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

/* ── Themes ── */
:root, [data-theme="dark"] {
  --bg: #1a1a18;
  --surface: #222220;
  --border: #2e2e2b;
  --text: #d4d0c8;
  --text-muted: #7a7870;
  --accent: #c44444;
  --link: #a83030;
  --link-hover: #e05555;
  --player-bg: #222220;
  --player-track: #3a3a36;
  --player-fill: #c44444;
  --toggle-bg: #2e2e2b;
  --toggle-knob: #7a7870;
  --name-color: #e8e4dc;
  --footnote-bg: #252523;
  --footnote-border: #3a3a36;
  --tooltip-bg: #2a2a28;
  --tooltip-border: #3a3a36;
  --tooltip-text: #d4d0c8;
}

html { scroll-behavior: smooth; }

[data-theme="light"] {
  --bg: #f5f2ec;
  --surface: #edeae3;
  --border: #d8d4ca;
  --text: #2a2820;
  --text-muted: #8a8678;
  --accent: #9a2020;
  --link: #7a1818;
  --link-hover: #c43030;
  --player-bg: #edeae3;
  --player-track: #ccc8be;
  --player-fill: #9a2020;
  --toggle-bg: #d8d4ca;
  --toggle-knob: #8a8678;
  --name-color: #1a1810;
  --footnote-bg: #edeae3;
  --footnote-border: #d8d4ca;
  --tooltip-bg: #e8e4dc;
  --tooltip-border: #ccc8be;
  --tooltip-text: #2a2820;
}

:root {
  --font-serif: 'EB Garamond', Georgia, serif;
  --font-mono: 'Inconsolata', monospace;
  --max-w: 820px;
  --sidebar-w: 220px;
  --content-max: 640px;
}

html { font-size: 21px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-serif);
  line-height: 1.75;
  padding: 0 1.5rem;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s, color 0.25s;
  overflow-x: hidden;
}

.site-wrapper {
  max-width: var(--max-w);
  margin: 0 auto;
  animation: fadein 0.5s ease both;
  width: 100%;
}

@keyframes fadein {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Links ── */
a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border);
  transition: color 0.15s, text-decoration-color 0.15s;
}

a:hover {
  color: var(--link-hover);
  text-decoration-color: var(--link-hover);
}

/* ── Header ── */
header {
  padding: 4rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.name {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--name-color);
  letter-spacing: 0.01em;
  margin-bottom: 0.15rem;
  transition: color 0.25s;
  text-decoration: none;
  display: block;
}

.name:hover { color: var(--accent); text-decoration: none; }

.tagline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ── Theme Toggle ── */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
  padding-bottom: 0.1rem;
}

.theme-toggle-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.2s;
}

.toggle-track {
  width: 36px;
  height: 20px;
  background: var(--toggle-bg);
  border-radius: 10px;
  border: 1px solid var(--border);
  position: relative;
  transition: background 0.25s, border-color 0.25s;
}

.toggle-knob {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--toggle-knob);
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.25s cubic-bezier(.4,0,.2,1), background 0.25s;
}

[data-theme="light"] .toggle-knob {
  transform: translateX(16px);
  background: var(--accent);
}

/* ── Nav ── */
nav {
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

nav a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

nav a:hover, nav a.active { color: var(--accent); }

/* ── Sections ── */
section {
  padding: 2.8rem 0;
  border-bottom: 1px solid var(--border);
}

section:last-of-type { border-bottom: none; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.section-label::after {
  content: '';
  display: block;
  height: 1px;
  width: 2rem;
  background: var(--border);
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  margin-top: 2.5rem;
  transition: color 0.15s;
}

.back-to-top:hover { color: var(--accent); text-decoration: none; }

/* ── Audio Player ── */
.audio-player {
  margin-top: 1rem;
  background: var(--player-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem 1rem;
  transition: background 0.25s, border-color 0.25s;
}

.player-track-name {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.play-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.play-btn:hover { background: var(--border); color: var(--link-hover); }
.play-btn svg { display: block; }

.progress-wrap {
  flex: 1;
  height: 3px;
  background: var(--player-track);
  border-radius: 2px;
  position: relative;
  cursor: pointer;
  transition: height 0.1s, background 0.25s;
}

.progress-wrap:hover { height: 5px; }

.progress-fill {
  height: 100%;
  background: var(--player-fill);
  border-radius: 2px;
  width: 0%;
  pointer-events: none;
  transition: background 0.25s;
}

.time-display {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  min-width: 4.5rem;
  text-align: right;
}

/* ── Visualizer ── */
#visualizer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100px;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
  z-index: 50;
}

#visualizer.active { opacity: 1; }

/* ── Footer ── */
footer { padding: 2.5rem 0 3rem; }

footer p {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.audio-hud {
  position: fixed;
  bottom: 2.8rem;
  right: 1.7rem;
  z-index: 60;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  display: flex;
  align-items: flex-end;
}

.audio-hud.active {
  opacity: 1;
  pointer-events: all;
}

.audio-hud-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.audio-hud-toggle:hover { background: var(--border); }

.audio-hud-expanded {
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.5rem;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
  display: flex; /* always rendered, hidden via opacity */
  width: 36px;
}

.audio-hud-expanded.open {
  opacity: 1;
  pointer-events: all;
}

.audio-hud-volume {
  writing-mode: vertical-lr;
  direction: rtl;
  height: 80px;
  accent-color: var(--accent);
  cursor: pointer;
}

.audio-hud-stop {
  width: 24px;
  height: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
}

.audio-hud-stop:hover { background: var(--border); }

.audio-hud-track {
  width: 6px;
  height: 80px;
  background: var(--player-track);
  border-radius: 3px;
  position: relative;
  cursor: pointer;
  margin: 0 auto;
}

.audio-hud-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  pointer-events: none;
  transition: background 0.25s;
}