/* SoulFa Shared Styles
   Pages: index, music, gallery, tour, merch, about
   Direction: Film feel. Dark home, cream-paper subpages. */

/* ─── FONTS ─── */
@font-face {
  font-family: 'Cako';
  src: url('Cako-Black.otf') format('opentype');
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'GenRyu';
  src: url('專輯字體/GenRyuMin2TW-R.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'GenRyu';
  src: url('專輯字體/GenRyuMin2TW-M.otf') format('opentype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'GenRyu';
  src: url('專輯字體/GenRyuMin2TW-SB.otf') format('opentype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'GenRyu';
  src: url('專輯字體/GenRyuMin2TW-L.otf') format('opentype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Juana Alt';
  src: url('專輯字體/JUANA ALT REGULAR.TTF') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Juana Alt';
  src: url('專輯字體/JUANA ALT MEDIUM.TTF') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Juana Alt';
  src: url('專輯字體/JUANA ALT SEMIBOLD.TTF') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Juana Alt';
  src: url('專輯字體/JUANA ALT BOLD.TTF') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Dark (home) */
  --film-dark: #13100B;
  --film-dark-2: #1C1810;
  --film-paper: #ECE6D6;
  --film-paper-soft: #B8B0A0;
  --film-amber: #C77B4A;
  --film-rust: #A05050;
  --film-mist: #6B665A;
  --film-edge: rgba(236, 230, 214, 0.18);

  /* Light (subpages) */
  --paper: #E3DDD7;
  --paper-2: #D5CFC8;
  --ink: #1A130B;
  --ink-soft: #4A3F30;
  --ink-mist: #8A7E66;
  --paper-edge: rgba(26, 19, 11, 0.18);
  --paper-amber: #A8542B;
  --paper-rust: #7A2E3B;

  /* Fonts */
  --font-kuhlman: "kuhlman-vf", "Inter", sans-serif;
  --font-gopher: "gopher", "Inter", sans-serif;
  --font-cako: 'Cako', serif;
  --font-juana: 'Juana Alt', serif;
  --font-zh: 'GenRyu', '思源宋體', 'Noto Serif TC', serif;
  --font-mono: 'JetBrains Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--film-dark);
  color: var(--film-paper);
  font-family: var(--font-zh);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.light {
  background: var(--paper);
  color: var(--ink);
}

/* Grain overlay (always present) */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  opacity: 0.12;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='400' height='400'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}
body.light::before { opacity: 0.16; mix-blend-mode: multiply; }

/* Page transition overlay */
.page-transition {
  position: fixed;
  inset: 0;
  background: #0B0907;
  z-index: 99999;
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.55s ease;
}
.page-transition.gone {
  opacity: 0;
  pointer-events: none;
}
.page-transition.coming {
  opacity: 1;
  pointer-events: auto;
}
.page-transition::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='400' height='400'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  mix-blend-mode: overlay;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ─── TOPNAV (shared across all pages) ─── */
nav.top {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 24px 36px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.3s, backdrop-filter 0.3s, padding 0.3s;
}
nav.top.scrolled {
  background: rgba(19, 16, 11, 0.78);
  backdrop-filter: blur(10px);
  padding: 16px 36px;
  border-bottom: 1px solid var(--film-edge);
}
body.light nav.top.scrolled {
  background: rgba(230, 220, 196, 0.85);
  border-bottom: 1px solid var(--paper-edge);
}

nav.top .brand {
  font-family: var(--font-kuhlman);
  font-size: 28px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--film-paper);
  font-variation-settings: 'wdth' 100, 'SEED' 88;
  line-height: 1;
  transition: font-variation-settings 0.5s ease, color 0.2s;
}
body.light nav.top .brand { color: var(--ink); }
nav.top .brand:hover {
  font-variation-settings: 'wdth' 125, 'SEED' 88;
  color: var(--film-amber);
}
body.light nav.top .brand:hover { color: var(--paper-amber); }

nav.top ul {
  list-style: none;
  display: flex;
  gap: 32px;
  margin: 0;
  padding: 0;
  align-items: center;
}
nav.top ul a {
  font-family: var(--font-kuhlman);
  font-weight: 400;
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--film-paper);
  padding: 6px 2px;
  font-variation-settings: 'wdth' 85, 'SEED' 12;
  transition: font-variation-settings 0.45s ease, color 0.2s, letter-spacing 0.3s;
  display: inline-block;
}
body.light nav.top ul a { color: var(--ink); }
nav.top ul a:hover, nav.top ul a.is-active {
  font-variation-settings: 'wdth' 125, 'SEED' 12;
  color: var(--film-amber);
  letter-spacing: 0.24em;
}
body.light nav.top ul a:hover, body.light nav.top ul a.is-active { color: var(--paper-amber); }

/* ─── HAMBURGER TOGGLE (desktop: hidden) ─── */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 4px;
  color: inherit;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: currentColor;
  transition:
    transform 0.32s cubic-bezier(0.22, 0.61, 0.36, 1),
    opacity   0.28s ease,
    width     0.28s ease;
  transform-origin: center;
}
nav.top.open .nav-toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
nav.top.open .nav-toggle span:nth-child(2) { opacity: 0; width: 0; }
nav.top.open .nav-toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 720px) {
  /* ── Nav bar ── */
  .nav-toggle        { display: flex; }
  nav.top            { padding: 18px 20px; flex-wrap: nowrap; gap: 0; }
  nav.top.scrolled   { padding: 14px 20px; }
  nav.top .brand     { font-size: 22px; letter-spacing: 0.12em; flex: 1; }

  /* ── Fullscreen menu overlay (slides down from below nav bar) ── */
  /* position: absolute (not fixed) so backdrop-filter on scrolled nav
     doesn't create a new containing block and break the overlay */
  nav.top ul {
    position: absolute;
    top: 58px; left: 0; right: 0; height: 100dvh;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 36px;
    flex-wrap: nowrap;
    background: rgba(11, 9, 7, 0.97);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    z-index: 9400;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition:
      opacity   0.32s ease,
      transform 0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
  }
  nav.top.open { z-index: 9500 !important; } /* above all page elements */
  nav.top.open ul {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  nav.top.open ul a {
    font-size: 22px !important;
    letter-spacing: 0.2em !important;
    color: #ECE6D6 !important;
    padding: 10px 20px;
    font-variation-settings: 'wdth' 85, 'SEED' 12 !important;
    border-bottom: none !important;
  }
  nav.top.open ul a:hover,
  nav.top.open ul a.is-active {
    color: #C77B4A !important;
    letter-spacing: 0.26em !important;
    font-variation-settings: 'wdth' 125, 'SEED' 12 !important;
    border-bottom: 1px solid #C77B4A !important;
  }

  /* ── Shared section / footer ── */
  section.scene { padding: 90px 20px 60px; }
  footer        { padding: 48px 20px 32px; }
  .footer-inner { gap: 24px; }
  .footer-logo  { height: 60px; }
}

/* ─── SHELL ─── */
section.scene {
  padding: 130px 36px 100px;
  min-height: 100vh;
  position: relative;
}
.container { max-width: 1180px; margin: 0 auto; }
.container.narrow { max-width: 880px; }

.section-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--film-amber);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 16px;
}
body.light .section-tag { color: var(--paper-amber); }
.section-tag::before {
  content: '';
  width: 44px;
  height: 1px;
  background: currentColor;
}

.section-title {
  font-family: var(--font-cako);
  font-size: clamp(56px, 9vw, 104px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0 0 56px;
  color: var(--film-paper);
}
body.light .section-title { color: var(--ink); }

/* ─── SHARED BUTTON ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border: 1px solid var(--film-paper);
  font-family: var(--font-gopher);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--film-paper);
  background: transparent;
  transition: all 0.25s;
  cursor: pointer;
}
body.light .btn { border-color: var(--ink); color: var(--ink); }
.btn:hover { background: var(--film-paper); color: var(--film-dark); }
body.light .btn:hover { background: var(--ink); color: var(--paper); }
.btn.filled { background: var(--film-paper); color: var(--film-dark); }
body.light .btn.filled { background: var(--ink); color: var(--paper); }
.btn.filled:hover { background: var(--film-amber); border-color: var(--film-amber); color: var(--film-dark); }
body.light .btn.filled:hover { background: var(--paper-amber); border-color: var(--paper-amber); color: var(--paper); }

/* ─── FOOTER (shared) ─── */
footer {
  padding: 64px 36px 40px;
  background: var(--film-dark);
  border-top: 1px solid var(--film-edge);
}
body.light footer { background: var(--paper-2); border-top: 1px solid var(--paper-edge); }
.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 32px;
}
.footer-brand {
  font-family: var(--font-kuhlman);
  font-size: 22px;
  color: var(--film-paper);
  font-variation-settings: 'wdth' 100, 'SEED' 88;
  letter-spacing: 0.14em;
}
body.light .footer-brand { color: var(--ink); }

/* SoulFa script logo — inline SVG, colour via currentColor on parent */
.footer-logo-link {
  display: inline-block;
  line-height: 0;
  transition: transform 0.3s ease;
}
.footer-logo-link:hover { transform: translateY(-2px) scale(1.02); }
.footer-logo {
  display: block;
  height: 80px;
  width: auto;
}
.footer-logo path { fill: currentColor; }

.footer-socials { display: flex; gap: 16px; }
.footer-socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  padding: 4px;
  color: var(--film-paper);
  transition: color 0.25s, transform 0.25s;
}
body.light .footer-socials a { color: var(--ink); }
.footer-socials a:hover {
  color: var(--film-amber);
  transform: translateY(-2px);
}
body.light .footer-socials a:hover { color: var(--paper-amber); }
.footer-socials svg { width: 22px; height: 22px; }

/* Per-page logo colour (footer) */
body.home .footer-logo,
body.home .footer-logo-link    { color: #ECE6D6; }
body.orange .footer-logo,
body.orange .footer-logo-link  { color: #dee89b; }
body.merch .footer-logo,
body.merch .footer-logo-link   { color: #1A1A1A; }
body.about .footer-logo,
body.about .footer-logo-link   { color: #e1dccd; }
.footer-legal {
  max-width: 1180px;
  margin: 32px auto 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--film-mist);
  text-transform: uppercase;
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--film-edge);
}
body.light .footer-legal { color: var(--ink-mist); border-top: 1px solid var(--paper-edge); }

/* ─── REVEAL (Apple-style: gentle slow ease-out) ─── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 0.88s cubic-bezier(0.22, 0.61, 0.36, 1),
    transform 0.88s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.reveal.in { opacity: 1; transform: translateY(0); }