/* ============================================================
   Windlume Design System (theme.css)
   Theme: "a flicker of light carried on the wind"
   wind (风) + lume (微光) → 青蓝的风 · 暖金的光
   ============================================================ */

:root {
  /* ---- 主色：风的青蓝 ---- */
  --sky-50:  #f0f9ff;
  --sky-100: #e0f2fe;
  --sky-200: #bae6fd;
  --sky-300: #7dd3fc;
  --sky-400: #38bdf8;
  --sky-500: #0ea5e9;
  --sky-600: #0284c7;
  --sky-700: #0369a1;
  --sky-900: #0c4a6e;

  /* ---- 辅色：微光的暖金 ---- */
  --gold-50:  #fffbeb;
  --gold-100: #fef3c7;
  --gold-200: #fde68a;
  --gold-300: #fcd34d;
  --gold-400: #fbbf24;
  --gold-500: #f59e0b;
  --gold-600: #d97706;

  /* ---- 点缀：暮色青 ---- */
  --teal-300: #5eead4;
  --teal-400: #2dd4bf;
  --teal-500: #14b8a6;
  --teal-700: #0f766e;

  /* ---- 兼容旧变量名（映射到新主色，避免大改）---- */
  --violet-50:  var(--sky-50);
  --violet-100: var(--sky-100);
  --violet-200: var(--sky-200);
  --violet-300: var(--sky-300);
  --violet-400: var(--sky-400);
  --violet-500: var(--sky-500);
  --violet-600: var(--sky-600);
  --violet-700: var(--sky-700);
  --violet-900: var(--sky-900);

  /* ---- 中性色（带一点冷调，呼应风）---- */
  --ink-900: #0f172a;
  --ink-700: #334155;
  --ink-600: #475569;
  --ink-500: #64748b;
  --ink-400: #94a3b8;
  --ink-300: #cbd5e1;
  --ink-200: #e2e8f0;
  --ink-100: #f1f5f9;

  /* ---- 圆角 ---- */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 18px;
  --r-xl: 24px;
  --r-pill: 999px;

  /* ---- 阴影（青色调）---- */
  --sh-xs: 0 2px 6px rgba(14, 165, 233, .07);
  --sh-sm: 0 4px 14px rgba(14, 165, 233, .09);
  --sh-md: 0 6px 20px rgba(14, 165, 233, .11);
  --sh-lg: 0 12px 34px rgba(14, 165, 233, .15);
  --sh-xl: 0 18px 46px rgba(14, 165, 233, .19);
  --sh-gold: 0 8px 24px rgba(245, 158, 11, .22);

  /* ---- 渐变 ---- */
  /* 背景：晨曦的风（青 → 淡金） */
  --bg-app: linear-gradient(158deg, #eff9ff 0%, #f0f9ff 32%, #fffbeb 68%, #fef9f3 100%);
  /* 主按钮：风与光 */
  --grad-primary: linear-gradient(135deg, #38bdf8 0%, #0ea5e9 55%, #f59e0b 145%);
  --grad-sat:     linear-gradient(135deg, #fdba74, #f97316);
  --grad-fast:    linear-gradient(135deg, #fcd34d, #f59e0b);
  --grad-math:    linear-gradient(135deg, #5eead4, #14b8a6);
  --grad-review:  linear-gradient(135deg, #7dd3fc, #0ea5e9);
  --grad-voron:   linear-gradient(135deg, #94a3b8, #64748b);
  --grad-gold:    linear-gradient(135deg, #fcd34d, #d97706);

  /* ---- 动效 ---- */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --t-fast: .16s;
  --t-mid: .26s;
  --t-slow: .42s;
}

/* ============================================================
   基础
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

body.wl {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg-app);
  background-attachment: fixed;
  color: var(--ink-700);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

/* ============================================================
   卡片
   ============================================================ */
.wl-card {
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(186, 230, 253, .6);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-md);
}

/* ============================================================
   按钮体系（主 / 次 / 文字）
   ============================================================ */
.wl-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 13px 24px;
  border: none;
  border-radius: var(--r-pill);
  font-family: inherit;
  font-size: 15.5px;
  font-weight: 650;
  letter-spacing: .1px;
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition: transform var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease),
              background-color var(--t-mid) var(--ease);
}

/* hover：一道光扫过（呼应 "lume"） */
.wl-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255,255,255,.5) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform .55s var(--ease);
  pointer-events: none;
}
.wl-btn:hover::after { transform: translateX(120%); }

.wl-btn:hover { transform: translateY(-2px); }
.wl-btn:active { transform: translateY(0) scale(.985); }
.wl-btn:focus-visible { outline: 3px solid var(--sky-300); outline-offset: 2px; }

/* 主按钮：风推着光走 */
.wl-btn.primary { background: var(--grad-primary); color: #fff; box-shadow: 0 6px 18px rgba(14,165,233,.30); }
.wl-btn.primary:hover { box-shadow: 0 12px 28px rgba(14,165,233,.38); }

.wl-btn.sat { background: var(--grad-sat); color: #fff; box-shadow: 0 6px 18px rgba(249,115,22,.28); }
.wl-btn.sat:hover { box-shadow: 0 12px 28px rgba(249,115,22,.36); }

.wl-btn.fast { background: var(--grad-fast); color: #7c2d12; box-shadow: var(--sh-gold); }
.wl-btn.fast:hover { box-shadow: 0 12px 28px rgba(245,158,11,.34); }

.wl-btn.review { background: var(--grad-review); color: #fff; box-shadow: 0 6px 18px rgba(14,165,233,.30); }
.wl-btn.review:hover { box-shadow: 0 12px 28px rgba(14,165,233,.38); }

/* 次按钮（描边） */
.wl-btn.ghost {
  background: #fff;
  color: var(--sky-700);
  border: 2px solid var(--sky-200);
  box-shadow: var(--sh-xs);
  padding: 10px 18px;
  font-size: 14px;
}
.wl-btn.ghost:hover {
  background: var(--sky-50);
  border-color: var(--sky-300);
  box-shadow: var(--sh-sm);
}
.wl-btn.ghost::after { display: none; }

/* 文字链接按钮 */
.wl-textbtn {
  display: inline-block;
  color: var(--sky-600);
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1.5px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.wl-textbtn:hover { color: var(--sky-700); border-bottom-color: var(--sky-300); }

/* ============================================================
   标签 / 徽章
   ============================================================ */
.wl-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 11px;
  border-radius: var(--r-pill);
  background: var(--sky-50);
  color: var(--sky-700);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .5px;
  text-transform: uppercase;
}
.wl-pill.gold { background: var(--gold-50); color: var(--gold-600); }

.wl-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  font-size: 13.5px;
  color: var(--ink-500);
}
.wl-meta b { color: var(--sky-700); font-weight: 750; }

/* ============================================================
   SVG 图标
   ============================================================ */
.wl-ico {
  width: 1.15em;
  height: 1.15em;
  flex: 0 0 auto;
  vertical-align: -.18em;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}
.wl-ico.solid { fill: currentColor; stroke: none; }

/* ============================================================
   动效：淡入 + 风动 + 光呼吸
   ============================================================ */
@keyframes wlFadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes wlFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
/* 风里的浮动（纯垂直位移 + GPU 加速，避免 rotate 造成的像素抖动） */
@keyframes wlFloat {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50%      { transform: translate3d(0, -6px, 0); }
}
@keyframes wlPulseGlow {
  0%, 100% { opacity: .5;  transform: scale(1); }
  50%      { opacity: .85; transform: scale(1.08); }
}
/* 光点闪烁（lume） */
@keyframes wlTwinkle {
  0%, 100% { opacity: .25; transform: scale(.85); }
  50%      { opacity: .9;  transform: scale(1.15); }
}

.wl-in   { animation: wlFadeUp var(--t-slow) var(--ease) both; }
.wl-in-d1 { animation-delay: .06s; }
.wl-in-d2 { animation-delay: .12s; }
.wl-in-d3 { animation-delay: .18s; }
.wl-in-d4 { animation-delay: .24s; }
.wl-in-d5 { animation-delay: .30s; }
.wl-in-d6 { animation-delay: .36s; }
.wl-in-d7 { animation-delay: .42s; }

/* 尊重「减少动态效果」偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001s !important;
    animation-delay: 0s !important;
    transition-duration: .001s !important;
  }
  .wl-btn:hover { transform: none; }
}