/* AMFM internal showcase — static site styles.
   Identity: 50% modern editorial showcase / 35% AMFM retro-industrial terminal / 15% restrained SF ornament.
   All ornament is CSS-only; no images required. */

:root {
  --bg: #07090c;
  --bg-2: #0a0e12;
  --panel: #0d1216;
  --ink: #e7e4dd;
  --ink-dim: rgba(231, 228, 221, 0.72);
  --ink-faint: rgba(231, 228, 221, 0.42);
  --steel: #5f7c88;
  --steel-bright: #8fb6c4;
  --amber: #d98f45;
  --amber-bright: #edb068;
  --red: #c4554b;
  --ok: #6fa598;
  --line: #18232a;
  --line-strong: #293840;
  --font-head: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans KR", "Malgun Gothic", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
  --wrap: 1080px;
  --pad-x: clamp(20px, 4vw, 32px);
  --pad-y: clamp(72px, 9vw, 128px);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

/* Korean: break only at word boundaries, never mid-word (i18n sets html lang="ko"). */
html:lang(ko) {
  word-break: keep-all;
  overflow-wrap: break-word;
}

body {
  margin: 0;
  background:
    radial-gradient(140% 100% at 50% 0%, rgba(95, 124, 136, 0.06), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-head);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: rgba(217, 143, 69, 0.28); color: var(--ink); }

/* ---------- utilities ---------- */

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 10px 16px;
  background: var(--panel);
  color: var(--amber-bright);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-decoration: none;
}
.skip:focus { left: 12px; top: 12px; }

a { color: var(--steel-bright); text-decoration: none; }
a:hover { color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(7, 9, 12, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 36px);
  min-height: 60px;
  flex-wrap: wrap;
  padding-block: 8px;
}

.brand {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand::after {
  content: "";
  width: 1px;
  height: 14px;
  background: var(--line-strong);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 26px);
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 8px 2px;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}

.nav-links a:hover { color: var(--ink); }

.nav-links a[aria-current="page"] {
  color: var(--amber-bright);
  border-bottom-color: rgba(217, 143, 69, 0.55);
}

.lang {
  display: flex;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  overflow: hidden;
  flex-shrink: 0;
}

.lang-btn {
  appearance: none;
  background: transparent;
  border: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  padding: 7px 12px;
  color: var(--ink-faint);
  cursor: pointer;
}

.lang-btn:hover { color: var(--ink); }

.lang-btn.is-active {
  color: var(--amber-bright);
  background: rgba(217, 143, 69, 0.1);
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(96px, 14vw, 180px) clamp(80px, 11vw, 140px);
  border-bottom: 1px solid var(--line);
}

.hero-stars {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.55;
}

.hero-inner {
  position: relative;
  max-width: 880px;
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.hero-top {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.hero-top .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--steel);
  flex-shrink: 0;
}

.hero-serial {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 clamp(14px, 2vw, 22px);
}

.hero-name {
  margin: 0 0 clamp(22px, 3.4vw, 40px);
  font-size: clamp(42px, 6.4vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 700;
  color: var(--ink);
  max-width: 13ch;
}

.hero-premise {
  margin: 0 0 14px;
  font-size: clamp(19px, 2.3vw, 27px);
  line-height: 1.4;
  letter-spacing: -0.012em;
  font-weight: 500;
  color: var(--ink);
  max-width: 30ch;
}

.hero-support {
  margin: 0 0 clamp(30px, 4vw, 52px);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.phase-chip {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber-bright);
  border: 1px solid rgba(217, 143, 69, 0.45);
  border-radius: 3px;
  padding: 6px 12px;
}

.hero-tick {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-tick::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ok);
  animation: soft-pulse 2.6s ease-in-out infinite;
}

@keyframes soft-pulse {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

/* ---------- sections ---------- */

.section {
  padding-block: var(--pad-y);
  border-bottom: 1px solid var(--line);
}

.section--tint {
  background: linear-gradient(180deg, rgba(95, 124, 136, 0.045), transparent 70%);
}

.sec-head {
  max-width: 720px;
  margin-bottom: clamp(36px, 5vw, 64px);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.eyebrow::after {
  content: "";
  flex: 1;
  max-width: 72px;
  height: 1px;
  background: var(--line-strong);
}

.sec-title {
  margin: 0 0 16px;
  font-size: clamp(30px, 3.8vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.022em;
  font-weight: 700;
}

.sec-body {
  margin: 0;
  color: var(--ink-dim);
  max-width: 58ch;
}

/* ---------- media placeholders ---------- */

.media { margin: 0; }

.media-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background:
    radial-gradient(130% 95% at 50% 118%, rgba(95, 124, 136, 0.16), transparent 62%),
    linear-gradient(180deg, #0c1319, #07090c);
}

.media--tall .media-frame { aspect-ratio: 4 / 3; }
.media--small .media-frame { aspect-ratio: 16 / 10; }

.media-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.3;
}

.media-center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 12px;
  text-align: center;
  padding: 24px;
}

.media-status {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel-bright);
}

.media-cue {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}

.media-caption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.media-tag { color: var(--steel); flex-shrink: 0; }

/* corner brackets */

.media-frame::before,
.media-frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
}

.media-frame::before {
  top: 12px;
  left: 12px;
  border-top: 2px solid var(--steel);
  border-left: 2px solid var(--steel);
}

.media-frame::after {
  bottom: 12px;
  right: 12px;
  border-bottom: 2px solid var(--steel);
  border-right: 2px solid var(--steel);
}

/* variant tints */

.media--amber .media-frame {
  background:
    radial-gradient(130% 95% at 50% 118%, rgba(217, 143, 69, 0.14), transparent 62%),
    linear-gradient(180deg, #12140f, #08090a);
}

.media--amber .media-frame::before,
.media--amber .media-frame::after { border-color: var(--amber); }

.media--red .media-frame {
  background:
    radial-gradient(130% 95% at 50% 118%, rgba(196, 85, 75, 0.12), transparent 62%),
    linear-gradient(180deg, #140d0d, #08090a);
}

.media--red .media-frame::before,
.media--red .media-frame::after { border-color: var(--red); }

.media--red .media-status { color: #e08a80; }

.media--warm .media-frame {
  background:
    radial-gradient(130% 95% at 50% 118%, rgba(231, 180, 130, 0.1), transparent 62%),
    linear-gradient(180deg, #12100d, #08090a);
}

.media--warm .media-frame::before,
.media--warm .media-frame::after { border-color: #c8a06a; }

.media--cool .media-frame {
  background:
    radial-gradient(130% 95% at 50% 118%, rgba(95, 168, 200, 0.12), transparent 62%),
    linear-gradient(180deg, #0c1216, #08090a);
}

.media--cool .media-frame::before,
.media--cool .media-frame::after { border-color: #6aa0c0; }

.media-label {
  position: absolute;
  top: 16px;
  left: 40px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
  z-index: 2;
}

/* ---------- editorial beats ---------- */

.beats { display: grid; }

.beat {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(28px, 4.5vw, 64px);
  align-items: center;
  padding-block: clamp(48px, 6vw, 92px);
}

.beat--flip .media { order: 2; }

.beat--wide { grid-template-columns: 1fr; }
.beat--wide .media { margin-bottom: clamp(24px, 3vw, 40px); }

.beat-name {
  margin: 0 0 12px;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.012em;
  font-weight: 700;
}

.beat-body {
  margin: 0;
  color: var(--ink-dim);
  max-width: 48ch;
}

.beat-text { align-self: center; }

/* ---------- what is amfm ---------- */

.ideas { display: grid; }

.idea {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: end;
  padding-block: clamp(30px, 4vw, 52px);
  border-top: 1px solid var(--line);
}

.idea-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--steel);
  display: block;
  margin-bottom: 10px;
}

.idea-title {
  margin: 0;
  font-size: clamp(26px, 3.2vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.idea-body {
  margin: 0;
  color: var(--ink-dim);
  font-size: 17px;
}

/* ---------- living ship ---------- */

.bridge-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(28px, 4.5vw, 64px);
  align-items: center;
}

.bridge-text { align-self: center; }

.bridge-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.bridge-points li {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 5px 10px;
}

/* ---------- status board ---------- */

.status-board {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(24px, 3.4vw, 44px);
  max-width: 720px;
}

.status-rows {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 15px;
}

.status-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.status-label { color: var(--ink-dim); }

.status-leader {
  flex: 1;
  border-bottom: 1px dotted var(--line-strong);
  transform: translateY(-4px);
  min-width: 24px;
}

.status-value { flex-shrink: 0; }

.status-value.is-playable { color: var(--ok); }
.status-value.is-active { color: var(--amber-bright); }
.status-value.is-planned { color: var(--ink-faint); }

.status-phase {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber-bright);
}

.status-note {
  margin: 0;
  color: var(--ink-faint);
  font-size: 14px;
}

/* ---------- behind the system ---------- */

.dev-grid {
  display: grid;
  grid-template-columns: 8fr 4fr;
  gap: clamp(24px, 3.4vw, 48px);
  align-items: stretch;
}

.dev-side {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  align-content: stretch;
}

.dev-line {
  margin: clamp(28px, 4vw, 44px) 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel-bright);
}

/* ---------- roadmap ---------- */

.roadmap-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.roadmap-row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: clamp(16px, 2.6vw, 28px);
  align-items: center;
  padding-block: 22px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.roadmap-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

.roadmap-name {
  font-size: clamp(17px, 2vw, 21px);
  letter-spacing: -0.008em;
  font-weight: 600;
}

.roadmap-row.is-current::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--amber);
}

.roadmap-note {
  margin: 26px 0 0;
  color: var(--ink-faint);
  font-size: 14px;
}

/* ---------- chips ---------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  padding: 5px 10px;
  white-space: nowrap;
}

.chip::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.9;
}

.chip--complete { color: var(--ok); }
.chip--current { color: var(--amber-bright); border-color: rgba(217, 143, 69, 0.5); }
.chip--planned { color: var(--ink-faint); }
.chip--polish { color: var(--steel-bright); }

/* ---------- feedback ---------- */

.feedback-body {
  margin: 0 0 24px;
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.4;
  letter-spacing: -0.012em;
  font-weight: 500;
  max-width: 40ch;
}

.feedback-btn {
  appearance: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 12px 18px;
  cursor: not-allowed;
}

.feedback-sub {
  margin: 16px 0 0;
  color: var(--ink-faint);
  font-size: 14px;
  max-width: 56ch;
}

/* ---------- secondary pages ---------- */

.page-head {
  padding-block: clamp(56px, 8vw, 120px) clamp(32px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-title {
  margin: 12px 0 0;
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 700;
  color: var(--ink);
}

.page-intro {
  margin: 18px 0 0;
  max-width: 60ch;
  color: var(--ink-dim);
  font-size: 17px;
  line-height: 1.65;
}

.page-block {
  padding-block: clamp(36px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
}

.page-block:last-child { border-bottom: 0; }

.page-body {
  margin: 12px 0 0;
  max-width: 62ch;
  color: var(--ink-dim);
  font-size: 16px;
  line-height: 1.7;
}

.systems-list { display: grid; }

.systems-row {
  display: grid;
  grid-template-columns: minmax(180px, 260px) auto 1fr;
  gap: 20px;
  align-items: baseline;
  padding-block: 18px;
  border-bottom: 1px solid var(--line);
}

.systems-name {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
}

.mono-sm {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.systems-body {
  margin: 0;
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.6;
}

.systems-note {
  margin: 28px 0 0;
  max-width: 56ch;
  color: var(--ink-faint);
  font-size: 13.5px;
  line-height: 1.6;
}

.dev-mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}

/* ---------- footer ---------- */

.site-footer {
  padding-block: clamp(48px, 6vw, 72px);
  background: var(--bg-2);
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-brand { max-width: 420px; }

.footer-tagline {
  margin: 0 0 8px;
  color: var(--ink-dim);
}

.footer-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-links a { color: var(--steel-bright); }
.footer-links a:hover { color: var(--ink); }

/* ---------- reveal motion ---------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .beat,
  .bridge-grid,
  .dev-grid {
    grid-template-columns: 1fr;
  }

  .beat--flip .media { order: 0; }

  .idea {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 14px 20px;
  }

  .nav { padding-block: 10px; }

  .systems-row {
    grid-template-columns: 1fr;
    row-gap: 8px;
  }

  .systems-row .systems-body { grid-column: 1; }
}

@media (max-width: 640px) {
  :root { --pad-y: clamp(56px, 12vw, 72px); }

  .hero { padding-block: clamp(72px, 16vw, 120px) clamp(56px, 10vw, 88px); }

  .hero-name { font-size: clamp(34px, 9.4vw, 52px); }

  .dev-mini-grid { grid-template-columns: 1fr; }

  .page-title { font-size: clamp(30px, 8vw, 40px); }

  .hero-premise { font-size: clamp(17px, 4.6vw, 22px); }

  .media--tall .media-frame { aspect-ratio: 16 / 10; }

  .status-board { padding: 20px; }

  .status-row { font-size: 11.5px; }

  .roadmap-row { grid-template-columns: 40px 1fr; row-gap: 8px; }

  .roadmap-row .chip { grid-column: 2; justify-self: start; }

  .footer-grid { flex-direction: column; gap: 24px; }
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .reveal { opacity: 1; transform: none; transition: none; }

  .hero-tick::before { animation: none; }

  .hero-stars { display: none; }
}