/* ============================================================
   INTRO/MAKER — modern glass UI
   Dark, layered, translucent surfaces; cinematic serif identity.
   ============================================================ */

:root {
  --serif: "Playfair Display", "Didot", Georgia, serif;
  --sans: "Archivo", "Helvetica Neue", Arial, sans-serif;
}

/* palettes */
body[data-theme="burgundy"], body:not([data-theme]) {
  --bg: #120a0d;
  --glow-a: rgba(212, 162, 78, 0.14);
  --glow-b: rgba(109, 31, 44, 0.5);
  --panel: #6d1f2c;
  --ink: #f6ede2;
  --ink-soft: #c9b4a4;
  --accent: #d4a24e;
}
body[data-theme="gold"] {
  --bg: #15100a;
  --glow-a: rgba(201, 163, 94, 0.16);
  --glow-b: rgba(120, 96, 55, 0.4);
  --panel: #efe6d4;
  --ink: #f4ecdd;
  --ink-soft: #cbbb9e;
  --accent: #c9a35e;
}
body[data-theme="forest"] {
  --bg: #0a120e;
  --glow-a: rgba(207, 227, 211, 0.1);
  --glow-b: rgba(30, 77, 56, 0.55);
  --panel: #1e4d38;
  --ink: #eef4ee;
  --ink-soft: #b3c8ba;
  --accent: #b7d9c1;
}
body[data-theme="slate"] {
  --bg: #0d1316;
  --glow-a: rgba(201, 163, 94, 0.12);
  --glow-b: rgba(83, 110, 122, 0.5);
  --panel: #536e7a;
  --ink: #eef3f5;
  --ink-soft: #b4c4cb;
  --accent: #c9a35e;
}

/* derived surfaces */
body {
  --glass: rgba(255, 255, 255, 0.045);
  --glass-strong: rgba(255, 255, 255, 0.07);
  --edge: rgba(255, 255, 255, 0.09);
  --edge-strong: rgba(255, 255, 255, 0.16);
  --field-bg: rgba(0, 0, 0, 0.28);
  --ring: color-mix(in srgb, var(--accent) 35%, transparent);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background:
    radial-gradient(900px 600px at 12% -6%, var(--glow-a), transparent 60%),
    radial-gradient(1100px 800px at 105% 30%, var(--glow-b), transparent 65%),
    var(--bg);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--sans);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.6s ease, color 0.6s ease;
}

::selection { background: color-mix(in srgb, var(--accent) 40%, transparent); }

/* ---------- watermark backdrop ---------- */
.watermark {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.watermark span {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(10rem, 36vw, 32rem);
  letter-spacing: -0.02em;
  color: color-mix(in srgb, var(--accent) 5%, transparent);
  white-space: nowrap;
  line-height: 1;
  transform: translateY(-6%);
  user-select: none;
}

/* ---------- masthead ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem clamp(1.2rem, 4vw, 3rem);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border-bottom: 1px solid var(--edge);
}

.byline-chip {
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.byline-chip b { color: var(--accent); font-weight: 800; }

.masthead-nav { display: flex; gap: 0.55rem; }
.theme-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.25);
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.theme-dot:hover {
  transform: scale(1.18);
  border-color: #fff;
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.08);
}
.theme-dot[data-set-theme="burgundy"] { background: #6d1f2c; }
.theme-dot[data-set-theme="gold"]     { background: #c9a35e; }
.theme-dot[data-set-theme="forest"]   { background: #1e4d38; }
.theme-dot[data-set-theme="slate"]    { background: #536e7a; }

/* ---------- section head ---------- */
.create-section {
  position: relative;
  z-index: 1;
  max-width: 1160px;
  margin: 0 auto;
  padding: clamp(1.8rem, 5vh, 3.5rem) clamp(1.2rem, 4vw, 2.5rem) 4rem;
}

.section-head { text-align: center; margin-bottom: 2.4rem; }
.section-kicker {
  font-weight: 700;
  letter-spacing: 0.3em;
  font-size: 0.74rem;
  color: var(--accent);
  margin-bottom: 0.7rem;
}
.section-title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(2.4rem, 7vw, 4rem);
  line-height: 1;
  letter-spacing: 0.01em;
}
.section-sub {
  margin-top: 0.9rem;
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 52ch;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- creator layout ---------- */
.creator {
  display: grid;
  grid-template-columns: minmax(280px, 400px) 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 840px) {
  .creator { grid-template-columns: 1fr; }
}

.creator-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--glass);
  backdrop-filter: blur(22px) saturate(1.25);
  -webkit-backdrop-filter: blur(22px) saturate(1.25);
  border: 1px solid var(--edge);
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
}

.field { display: flex; flex-direction: column; gap: 0.45rem; }
.field span {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
}
.field span em { font-style: normal; opacity: 0.65; letter-spacing: 0.06em; text-transform: none; }
.field span b { color: var(--accent); }

.field input[type="text"],
.field input[type="password"],
.field select,
#presetSelect {
  width: 100%;
  background: var(--field-bg);
  color: var(--ink);
  border: 1px solid var(--edge);
  border-radius: 13px;
  font-family: var(--sans);
  font-size: 0.95rem;
  padding: 0.72rem 0.9rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  appearance: none;
}
.field select, #presetSelect {
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%),
    linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%);
  background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%;
  background-size: 6px 6px;
  background-repeat: no-repeat;
  cursor: pointer;
}
.field input:focus, .field select:focus, #presetSelect:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--ring);
}
.field input::placeholder { color: var(--ink-soft); opacity: 0.55; }

.field input[type="file"] { font-size: 0.8rem; color: var(--ink-soft); }
.field input[type="file"]::file-selector-button {
  background: var(--glass-strong);
  color: var(--accent);
  border: 1px solid var(--edge-strong);
  border-radius: 999px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 0.45rem 1rem;
  margin-right: 0.7rem;
  cursor: pointer;
  transition: border-color 0.2s ease;
}
.field input[type="file"]::file-selector-button:hover { border-color: var(--accent); }

/* chips */
.chip-row { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  background: var(--glass-strong);
  color: var(--ink-soft);
  border: 1px solid var(--edge);
  border-radius: 999px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  padding: 0.42rem 0.9rem;
  cursor: pointer;
  transition: all 0.18s ease;
}
.chip:hover { border-color: var(--accent); color: var(--ink); transform: translateY(-1px); }
.chip.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 700;
}

/* scene gallery */
.bg-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(58px, 1fr));
  gap: 0.5rem;
}
.bg-thumb {
  aspect-ratio: 1;
  border-radius: 12px;
  border: 1.5px solid var(--edge);
  background: var(--field-bg) center / cover no-repeat;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  font-family: var(--sans);
  font-weight: 800;
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}
.bg-thumb:hover { border-color: var(--accent); transform: translateY(-2px) scale(1.04); }
.bg-thumb.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--ring);
}

/* fine-tune drawer */
.fine-tune {
  border: 1px solid var(--edge);
  border-radius: 16px;
  padding: 0.7rem 1rem;
  background: rgba(0, 0, 0, 0.14);
}
.fine-tune summary {
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  list-style-position: inside;
  transition: color 0.2s ease;
}
.fine-tune summary:hover { color: var(--accent); }
.fine-tune .field { margin-top: 0.85rem; }

/* buttons */
.creator-actions { display: flex; gap: 0.7rem; }
.creator-btn {
  flex: 1;
  background: var(--glass-strong);
  color: var(--accent);
  border: 1px solid var(--edge-strong);
  border-radius: 14px;
  font-family: var(--sans);
  font-weight: 800;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  padding: 0.85rem 0.5rem;
  cursor: pointer;
  transition: all 0.18s ease;
}
.creator-btn:hover {
  border-color: var(--accent);
  color: var(--ink);
  transform: translateY(-1px);
}
.creator-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
.creator-btn.primary:hover { filter: brightness(1.1); }
.creator-btn.auto {
  flex: 2;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #ffffff));
  border: none;
  color: var(--bg);
  font-size: 0.9rem;
  padding: 1rem 0.5rem;
  box-shadow: 0 10px 30px color-mix(in srgb, var(--accent) 35%, transparent);
}
.creator-btn.auto:hover { transform: translateY(-2px); filter: brightness(1.06); }
.creator-btn:disabled { opacity: 0.5; cursor: wait; transform: none; }

.creator-status {
  min-height: 1.2rem;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}
.creator-status.error { color: #ff9a8a; }

/* stage */
.creator-stage {
  position: sticky;
  top: 84px;
  background: var(--glass);
  backdrop-filter: blur(22px) saturate(1.25);
  -webkit-backdrop-filter: blur(22px) saturate(1.25);
  border: 1px solid var(--edge);
  border-radius: 24px;
  padding: 1.1rem;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
}
#introCanvas {
  display: block;
  max-width: 100%;
  max-height: 74vh;
  width: auto;
  height: auto;
  margin: 0 auto;
  border-radius: 14px;
  background: #000;
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2.6rem 1.2rem 3.2rem;
  border-top: 1px solid var(--edge);
}
.footer-mark {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}
.footer-note { font-size: 0.74rem; letter-spacing: 0.06em; color: var(--ink-soft); }

@keyframes rise { to { opacity: 1; transform: translateY(0); } }

@media (max-width: 560px) {
  .watermark span { font-size: 44vw; }
  .creator-stage { position: static; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01s !important; transition-duration: 0.01s !important; }
}