/* ============ ARC MEDIA HOUSE — design system ============ */

:root {
  --bg: #0a0a0a;
  --bg-2: #131313;
  --bg-3: #1a1a1a;
  --fg: #f4f4f1;
  --fg-2: #a8a8a3;
  --fg-3: #5a5a57;
  --line: #2a2a2a;
  --accent: oklch(0.92 0.20 120);
  --accent-ink: #0a0a0a;
  --grid: 12;
  --gutter: clamp(16px, 2vw, 28px);
  --pad-x: clamp(20px, 4vw, 56px);
  --radius: 0px;
  --t-fast: 180ms cubic-bezier(.2,.7,.2,1);
  --t-med:  420ms cubic-bezier(.2,.7,.2,1);
  --t-slow: 800ms cubic-bezier(.2,.7,.2,1);
}

[data-theme="light"] {
  --bg: #f4f4f1;
  --bg-2: #ebebe6;
  --bg-3: #deded8;
  --fg: #0a0a0a;
  --fg-2: #4a4a47;
  --fg-3: #8a8a87;
  --line: #d2d2cd;
  --accent: oklch(0.78 0.20 120);
  --accent-ink: #0a0a0a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--bg); color: var(--fg); }
html { -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Geist', 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  cursor: none;
  transition: background var(--t-med), color var(--t-med);
}
@media (max-width: 720px) { body { cursor: auto; } }

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: var(--accent); color: var(--accent-ink); }

/* === type system === */
.mono { font-family: 'Geist Mono', 'JetBrains Mono', ui-monospace, monospace; font-feature-settings: "ss01"; letter-spacing: 0; }
.eyebrow {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-2);
}
.eyebrow .dot {
  display: inline-block; width: 6px; height: 6px; background: var(--accent);
  margin-right: 8px; vertical-align: middle; border-radius: 50%;
}

h1, h2, h3, h4 { font-weight: 500; letter-spacing: -0.035em; line-height: 0.92; }

.h-display {
  font-size: clamp(64px, 14vw, 240px);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 0.92;
  padding-bottom: 0.08em;
}
.h-1 {
  font-size: clamp(40px, 6.5vw, 104px);
  letter-spacing: -0.04em;
  line-height: 0.94;
}
.h-2 {
  font-size: clamp(32px, 4.4vw, 72px);
  letter-spacing: -0.035em;
  line-height: 0.96;
}
.h-3 {
  font-size: clamp(22px, 2vw, 32px);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.body-lg { font-size: clamp(18px, 1.4vw, 22px); line-height: 1.45; color: var(--fg-2); max-width: 60ch; }
.body { font-size: 15px; line-height: 1.5; color: var(--fg-2); }
.body-sm { font-size: 13px; line-height: 1.45; color: var(--fg-2); }

.italic { font-style: italic; font-feature-settings: "ss02"; }
.underline { text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }

/* === layout === */
.container {
  width: 100%;
  padding-inline: var(--pad-x);
}
.grid12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gutter);
}
.divider { height: 1px; background: var(--line); width: 100%; }
.divider-v { width: 1px; background: var(--line); align-self: stretch; }

section { position: relative; }

/* === cursor === */
.cursor {
  position: fixed; top: 0; left: 0; pointer-events: none; z-index: 9999;
  width: 8px; height: 8px; border-radius: 50%;
  background: #fff;
  transform: translate(-50%, -50%);
  transition: width var(--t-fast), height var(--t-fast), background var(--t-fast);
  mix-blend-mode: difference;
}
.cursor.is-hover { width: 56px; height: 56px; background: var(--accent); }
.cursor.is-text { width: 2px; height: 22px; border-radius: 1px; }
@media (max-width: 720px) { .cursor { display: none; } }

/* === nav === */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px var(--pad-x);
  display: flex; align-items: center; justify-content: space-between;
  color: var(--fg);
  background: linear-gradient(to bottom, var(--bg) 0%, color-mix(in srgb, var(--bg) 70%, transparent) 70%, transparent 100%);
  backdrop-filter: blur(2px);
}
.nav__logo {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex; gap: 6px; align-items: center;
}
.nav__logo b { font-weight: 600; }
.nav__links { display: flex; gap: 28px; align-items: center; }
.nav__links a {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
  position: relative;
}
.nav__links a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -4px; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-med);
}
.nav__links a:hover::after, .nav__links a.is-active::after { transform: scaleX(1); }

.nav__tools { display: flex; gap: 16px; align-items: center; }
.lang-switch, .theme-switch {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  display: flex; gap: 0; align-items: center;
  border: 1px solid currentColor; padding: 4px 0;
}
.lang-switch button, .theme-switch button { padding: 2px 8px; opacity: 0.5; transition: opacity var(--t-fast), background var(--t-fast), color var(--t-fast); }
.lang-switch button.is-active, .theme-switch button.is-active { opacity: 1; background: var(--fg); color: var(--bg); }

@media (max-width: 720px) {
  .nav__links { display: none; }
}

/* === buttons === */
.btn {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 18px 28px;
  border: 1px solid var(--fg);
  background: transparent;
  color: var(--fg);
  position: relative;
  overflow: hidden;
  transition: color var(--t-med);
}
.btn::before {
  content: ''; position: absolute; inset: 0;
  background: var(--fg);
  transform: translateY(101%);
  transition: transform var(--t-med);
  z-index: -1;
}
.btn:hover { color: var(--bg); }
.btn:hover::before { transform: translateY(0); }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--primary::before { background: var(--fg); }
.btn--primary:hover { color: var(--bg); }
.btn .arrow { display: inline-block; transition: transform var(--t-med); }
.btn:hover .arrow { transform: translateX(4px); }


/* === reveal === */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 800ms cubic-bezier(.2,.7,.2,1), transform 800ms cubic-bezier(.2,.7,.2,1);
}
.reveal.is-in { opacity: 1; transform: translateY(0); }
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }
.reveal[data-delay="5"] { transition-delay: 400ms; }

/* === intro logo === */
.intro {
  position: fixed; inset: 0; z-index: 1000;
  background: var(--bg); color: var(--fg);
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.intro__logo { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.intro__inner { display: flex; align-items: baseline; gap: 4px; padding: 0 0.08em; overflow: hidden; }
.intro__char {
  display: inline-block;
  font-family: 'Geist', sans-serif;
  font-weight: 500;
  font-size: clamp(80px, 18vw, 280px);
  letter-spacing: -0.06em;
  line-height: 1;
  transform: translateY(110%);
  animation: introIn 500ms cubic-bezier(.2,.7,.2,1) forwards;
}
.intro__char:nth-child(1) { animation-delay: 40ms; }
.intro__char:nth-child(2) { animation-delay: 120ms; }
.intro__char:nth-child(3) { animation-delay: 200ms; }
.intro__sub {
  display: flex; gap: 0.4em;
  font-family: 'Geist Mono', monospace;
  font-size: clamp(12px, 1.4vw, 18px);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--fg-2);
  opacity: 0;
  animation: fadeIn 500ms 380ms forwards;
}
.intro__line {
  position: absolute; left: var(--pad-x); right: var(--pad-x); bottom: 32px;
  display: flex; justify-content: space-between;
  font-family: 'Geist Mono', monospace; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--fg-2);
  opacity: 0; animation: fadeIn 400ms 300ms forwards;
}
.intro__bar {
  position: absolute; left: 0; bottom: 0; height: 2px; background: var(--accent);
  width: 0%; animation: barIn 700ms cubic-bezier(.2,.7,.2,1) forwards;
}
@keyframes introIn { to { transform: translateY(0); } }
@keyframes fadeIn { to { opacity: 1; } }
@keyframes barIn { from { width: 0; } to { width: 100%; } }
.intro.is-out {
  animation: introOut 500ms cubic-bezier(.7,0,.3,1) forwards;
  animation-delay: 700ms;
}
@keyframes introOut {
  to { transform: translateY(-100%); }
}

/* === footer === */
footer {
  border-top: 1px solid var(--line);
  padding: 80px var(--pad-x) 32px;
  margin-top: 120px;
  background: var(--bg);
}
.foot-display {
  font-size: clamp(80px, 18vw, 260px);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 0.84;
  margin-block: 40px 60px;
}
.foot-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; padding-top: 40px; border-top: 1px solid var(--line); }
.foot-cols h5 { font-family: 'Geist Mono', monospace; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-2); margin-bottom: 16px; font-weight: 400; }
.foot-cols a, .foot-cols p { font-size: 14px; line-height: 1.7; display: block; color: var(--fg); }
.foot-cols a:hover { color: var(--accent); }
.foot-meta { display: flex; justify-content: space-between; padding-top: 32px; margin-top: 60px; border-top: 1px solid var(--line); font-family: 'Geist Mono', monospace; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); }
@media (max-width: 720px) {
  .foot-cols { grid-template-columns: repeat(2, 1fr); }
  .foot-meta { flex-direction: column; gap: 12px; }
}

/* === utilities === */
.hr-tick { border-top: 1px solid var(--line); display: flex; }
.hr-tick > div { flex: 1; padding: 14px 0; font-family: 'Geist Mono', monospace; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-2); }
.hr-tick > div + div { border-left: 1px solid var(--line); padding-left: 14px; }

.tick-row {
  display: flex; align-items: center; gap: 12px;
  font-family: 'Geist Mono', monospace; font-size: 11px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--fg-2);
}
.tick-row::before { content: ''; display: inline-block; width: 22px; height: 1px; background: var(--fg-2); }

.bracket-num {
  font-family: 'Geist Mono', monospace; font-size: 11px; letter-spacing: 0.1em;
  color: var(--fg-3);
}

/* === clip & misc === */
.clip { overflow: hidden; }
.spacer-xl { height: clamp(80px, 14vh, 180px); }
.spacer-l { height: clamp(60px, 10vh, 120px); }
.spacer-m { height: clamp(40px, 6vh, 80px); }

/* === word reveal === */
.word-reveal { display: inline-block; overflow: hidden; vertical-align: bottom; }
.word-reveal > span { display: inline-block; transform: translateY(110%); transition: transform 900ms cubic-bezier(.2,.7,.2,1); }
.word-reveal.is-in > span { transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}