:root {
  --ink: #0e1116;
  --fog: #f3f5f7;
  --signal: #ff6a3d;
  --tide: #2b8cbe;
  --moss: #2f6f4e;
  --ash: #9aa4b2;
  --paper: #ffffff;
  --max: 1100px;
  --radius: 14px;
  --shadow: 0 18px 40px rgba(14, 17, 22, 0.08);
  --shadow-soft: 0 10px 24px rgba(14, 17, 22, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Inter", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 12%, rgba(255, 106, 61, 0.12), transparent 35%),
    radial-gradient(circle at 85% 10%, rgba(43, 140, 190, 0.14), transparent 40%),
    linear-gradient(150deg, rgba(255, 106, 61, 0.07), transparent 34%),
    var(--fog);
  line-height: 1.6;
}

a {
  color: var(--tide);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(243, 245, 247, 0.9);
  border-bottom: 1px solid rgba(154, 164, 178, 0.2);
  box-shadow: 0 12px 30px rgba(14, 17, 22, 0.04);
}

.wrap {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  color: var(--ink);
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: url('/public/images/alpha-claw-icon-96.webp') center/cover no-repeat;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.45), 0 2px 6px rgba(14,17,22,0.25);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.nav-links a {
  padding: 0.3rem 0.55rem;
  border-radius: 8px;
  color: var(--ink);
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a.active {
  background: rgba(43, 140, 190, 0.12);
  color: #0b5f88;
}

.hero {
  margin-top: 1.8rem;
  background: var(--paper);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: clamp(1.2rem, 2.8vw, 2.4rem);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -120px -90px auto;
  width: 360px;
  height: 180px;
  background: repeating-linear-gradient(
    -18deg,
    rgba(43, 140, 190, 0.08),
    rgba(43, 140, 190, 0.08) 10px,
    rgba(255, 106, 61, 0.08) 10px,
    rgba(255, 106, 61, 0.08) 20px
  );
  transform: rotate(4deg);
  border-radius: 18px;
}

h1, h2, h3 {
  font-family: "Fraunces", Georgia, serif;
  line-height: 1.15;
  margin: 0 0 0.6rem;
}

h1 {
  font-size: clamp(1.8rem, 5vw, 3.1rem);
}

.grid {
  margin: 1.8rem 0 2.5rem;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
}

.card {
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1rem 1.1rem;
  border-top: 4px solid rgba(154, 164, 178, 0.45);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.card.signal { border-top-color: var(--signal); }
.card.tide { border-top-color: var(--tide); }
.card.moss { border-top-color: var(--moss); }

.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-12 { grid-column: span 12; }

.badge {
  font-size: 0.73rem;
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
  display: inline-block;
  margin-bottom: 0.5rem;
  color: #fff;
  background: var(--moss);
  letter-spacing: 0.02em;
}

.badge.link { background: var(--tide); }
.badge.archive { background: #6c7787; }

.meta {
  font-family: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
  font-size: 0.8rem;
  color: #55606f;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 2px;
  background: rgba(43, 140, 190, 0.35);
}

.timeline li {
  position: relative;
  margin: 0 0 1rem;
  padding-left: 1.9rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.36rem;
  width: 0.95rem;
  height: 0.95rem;
  border-radius: 50%;
  background: var(--signal);
}

footer {
  border-top: 1px solid rgba(154, 164, 178, 0.32);
  padding: 1.2rem 0 2rem;
  color: #495261;
  font-size: 0.92rem;
}

.kpis {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.kpis .pill {
  background: rgba(43, 140, 190, 0.1);
  color: #0c638f;
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-size: 0.84rem;
}

.notice {
  margin: 1rem 0 1.2rem;
  padding: 0.8rem 1rem;
  border-radius: 12px;
  background: rgba(255, 106, 61, 0.08);
  border: 1px solid rgba(255, 106, 61, 0.3);
  color: #6a2f1f;
}

.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.link-list li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.8rem;
  border-radius: 12px;
  background: rgba(43, 140, 190, 0.06);
  border: 1px solid rgba(43, 140, 190, 0.18);
}

.link-list a {
  font-weight: 600;
  color: #0b5f88;
}

.essay-content {
  font-size: 1.05rem;
  line-height: 1.75;
  max-width: 72ch;
  overflow: hidden;
  box-sizing: border-box;
}

.essay-content h1 {
  font-size: clamp(1.4rem, 3.5vw, 2.2rem);
  margin-top: 0;
}

.essay-content h2 {
  font-size: 1.3rem;
  margin-top: 1.8rem;
  color: var(--moss);
}

.essay-content p {
  margin: 0.8rem 0;
}

.essay-content em {
  color: #495261;
}

.essay-content strong {
  color: var(--ink);
}

.essay-content hr {
  border: none;
  border-top: 1px solid rgba(154, 164, 178, 0.3);
  margin: 1.8rem 0;
}

.essay-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1rem 0;
}

.essay-content blockquote {
  border-left: 3px solid var(--tide);
  margin: 1rem 0;
  padding: 0.4rem 1rem;
  color: #495261;
  background: rgba(43, 140, 190, 0.04);
  border-radius: 0 8px 8px 0;
}

@media (max-width: 900px) {
  .col-8, .col-6, .col-4 {
    grid-column: span 12;
  }

  .nav {
    flex-direction: column;
    align-items: flex-start;
  }
}