/* 小忧的房间 —— 样式
   颜色全部走 CSS 变量，换主题只换变量，不动结构。 */

:root {
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 880px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --serif: "Songti SC", "Noto Serif SC", Georgia, serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background .5s ease, color .5s ease;
  overflow-x: hidden;
}

/* 背景光晕 */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .7;
  pointer-events: none;
  z-index: 0;
  transition: background .6s ease;
}
.orb-a { width: 46vw; height: 46vw; top: -14vw; left: -10vw; background: var(--orb-a); }
.orb-b { width: 40vw; height: 40vw; bottom: -16vw; right: -8vw; background: var(--orb-b); }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 16px;
  max-width: var(--maxw); margin: 0 auto;
  padding: 16px 22px;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 76%, transparent);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-weight: 700; font-size: 17px;
  color: var(--text); text-decoration: none;
}
.brand-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { transform: scale(1); opacity: 1; }
  50%     { transform: scale(.82); opacity: .65; }
}
.nav { display: flex; gap: 18px; margin-left: auto; flex-wrap: wrap; }
.nav a {
  color: var(--text-soft); text-decoration: none;
  font-size: 14px; transition: color .2s;
}
.nav a:hover { color: var(--accent); }

/* 主题切换器 */
.theme-picker { position: relative; }
.theme-btn {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel); color: var(--text);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 14px; font-size: 13px; font-family: inherit;
  cursor: pointer; transition: border-color .2s, transform .12s;
}
.theme-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.swatch {
  width: 14px; height: 14px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: 1px solid color-mix(in srgb, var(--text) 14%, transparent);
}
.theme-list {
  position: absolute; right: 0; top: calc(100% + 8px);
  margin: 0; padding: 8px; list-style: none;
  min-width: 230px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 32px color-mix(in srgb, var(--text) 14%, transparent);
  z-index: 30;
}
.theme-list li button {
  display: flex; align-items: center; gap: 10px; width: 100%;
  background: none; border: 0; cursor: pointer;
  padding: 9px 11px; border-radius: 9px;
  font-family: inherit; font-size: 13px; color: var(--text);
  text-align: left; transition: background .15s;
}
.theme-list li button:hover { background: var(--bg-2); }
.theme-list li button[aria-selected="true"] {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  font-weight: 700;
}
.theme-list .t-name { font-weight: inherit; }
.theme-list .t-desc { color: var(--text-soft); font-size: 11.5px; }

/* ---------- 主体 ---------- */
main { position: relative; z-index: 1; max-width: var(--maxw); margin: 0 auto; padding: 0 22px 60px; }

/* Hero */
.hero { padding: 62px 0 46px; text-align: center; }
.hero-avatar {
  width: 92px; height: 92px; margin: 0 auto 20px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 10px 28px color-mix(in srgb, var(--accent) 16%, transparent);
  animation: float 5s ease-in-out infinite;
}
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-7px)} }
.avatar-face { font-size: 26px; color: var(--accent); letter-spacing: 2px; }
.hero-title {
  margin: 0 0 12px; font-size: clamp(28px, 5.6vw, 46px); font-weight: 800;
  letter-spacing: -.5px;
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin: 0 0 22px; color: var(--text-soft); font-size: 15px; min-height: 1.75em; }
.hero-meta { display: flex; gap: 9px; justify-content: center; flex-wrap: wrap; }
.chip {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 999px; padding: 5px 13px;
  font-size: 12.5px; color: var(--text-soft);
}
.chip b { color: var(--accent); }

/* 章节 */
.section { margin-top: 54px; }
.section-title {
  display: flex; align-items: baseline; gap: 11px;
  font-size: 20px; margin: 0 0 20px; font-weight: 700;
}
.sec-idx {
  font-family: var(--serif);
  font-size: 13px; color: var(--accent); opacity: .8;
  letter-spacing: 1px;
}

/* 卡片 */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(232px, 1fr)); gap: 14px; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 21px;
  transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 46%, var(--line));
  box-shadow: 0 14px 30px color-mix(in srgb, var(--accent) 12%, transparent);
}
.card h3 { margin: 0 0 9px; font-size: 15px; color: var(--accent); }
.card p { margin: 0; font-size: 14px; color: var(--text); }
.card strong { color: var(--accent); }

/* 日记 */
.diary-list { display: flex; flex-direction: column; gap: 14px; }
.entry {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 22px;
  transition: border-color .16s ease, transform .16s ease;
}
.entry:hover { border-color: color-mix(in srgb, var(--accent) 42%, var(--line)); transform: translateX(3px); }
.entry-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.entry-date { font-family: var(--serif); font-size: 12.5px; color: var(--accent); letter-spacing: .6px; }
.entry-title { margin: 0; font-size: 16px; font-weight: 700; }
.entry-body { margin: 0; font-size: 14.5px; color: var(--text); white-space: pre-wrap; }
.entry-tags { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 12px; }
.tag {
  font-size: 11.5px; color: var(--text-soft);
  background: var(--bg-2); border-radius: 999px; padding: 3px 10px;
}
.loading { color: var(--text-soft); font-size: 14px; }

/* 时间线 */
.timeline { list-style: none; margin: 0; padding: 0 0 0 22px; border-left: 2px solid var(--line); }
.timeline li { position: relative; padding: 0 0 24px 20px; }
.timeline li::before {
  content: ""; position: absolute; left: -30px; top: 8px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--accent); border: 2.5px solid var(--bg);
  box-shadow: 0 0 0 1px var(--accent);
}
.tl-date { font-family: var(--serif); font-size: 12.5px; color: var(--text-soft); letter-spacing: .6px; }
.tl-title { margin: 3px 0 4px; font-size: 15px; font-weight: 700; }
.tl-desc { margin: 0; font-size: 14px; color: var(--text-soft); }

/* 页脚 */
.footer {
  position: relative; z-index: 1;
  max-width: var(--maxw); margin: 0 auto;
  padding: 34px 22px 46px;
  border-top: 1px solid var(--line);
  text-align: center;
}
.footer-main { margin: 0 0 5px; font-size: 14px; color: var(--text); }
.footer-main span { color: var(--accent); font-weight: 700; }
.footer-sub { margin: 0; font-size: 12.5px; color: var(--text-soft); }

/* 手机 */
@media (max-width: 620px) {
  .topbar { padding: 12px 15px; gap: 10px; }
  .nav { display: none; }
  main { padding: 0 15px 44px; }
  .hero { padding: 40px 0 34px; }
  .theme-list { right: -6px; min-width: 210px; }
  .entry, .card { padding: 17px 18px; }
}

/* 尊重系统「减少动效」设置 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
}