/* ============================================================
   心绘 ArtMind — 无障碍优先样式
   设计要点：WCAG AA 对比度、可缩放字号、高对比主题、清晰焦点环
   ============================================================ */

:root {
  --fontscale: 1;
  --bg: #0f1226;
  --bg-2: #171b3a;
  --card: #1e2347;
  --card-2: #252b56;
  --text: #f3f5ff;
  --text-dim: #b9c0e6;
  --primary: #7c5cff;
  --primary-ink: #ffffff;
  --accent: #2ee6c5;
  --warn: #ffb020;
  --danger: #ff5d6c;
  --ring: #2ee6c5;
  --radius: 16px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

/* 高对比主题：纯黑底 + 高亮度文字/边框，对比度远超 AA */
body[data-contrast="high"] {
  --bg: #000000;
  --bg-2: #000000;
  --card: #000000;
  --card-2: #0a0a0a;
  --text: #ffffff;
  --text-dim: #ffff00;
  --primary: #00e0ff;
  --primary-ink: #000000;
  --accent: #00ff90;
  --ring: #ffff00;
}

* { box-sizing: border-box; }

html { font-size: calc(100% * var(--fontscale)); }

body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(1200px 800px at 80% -10%, var(--bg-2), var(--bg)) fixed;
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body[data-contrast="high"] { background: #000; }

/* 仅读屏可见 */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* 跳转链接 */
.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 100;
  background: var(--primary); color: var(--primary-ink);
  padding: 10px 16px; border-radius: 10px; font-weight: 700;
  transition: top .2s ease; text-decoration: none;
}
.skip-link:focus { top: 12px; }

/* 全局焦点环：3px 高可见 */
:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------------- 顶部工具条 ---------------- */
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 20px;
  background: rgba(20, 24, 56, .85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  position: sticky; top: 0; z-index: 30;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 1.25rem; font-weight: 700; }
.brand-mark { font-size: 1.6rem; color: var(--accent); }
.brand-name small { color: var(--text-dim); font-weight: 500; font-size: .8rem; letter-spacing: .08em; }

.a11y-tools { display: flex; gap: 8px; margin-left: auto; flex-wrap: wrap; }
.tool {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--card); color: var(--text);
  border: 2px solid transparent; border-radius: 12px;
  padding: 8px 12px; font-size: .9rem; font-weight: 600; cursor: pointer;
  min-height: 44px; /* 触控目标 ≥44px */
}
.tool:hover { border-color: var(--primary); }
.tool[aria-pressed="true"] { background: var(--primary); color: var(--primary-ink); }
.tool-text { white-space: nowrap; }

.profile { display: flex; align-items: center; gap: 10px; }
#role-select {
  background: var(--card); color: var(--text); border: 2px solid rgba(255,255,255,.15);
  border-radius: 12px; padding: 10px 12px; font-size: .95rem; min-height: 44px;
}
.plan-badge { padding: 6px 12px; border-radius: 999px; font-weight: 700; font-size: .85rem; }
.plan-free { background: rgba(255,255,255,.12); color: var(--text-dim); }
.plan-pro { background: linear-gradient(90deg, var(--primary), var(--accent)); color: #08122a; }

/* ---------------- 布局 ---------------- */
.layout { display: grid; grid-template-columns: 248px 1fr; min-height: calc(100vh - 70px); }
.sidenav { padding: 18px 12px; border-right: 1px solid rgba(255,255,255,.08); }
.sidenav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.navbtn {
  width: 100%; text-align: left; display: flex; align-items: center; gap: 12px;
  background: transparent; color: var(--text); border: 2px solid transparent;
  border-radius: 12px; padding: 14px 14px; font-size: 1.02rem; font-weight: 600; cursor: pointer;
  min-height: 48px;
}
.navbtn span { font-size: 1.25rem; }
.navbtn:hover { background: var(--card); }
.navbtn.active { background: var(--card); border-color: var(--primary); }

.voice-hint {
  margin-top: 20px; background: var(--card); border-radius: 14px; padding: 14px;
  border: 1px dashed var(--accent); font-size: .9rem;
}
.voice-hint ul { padding-left: 18px; color: var(--text-dim); }

.content { padding: 26px 30px 120px; }
.view { animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---------------- 通用组件 ---------------- */
.view-head { margin-bottom: 18px; }
.view-head h1 { font-size: 1.7rem; margin: 0 0 6px; }
.view-head p { color: var(--text-dim); margin: 0; max-width: 70ch; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
  background: var(--card); border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius); padding: 18px;
}
.card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.card p { color: var(--text-dim); margin: 0 0 12px; }

.tag { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: .78rem; font-weight: 700; }
.tag-blind { background: rgba(124,92,255,.25); color: #cdbcff; }
.tag-deaf { background: rgba(46,230,197,.2); color: #9af3e3; }
.tag-pro { background: rgba(255,176,32,.2); color: #ffd591; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  border: 2px solid transparent; border-radius: 12px; padding: 12px 18px;
  font-size: 1rem; font-weight: 700; cursor: pointer; min-height: 48px; text-decoration: none;
}
.btn-primary { background: var(--primary); color: var(--primary-ink); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--text); border-color: rgba(255,255,255,.25); }
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.locked { position: relative; }
.lock-pill {
  position: absolute; top: 12px; right: 12px; background: var(--warn); color: #2a1a00;
  font-size: .75rem; font-weight: 800; padding: 4px 10px; border-radius: 999px;
}

/* 创作工坊画布 */
.canvas-wrap { display: grid; grid-template-columns: 1fr 320px; gap: 16px; }
.canvas {
  min-height: 320px; border-radius: var(--radius); display: grid; place-items: center;
  background: linear-gradient(135deg, #2a2f63, #161a3b); border: 1px solid rgba(255,255,255,.1);
  text-align: center; padding: 24px; color: var(--text-dim);
}
.viz-bars { display: flex; gap: 6px; align-items: flex-end; height: 160px; }
.viz-bars span { width: 14px; background: linear-gradient(var(--accent), var(--primary)); border-radius: 6px 6px 0 0; }

.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 700; margin-bottom: 6px; }
.field textarea, .field input {
  width: 100%; background: var(--bg-2); color: var(--text);
  border: 2px solid rgba(255,255,255,.15); border-radius: 12px; padding: 12px; font-size: 1rem; font-family: inherit;
}
.quota {
  font-size: .88rem; color: var(--text-dim); margin-top: 8px;
  display: flex; align-items: center; gap: 8px;
}

/* 任务/进度 */
.task { display: flex; align-items: center; gap: 14px; }
.task input[type="checkbox"] { width: 26px; height: 26px; accent-color: var(--accent); }
.progress { height: 14px; background: var(--bg-2); border-radius: 999px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--primary)); }

/* 社区 */
.post { border-left: 4px solid var(--primary); }
.post.flagged { border-left-color: var(--danger); }
.post-meta { font-size: .82rem; color: var(--text-dim); display: flex; gap: 10px; align-items: center; }
.mod-note { font-size: .82rem; color: var(--warn); margin-top: 8px; }

/* 订阅 */
.plans { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.plan { border: 2px solid rgba(255,255,255,.12); border-radius: var(--radius); padding: 22px; background: var(--card); }
.plan.featured { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(46,230,197,.18); }
.plan .price { font-size: 2rem; font-weight: 800; }
.plan ul { list-style: none; padding: 0; margin: 14px 0; }
.plan li { padding: 6px 0; border-bottom: 1px dashed rgba(255,255,255,.1); color: var(--text-dim); }

/* 字幕条 */
.caption-bar {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 18px;
  max-width: min(900px, 92vw); width: max-content;
  background: rgba(0,0,0,.88); color: #fff; border: 2px solid var(--accent);
  border-radius: 14px; padding: 12px 18px; font-size: 1.05rem; font-weight: 600;
  display: flex; gap: 10px; align-items: center; z-index: 40;
}
.caption-bar[hidden] { display: none; }

/* 弹窗 */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.6); display: grid; place-items: center; z-index: 60;
  padding: 20px;
}
.modal[hidden] { display: none; }
.modal-card { background: var(--card); border-radius: var(--radius); padding: 26px; max-width: 460px; width: 100%; border: 2px solid var(--primary); }
.modal-card h2 { margin-top: 0; }
.modal-actions { display: flex; gap: 12px; margin-top: 18px; }

/* 响应式 */
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidenav { border-right: none; border-bottom: 1px solid rgba(255,255,255,.08); }
  .sidenav ul { flex-direction: row; overflow-x: auto; }
  .canvas-wrap { grid-template-columns: 1fr; }
  .tool-text { display: none; }
}

/* 尊重用户的减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}