:root {
  --bg: #0b1020;
  --bg-elevated: rgba(15, 23, 42, 0.82);
  --surface: rgba(16, 24, 45, 0.92);
  --surface-border: rgba(148, 163, 184, 0.18);
  --text: #ecf3ff;
  --muted: #98a4bc;
  --accent: #86efac;
  --accent-soft: rgba(134, 239, 172, 0.14);
  --shadow: 0 24px 80px rgba(2, 6, 23, 0.48);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(34, 197, 94, 0.12), transparent 28%),
    linear-gradient(180deg, #0b1020 0%, #070b16 100%);
  font-family: "IBM Plex Sans KR", system-ui, sans-serif;
  line-height: 1.6;
}

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

a:hover {
  color: var(--accent);
}

.page-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
}

.sidebar,
.panel {
  border: 1px solid var(--surface-border);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.sidebar {
  position: sticky;
  top: 24px;
  align-self: start;
  padding: 28px;
  border-radius: 28px;
}

.eyebrow,
.section-kicker,
.timeline-meta,
.project-index,
.availability-label {
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.8rem;
}

h1,
h2,
h3,
p,
ul {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.05;
}

h2 {
  font-size: 1.45rem;
}

h3 {
  font-size: 1.1rem;
}

.lede,
.muted,
.availability-card p,
.project-card p,
.timeline-body p,
.split-panel p {
  color: var(--muted);
}

.lede {
  margin-top: 16px;
  font-size: 1.02rem;
}

.stacked + .stacked {
  margin-top: 28px;
}

.plain-list,
.bullet-list {
  padding: 0;
  margin-top: 14px;
}

.plain-list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.bullet-list {
  padding-left: 20px;
  color: var(--muted);
  display: grid;
  gap: 8px;
}

.content {
  display: grid;
  gap: 24px;
}

.panel {
  border-radius: 28px;
  padding: 28px;
}

.hero {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 1.3fr) minmax(240px, 320px);
  align-items: start;
}

.hero-copy {
  margin-top: 12px;
  max-width: 42rem;
  font-size: 1.08rem;
}

.availability-card {
  padding: 20px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(134, 239, 172, 0.14), rgba(14, 165, 233, 0.08));
  border: 1px solid rgba(134, 239, 172, 0.2);
}

.availability-label,
.section-kicker,
.timeline-meta,
.project-index {
  color: var(--accent);
  font-size: 0.78rem;
}

.availability-card strong {
  display: block;
  margin-top: 10px;
  font-size: 1.1rem;
}

.availability-card p {
  margin-top: 10px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 22px;
}

.timeline-item + .timeline-item {
  margin-top: 26px;
  padding-top: 26px;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
}

.timeline-item {
  display: grid;
  gap: 16px;
  grid-template-columns: 160px minmax(0, 1fr);
}

.timeline-meta {
  color: var(--muted);
  font-size: 0.76rem;
  display: grid;
  gap: 6px;
}

.timeline-body {
  display: grid;
  gap: 12px;
}

.project-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.project-card {
  padding: 20px;
  border-radius: 22px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(8, 13, 27, 0.55);
  display: grid;
  gap: 12px;
}

.project-card h3 {
  font-size: 1.08rem;
}

.tech-line {
  color: var(--text) !important;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
}

.split-panel {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 980px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .hero,
  .timeline-item,
  .project-grid,
  .split-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 1200px);
    padding: 20px 0 32px;
  }

  .sidebar,
  .panel {
    padding: 22px;
    border-radius: 22px;
  }

  h2 {
    font-size: 1.25rem;
  }

  .hero-copy,
  .lede {
    font-size: 1rem;
  }
}