/* ============================================================
   星冕 VR3D — Global: typography / layout / ui components
   ============================================================ */

/* ---------- Type scale ---------- */
.display-1 {
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.05;
}
.display-2 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.12;
}
.h1 { font-size: clamp(1.9rem, 4vw, 2.9rem); }
.h2 { font-size: clamp(1.45rem, 2.8vw, 2.1rem); }
.h3 { font-size: clamp(1.15rem, 1.8vw, 1.45rem); }
.lead { font-size: clamp(1.02rem, 1.4vw, 1.18rem); color: var(--text-2); }
.muted { color: var(--text-2); }
.small { font-size: .84rem; }
.micro {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .22em;
  font-weight: 600;
}

.grad-text {
  background: var(--neon-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Container / layout ---------- */
.container {
  width: min(1440px, 100% - clamp(32px, 8vw, 120px));
  margin-inline: auto;
}
.container--wide { width: min(1680px, 100% - clamp(24px, 5vw, 80px)); }
.section { padding-block: clamp(64px, 11vh, 140px); }
.section--tight { padding-block: clamp(44px, 7vh, 84px); }

.grid { display: grid; gap: 24px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: 12px; }
.gap-md { gap: 20px; }
.gap-lg { gap: 32px; }
.wrap { flex-wrap: wrap; }
.center { display: grid; place-items: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: .76rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--neon);
  font-weight: 700;
}
.eyebrow::before {
  content: "";
  width: 28px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon));
}

.section-head { margin-bottom: clamp(32px, 6vh, 64px); max-width: 780px; }
.section-head .desc { margin-top: 14px; color: var(--text-2); }

/* ---------- Glass surfaces ---------- */
.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  backdrop-filter: blur(18px) saturate(1.3);
  border: 1px solid var(--glass-border);
  box-shadow:
    inset 0 1px 0 var(--glass-highlight),
    var(--shadow-2);
}

/* ---------- Buttons ---------- */
.btn {
  --btn-pad: 14px 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: var(--btn-pad);
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .01em;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
    background .3s, color .3s, border-color .3s;
  user-select: none;
}
.btn:active { transform: translateY(1px) scale(.98); }
.btn svg, .btn img { width: 18px; height: 18px; }

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .18);
}

.btn-outline {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--text);
  transform: translateY(-2px);
}

.btn-ghost { color: var(--text-2); }
.btn-ghost:hover { color: var(--text); background: var(--bg-elev); }

.btn-neon {
  background: var(--neon-grad);
  color: #fff;
  box-shadow: 0 10px 30px rgba(124, 108, 255, .28);
}
.btn-neon:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 44px rgba(124, 108, 255, .42);
}

.btn-lg { --btn-pad: 18px 34px; font-size: 1.02rem; }
.btn-sm { --btn-pad: 9px 18px; font-size: .84rem; }

.btn-icon {
  width: 44px; height: 44px;
  padding: 0;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--border);
  color: var(--text);
  transition: transform .3s var(--ease), border-color .3s, color .3s, box-shadow .3s;
}
.btn-icon:hover {
  border-color: var(--neon);
  color: var(--neon);
  box-shadow: var(--glow-accent);
  transform: translateY(-2px);
}
.btn-icon svg { width: 18px; height: 18px; }

/* ---------- Chips / tags / badges ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
  font-size: .82rem;
  color: var(--text-2);
  cursor: pointer;
  transition: all .3s var(--ease);
  background: transparent;
}
.chip:hover { color: var(--text); border-color: var(--text-3); }
.chip.is-active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}

.tag {
  display: inline-block;
  padding: 3px 11px;
  border-radius: var(--r-pill);
  font-size: .74rem;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--text-2);
  background: var(--bg-soft);
  transition: all .3s;
}
a.tag:hover { color: var(--neon); border-color: var(--neon); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: var(--r-pill);
}
.badge--neon {
  background: var(--neon-grad);
  color: #fff;
  box-shadow: var(--glow-accent);
}
.badge--line { border: 1px solid var(--border); color: var(--text-2); }

/* ---------- Forms ---------- */
.field { display: flex; flex-direction: column; gap: 8px; }
.field > label {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--text-2);
}
.input, .textarea, .select {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  transition: border-color .3s, box-shadow .3s;
}
.input:focus, .textarea:focus, .select:focus {
  outline: none;
  border-color: var(--neon);
  box-shadow: 0 0 0 3px var(--selection);
}
.input::placeholder, .textarea::placeholder { color: var(--text-3); }
.textarea { min-height: 140px; resize: vertical; line-height: 1.7; }
.select { appearance: none; -webkit-appearance: none; cursor: pointer; }

.form-grid { display: grid; gap: 22px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 22px; }

/* check / switch */
.check { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; font-size: .92rem; }
.check input { accent-color: var(--neon); width: 16px; height: 16px; }

/* ---------- Cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease), border-color .4s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--border);
  box-shadow: var(--shadow-2);
}

/* ---------- Divider & scroll hint ---------- */
.hr-gradient {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  border: 0;
}

/* ---------- Empty state ---------- */
.empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-3);
}
.empty .empty-icon { font-size: 44px; margin-bottom: 16px; opacity: .5; }

/* ---------- Back to top ---------- */
#to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all .4s var(--ease);
}
#to-top.show { opacity: 1; visibility: visible; transform: none; }

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- Skeleton ---------- */
.skeleton {
  border-radius: var(--r-md);
  background: linear-gradient(100deg, var(--card) 40%, var(--card-2) 50%, var(--card) 60%);
  background-size: 200% 100%;
  animation: sk 1.4s infinite linear;
}
@keyframes sk { to { background-position: -200% 0; } }

/* ---------- Utilities for misc ---------- */
.text-center { text-align: center; }
.pos-relative { position: relative; }
.overflow-hidden { overflow: hidden; }
.user-select-none { user-select: none; }

/* 主体内容层：位于背景/光球之上 */
.site-wrap { position: relative; z-index: 1; }

/* ============================================================
   全局搜索面板（Header 搜索按钮弹出）
   ============================================================ */
.search-panel {
  position: fixed;
  inset: 0;
  z-index: 1800;
  display: grid;
  align-items: start;
  justify-items: center;
  padding: min(12vh, 120px) 20px 20px;
  visibility: hidden;
  opacity: 0;
  transition: opacity .35s var(--ease), visibility .35s;
}
.search-panel.open { visibility: visible; opacity: 1; }
.search-panel-backdrop {
  position: absolute;
  inset: 0;
  background: var(--overlay);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.search-panel-inner {
  position: relative;
  z-index: 2;
  width: min(720px, 100%);
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(22px);
  backdrop-filter: blur(22px);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-3);
  padding: 22px;
  transform: translateY(-14px) scale(.985);
  transition: transform .4s var(--ease-out);
  max-height: 78vh;
  display: flex;
  flex-direction: column;
}
.search-panel.open .search-panel-inner { transform: none; }
.search-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.search-panel-head h3 { font-size: .78rem; text-transform: uppercase; letter-spacing: .2em; color: var(--text-3); }
.search-panel-input { position: relative; display: flex; align-items: center; }
.search-panel-input > svg {
  position: absolute;
  left: 16px;
  width: 19px; height: 19px;
  color: var(--text-3);
  pointer-events: none;
}
.search-panel-input input {
  width: 100%;
  padding: 16px 18px 16px 48px;
  font-size: 1.05rem;
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  background: var(--bg-elev);
  color: var(--text);
}
.search-panel-input input:focus {
  outline: none;
  border-color: var(--neon);
  box-shadow: 0 0 0 3px var(--selection);
}
.search-panel-results {
  overflow-y: auto;
  margin-top: 14px;
  flex: 1;
  display: grid;
  align-content: start;
  gap: 6px;
  min-height: 60px;
}
.sp-item {
  display: grid;
  grid-template-columns: 54px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: all .25s;
}
.sp-item:hover { background: var(--glass-highlight); border-color: var(--glass-border); }
.sp-kind {
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--neon);
  border: 1px solid var(--neon);
  border-radius: var(--r-pill);
  padding: 3px 9px;
  justify-self: start;
}
.sp-title { font-size: .94rem; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sp-extra { font-size: .76rem; color: var(--text-3); }
.sp-tags { padding: 8px 14px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.search-panel-more {
  margin-top: 12px;
  align-self: center;
  color: var(--neon);
  font-size: .9rem;
  font-weight: 600;
  display: none;
  padding: 10px 22px;
  border-radius: var(--r-pill);
  border: 1px solid var(--neon);
  transition: all .3s;
}
.search-panel-more:hover { background: var(--inline-code-bg); }

/* ============================================================
   Toast
   ============================================================ */
#toast { font-family: var(--font-sans); }