/* =========================================================================
   DJS Tour · 獨角獸旅遊 — Design Tokens
   Premium OTA for Iceland adventure travel · Mandarin-speaking market
   ========================================================================= */

/* ---- Webfonts (Latin self-hosted; Chinese via Google Fonts CDN)
       繁體 (TC) for Taiwan / Hong Kong · 简体 (SC) for Mainland / Singapore.
       Both faces are by the same designer (Adobe Source Han / Google Noto),
       so they sit visually identical alongside Sora/Manrope. */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700&family=Noto+Sans+SC:wght@400;500;700&family=LXGW+WenKai+TC&family=LXGW+WenKai&display=swap');

@font-face {
  font-family: 'Sora';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('./fonts/Sora-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Sora';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('./fonts/Sora-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Sora';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('./fonts/Sora-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Sora';
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  src: url('./fonts/Sora-700.woff2') format('woff2');
}
@font-face {
  font-family: 'Manrope';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('./fonts/Manrope-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Manrope';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('./fonts/Manrope-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Manrope';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('./fonts/Manrope-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Manrope';
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  src: url('./fonts/Manrope-700.woff2') format('woff2');
}

:root {
  /* =====================================================================
     COLOR — Brand
     The brand reads BRIGHT. Backgrounds are near-white with cool tints.
     Vibrancy comes from gradient washes layered behind frosted-glass cards,
     not from saturated UI chrome.
     ===================================================================== */

  /* Aurora gradient (primary) — green → cyan */
  --aurora-green:    #2EFFB8;   /* electric aurora */
  --aurora-mint:     #5BFFD0;   /* lighter step */
  --aurora-cyan:     #00D5FF;   /* neon cyan */
  --aurora-deep:     #00A3D1;   /* darker cyan, for text-on-gradient */
  --gradient-aurora: linear-gradient(120deg, #2EFFB8 0%, #00D5FF 100%);
  --gradient-aurora-soft: linear-gradient(120deg, #BDFFE7 0%, #B5F0FF 100%);

  /* Midnight-sun gradient (secondary) — violet → orange */
  --sun-violet:      #6B2FE6;
  --sun-magenta:     #B331E2;
  --sun-orange:      #FF7A2E;
  --sun-amber:       #FFB347;
  --gradient-sun:    linear-gradient(120deg, #6B2FE6 0%, #B331E2 45%, #FF7A2E 100%);
  --gradient-sun-soft: linear-gradient(120deg, #D9C9FF 0%, #FFD3A8 100%);

  /* Glacier mist (tertiary, for hover overlays + alt heros) — lavender → peach */
  --gradient-mist:   linear-gradient(135deg, #E8E2FF 0%, #FFE9D6 50%, #DBF7FF 100%);

  /* Accents */
  --coral:           #FF5A6A;   /* primary interactive accent */
  --coral-press:     #E63E50;
  --lime:            #C6FF3F;   /* badge / supplier-filter accent */
  --lime-deep:       #9EE800;

  /* =====================================================================
     COLOR — Base / Neutral
     Cool-tinted near-whites; charcoal foreground (NOT pure black).
     ===================================================================== */
  --base-0:          #FFFFFF;   /* card surface */
  --base-50:         #FAFBFE;   /* page background */
  --base-100:        #F1F4FA;   /* subtle fill */
  --base-200:        #E4E9F2;   /* hairline / divider on light */
  --base-300:        #C9D2E1;   /* disabled / placeholder bg */
  --base-400:        #99A4B8;   /* placeholder text */
  --base-500:        #6B7689;   /* secondary text */
  --base-700:        #2E3647;   /* primary text */
  --base-900:        #11151F;   /* heaviest text — used sparingly */

  /* Semantic foregrounds */
  --fg-1:            var(--base-900);   /* headings */
  --fg-2:            var(--base-700);   /* body */
  --fg-3:            var(--base-500);   /* secondary */
  --fg-4:            var(--base-400);   /* placeholder / disabled */
  --fg-on-grad:      #FFFFFF;           /* text over gradient */
  --fg-on-glass:     var(--base-900);   /* text over frosted card */

  /* Semantic backgrounds */
  --bg-page:         var(--base-50);
  --bg-card:         var(--base-0);
  --bg-subtle:       var(--base-100);

  /* Elevated surfaces (cards, nav, inputs) — remapped per site theme */
  --surface-card:    var(--bg-card);
  --surface-soft:    #F4F7FB;
  --surface-nav:     rgba(255, 255, 255, 0.72);
  --surface-menu:    rgba(255, 255, 255, 0.96);
  --surface-field:   var(--base-0);
  --surface-chrome:  var(--base-0);
  --border-subtle:   rgba(20, 30, 60, 0.08);
  --border-field:    var(--base-200);

  /* Glass surfaces — used over gradient backdrops.
     ALWAYS pair with backdrop-filter: blur(20-30px) + a 1px inner border. */
  --glass-strong:    rgba(255, 255, 255, 0.72);
  --glass-medium:    rgba(255, 255, 255, 0.55);
  --glass-light:     rgba(255, 255, 255, 0.32);
  --glass-tint:      rgba(255, 255, 255, 0.18);   /* on dark gradient sections */
  --glass-border:    rgba(255, 255, 255, 0.55);
  --glass-border-soft: rgba(255, 255, 255, 0.28);

  /* Status / system */
  --success:         #16C683;
  --success-soft:    #D6F7E8;
  --warning:         #FFB347;
  --warning-soft:    #FFEBC9;
  --danger:          #FF4D5E;
  --danger-soft:     #FFD8DD;
  --info:            #00D5FF;
  --info-soft:       #CFF4FF;

  /* =====================================================================
     TYPE
     Latin: Sora (display) + Manrope (text)
     Chinese (TC): Noto Sans TC for UI, LXGW WenKai TC for editorial quotes
     ===================================================================== */
  /* Default font stacks list Traditional Chinese first, Simplified second.
     When localising for Mainland, set [lang="zh-Hans"] on <html> to swap
     the Han priority via the rules at the bottom of this file. */
  --font-display:    'Sora', 'Noto Sans TC', 'Noto Sans SC', system-ui, sans-serif;
  --font-text:       'Manrope', 'Noto Sans TC', 'Noto Sans SC', system-ui, sans-serif;
  --font-han-display:'Noto Sans TC', 'Noto Sans SC', 'Sora', system-ui, sans-serif;
  --font-han-quote:  'LXGW WenKai TC', 'LXGW WenKai', 'Noto Sans TC', 'Noto Sans SC', serif;
  --font-mono:       'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Type scale — designed for 1440 desktop; rescale at breakpoints */
  --t-display-1:     clamp(56px, 7vw, 96px);   /* hero billboard */
  --t-display-2:     clamp(40px, 5vw, 64px);   /* page hero */
  --t-h1:            40px;
  --t-h2:            32px;
  --t-h3:            24px;
  --t-h4:            20px;
  --t-body-lg:       18px;
  --t-body:          16px;
  --t-body-sm:       14px;
  --t-caption:       12px;
  --t-overline:      11px;

  --lh-tight:        1.08;
  --lh-snug:         1.22;
  --lh-normal:       1.5;
  --lh-loose:        1.7;

  --tracking-tight:  -0.02em;
  --tracking-normal: -0.005em;
  --tracking-wide:   0.08em;     /* overlines, badges */

  /* =====================================================================
     SPACING (4-pt grid)
     ===================================================================== */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* =====================================================================
     RADIUS — generous, soft. Pills for chips/CTAs; 20–28 for cards.
     ===================================================================== */
  --r-xs:    6px;
  --r-sm:    10px;
  --r-md:    14px;
  --r-lg:    20px;
  --r-xl:    28px;
  --r-2xl:   40px;
  --r-pill:  999px;

  /* =====================================================================
     SHADOWS — soft, cool-tinted. Glass cards get a TIGHT inner ring + a
     diffuse cool drop-shadow. Never use pure-black shadows.
     ===================================================================== */
  --shadow-1: 0 1px 2px rgba(20, 30, 60, 0.06);
  --shadow-2: 0 4px 14px rgba(20, 30, 60, 0.08);
  --shadow-3: 0 12px 32px rgba(20, 30, 60, 0.12);
  --shadow-4: 0 24px 60px rgba(20, 30, 60, 0.18);
  --shadow-glow-aurora: 0 12px 40px rgba(0, 213, 255, 0.35),
                        0 4px 14px rgba(46, 255, 184, 0.25);
  --shadow-glow-sun:    0 12px 40px rgba(255, 122, 46, 0.32),
                        0 4px 14px rgba(107, 47, 230, 0.22);
  --ring-glass:    inset 0 0 0 1px rgba(255, 255, 255, 0.55);
  --ring-glass-soft: inset 0 0 0 1px rgba(255, 255, 255, 0.28);
  --ring-focus:    0 0 0 3px rgba(0, 213, 255, 0.45);

  /* Site theme aliases (overridden per html[data-site-theme]) */
  --brand-surface:     linear-gradient(180deg, #FAFBFE 0%, #F1F4FA 100%);
  --brand-footer:      linear-gradient(180deg, #FAFBFE 0%, #E8E2FF 100%);
  --brand-panel:       linear-gradient(135deg, #DBF7FF 0%, #E8E2FF 60%, #FFD3A8 100%);
  --brand-on-gradient: #062F2A;
  --brand-headline-1:  #11151F;
  --brand-headline-2:  #11151F;
  --brand-headline-accent: #0A3D52;
  --brand-overline:      #9E2E45;
  --brand-selection:     rgba(46, 255, 184, 0.4);

  /* =====================================================================
     MOTION
     ===================================================================== */
  --ease-out:      cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out:   cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast:      140ms;
  --dur-base:      220ms;
  --dur-slow:      420ms;

  /* =====================================================================
     LAYOUT
     ===================================================================== */
  --container-max: 1200px;
  --container-wide:1440px;
  --gutter:        24px;
}

@media (max-width: 900px) {
  :root {
    --t-h1: 32px;
    --t-h2: 26px;
    --t-h3: 20px;
    --gutter: 20px;
  }
}

@media (max-width: 640px) {
  :root {
    --t-h1: 28px;
    --t-h2: 22px;
    --t-h4: 18px;
    --t-body-lg: 16px;
    --gutter: 16px;
  }
}

/* =========================================================================
   Semantic element styles — opt-in via class to avoid global pollution
   ========================================================================= */

.auralis-type {
  font-family: var(--font-text);
  color: var(--fg-2);
  font-size: var(--t-body);
  line-height: var(--lh-normal);
  letter-spacing: var(--tracking-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.h-display-1, .h-display-2, .h1, .h2, .h3, .h4 {
  font-family: var(--font-display);
  color: var(--fg-1);
  letter-spacing: var(--tracking-tight);
  line-height: var(--lh-tight);
  margin: 0;
  font-weight: 600;
  text-wrap: balance;
}
.h-display-1 { font-size: var(--t-display-1); font-weight: 700; letter-spacing: -0.03em; }
.h-display-2 { font-size: var(--t-display-2); font-weight: 700; }
.h1 { font-size: var(--t-h1); }
.h2 { font-size: var(--t-h2); }
.h3 { font-size: var(--t-h3); line-height: var(--lh-snug); }
.h4 { font-size: var(--t-h4); line-height: var(--lh-snug); }

.body-lg { font: 500 var(--t-body-lg)/var(--lh-normal) var(--font-text); color: var(--fg-2); }
.body    { font: 400 var(--t-body)/var(--lh-normal) var(--font-text); color: var(--fg-2); }
.body-sm { font: 400 var(--t-body-sm)/var(--lh-normal) var(--font-text); color: var(--fg-3); }
.caption { font: 500 var(--t-caption)/1.4 var(--font-text); color: var(--fg-3); }
.overline {
  font: 600 var(--t-overline)/1 var(--font-text);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--fg-3);
}
.quote-zh {
  font-family: var(--font-han-quote);
  font-size: var(--t-h3);
  line-height: var(--lh-loose);
  color: var(--fg-1);
}

/* =========================================================================
   Backdrop helpers — vibrant gradient washes for full-bleed sections
   ========================================================================= */
/* Locale-aware Han fallback overrides — Simplified content uses Noto Sans SC
   (and LXGW WenKai) ahead of the Traditional variants. */
:lang(zh-Hans) {
  --font-display:     'Sora', 'Noto Sans SC', 'Noto Sans TC', system-ui, sans-serif;
  --font-text:        'Manrope', 'Noto Sans SC', 'Noto Sans TC', system-ui, sans-serif;
  --font-han-display: 'Noto Sans SC', 'Noto Sans TC', 'Sora', system-ui, sans-serif;
  --font-han-quote:   'LXGW WenKai', 'LXGW WenKai TC', 'Noto Sans SC', serif;
}

.bg-aurora { background: var(--gradient-aurora); }
.bg-sun    { background: var(--gradient-sun); }
.bg-mist   { background: var(--gradient-mist); }

/* =========================================================================
   Site-wide theme — html[data-site-theme] set once per tab (see applySiteTheme)
   Remaps --gradient-aurora / --bg-page so all screens share the same palette.
   ========================================================================= */
html[data-site-theme="aurora"] {
  --gradient-aurora: linear-gradient(120deg, #2EFFB8 0%, #00D5FF 100%);
  --gradient-aurora-soft: linear-gradient(120deg, #BDFFE7 0%, #B5F0FF 100%);
  --shadow-glow-aurora: 0 12px 40px rgba(0, 213, 255, 0.35), 0 4px 14px rgba(46, 255, 184, 0.25);
  --bg-page: #FAFBFE;
  --bg-subtle: #F1F4FA;
  --brand-surface: linear-gradient(180deg, #FAFBFE 0%, #F1F4FA 100%);
  --brand-footer: linear-gradient(180deg, #FAFBFE 0%, #E8E2FF 100%);
  --brand-panel: linear-gradient(135deg, #DBF7FF 0%, #E8E2FF 60%, #FFD3A8 100%);
  --brand-on-gradient: #062F2A;
  --brand-headline-1: #11151F;
  --brand-headline-2: #11151F;
  --brand-headline-accent: #0A3D52;
  --brand-overline: #9E2E45;
  --brand-selection: rgba(46, 255, 184, 0.4);
}

html[data-site-theme="mist"] {
  --gradient-aurora: linear-gradient(120deg, #9B8FFF 0%, #38BDF8 100%);
  --gradient-aurora-soft: linear-gradient(120deg, #EDE9FE 0%, #E0F2FE 100%);
  --shadow-glow-aurora: 0 12px 40px rgba(139, 92, 246, 0.28), 0 4px 14px rgba(56, 189, 248, 0.22);
  --bg-page: #FAF8FF;
  --bg-subtle: #F3F0FA;
  --brand-surface: linear-gradient(180deg, #FAF8FF 0%, #F3F0FA 100%);
  --brand-footer: linear-gradient(180deg, #FAF8FF 0%, #E8E2FF 100%);
  --brand-panel: linear-gradient(135deg, #EDE9FE 0%, #FFE9D6 50%, #DBF7FF 100%);
  --brand-on-gradient: #062F2A;
  --brand-headline-1: #11151F;
  --brand-headline-2: #11151F;
  --brand-headline-accent: #3D2E6B;
  --brand-overline: #6B4FA8;
  --brand-selection: rgba(167, 139, 250, 0.35);
}

html[data-site-theme="sun"] {
  --gradient-aurora: linear-gradient(120deg, #6B2FE6 0%, #B331E2 45%, #FF7A2E 100%);
  --gradient-aurora-soft: linear-gradient(120deg, rgba(107, 47, 230, 0.42) 0%, rgba(255, 122, 46, 0.36) 100%);
  --shadow-glow-aurora: 0 12px 40px rgba(255, 122, 46, 0.28), 0 4px 14px rgba(107, 47, 230, 0.38);
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-2: 0 4px 14px rgba(0, 0, 0, 0.42);
  --shadow-3: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-4: 0 24px 60px rgba(0, 0, 0, 0.55);
  --bg-page: #100E18;
  --bg-subtle: #181522;
  --bg-card: #1E1B2C;
  --base-0: #1E1B2C;
  --base-50: #100E18;
  --base-100: #262238;
  --base-200: #3A3452;
  --base-300: #524C6C;
  --base-400: #7A7394;
  --base-500: #A39CBC;
  --base-700: #E2DCF4;
  --base-900: #FAF8FF;
  --fg-1: #FAF8FF;
  --fg-2: #DDD6F0;
  --fg-3: #B8B0D4;
  --fg-4: #948CB8;
  --fg-on-glass: #FAF8FF;
  --glass-strong: rgba(30, 27, 44, 0.92);
  --glass-medium: rgba(30, 27, 44, 0.78);
  --glass-light: rgba(30, 27, 44, 0.52);
  --glass-border: rgba(255, 255, 255, 0.14);
  --glass-border-soft: rgba(255, 255, 255, 0.09);
  --surface-card: var(--bg-card);
  --surface-soft: #1A1728;
  --surface-nav: rgba(16, 14, 26, 0.9);
  --surface-menu: rgba(28, 25, 42, 0.98);
  --surface-field: #262238;
  --surface-chrome: #14111F;
  --border-subtle: rgba(255, 255, 255, 0.1);
  --border-field: rgba(255, 255, 255, 0.14);
  --success-soft: rgba(22, 198, 131, 0.2);
  --warning-soft: rgba(255, 179, 71, 0.22);
  --danger-soft: rgba(255, 77, 94, 0.2);
  --info-soft: rgba(0, 213, 255, 0.16);
  --brand-surface: linear-gradient(180deg, #100E18 0%, #181522 100%);
  --brand-footer: linear-gradient(180deg, #100E18 0%, #1A1228 100%);
  --brand-panel: linear-gradient(135deg, #1E1630 0%, #2A1820 55%, #1A1428 100%);
  --brand-on-gradient: #FFFFFF;
  --brand-headline-1: #FFF9F4;
  --brand-headline-2: #FFF9F4;
  --brand-headline-accent: #FFC894;
  --brand-overline: #FFB8A8;
  --brand-selection: rgba(255, 160, 90, 0.45);
}

/* Animated aurora — used behind hero. Reduced-motion safe. */
.bg-aurora-animated {
  background:
    radial-gradient(58% 75% at 18% 28%, rgba(46, 255, 184, 0.95) 0%, transparent 58%),
    radial-gradient(52% 68% at 82% 18%, rgba(0, 213, 255, 0.9) 0%, transparent 58%),
    radial-gradient(65% 85% at 55% 92%, rgba(0, 163, 209, 0.45) 0%, transparent 62%),
    linear-gradient(135deg, #8FFFE0 0%, #B5F0FF 42%, #7AD4FF 100%);
  background-size: 220% 220%;
  animation: auroraDrift 18s var(--ease-in-out) infinite;
}
@keyframes auroraDrift {
  0%, 100% { background-position: 0% 0%, 100% 0%, 50% 100%, 0% 0%; }
  50%      { background-position: 30% 20%, 60% 30%, 70% 70%, 100% 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .bg-aurora-animated,
  .bg-mist-animated,
  .bg-sun-animated { animation: none; }
}

/* Glacier mist — soft lavender / peach / sky (booking / alt hero) */
.bg-mist-animated {
  background:
    radial-gradient(62% 78% at 18% 28%, rgba(232, 226, 255, 0.92) 0%, transparent 58%),
    radial-gradient(58% 72% at 82% 22%, rgba(255, 233, 214, 0.88) 0%, transparent 58%),
    radial-gradient(72% 88% at 52% 92%, rgba(219, 247, 255, 0.9) 0%, transparent 62%),
    var(--gradient-mist);
  background-size: 220% 220%;
  animation: auroraDrift 22s var(--ease-in-out) infinite;
}

/* Midnight sun — dark base with violet / magenta / orange glow */
.bg-sun-animated {
  background:
    radial-gradient(58% 78% at 20% 30%, rgba(107, 47, 230, 0.55) 0%, transparent 58%),
    radial-gradient(55% 72% at 80% 22%, rgba(255, 122, 46, 0.45) 0%, transparent 58%),
    radial-gradient(68% 88% at 52% 90%, rgba(179, 49, 226, 0.38) 0%, transparent 62%),
    linear-gradient(135deg, #1A1228 0%, #120E1C 48%, #0E0C18 100%);
  background-size: 220% 220%;
  animation: auroraDrift 20s var(--ease-in-out) infinite;
}

/* =========================================================================
   Glass card primitive
   ========================================================================= */
.glass {
  background: var(--glass-strong);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-3), var(--ring-glass);
  color: var(--fg-on-glass);
}
.glass--medium { background: var(--glass-medium); box-shadow: var(--shadow-2), var(--ring-glass-soft); }
.glass--light  { background: var(--glass-light);  box-shadow: var(--shadow-2), var(--ring-glass-soft); color: #fff; }
.glass--tint   { background: var(--glass-tint);   box-shadow: var(--ring-glass-soft); color: #fff; }