/* ============ Neobrutalism Design System — AI 音乐提示词生成器 ============
   tokens: primary #FDC800 / secondary #432DD7 / success #16A34A
           warning #D97706 / danger #DC2626 / surface #FBFBF9 / text #1C293C
   type scale: 13/15/17/21/27/35 | spacing: 4/8/12/16/24/32 | radius: 4/8 */

:root {
  --primary: #FDC800;
  --secondary: #432DD7;
  --success: #16A34A;
  --warning: #D97706;
  --danger: #DC2626;
  --surface: #FBFBF9;
  --text: #1C293C;
  --white: #FFFFFF;

  --border: 3px solid var(--text);
  --border-thin: 2px solid var(--text);
  --shadow: 5px 5px 0 var(--text);
  --shadow-sm: 3px 3px 0 var(--text);
  --shadow-lg: 8px 8px 0 var(--text);
  --radius: 8px;
  --radius-sm: 4px;

  --font: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--surface);
  background-image:
    linear-gradient(rgba(28, 41, 60, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 41, 60, .05) 1px, transparent 1px);
  background-size: 32px 32px;
}

.wrap { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

/* ---------- 焦点可见性（WCAG 2.2 AA） ---------- */
:focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font-family: var(--font); font-weight: 700; font-size: 15px;
  padding: 10px 20px; border: var(--border); border-radius: var(--radius);
  background: var(--white); color: var(--text); cursor: pointer;
  box-shadow: var(--shadow-sm); text-decoration: none;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover:not(:disabled) { transform: translate(-2px, -2px); box-shadow: var(--shadow); }
.btn:active:not(:disabled) { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--text); }
.btn:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; }
.btn-primary { background: var(--primary); }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-ghost { background: var(--white); }
.btn-lg { font-size: 17px; padding: 14px 28px; box-shadow: var(--shadow); }
.btn-sm { font-size: 13px; padding: 6px 12px; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--primary); border-bottom: var(--border);
}
.topbar-inner { display: flex; align-items: center; gap: 24px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.brand-mark {
  width: 34px; height: 34px; display: grid; place-items: center;
  background: var(--secondary); color: #fff; font-size: 18px; font-weight: 800;
  border: var(--border-thin); border-radius: var(--radius-sm);
  box-shadow: 2px 2px 0 var(--text);
}
.brand-name { font-weight: 800; font-size: 17px; }
.topbar-inner > .btn { margin-left: auto; }
/* 锚点滚动：距吸顶导航栏留出间距（导航 62px + 24px 呼吸位） */
#presets, #generator, #output { scroll-margin-top: 86px; }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 40px; }
.kicker {
  font-family: var(--mono); font-size: 13px; font-weight: 700; letter-spacing: .12em;
  display: inline-block; background: var(--secondary); color: #fff;
  border: var(--border-thin); border-radius: var(--radius-sm);
  padding: 4px 10px; box-shadow: var(--shadow-sm); margin-bottom: 20px;
}
.hero h1 { font-size: 44px; line-height: 1.15; font-weight: 900; letter-spacing: -.01em; max-width: 800px; }
.hero .hl { background: var(--primary); padding: 0 8px; box-decoration-break: clone; -webkit-box-decoration-break: clone; border: var(--border-thin); border-radius: 6px; }
.lead { font-size: 17px; max-width: 640px; margin-top: 20px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.stat {
  background: var(--white); border: var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); padding: 12px 20px; min-width: 150px;
}
.stat b { display: block; font-size: 27px; font-weight: 900; color: var(--secondary); }
.stat span { font-size: 13px; font-weight: 600; }

/* ---------- 布局：桌面上双栏 ---------- */
.layout {
  display: grid; grid-template-columns: 1fr 400px; gap: 24px;
  padding-top: 8px; padding-bottom: 64px; align-items: start;
}
.output-sticky { position: sticky; top: 82px; display: flex; flex-direction: column; gap: 20px; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--white); border: var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 24px; margin-bottom: 24px;
}
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.card h2 { font-size: 21px; font-weight: 800; display: flex; align-items: center; gap: 10px; }
.card-sub { font-size: 13px; color: rgba(28,41,60,.72); margin-bottom: 16px; }
.step-no {
  font-family: var(--mono); font-size: 13px; font-weight: 700;
  background: var(--text); color: var(--primary); padding: 3px 8px; border-radius: var(--radius-sm);
}
.tag {
  font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: .08em;
  background: var(--secondary); color: #fff; padding: 3px 8px; border-radius: var(--radius-sm);
  border: 2px solid var(--text);
}
.tag-live { background: var(--success); }

/* ---------- 预设 ---------- */
.search-box input {
  font-family: var(--font); font-size: 14px; font-weight: 600;
  padding: 8px 12px; border: var(--border-thin); border-radius: var(--radius);
  background: var(--surface); color: var(--text); width: 200px;
}

/* ---------- 双随机组合按钮 ---------- */
.random-bar { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.random-btn {
  display: flex; align-items: center; gap: 12px; text-align: left;
  padding: 14px 16px; border: var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); color: #fff; cursor: pointer;
  font-family: var(--font); transition: transform .12s ease, box-shadow .12s ease, opacity .12s ease;
}
.random-btn:hover:not(:disabled) { transform: translate(-2px, -2px); box-shadow: var(--shadow-lg); }
.random-btn:active:not(:disabled) { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--text); }
.random-btn:disabled { opacity: .6; cursor: wait; }
.random-btn-smart { background: linear-gradient(120deg, #64cc8a 0%, #644fec 100%); }
.random-btn-expert { background: linear-gradient(120deg, #e01b35 0%, #b7da1f 100%); }
.rb-icon { font-size: 24px; line-height: 1; flex: none; }
.rb-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.rb-text b { font-size: 16px; font-weight: 800; }
.rb-text small { font-size: 12px; font-weight: 600; opacity: .85; }
.rb-arrow { margin-left: auto; font-size: 22px; font-weight: 800; flex: none; }
.random-status {
  font-family: var(--mono); font-size: 12.5px; font-weight: 700;
  border: var(--border-thin); border-radius: var(--radius-sm);
  padding: 7px 12px; margin-bottom: 14px; background: var(--surface); color: var(--text);
  box-shadow: var(--shadow-sm);
}
.random-status.is-smart { background: #E7F6EC; border-color: var(--success); }
.random-status.is-expert { background: #F0EDFF; border-color: var(--secondary); }
.random-status .rs-close { float: right; cursor: pointer; font-weight: 800; background: none; border: none; color: var(--text); font-size: 14px; padding: 0 2px; }

.preset-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.preset {
  text-align: left; background: var(--surface); border: var(--border-thin);
  border-radius: var(--radius); padding: 12px; cursor: pointer;
  box-shadow: var(--shadow-sm); font-family: var(--font); color: var(--text);
  transition: transform .12s ease, box-shadow .12s ease; position: relative;
}
.preset:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow); background: var(--primary); }
.preset.is-active { background: var(--primary); box-shadow: var(--shadow); }
.preset.is-active::after { content: "✓"; position: absolute; top: -10px; right: -10px; width: 24px; height: 24px; background: var(--success); color: #fff; border: 2px solid var(--text); border-radius: 50%; display: grid; place-items: center; font-size: 13px; font-weight: 800; }
.preset b { display: block; font-size: 15px; font-weight: 800; margin-bottom: 2px; }
.preset span { font-size: 12px; line-height: 1.4; display: block; color: rgba(28,41,60,.75); }
.empty-tip { font-size: 13px; color: rgba(28,41,60,.6); padding: 8px 0; }

/* ---------- 参数组 ---------- */
.group { border: var(--border-thin); border-radius: var(--radius); margin-bottom: 16px; overflow: hidden; background: var(--surface); }
.group-head {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 14px; background: var(--text); color: var(--white);
}
.group-head h3 { font-size: 15px; font-weight: 800; }
.group-head .req { color: var(--primary); font-size: 13px; }
.group-count { font-family: var(--mono); font-size: 12px; background: var(--primary); color: var(--text); padding: 1px 8px; border-radius: 999px; font-weight: 700; }
.group-tools { margin-left: auto; display: flex; gap: 8px; }
.group-tools button {
  font-family: var(--font); font-size: 12px; font-weight: 700; cursor: pointer;
  background: var(--white); color: var(--text); border: 2px solid var(--white);
  border-radius: var(--radius-sm); padding: 3px 9px;
}
.group-tools button:hover { background: var(--primary); border-color: var(--primary); }
.group-search { padding: 10px 14px 0; }
.group-search input {
  width: 100%; font-family: var(--font); font-size: 13px; padding: 7px 10px;
  border: var(--border-thin); border-radius: var(--radius-sm); background: var(--white); color: var(--text);
}
.chips {
  display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 14px; max-height: 190px;
  overflow-y: auto;
}
.chip {
  font-family: var(--font); font-size: 13px; font-weight: 600; cursor: pointer;
  background: var(--white); color: var(--text); border: var(--border-thin);
  border-radius: 999px; padding: 4px 12px; transition: background .1s ease;
}
.chip:hover { background: var(--primary); }
.chip.is-on { background: var(--secondary); color: #fff; border-color: var(--text); box-shadow: 2px 2px 0 var(--text); }
.chip.is-on::before { content: "✓ "; font-weight: 800; }

/* ---------- 进阶设置 ---------- */
.adv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.field-label { display: block; font-family: var(--mono); font-size: 13px; font-weight: 700; letter-spacing: .04em; margin-bottom: 6px; }
.adv-grid select, textarea {
  width: 100%; font-family: var(--font); font-size: 14px; font-weight: 600;
  padding: 9px 12px; border: var(--border-thin); border-radius: var(--radius);
  background: var(--white); color: var(--text);
}
textarea { font-weight: 500; resize: vertical; }
.char-count { font-family: var(--mono); font-size: 12px; color: rgba(28,41,60,.65); text-align: right; margin-top: 6px; }

/* ---------- 输出面板 ---------- */
.card-output { background: var(--primary); }
.tabs { display: flex; gap: 8px; margin: 10px 0 12px; }
.tab {
  flex: 1; font-family: var(--font); font-size: 13px; font-weight: 700; cursor: pointer;
  background: var(--white); color: var(--text); border: var(--border-thin);
  border-radius: var(--radius-sm); padding: 7px 4px;
}
.tab.is-active { background: var(--text); color: var(--primary); box-shadow: 2px 2px 0 rgba(28,41,60,.35); }
.prompt-box {
  font-family: var(--mono); font-size: 13px; line-height: 1.65;
  background: var(--white); border: var(--border); border-radius: var(--radius);
  box-shadow: inset 3px 3px 0 rgba(28,41,60,.08);
  padding: 14px; max-height: 320px; overflow-y: auto; white-space: pre-wrap;
  word-break: break-word;
}
.btn-row { display: flex; gap: 10px; margin-top: 14px; }
.btn-row .btn { flex: 1; }
.err { margin-top: 10px; font-size: 13px; font-weight: 700; color: var(--danger); background: var(--white); border: 2px solid var(--danger); border-radius: var(--radius-sm); padding: 6px 10px; }

/* ---------- 概览 ---------- */
.count-badge {
  font-family: var(--mono); font-size: 13px; font-weight: 700;
  background: var(--primary); border: 2px solid var(--text); border-radius: 999px;
  min-width: 30px; text-align: center; padding: 1px 8px;
}
.overview { list-style: none; display: flex; flex-direction: column; gap: 8px; max-height: 240px; overflow-y: auto; }
.overview li { display: flex; gap: 10px; font-size: 13px; align-items: baseline; border-bottom: 1px dashed rgba(28,41,60,.25); padding-bottom: 6px; }
.overview li b { flex: 0 0 76px; font-family: var(--mono); font-size: 12px; color: var(--secondary); }
.overview li span { font-weight: 600; }
.overview-empty, .overview li.overview-empty { color: rgba(28,41,60,.55); font-size: 13px; border: none; }

/* ---------- 历史 ---------- */
.history { display: flex; flex-direction: column; gap: 10px; max-height: 260px; overflow-y: auto; }
.history-item {
  border: var(--border-thin); border-radius: var(--radius); background: var(--surface);
  padding: 10px 12px; font-size: 12.5px; cursor: pointer; box-shadow: 2px 2px 0 var(--text);
}
.history-item:hover { background: var(--primary); }
.history-item time { display: block; font-family: var(--mono); font-size: 11px; color: rgba(28,41,60,.6); margin-bottom: 4px; }
.history-item p { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- 技巧 ---------- */
.card-tips { background: var(--secondary); color: #fff; }
.card-tips h2 { color: #fff; }
.tips { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.tips li { font-size: 13.5px; padding-left: 22px; position: relative; }
.tips li::before { content: "→"; position: absolute; left: 0; color: var(--primary); font-weight: 800; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  background: var(--success); color: #fff; font-weight: 800; font-size: 14px;
  border: var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 10px 22px; z-index: 99;
}

/* ---------- 页脚 ---------- */
.footer { border-top: var(--border); background: var(--text); color: var(--surface); padding: 28px 0; }
.footer p { font-size: 14px; }
.footer .muted { font-size: 12.5px; opacity: .7; margin-top: 6px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1023px) {
  .layout { grid-template-columns: 1fr; }
  .output-sticky { position: static; }
  .hero h1 { font-size: 35px; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .hero { padding: 36px 0 28px; }
  .hero h1 { font-size: 27px; }
  .lead { font-size: 15px; }
  .hero-actions .btn { width: 100%; }
  .stat { min-width: 0; flex: 1; padding: 10px 12px; }
  .stat b { font-size: 21px; }
  .card { padding: 16px; box-shadow: var(--shadow-sm); }
  .card h2 { font-size: 17px; }
  .random-bar { grid-template-columns: 1fr; gap: 10px; }
  .rb-text b { font-size: 15px; }
  .adv-grid { grid-template-columns: 1fr; }
  .preset-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .search-box input { width: 100%; }
  .card-head { width: 100%; }
  .tabs .tab { font-size: 12px; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .preset { transition: none; }
}