*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0a0a;
  --surface: #111;
  --border: #222;
  --accent: #7c3aed;
  --accent2: #a855f7;
  --text: #e8e6e0;
  --muted: #888;
  --mono: "Courier New", Courier, monospace;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  line-height: 1.7;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── layout ── */
header {
  border-bottom: 1px solid var(--border);
  padding: 1.4rem 2rem;
  display: flex;
  align-items: baseline;
  gap: 2rem;
  flex-wrap: wrap;
}

header .logo {
  font-size: 1.5rem;
  font-weight: bold;
  letter-spacing: 0.05em;
  color: var(--text);
  text-decoration: none;
}

header .logo span { color: var(--accent); }

nav { display: flex; gap: 1.6rem; }
nav a { color: var(--muted); font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; }
nav a:hover, nav a.active { color: var(--accent); text-decoration: none; }

main {
  max-width: 820px;
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 1.4rem;
  color: var(--muted);
  font-size: 0.75rem;
}

/* ── hero ── */
.hero {
  margin-bottom: 3.5rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero p {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 540px;
}

/* ── waveform decoration ── */
.wave {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  margin: 2rem 0;
  height: 48px;
}

.wave span {
  display: block;
  width: 6px;
  border-radius: 2px;
  background: var(--accent);
  opacity: 0.7;
}

/* ── cards ── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.2rem;
  margin: 2rem 0;
}

.card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.4rem;
  background: var(--surface);
  transition: border-color 0.15s;
}

.card:hover { border-color: var(--accent); }

.card h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent2);
  margin-bottom: 0.5rem;
}

.card p { font-size: 0.9rem; color: var(--muted); }

/* ── sections ── */
.section { margin-bottom: 3rem; }

.section h2 {
  font-size: 1.3rem;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.section p { color: var(--muted); margin-bottom: 0.9rem; font-size: 0.95rem; }

/* ── timeline ── */
.timeline { list-style: none; }

.timeline li {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 1.2rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border);
}

.timeline li:last-child { border-bottom: none; }

.tl-year {
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: bold;
  padding-top: 0.1rem;
}

.tl-body h3 { font-size: 0.95rem; margin-bottom: 0.3rem; }
.tl-body p  { font-size: 0.85rem; color: var(--muted); }

/* ── technique blocks ── */
.tech-block {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  padding: 1.2rem 1.4rem;
  margin-bottom: 1.4rem;
  background: var(--surface);
}

.tech-block h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.tech-block p { font-size: 0.88rem; color: var(--muted); margin-bottom: 0.5rem; }

.tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: #1a1a1a;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.15rem 0.5rem;
  color: var(--accent2);
  margin-right: 0.4rem;
}

/* ── nav links ── */
.page-nav {
  display: flex;
  gap: 1.5rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}

.page-nav a::before { content: "→ "; }