayon-red);
      background: #fff;
      cursor: pointer;
      vertical-align: middle;
      touch-action: manipulation;
    }
    button.tts-chip:hover { background: #ffebee; }
    .vb {
      color: var(--crayon-purple);
      font-weight: 800;
    }
    .foot {
      margin-top: 1rem;
      font-size: 0.78rem;
      text-align: center;
      border-top: 1px solid #000;
      padding-top: 0.45rem;
    }
    .print-hint {
      font-size: 0.76rem;
      color: #888;
      text-align: center;
      margin-top: 1.1rem;
    }
    .lesson-footer-nav {
      max-width: 860px;
      margin: 1.25rem auto 0;
      padding: 0.5rem 0.75rem;
      text-align: center;
      font-size: 0.84rem;
      color: #555;
      font-family: var(--lesson-font-sans);
    }
    .lesson-footer-nav a {
      color: var(--crayon-blue);
      text-decoration: none;
      font-weight: 700;
    }
    .lesson-footer-nav .nav-sep { margin: 0 0.35rem; color: #aaa; }
    .tap-card { transition: transform 0.12s ease; }
    .tap-card:hover { transform: scale(1.005); }
    @media (hover: none) and (pointer: coarse) {
      .tap-card:active { transform: scale(0.985); }
    }
    /* 打印版式：见 ../grammar-handout-print.css */

@media print {
      .vb {
        color: #000 !important;
        font-weight: 700 !important;
        text-decoration: underline;
      }
    }