/* ============================================================
   MBTI 测试站 · Premium Styles
   主题：light / dark / system（CSS 变量驱动）
   动画仅使用 transform / opacity / filter（GPU 友好）
   ============================================================ */

:root {
  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --accent-soft: rgba(99, 102, 241, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-soft: 0 20px 60px -20px rgba(20, 22, 40, 0.25);
  --maxw: 720px;
  --font: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, 'Helvetica Neue', sans-serif;
}

/* 浅色 */
:root[data-theme='light'] {
  --bg: #f4f5fb;
  --bg-2: #eef0f8;
  --text: #1a1c2b;
  --text-soft: #5b5f73;
  --text-faint: #8a8fa3;
  --surface: rgba(255, 255, 255, 0.62);
  --surface-border: rgba(255, 255, 255, 0.7);
  --inner-line: inset 0 1px 0 rgba(255, 255, 255, 0.6);
  --blob-1: rgba(99, 102, 241, 0.35);
  --blob-2: rgba(139, 92, 246, 0.30);
  --blob-3: rgba(56, 189, 248, 0.28);
  --opt-bg: rgba(255, 255, 255, 0.55);
  --opt-border: rgba(20, 22, 40, 0.10);
  --tag-bg: rgba(99, 102, 241, 0.10);
  --tag-text: #4f46e5;
}

/* 深色 */
:root[data-theme='dark'] {
  --bg: #0c0d14;
  --bg-2: #0a0b11;
  --text: #f2f3f8;
  --text-soft: #b6b9cc;
  --text-faint: #777b90;
  --surface: rgba(28, 30, 46, 0.55);
  --surface-border: rgba(255, 255, 255, 0.08);
  --inner-line: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  --blob-1: rgba(99, 102, 241, 0.45);
  --blob-2: rgba(139, 92, 246, 0.40);
  --blob-3: rgba(56, 189, 248, 0.30);
  --opt-bg: rgba(255, 255, 255, 0.04);
  --opt-border: rgba(255, 255, 255, 0.10);
  --tag-bg: rgba(129, 132, 255, 0.14);
  --tag-text: #b3b6ff;
  --shadow-soft: 0 24px 70px -24px rgba(0, 0, 0, 0.7);
}

/* 跟随系统 */
:root[data-theme='system'] {
  --bg: #f4f5fb;
  --bg-2: #eef0f8;
  --text: #1a1c2b;
  --text-soft: #5b5f73;
  --text-faint: #8a8fa3;
  --surface: rgba(255, 255, 255, 0.62);
  --surface-border: rgba(255, 255, 255, 0.7);
  --inner-line: inset 0 1px 0 rgba(255, 255, 255, 0.6);
  --blob-1: rgba(99, 102, 241, 0.35);
  --blob-2: rgba(139, 92, 246, 0.30);
  --blob-3: rgba(56, 189, 248, 0.28);
  --opt-bg: rgba(255, 255, 255, 0.55);
  --opt-border: rgba(20, 22, 40, 0.10);
  --tag-bg: rgba(99, 102, 241, 0.10);
  --tag-text: #4f46e5;
}
@media (prefers-color-scheme: dark) {
  :root[data-theme='system'] {
    --bg: #0c0d14;
    --bg-2: #0a0b11;
    --text: #f2f3f8;
    --text-soft: #b6b9cc;
    --text-faint: #777b90;
    --surface: rgba(28, 30, 46, 0.55);
    --surface-border: rgba(255, 255, 255, 0.08);
    --inner-line: inset 0 1px 0 rgba(255, 255, 255, 0.06);
    --blob-1: rgba(99, 102, 241, 0.45);
    --blob-2: rgba(139, 92, 246, 0.40);
    --blob-3: rgba(56, 189, 248, 0.30);
    --opt-bg: rgba(255, 255, 255, 0.04);
    --opt-border: rgba(255, 255, 255, 0.10);
    --tag-bg: rgba(129, 132, 255, 0.14);
    --tag-text: #b3b6ff;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
  -webkit-font-smoothing: antialiased;
}

/* ---------- 动态光斑背景 ---------- */
.bg-blobs {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  filter: blur(70px);
}
.blob {
  position: absolute;
  width: 46vmax;
  height: 46vmax;
  border-radius: 50%;
  opacity: 0.9;
  will-change: transform;
}
.blob-1 { background: var(--blob-1); top: -14vmax; left: -10vmax; animation: float1 18s ease-in-out infinite; }
.blob-2 { background: var(--blob-2); bottom: -18vmax; right: -8vmax; animation: float2 22s ease-in-out infinite; }
.blob-3 { background: var(--blob-3); top: 30%; left: 40%; width: 30vmax; height: 30vmax; animation: float3 26s ease-in-out infinite; }

@keyframes float1 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(6vmax, 4vmax) scale(1.08); } }
@keyframes float2 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-5vmax, -3vmax) scale(1.12); } }
@keyframes float3 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-4vmax, 5vmax) scale(0.92); } }

/* ---------- 顶栏 ---------- */
.topbar {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(16px, 4vw, 40px);
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 18px -4px var(--accent);
}
.brand-name { font-weight: 700; letter-spacing: 0.2px; font-size: 1.05rem; }
.brand-dot { color: var(--accent); margin: 0 2px; }

.theme-switch {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}
.theme-btn {
  display: grid; place-items: center;
  width: 34px; height: 34px;
  border: none; border-radius: 10px;
  background: transparent; color: var(--text-soft);
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), transform 0.2s var(--ease);
}
.theme-btn:hover { color: var(--text); transform: translateY(-1px); }
.theme-btn.is-active {
  background: var(--accent-soft);
  color: var(--accent);
}

/* ---------- 舞台与屏幕 ---------- */
.stage {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px clamp(16px, 4vw, 40px) 40px;
  width: 100%;
}
.screen {
  width: 100%;
  max-width: var(--maxw);
  animation: screenIn 0.5s var(--ease);
}
.screen[hidden] { display: none; }
@keyframes screenIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }

/* 玻璃拟态 */
.glass {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft), var(--inner-line);
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
}

/* ---------- 首页 ---------- */
.intro-card { padding: clamp(28px, 5vw, 52px); text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: 0.72rem; letter-spacing: 0.22em; font-weight: 600;
  color: var(--accent);
  background: var(--tag-bg);
  padding: 6px 14px; border-radius: 999px;
  margin: 0 0 18px;
}
.intro-title {
  font-size: clamp(2rem, 6vw, 3.2rem);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.intro-sub {
  color: var(--text-soft);
  font-size: clamp(0.98rem, 2.2vw, 1.08rem);
  line-height: 1.7;
  max-width: 56ch;
  margin: 0 auto 26px;
}
.intro-points {
  list-style: none; padding: 0; margin: 0 auto 30px;
  display: flex; flex-direction: column; gap: 12px;
  max-width: 320px; text-align: left;
}
.intro-points li { display: flex; align-items: center; gap: 12px; color: var(--text-soft); font-size: 0.98rem; }
.intro-points .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  flex: none;
}
.intro-note { margin: 18px 0 0; font-size: 0.8rem; color: var(--text-faint); }

/* ---------- 按钮 ---------- */
.btn {
  font-family: inherit;
  font-size: 1rem; font-weight: 600;
  border: none; border-radius: 14px;
  padding: 14px 30px;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.25s var(--ease), opacity 0.2s, background 0.25s;
}
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 14px 34px -10px var(--accent);
}
.btn-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 20px 40px -12px var(--accent); }
.btn-primary:active:not(:disabled) { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; box-shadow: none; }
.btn-ghost {
  color: var(--text-soft);
  background: var(--opt-bg);
  border: 1px solid var(--opt-border);
}
.btn-ghost:hover:not(:disabled) { color: var(--text); transform: translateY(-1px); }
.btn-ghost:disabled { opacity: 0.4; cursor: not-allowed; }
.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

/* ---------- 测试屏 ---------- */
.test-card { padding: clamp(24px, 4vw, 40px); }
.test-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 14px; }
.test-counter { font-weight: 700; font-size: 0.95rem; }
.test-dim { font-size: 0.8rem; color: var(--text-faint); font-weight: 600; letter-spacing: 0.04em; }

.progress {
  height: 8px; border-radius: 999px;
  background: var(--opt-border);
  overflow: hidden;
  margin-bottom: 30px;
}
.progress-fill {
  display: block; height: 100%; width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.45s var(--ease);
}

.test-question {
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  font-weight: 600; line-height: 1.5;
  margin: 0 0 30px;
  min-height: 3.2em;
}

.scale {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-bottom: 32px;
}
.scale-opt {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 16px 8px;
  border-radius: var(--radius-md);
  background: var(--opt-bg);
  border: 1px solid var(--opt-border);
  color: var(--text-soft);
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.2s var(--ease), border-color 0.2s, background 0.2s, color 0.2s;
}
.scale-opt:hover { transform: translateY(-2px); color: var(--text); }
.scale-num {
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 700; font-size: 1.05rem;
  background: var(--tag-bg); color: var(--tag-text);
}
.scale-label { font-size: 0.78rem; text-align: center; line-height: 1.3; }
.scale-opt[aria-checked='true'] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
  transform: translateY(-2px);
}
.scale-opt[aria-checked='true'] .scale-num { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.scale-opt:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.test-actions { display: flex; justify-content: space-between; gap: 12px; }

/* ---------- 结果屏 ---------- */
.result-card { padding: clamp(26px, 5vw, 48px); text-align: center; }
.result-eyebrow { margin: 0 0 6px; color: var(--text-faint); font-size: 0.85rem; letter-spacing: 0.12em; text-transform: uppercase; }
.result-type {
  font-size: clamp(3rem, 12vw, 5rem);
  font-weight: 800; letter-spacing: 0.04em;
  margin: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.result-name { font-size: 1.3rem; font-weight: 700; margin: 10px 0 2px; }
.result-tagline { color: var(--accent); font-weight: 600; margin: 0 0 20px; font-size: 0.95rem; }
.result-desc { color: var(--text-soft); line-height: 1.75; max-width: 58ch; margin: 0 auto 30px; font-size: 1rem; }

.dims { display: flex; flex-direction: column; gap: 16px; margin: 0 auto 30px; max-width: 560px; text-align: left; }
.dim-row { display: grid; grid-template-columns: 64px 1fr 64px; align-items: center; gap: 12px; }
.dim-label { font-weight: 700; font-size: 0.92rem; }
.dim-track {
  height: 10px; border-radius: 999px;
  background: var(--opt-border);
  position: relative; overflow: hidden;
}
.dim-fill {
  position: absolute; left: 0; top: 0; height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  width: 0;
  transition: width 0.9s var(--ease);
}
.dim-fill.flip { left: auto; right: 0; }
.dim-pct { font-size: 0.82rem; color: var(--text-faint); font-weight: 600; text-align: right; }

.result-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 22px; text-align: left; }
.result-field { text-align: left; margin-bottom: 30px; }
.col-title { font-size: 0.95rem; font-weight: 700; margin: 0 0 12px; }
.tag-list { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tag-list li {
  background: var(--tag-bg); color: var(--tag-text);
  padding: 7px 14px; border-radius: 999px;
  font-size: 0.88rem; font-weight: 600;
}
.tag-list-soft li { background: var(--opt-bg); color: var(--text-soft); border: 1px solid var(--opt-border); }

.result-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.copy-hint { min-height: 1.2em; margin: 14px 0 0; font-size: 0.85rem; color: var(--accent); font-weight: 600; }

/* ---------- 分析中 ---------- */
.analyzing {
  position: fixed; inset: 0; z-index: 5;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(8px);
  color: var(--text-soft); font-weight: 600;
}
.analyzing[hidden] { display: none; }
.spinner {
  width: 44px; height: 44px; border-radius: 50%;
  border: 4px solid var(--opt-border);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 页脚 ---------- */
.footnote {
  position: relative; z-index: 2;
  text-align: center; padding: 18px;
  color: var(--text-faint); font-size: 0.8rem;
}

/* ---------- 响应式 ---------- */
@media (max-width: 560px) {
  .scale { grid-template-columns: repeat(5, 1fr); gap: 6px; }
  .scale-opt { padding: 12px 4px; }
  .scale-label { font-size: 0.66rem; }
  .scale-num { width: 28px; height: 28px; font-size: 0.9rem; }
  .test-actions { flex-direction: column-reverse; }
  .test-actions .btn { width: 100%; }
  .result-cols { grid-template-columns: 1fr; }
  .dim-label { font-size: 0.82rem; }
}

/* ---------- 无障碍：减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .blob { animation: none; }
}