:root,
html[data-theme="dark"] {
  --bg: #17120f;
  --bg-soft: #211a16;
  --surface: rgba(51, 41, 34, .82);
  --surface-2: rgba(62, 50, 42, .92);
  --surface-3: #30261f;
  --surface-solid: #271f1a;
  --surface-elevated: #382c25;
  --input: rgba(255, 244, 227, .055);
  --glass: rgba(31, 24, 20, .82);
  --line: rgba(236, 217, 192, .13);
  --line-strong: rgba(236, 217, 192, .22);
  --text: #f7eedf;
  --muted: #c9b9a3;
  --soft: #998875;
  --track: rgba(245, 226, 200, .075);
  --accent: #5f95c2;
  --accent-2: #8bb9dc;
  --accent-3: #bd8b62;
  --accent-soft: rgba(95, 149, 194, .15);
  --success: #7eb693;
  --warning: #dbb36d;
  --danger: #d98278;
  --gold: #d7b47b;
  --danger-text: #ffd3cd;
  --warning-text: #ffe2aa;
  --theme-color: #17120f;
  --ease-out: cubic-bezier(.2, .8, .2, 1);
  --ease-spring: cubic-bezier(.2, 1.15, .35, 1);
  --shadow: 0 24px 80px rgba(15, 9, 6, .48);
  --shadow-soft: 0 12px 36px rgba(15, 9, 6, .28);
}

html[data-theme="light"] {
  --bg: #f3ebdd;
  --bg-soft: #e8dcc9;
  --surface: rgba(255, 250, 241, .84);
  --surface-2: rgba(255, 252, 246, .95);
  --surface-3: #eadbc7;
  --surface-solid: #fffaf2;
  --surface-elevated: #fffdf8;
  --input: rgba(79, 56, 38, .055);
  --glass: rgba(247, 238, 225, .84);
  --line: rgba(82, 61, 44, .14);
  --line-strong: rgba(82, 61, 44, .24);
  --text: #2b211b;
  --muted: #66584c;
  --soft: #82705f;
  --track: rgba(80, 58, 40, .09);
  --accent: #2f6f9d;
  --accent-2: #4e8cb9;
  --accent-3: #976b49;
  --accent-soft: rgba(47, 111, 157, .12);
  --success: #447b5b;
  --warning: #9a6b22;
  --danger: #a94e47;
  --gold: #936b2f;
  --danger-text: #812f2b;
  --warning-text: #704b13;
  --theme-color: #f3ebdd;
  --shadow: 0 22px 70px rgba(79, 55, 36, .16);
  --shadow-soft: 0 12px 34px rgba(79, 55, 36, .10);
}

html,
body {
  transition: background-color .28s var(--ease-out), color .22s var(--ease-out);
}

.ambient-wave-a {
  background: linear-gradient(90deg, transparent 4%, rgba(189, 139, 98, .26) 28%, rgba(95, 149, 194, .24) 58%, rgba(215, 180, 123, .17) 78%, transparent 96%);
}
.ambient-wave-b {
  background: linear-gradient(90deg, transparent 6%, rgba(95, 149, 194, .14) 27%, rgba(189, 139, 98, .19) 55%, rgba(139, 185, 220, .16) 76%, transparent 95%);
}
.ambient-wave-c {
  background: linear-gradient(90deg, transparent 5%, rgba(189, 139, 98, .15) 29%, rgba(215, 180, 123, .17) 52%, rgba(95, 149, 194, .17) 77%, transparent 96%);
}

/* Override literal legacy purple/pink glows left in the base stylesheet. */
.auth-card::before {
  background: radial-gradient(circle, rgba(95, 149, 194, .17), rgba(189, 139, 98, .08) 44%, transparent 70%);
}
.hero-card::before {
  background: linear-gradient(105deg, transparent, rgba(189, 139, 98, .19), rgba(95, 149, 194, .18), rgba(215, 180, 123, .12), transparent);
}
.hero-card::after {
  background: radial-gradient(circle, rgba(95, 149, 194, .15), rgba(189, 139, 98, .08) 48%, transparent 70%);
}
.summary-card::before {
  background: linear-gradient(118deg, transparent 30%, rgba(189, 139, 98, .09), rgba(95, 149, 194, .08), transparent 72%);
}

.brand-mark {
  padding: 0 !important;
  background-color: transparent !important;
  background-image: url('./assets/brand/navbar-logo.webp') !important;
  background-size: contain !important;
  background-repeat: no-repeat !important;
  background-position: center !important;
  box-shadow: none !important;
  border: 0 !important;
  border-radius: 0 !important;
}
.brand-mark > span { opacity: 0 !important; }

.btn-primary {
  background: linear-gradient(125deg, #76553f 0%, #9c7456 42%, var(--accent) 100%);
  box-shadow: 0 12px 32px rgba(47, 111, 157, .20);
}
.btn-primary:hover:not(:disabled) { box-shadow: 0 16px 38px rgba(47, 111, 157, .28); }

:where(.btn, .theme-toggle, .profile-chip, .action-card, .hero-card, .summary-card, .host-card, .category, .challenge-row, .leader-row, .album-item, .payment-gate, .prize-panel, .prize-chip, .evidence-thumb, .file-label, .mode-toggle button, .bottom-nav button, .icon-btn, .story-launch, .legal-card) {
  transition-property: transform, opacity, background-color, border-color, box-shadow, color, filter;
  transition-duration: .18s;
  transition-timing-function: var(--ease-out);
}

:where(.action-card, .host-card, .album-item, .leader-row):hover {
  border-color: color-mix(in srgb, var(--accent), var(--line) 68%);
}

.category .challenge-list {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  overflow: hidden;
  visibility: hidden;
  pointer-events: none;
  transition: grid-template-rows .36s var(--ease-out), opacity .22s var(--ease-out), visibility 0s linear .36s;
}
.category .challenge-list > .challenge-list-inner {
  min-height: 0;
  overflow: hidden;
}
.category.open .challenge-list,
.category.search-open .challenge-list {
  grid-template-rows: 1fr;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: grid-template-rows .36s var(--ease-out), opacity .22s var(--ease-out), visibility 0s;
}

.modal-backdrop { animation: pieFade .18s var(--ease-out) both; }
.modal-enter { animation: pieLift .25s var(--ease-spring) both; }
.surface-enter { animation: pieLift .28s var(--ease-out) both; }
.photo-preview img,
.album-item img { transition: transform .32s var(--ease-out), filter .25s var(--ease-out); }
.album-item:hover img { transform: scale(1.018); }

body.checkout-open { overflow: hidden; }
.embedded-checkout-backdrop {
  align-items: flex-start;
  overflow-y: auto;
  padding: max(18px, env(safe-area-inset-top)) 12px max(22px, env(safe-area-inset-bottom));
}
.embedded-checkout-modal {
  width: min(100%, 620px);
  max-height: none;
  margin: auto;
  border-color: color-mix(in srgb, var(--accent), var(--line) 42%);
  background: color-mix(in srgb, var(--surface-solid), transparent 2%);
  box-shadow: var(--shadow);
}
.embedded-checkout-copy { margin: -2px 0 14px; }
.embedded-checkout-slot {
  min-height: 310px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-elevated);
  transition: min-height .22s var(--ease-out), border-color .18s var(--ease-out), box-shadow .18s var(--ease-out);
}
.checkout-loading {
  min-height: 290px;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: .86rem;
}

@keyframes pieFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes pieLift { from { opacity: 0; transform: translateY(10px) scale(.985); } to { opacity: 1; transform: none; } }

@media (max-width: 640px) {
  .embedded-checkout-backdrop { padding-inline: 8px; }
  .embedded-checkout-modal { width: 100%; border-radius: 24px; }
  .embedded-checkout-slot { padding: 4px; border-radius: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .ambient-wave { animation: none !important; }
}