/* Ridgeline bundle.css, unchanged except: the two font @imports moved to a <link> in index.html, and the CJK faces are not loaded (no Chinese on this page). */

/* Ridgeline component styles. Every value comes from tokens.css. */

body { margin: 0; background: var(--surface); color: var(--ink); font-family: var(--font-body); font-size: 15px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
::selection { background: var(--gold); color: var(--navy-deep); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; }

/* ---------- Kickers ---------- */
.rl-eyebrow { font-family: var(--font-display); font-style: italic; font-size: 14px; letter-spacing: 0.4em; text-transform: uppercase; color: var(--accent); }
.rl-label { font-size: 11px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--accent); }
.rl-micro { font-size: 10px; letter-spacing: 0.4em; text-transform: uppercase; color: var(--ink-muted); }
.rl-tagline { font-family: var(--font-display); font-style: italic; font-size: 18px; letter-spacing: 0.05em; color: var(--ink-muted); }
.rl-flanked { display: inline-flex; align-items: center; gap: var(--space-3); }
.rl-flanked::before, .rl-flanked::after { content: ""; width: 32px; height: 1px; background: var(--gold); flex: none; }
.rl-tagline.rl-flanked::before, .rl-tagline.rl-flanked::after { opacity: 0.7; }

/* ---------- Display ---------- */
.rl-display { margin: 0; font-family: var(--font-display); font-weight: 300; letter-spacing: -0.005em; color: var(--ink); }
.rl-display--xl { font-size: clamp(36px, 6.5vw, 84px); line-height: 1.05; }
.rl-display--l { font-size: clamp(32px, 5vw, 64px); line-height: 1.15; }
.rl-display--m { font-size: clamp(32px, 5vw, 56px); line-height: 1.15; }
.rl-display em { font-style: italic; font-weight: 400; color: var(--accent-display); }
.rl-sheen {
  background-image: linear-gradient(110deg, var(--accent-display) 30%, var(--sheen-highlight) 50%, var(--accent-display) 70%);
  background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: rl-sheen var(--dur-ambient) var(--ease-in-out) infinite;
}
@keyframes rl-sheen { 0%, 100% { background-position: 0% 0; } 50% { background-position: 100% 0; } }

/* ---------- Nav ----------
   The source transitioned a gradient `background`, which browsers cannot
   interpolate, so the cream→night swap snapped. Here each veil is its own
   layer and the two cross-fade. */
.rl-nav { position: relative; isolation: isolate; display: flex; justify-content: space-between; align-items: center; padding: 26px 56px; color: var(--ink);
  transition: padding var(--dur-base) var(--ease-out-expo), color var(--dur-base) var(--ease-out-expo); }
.rl-nav::before, .rl-nav::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; transition: opacity var(--dur-base) var(--ease-out-expo); }
.rl-nav::before { background: linear-gradient(var(--nav-veil), rgba(0, 0, 0, 0)); }
.rl-nav::after { background: linear-gradient(var(--nav-veil-dark), rgba(6, 22, 41, 0)); opacity: 0; }
.rl-nav.is-scrolled { padding: 16px 56px; }
.rl-nav.is-over-dark { color: var(--cream); }
.rl-nav.is-over-dark, .rl-stage { --focus: var(--gold); }
.rl-nav.is-over-dark::before { opacity: 0; }
.rl-nav.is-over-dark::after { opacity: 1; }
.rl-mark { font-family: var(--font-display); font-size: 21px; font-weight: 500; letter-spacing: 0.22em; text-transform: uppercase; color: inherit; text-decoration: none; }
.rl-mark .dot { color: var(--gold); margin: 0 10px; }
.rl-nav ul { display: flex; gap: 38px; list-style: none; margin: 0; padding: 0; font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase; }

.rl-link { position: relative; color: inherit; text-decoration: none; opacity: 0.75; transition: opacity var(--dur-quick) var(--ease-out-expo); }
.rl-link::after { content: ""; position: absolute; left: 0; bottom: -6px; width: 100%; height: 1px; background: var(--gold); transform: scaleX(0); transform-origin: right center; transition: transform var(--dur-base) var(--ease-out-expo); }
.rl-link:hover, .rl-link:focus-visible { opacity: 1; }
.rl-link:hover::after, .rl-link:focus-visible::after { transform: scaleX(1); transform-origin: left center; }

/* ---------- Button (added; the source has only an email link) ---------- */
.rl-button { position: relative; isolation: isolate; overflow: hidden; display: inline-flex; align-items: center; gap: 14px; padding: 15px 28px; border: 1px solid var(--accent-display); border-radius: var(--radius-none); background: transparent; color: var(--ink); font: inherit; font-size: 11px; letter-spacing: 0.3em; text-transform: uppercase; text-decoration: none; cursor: pointer;
  transition: color var(--dur-base) var(--ease-out-expo), border-color var(--dur-base) var(--ease-out-expo), transform var(--dur-instant) var(--ease-out-expo); }
.rl-button::before { content: ""; position: absolute; inset: 0; z-index: -1; background: var(--ink); transform: scaleY(0); transform-origin: bottom; transition: transform var(--dur-quick) var(--ease-in-quart); }
.rl-button .rl-arrow { display: inline-block; transition: transform var(--dur-base) var(--ease-out-expo); }
.rl-button:hover, .rl-button:focus-visible { color: var(--surface); border-color: var(--ink); }
.rl-button:hover::before, .rl-button:focus-visible::before { transform: scaleY(1); transition: transform var(--dur-base) var(--ease-out-expo); }
.rl-button:hover .rl-arrow, .rl-button:focus-visible .rl-arrow { transform: translateX(4px); }
.rl-button:active { transform: translateY(1px); }
.rl-button--quiet { border-color: transparent; padding-left: 0; padding-right: 0; }
.rl-button--quiet::before { display: none; }
.rl-button--quiet:hover, .rl-button--quiet:focus-visible { color: var(--ink); border-color: transparent; }

/* ---------- Contact link ----------
   The source animated letter-spacing on hover, which reflows the line and
   nudges the centred text sideways. Here the word lifts 2px and the rule
   thickens with a transform; nothing reflows. */
.rl-email { position: relative; display: inline-block; padding-bottom: 8px; font-family: var(--font-display); font-size: clamp(26px, 3.5vw, 40px); font-weight: 400; letter-spacing: 0.02em; color: var(--ink); text-decoration: none;
  transition: color var(--dur-base) var(--ease-out-expo), transform var(--dur-base) var(--ease-out-expo); }
.rl-email::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; transform-origin: bottom;
  background-image: linear-gradient(110deg, var(--accent-display) 30%, var(--sheen-highlight) 50%, var(--accent-display) 70%); background-size: 200% 100%;
  animation: rl-sheen var(--dur-ambient) var(--ease-in-out) infinite; transition: transform var(--dur-base) var(--ease-out-expo); }
.rl-email:hover, .rl-email:focus-visible { color: var(--accent-display); transform: translateY(-2px); }
.rl-email:hover::after, .rl-email:focus-visible::after { transform: scaleY(2); }

/* ---------- Night stage + pillar panel ---------- */
.rl-stage { position: relative; overflow: hidden; color: var(--cream);
  background: linear-gradient(to bottom, var(--sky-top) 0%, var(--navy) 42%, var(--sky-low) 78%, var(--sky-horizon) 100%); }
.rl-stage::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(at 50% 45%, rgba(3, 10, 20, 0) 52%, rgba(3, 10, 20, 0.55) 100%); }
.rl-stage-label { font-size: 10px; letter-spacing: 0.5em; text-transform: uppercase; color: rgba(201, 169, 97, 0.85); }

.rl-panel { position: relative; min-height: 340px; background: linear-gradient(to right, rgba(6, 22, 41, 0) 0%, rgba(6, 22, 41, 0.65) 30%, rgba(6, 22, 41, 0.88) 100%); }
.rl-ghost { position: absolute; right: 0; top: 50%; transform: translateY(-52%); font-family: var(--font-display); font-style: italic; font-weight: 300; font-size: 300px; line-height: 1; color: rgba(201, 169, 97, 0.07); pointer-events: none; user-select: none; transition: opacity var(--dur-slow) var(--ease-out-expo); }

/* Slide hand-off. Source: in and out ran at once, same curve, both moving
   down, so mid-swap two texts overlapped. Now: the old slide exits up,
   fast, on ease-in; the new one waits dur-instant, then enters from below
   on ease-out with its lines staggered. */
.rl-slide { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; opacity: 0; transform: translateY(24px); pointer-events: none;
  transition: opacity var(--dur-quick) var(--ease-in-quart), transform var(--dur-quick) var(--ease-in-quart); }
.rl-slide.is-leaving { transform: translateY(-16px); }
.rl-slide.is-active { opacity: 1; transform: none; pointer-events: auto;
  transition: opacity var(--dur-slow) var(--ease-out-expo) var(--dur-instant), transform var(--dur-slow) var(--ease-out-expo) var(--dur-instant); }
.rl-slide.is-active > * { animation: rl-rise var(--dur-slow) var(--ease-out-expo) both; animation-delay: calc(var(--dur-instant) + var(--i, 0) * var(--stagger-step)); }
@keyframes rl-rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

.rl-numeral { font-family: var(--font-display); font-style: italic; font-size: 80px; font-weight: 300; line-height: 1; color: var(--gold-bright); margin-bottom: var(--space-4); }
.rl-pillar-eyebrow { font-size: 10px; letter-spacing: 0.4em; text-transform: uppercase; color: rgba(243, 236, 221, 0.55); margin-bottom: var(--space-2); }
.rl-pillar-name { font-family: var(--font-display); font-weight: 300; font-size: clamp(40px, 5vw, 68px); line-height: 1; margin: 0 0 28px;
  background-image: linear-gradient(110deg, var(--cream) 38%, #fff6df 50%, var(--cream) 62%); background-size: 240% 100%;
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.rl-slide.is-active .rl-pillar-name { animation: rl-rise var(--dur-slow) var(--ease-out-expo) both, rl-sheen var(--dur-ambient) var(--ease-in-out) 1s infinite; animation-delay: calc(var(--dur-instant) + var(--i, 0) * var(--stagger-step)), 1s; }
.rl-divider { width: 60px; height: 1px; margin-bottom: 28px; background-image: linear-gradient(90deg, var(--gold) 30%, var(--gold-sheen) 50%, var(--gold) 70%); background-size: 200% 100%; }
.rl-slide.is-active .rl-divider { animation: rl-grow var(--dur-slow) var(--ease-out-expo) both, rl-sheen 4s var(--ease-in-out) infinite; animation-delay: calc(var(--dur-instant) + var(--i, 0) * var(--stagger-step)), 1s; transform-origin: left; }
@keyframes rl-grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.rl-pillar-body { font-size: 15px; line-height: 1.9; color: var(--mist); max-width: 440px; margin: 0; }
.rl-pillar-body em { color: var(--gold-bright); }

.rl-rail { display: flex; flex-direction: column; gap: 14px; }
.rl-rail-tick { display: block; width: 24px; height: 1px; background: rgba(243, 236, 221, 0.25); transform-origin: left;
  transition: background-color var(--dur-base) var(--ease-out-expo), transform var(--dur-base) var(--ease-out-expo); }
.rl-rail-tick.is-active { background: var(--gold-bright); transform: scaleX(1.67); }

/* ---------- Thesis columns ---------- */
.rl-columns { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-7); padding-top: 60px; border-top: 1px solid var(--hairline); }
.rl-columns h3 { font-family: var(--font-display); font-weight: 400; font-size: 30px; line-height: 1.25; margin: 0 0 18px; color: var(--ink); }
.rl-columns h3 em { color: var(--accent-display); }
.rl-columns p { margin: 0; font-size: 15px; line-height: 1.85; color: var(--ink-body); }
.rl-columns .rl-label { margin-bottom: 18px; }
@media (max-width: 800px) { .rl-columns { grid-template-columns: 1fr; gap: 50px; } }

/* ---------- Reveal ----------
   Source had two fixed lags (.lag1/.lag2). Here any sibling count staggers
   by --i × stagger-step. */
.rl-reveal { opacity: 0; transform: translateY(36px);
  transition: opacity var(--dur-reveal) var(--ease-out-expo), transform var(--dur-reveal) var(--ease-out-expo);
  transition-delay: calc(var(--i, 0) * var(--stagger-step)); }
.rl-reveal.is-in { opacity: 1; transform: none; }

/* ---------- Section seam (added) ----------
   The source cut hard from cream to night. A seam is a dusk band that
   carries the eye across the change of ground. */
.rl-seam { height: 160px; background: linear-gradient(to bottom, var(--cream) 0%, var(--cream-warm) 22%, var(--sky-horizon) 70%, var(--navy-deep) 100%); }
.rl-seam--up { background: linear-gradient(to top, var(--cream) 0%, var(--cream-warm) 22%, var(--sky-horizon) 70%, var(--navy-deep) 100%); }

/* ---------- Intro veil ---------- */
.rl-veil { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.rl-veil .half { position: absolute; left: 0; right: 0; height: 50.5%; background: var(--navy-deep); transition: transform var(--dur-curtain) var(--ease-in-out); }
.rl-veil .half.top { top: 0; }
.rl-veil .half.bot { bottom: 0; transition-delay: 60ms; }
.rl-veil .vline { position: absolute; top: 50%; left: 50%; height: 1px; width: 0; transform: translate(-50%, -50%); background: linear-gradient(to right, rgba(201, 169, 97, 0), var(--gold-bright), rgba(201, 169, 97, 0)); animation: rl-vline var(--dur-reveal) var(--ease-out-expo) 150ms forwards; }
.rl-veil .vmark { position: absolute; top: calc(50% - 44px); left: 50%; transform: translateX(-50%); font-family: var(--font-display); font-size: 15px; letter-spacing: 0.5em; text-transform: uppercase; color: var(--cream); white-space: nowrap; opacity: 0; animation: rl-fade var(--dur-slow) var(--ease-out-expo) 350ms forwards; }
@keyframes rl-vline { to { width: min(60%, 520px); } }
@keyframes rl-fade { to { opacity: 1; } }
.rl-veil.is-open .half.top { transform: translateY(-101%); }
.rl-veil.is-open .half.bot { transform: translateY(101%); }
.rl-veil.is-open .vline, .rl-veil.is-open .vmark { opacity: 0; animation: none; width: min(60%, 520px); transition: opacity var(--dur-quick) var(--ease-in-quart); }

/* ---------- Chinese (localization) ----------
   Mark content with lang="zh-Hant" (default; Taiwan / Hong Kong) or lang="zh-Hans".
   Latin characters keep Cormorant / Baskerville. Chinese characters fall through to Noto Serif TC or SC. */
:lang(zh-Hans), :lang(zh-CN), :lang(zh-SG) {
  --font-display: "Cormorant Garamond", "Cormorant", Garamond, "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Libre Baskerville", Baskerville, Georgia, "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-cjk: var(--font-cjk-hans);
}
:lang(zh) { font-synthesis: none; line-break: strict; text-autospace: normal; }
/* Chinese has no italic: emphasis keeps its gold, loses the slant. */
:lang(zh) em, :lang(zh) .rl-eyebrow, :lang(zh) .rl-tagline, :lang(zh) .rl-numeral { font-style: normal; }
:lang(zh) p em { font-weight: 500; }
/* Tracking: the Latin 0.22–0.5em spreads characters apart and breaks words up. */
.rl-eyebrow:lang(zh) { font-size: 14px; letter-spacing: 0.2em; }
.rl-label:lang(zh), .rl-micro:lang(zh), .rl-pillar-eyebrow:lang(zh), .rl-stage-label:lang(zh) { font-size: 12px; letter-spacing: 0.12em; font-weight: 500; }
.rl-nav ul:lang(zh) { font-size: 13px; letter-spacing: 0.12em; }
.rl-tagline:lang(zh) { letter-spacing: 0.08em; }
/* Leading: Chinese characters fill the em box. */
.rl-display:lang(zh) { line-height: 1.3; letter-spacing: 0.02em; }
.rl-pillar-name:lang(zh) { line-height: 1.2; }
:lang(zh) p, .rl-pillar-body:lang(zh) { font-size: 16px; line-height: 1.85; letter-spacing: 0.03em; }
.rl-columns h3:lang(zh) { line-height: 1.45; }
.rl-email:lang(zh) { letter-spacing: 0.02em; }
/* Bilingual wordmark: <a class="rl-mark">Ridgeline<span class="dot">·</span><span class="cn" lang="zh-Hant">山脊資本</span></a> */
.rl-mark .cn { font-family: var(--font-cjk); font-size: 18px; font-weight: 500; letter-spacing: 0.05em; text-transform: none; }
@media (max-width: 760px) { .rl-mark .dot { display: none; } .rl-mark .cn { display: block; margin-top: 3px; font-size: 14px; letter-spacing: 0.22em; } }

/* ---------- Reduced motion: every transition above collapses ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; transition-delay: 0ms !important; animation-delay: 0ms !important; }
  .rl-reveal { opacity: 1; transform: none; }
  .rl-sheen { -webkit-text-fill-color: var(--accent-display); background: none; }
  .rl-pillar-name { -webkit-text-fill-color: var(--cream); background: none; }
}