@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@500;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap");

:root {
  --sse-ink: #0b1220;
  --sse-slate: #2c3d56;
  --sse-accent: #3b6ea5;
  --sse-sky: #7aa3cf;
  --sse-mist: #eef3f9;
  --sse-paper: #ffffff;
  --sse-muted: #64748b;
  --sse-line: rgba(44, 61, 86, 0.12);
  --font-brand: "Manrope", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

html {
  font-feature-settings: "kern" 1, "liga" 1;
}

body {
  font-family: var(--font-body) !important;
  background:
    radial-gradient(1200px 480px at 90% -10%, rgba(122, 163, 207, 0.18), transparent 60%),
    radial-gradient(900px 420px at -10% 20%, rgba(59, 110, 165, 0.1), transparent 55%),
    var(--sse-mist) !important;
}

/* —— Navbar —— */
#navbar {
  box-shadow: none !important;
  border-bottom: 1px solid rgba(226, 232, 240, 0.08);
  backdrop-filter: blur(10px);
}

#navbar .navbar-brand {
  font-family: var(--font-brand) !important;
  font-weight: 700;
  letter-spacing: 0.14em;
  display: inline-flex !important;
  align-items: center;
  gap: 10px;
}

#navbar .navbar-brand::before {
  content: "";
  width: 28px;
  height: 28px;
  background: url("/img/logo.png") center / contain no-repeat;
  flex-shrink: 0;
  border-radius: 6px;
}

#navbar .nav-item .nav-link {
  font-family: var(--font-brand);
  letter-spacing: 0.04em;
  font-size: 0.92rem;
}

/* —— Banner / Hero —— */
.banner {
  background-color: var(--sse-ink) !important;
  background-size: cover !important;
  background-position: center !important;
  overflow: hidden;
}

.banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.35) 0%, rgba(15, 23, 42, 0.18) 45%, rgba(15, 23, 42, 0.42) 100%);
  pointer-events: none;
  z-index: 0;
}

.banner .page-subtitle,
.banner .page-title,
.banner #subtitle {
  position: relative;
  z-index: 2;
  font-family: var(--font-brand) !important;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-shadow: 0 8px 28px rgba(0, 0, 0, 0.35) !important;
}

.banner .page-subtitle {
  max-width: min(640px, 88vw);
  text-align: left !important;
  margin-left: max(4vw, 24px) !important;
  line-height: 1.45 !important;
  font-size: clamp(1.35rem, 2.6vw, 2.1rem) !important;
}

.scroll-down-bar {
  z-index: 3;
}

/* —— Cards / board —— */
#board {
  border-radius: 16px !important;
  box-shadow: 0 12px 36px rgba(15, 23, 42, 0.06) !important;
  border: 1px solid var(--sse-line);
  overflow: hidden;
}

.index-card {
  border-radius: 12px;
  transition: transform .2s ease, box-shadow .2s ease;
}

.index-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

.index-header a,
.index-header {
  color: #0f172a !important;
  font-family: var(--font-brand);
  font-weight: 700;
}

.index-excerpt {
  color: #475569 !important;
}

.markdown-body a {
  color: var(--sse-accent) !important;
  border-bottom: 1px solid rgba(59, 110, 165, 0.2);
}

.markdown-body a:hover {
  color: #2c5686 !important;
  background: rgba(59, 110, 165, 0.08) !important;
}

.btn, .button, button {
  border-radius: 10px !important;
}

footer {
  font-size: 13px;
  letter-spacing: 0.04em;
  font-family: var(--font-brand);
}

.list-group-item {
  border-color: var(--sse-line) !important;
}

@media (max-width: 900px) {
  .banner .page-subtitle {
    max-width: 80vw;
  }
}

@media (max-width: 560px) {
  .banner .page-subtitle {
    max-width: 92vw;
    margin-left: 16px !important;
  }
}

@media (prefers-color-scheme: dark) {
  body {
    background:
      radial-gradient(1000px 400px at 90% -10%, rgba(59, 110, 165, 0.18), transparent 60%),
      #0f172a !important;
  }
  #board {
    border-color: rgba(148, 163, 184, 0.12);
  }
  .index-header a, .index-header { color: #e2e8f0 !important; }
}