/* ==========================================================================
   GMI Cloud × WAIC 2026 — 打卡页面设计系统
   四层结构：材质底盘 / 呼吸节奏 / 空间纵深 / 组件规范
   ========================================================================== */

:root {
  /* ---- 色板 ---- */
  --bg: #060606;
  --bg-elevated: #0d0d0d;
  --accent: #DDEA4D;
  --accent-dim: rgba(221, 234, 77, 0.16);
  --accent-glow: rgba(221, 234, 77, 0.35);
  --text-primary: #F5F5F0;
  --text-secondary: rgba(245, 245, 240, 0.62);
  --text-muted: rgba(245, 245, 240, 0.38);
  --on-accent: #0a0a06;

  /* ---- 材质底盘：玻璃层 ---- */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-bg-strong: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.10);
  --glass-border-strong: rgba(255, 255, 255, 0.18);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.45), 0 1px 0 rgba(255, 255, 255, 0.04) inset;

  /* ---- 几何 / 密度 ---- */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --pad-sm: 10px;
  --pad-md: 16px;
  --pad-lg: 24px;

  /* ---- 动效节奏 ---- */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-snap: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 160ms;
  --dur-base: 320ms;
  --dur-slow: 640ms;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text-primary);
  position: relative;
  overflow-x: hidden;
}

.hidden { display: none !important; }

/* ==========================================================================
   空间纵深：3D / 粒子背景层
   ========================================================================== */

#scene-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.bg-gradient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 45% at 18% 8%, var(--accent-dim), transparent 60%),
    radial-gradient(55% 40% at 85% 92%, rgba(221, 234, 77, 0.08), transparent 65%),
    var(--bg);
}

/* ==========================================================================
   顶部 LOGO
   ========================================================================== */

.brand-mark {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: fade-drop var(--dur-slow) var(--ease-out) both;
}
.brand-mark img {
  height: 20px;
  width: auto;
  display: block;
}

/* ==========================================================================
   布局容器
   ========================================================================== */

.stage {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 76px 16px 40px;
}

.step {
  width: 100%;
  max-width: 420px;
  text-align: center;
}

.event-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(221, 234, 77, 0.28);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 18px;
}

.hint {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0 0 28px;
}

.hero-title {
  font-size: 25px;
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 8px;
  color: var(--text-primary);
}
.hero-sub {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 22px;
}
.accent-text {
  color: var(--accent);
  text-shadow: 0 0 18px var(--accent-glow);
}

/* ==========================================================================
   组件规范：滤镜 / 图框 选择卡片（两组互相独立）
   ========================================================================== */

.group-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: left;
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

.chip-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin-bottom: 18px;
}

.chip-card {
  appearance: none;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg-strong);
  border-radius: var(--radius-sm);
  padding: 7px 3px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-snap),
              border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
.chip-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.chip-card:active { transform: scale(0.96); }
.chip-card.is-selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 20px -8px var(--accent-glow);
  background: var(--accent-dim);
}

.chip-swatch {
  width: 100%;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
}
.chip-swatch-none {
  background: repeating-linear-gradient(45deg, #1a1a1a, #1a1a1a 4px, #0a0a0a 4px, #0a0a0a 8px);
}
.chip-swatch-white {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.4);
}
.chip-swatch-kawaii {
  background: linear-gradient(135deg, #2a2a24, #47472e);
}
.chip-swatch-pop {
  background-color: #0a0a0a;
  background-image: radial-gradient(var(--accent) 18%, transparent 20%);
  background-size: 10px 10px;
}
.chip-swatch-pixel {
  background:
    repeating-linear-gradient(90deg, #0a0a0a 0 6px, #141408 6px 12px),
    repeating-linear-gradient(0deg, transparent 0 6px, rgba(221,234,77,0.15) 6px 12px);
}
.chip-swatch-neon {
  background: linear-gradient(135deg, #060606, var(--accent));
}

.chip-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
}
.chip-sub {
  font-size: 9.5px;
  color: var(--text-muted);
  text-align: center;
}

#generate-btn {
  margin-bottom: 10px;
}
#generate-btn:disabled {
  background: var(--glass-bg-strong);
  color: var(--text-muted);
}

/* ==========================================================================
   材质底盘：玻璃卡片（组件规范 · Card）
   ========================================================================== */

.glass-panel {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  backdrop-filter: blur(22px) saturate(140%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  padding: var(--pad-lg) var(--pad-lg);
}

/* 隐私须知浮层 */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.6);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.overlay-card {
  max-width: 380px;
  text-align: center;
  animation: rise-in var(--dur-slow) var(--ease-out) both;
}
.overlay-card h2 {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 600;
  color: var(--text-primary);
}
.overlay-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0 0 22px;
}

/* ==========================================================================
   组件规范：Button
   ========================================================================== */

.btn {
  appearance: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-md);
  padding: 15px 22px;
  transition: transform var(--dur-fast) var(--ease-snap),
              box-shadow var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out),
              opacity var(--dur-fast) linear;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn-block { width: 100%; display: block; }

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover {
  box-shadow: 0 8px 28px -6px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--glass-bg-strong);
  color: var(--text-primary);
  border: 1px solid var(--glass-border-strong);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

label.btn { display: inline-block; }

/* ==========================================================================
   拍照入口
   ========================================================================== */

.capture-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.icon-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  margin-right: 8px;
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ==========================================================================
   预览 / canvas
   ========================================================================== */

#canvas {
  width: 100%;
  max-width: 360px;
  border-radius: var(--radius-md);
  background: #000;
  margin-bottom: 22px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.preview-actions {
  display: flex;
  gap: 12px;
}
.preview-actions .btn { flex: 1; }

/* ==========================================================================
   完成态
   ========================================================================== */

.done-title {
  font-size: 17px;
  font-weight: 600;
  margin: 0 0 22px;
}
.done-code-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0 0 6px;
}
.code-big {
  font-size: 46px;
  font-weight: 700;
  letter-spacing: 6px;
  color: var(--accent);
  text-shadow: 0 0 24px var(--accent-glow);
  margin: 6px 0 22px;
}
.done-tip {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 26px;
}

#download-btn {
  margin-bottom: 12px;
  text-decoration: none;
}

.error-text {
  font-size: 15px;
  color: #F1A7A7;
  margin: 0 0 20px;
}

/* ==========================================================================
   呼吸节奏：微交互 / 进场动效
   ========================================================================== */

@keyframes fade-drop {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.step.is-active {
  animation: rise-in var(--dur-slow) var(--ease-out) both;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}