/* ==========================================================================
   作品集门户 · 主题与布局
   两套主题通过 [data-theme] 切换，全部由 CSS 变量驱动
   ========================================================================== */

/* ---------- 主题 1：暗色霓虹（默认） ---------- */
:root,
[data-theme="neon"] {
  --bg: #0f0f1a;
  --bg-2: #1a1a2e;
  --bg-glow-1: rgba(99, 102, 241, 0.18);
  --bg-glow-2: rgba(6, 182, 212, 0.14);

  --text: #e6e6f5;
  --text-strong: #ffffff;
  --text-muted: rgba(230, 230, 245, 0.55);
  --text-faint: rgba(230, 230, 245, 0.32);

  --card-bg: rgba(255, 255, 255, 0.05);
  --card-bg-hover: rgba(255, 255, 255, 0.1);
  --card-border: rgba(255, 255, 255, 0.1);
  --card-border-hover: rgba(124, 77, 255, 0.55);

  --accent: #6366f1;
  --accent-2: #06b6d4;
  --accent-text: #ffffff;
  --chip-bg: rgba(255, 255, 255, 0.07);
  --chip-border: rgba(255, 255, 255, 0.14);

  --header-bg: rgba(15, 15, 26, 0.72);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 0 40px rgba(124, 77, 255, 0.35);
  --radius: 18px;

  /* 标题渐变：星云青 → 星核紫 → 极光粉 */
  --title-c1: #7dd3fc;
  --title-c2: #a78bfa;
  --title-c3: #f0abfc;
  --title-glow: rgba(139, 92, 246, 0.55);
  --title-glow-soft: rgba(56, 189, 248, 0.32);
}

/* ---------- 主题 2：门户橙黄（4399 风） ---------- */
[data-theme="portal"] {
  --bg: #fff8ec;
  --bg-2: #ffefd2;
  --bg-glow-1: rgba(255, 107, 0, 0.14);
  --bg-glow-2: rgba(255, 179, 0, 0.16);

  --text: #4a3722;
  --text-strong: #2b1d0e;
  --text-muted: rgba(74, 55, 34, 0.65);
  --text-faint: rgba(74, 55, 34, 0.45);

  --card-bg: #ffffff;
  --card-bg-hover: #ffffff;
  --card-border: #ffe0b2;
  --card-border-hover: #ff6b00;

  --accent: #ff6b00;
  --accent-2: #ffb300;
  --accent-text: #ffffff;
  --chip-bg: rgba(255, 107, 0, 0.1);
  --chip-border: rgba(255, 107, 0, 0.25);

  --header-bg: rgba(255, 248, 236, 0.9);
  --shadow: 0 6px 18px rgba(255, 140, 0, 0.16);
  --shadow-hover: 0 14px 30px rgba(255, 107, 0, 0.3);
  --radius: 14px;

  /* 标题渐变：橙 → 金 → 暖红 */
  --title-c1: #ff6b00;
  --title-c2: #ffb300;
  --title-c3: #ff3d6e;
  --title-glow: rgba(255, 107, 0, 0.28);
  --title-glow-soft: rgba(255, 179, 0, 0.22);
}

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

html,
body {
  min-height: 100%;
}

body {
  font-family: "Poppins", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(circle at 12% 0%, var(--bg-glow-1), transparent 45%),
    radial-gradient(circle at 88% 8%, var(--bg-glow-2), transparent 42%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 45%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ---------- 顶部栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--card-border);
}

.topbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 19px;
  color: var(--accent-text);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  animation: corePulse 3.6s ease-in-out infinite;
}

/* 星核呼吸：光晕明暗脉动 */
@keyframes corePulse {
  0%,
  100% {
    box-shadow: 0 0 14px var(--title-glow), 0 0 30px var(--title-glow-soft);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 24px var(--title-glow), 0 0 54px var(--title-glow-soft);
    transform: scale(1.045);
  }
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(
    100deg,
    var(--title-c1) 0%,
    var(--title-c2) 30%,
    var(--title-c3) 55%,
    var(--title-c2) 78%,
    var(--title-c1) 100%
  );
  background-size: 260% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: titleFlow 7s linear infinite;
}

@keyframes titleFlow {
  to {
    background-position: 260% center;
  }
}

.brand-sub {
  font-size: 11px;
  color: var(--text-faint);
}

.search {
  flex: 1;
  min-width: 0;
  position: relative;
  display: flex;
  align-items: center;
}

.search input {
  width: 100%;
  height: 40px;
  padding: 0 14px 0 38px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}

.search input::placeholder {
  color: var(--text-faint);
}

.search input:focus {
  border-color: var(--accent);
  background: var(--card-bg-hover);
}

.search-icon {
  position: absolute;
  left: 13px;
  font-size: 14px;
  color: var(--text-faint);
  pointer-events: none;
}

.theme-btn {
  flex-shrink: 0;
  height: 40px;
  padding: 0 15px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.18s, border-color 0.18s, background 0.18s;
}

.theme-btn:hover {
  transform: translateY(-1px);
  border-color: var(--card-border-hover);
  background: var(--card-bg-hover);
}

/* ---------- 主体 ---------- */
.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}

.hero {
  padding: 6px 0 22px;
}

.hero h1 {
  font-size: clamp(28px, 5.4vw, 44px);
  font-weight: 800;
  letter-spacing: 1.5px;
  line-height: 1.2;
  background: linear-gradient(
    100deg,
    var(--title-c1) 0%,
    var(--title-c2) 28%,
    var(--title-c3) 50%,
    var(--title-c2) 72%,
    var(--title-c1) 100%
  );
  background-size: 260% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: titleFlow 7s linear infinite;
  filter: drop-shadow(0 0 22px var(--title-glow)) drop-shadow(0 0 46px var(--title-glow-soft));
}

.hero p {
  margin-top: 10px;
  font-size: 14px;
  letter-spacing: 1.2px;
  color: var(--text-muted);
}

/* ---------- 分类筛选 ---------- */
.filters {
  display: flex;
  gap: 9px;
  overflow-x: auto;
  padding: 4px 0 16px;
  scrollbar-width: none;
}

.filters::-webkit-scrollbar {
  display: none;
}

.chip {
  flex-shrink: 0;
  padding: 8px 17px;
  border-radius: 999px;
  border: 1px solid var(--chip-border);
  background: var(--chip-bg);
  color: var(--text-muted);
  font-size: 13.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.chip:hover {
  color: var(--text-strong);
  border-color: var(--card-border-hover);
}

.chip.active {
  color: var(--accent-text);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  box-shadow: var(--shadow-hover);
}

/* ---------- 作品网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

@media (max-width: 980px) {
  .grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 13px;
  }

  .brand-sub,
  .theme-label {
    display: none;
  }
}

/* ---------- 作品卡片 ---------- */
.card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease,
    background 0.25s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--card-border-hover);
  background: var(--card-bg-hover);
  box-shadow: var(--shadow-hover);
}

.card-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  display: grid;
  place-items: center;
  font-size: clamp(38px, 8vw, 62px);
  color: rgba(255, 255, 255, 0.94);
  text-shadow: 0 4px 22px rgba(0, 0, 0, 0.35);
  user-select: none;
}

.card-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: rgba(0, 0, 0, 0.34);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.card-body {
  padding: 13px 15px 16px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  flex: 1;
}

/* 作品名：科幻感渐变字（每部作品一套独立配色，见文件末尾配色表） */
.card-title {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.6px;
  line-height: 1.3;
}

[data-theme="neon"] .card-title {
  background: linear-gradient(
    100deg var(--t-c1, #7dd3fc) 0%,
    var(--t-c2, #a78bfa) 32%,
    var(--t-c3, #f0abfc) 52%,
    var(--t-c2, #a78bfa) 74%,
    var(--t-c1, #7dd3fc) 100%
  );
  background-size: 240% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  filter: drop-shadow(0 0 10px var(--t-glow, rgba(139, 92, 246, 0.5)))
    drop-shadow(0 0 22px var(--t-glow-soft, rgba(56, 189, 248, 0.28)));
}

[data-theme="portal"] .card-title {
  background: linear-gradient(100deg, #ff6b00 0%, #ffb300 45%, #ff3d6e 100%);
  background-size: 240% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  filter: drop-shadow(0 1px 6px rgba(255, 107, 0, 0.28));
}

/* 进场后缓慢流光；悬停时提速并加亮 */
.card-title {
  animation: titleFlow 9s linear infinite;
}

.card:hover .card-title {
  animation-duration: 3.2s;
  filter: drop-shadow(0 0 14px var(--t-glow, rgba(139, 92, 246, 0.6)))
    drop-shadow(0 0 30px var(--t-glow-soft, rgba(56, 189, 248, 0.34)));
}

/* ===== 每部作品一套科幻配色（新增作品时按 id 追加一条即可） ===== */

/* 数独星球：星云青 → 星核紫 → 极光粉 */
.card[data-id="sudoku"] .card-title {
  --t-c1: #7dd3fc;
  --t-c2: #a78bfa;
  --t-c3: #f0abfc;
  --t-glow: rgba(139, 92, 246, 0.55);
  --t-glow-soft: rgba(56, 189, 248, 0.3);
}

/* 俄罗斯方块：等离子青 → 电光紫 → 霓虹蓝 */
.card[data-id="tetris"] .card-title {
  --t-c1: #00e5ff;
  --t-c2: #7c4dff;
  --t-c3: #4d8bff;
  --t-glow: rgba(124, 77, 255, 0.6);
  --t-glow-soft: rgba(0, 229, 255, 0.32);
}

.card-desc {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text-muted);
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.tag {
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
}

/* ---------- 空状态 / 页脚 ---------- */
.empty {
  grid-column: 1 / -1;
  padding: 64px 20px;
  text-align: center;
  color: var(--text-faint);
  font-size: 14px;
}

.footer {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--card-border);
  text-align: center;
  font-size: 12.5px;
  color: var(--text-faint);
}

/* ---------- 入场动画 ---------- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.card {
  animation: fadeUp 0.4s ease both;
}

/* ---------- 降级与无障碍 ---------- */

/* 不支持 background-clip:text 的浏览器：退回纯色，避免标题消失 */
@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  .hero h1,
  .brand-name,
  .card-title {
    background: none;
    -webkit-text-fill-color: currentColor;
    color: var(--text-strong);
  }
}

/* 尊重系统「减少动态效果」偏好 */
@media (prefers-reduced-motion: reduce) {
  .hero h1,
  .brand-name,
  .brand-mark,
  .card,
  .card-title {
    animation: none !important;
  }
}