/* ═══════════════════════════════════════════════════════════════
   HKEX Fund Design System
   Brand: HKEX RISE — hkex.fund
   "Hong Kong IPO intelligence, delivered with institutional clarity."
   ═══════════════════════════════════════════════════════════════ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Inter:ital,opsz,wght@0,14..32,300..800;1,14..32,300..800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── CSS Custom Properties (Design Tokens) ───────────────── */
:root {
  /* Core Brand Palette */
  --harbour-navy:    #020A12;
  --exchange-blue:   #123C69;
  --beacon-gold:     #E0B84F;
  --pearl:           #F7F4EC;
  --rise-orange:     #F05A28;
  --white:           #FFFFFF;

  /* Supporting Neutrals */
  --ink-black:       #050505;
  --charcoal:        #1E2228;
  --slate:           #3A424D;
  --mist-grey:       #D9D8D2;
  --soft-pearl:      #FBF9F3;
  --warm-stone:      #E8E3D8;

  /* Semantic Tokens — Dark Mode (default) */
  --bg-primary:      var(--harbour-navy);
  --bg-secondary:    var(--charcoal);
  --bg-tertiary:     #0D1520;
  --bg-card:         rgba(30, 34, 40, 0.65);
  --bg-card-hover:   rgba(30, 34, 40, 0.85);
  --bg-elevated:     rgba(18, 60, 105, 0.12);
  --bg-glass:        rgba(2, 10, 18, 0.72);
  --bg-input:        rgba(58, 66, 77, 0.35);

  --text-primary:    #F0EDE6;
  --text-secondary:  #A8A49C;
  --text-tertiary:   #6B6760;
  --text-inverse:    var(--ink-black);
  --text-link:       var(--rise-orange);
  --text-heading:    var(--white);

  --border-subtle:   rgba(217, 216, 210, 0.08);
  --border-default:  rgba(217, 216, 210, 0.14);
  --border-strong:   rgba(217, 216, 210, 0.25);
  --border-accent:   var(--rise-orange);

  --shadow-sm:       0 1px 2px rgba(0,0,0,0.25);
  --shadow-md:       0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg:       0 12px 40px rgba(0,0,0,0.4);
  --shadow-glow:     0 0 30px rgba(240, 90, 40, 0.08);

  /* Sentiment Colors */
  --bullish:         #22C55E;
  --bullish-bg:      rgba(34, 197, 94, 0.1);
  --bearish:         #EF4444;
  --bearish-bg:      rgba(239, 68, 68, 0.1);
  --neutral-sent:    var(--beacon-gold);
  --neutral-sent-bg: rgba(224, 184, 79, 0.1);

  /* Typography */
  --font-serif:      'DM Serif Display', Georgia, 'Times New Roman', serif;
  --font-sans:       'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono:       'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Type Scale (Major Third — 1.25 ratio) */
  --text-xs:    0.694rem;   /* 11.1px */
  --text-sm:    0.833rem;   /* 13.3px */
  --text-base:  1rem;       /* 16px */
  --text-md:    1.125rem;   /* 18px */
  --text-lg:    1.25rem;    /* 20px */
  --text-xl:    1.563rem;   /* 25px */
  --text-2xl:   1.953rem;   /* 31.3px */
  --text-3xl:   2.441rem;   /* 39px */
  --text-4xl:   3.052rem;   /* 48.8px */
  --text-5xl:   3.815rem;   /* 61px */
  --text-6xl:   4.768rem;   /* 76.3px */

  --leading-tight:   1.2;
  --leading-snug:    1.35;
  --leading-normal:  1.6;
  --leading-relaxed: 1.75;

  --tracking-tight:  -0.025em;
  --tracking-normal: 0;
  --tracking-wide:   0.025em;
  --tracking-wider:  0.05em;
  --tracking-widest: 0.1em;

  /* Spacing (4px base) */
  --space-0:   0;
  --space-1:   0.25rem;   /* 4px */
  --space-2:   0.5rem;    /* 8px */
  --space-3:   0.75rem;   /* 12px */
  --space-4:   1rem;      /* 16px */
  --space-5:   1.25rem;   /* 20px */
  --space-6:   1.5rem;    /* 24px */
  --space-8:   2rem;      /* 32px */
  --space-10:  2.5rem;    /* 40px */
  --space-12:  3rem;      /* 48px */
  --space-16:  4rem;      /* 64px */
  --space-20:  5rem;      /* 80px */
  --space-24:  6rem;      /* 96px */
  --space-32:  8rem;      /* 128px */

  /* Layout */
  --max-width:    1280px;
  --max-content:  720px;
  --sidebar-w:    340px;
  --nav-height:   72px;
  --grid-gap:     var(--space-6);

  /* Border Radius */
  --radius-sm:    4px;
  --radius-md:    8px;
  --radius-lg:    12px;
  --radius-xl:    16px;
  --radius-2xl:   24px;
  --radius-full:  9999px;

  /* Transitions */
  --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:  cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring:  cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast:    150ms;
  --duration-normal:  250ms;
  --duration-slow:    400ms;
  --duration-slower:  600ms;

  /* Z-Index Scale */
  --z-base:      1;
  --z-elevated:  10;
  --z-sticky:    100;
  --z-overlay:   200;
  --z-modal:     300;
  --z-toast:     400;
  --z-max:       9999;
}

/* ── Light Mode ──────────────────────────────────────────── */
[data-theme="light"] {
  --bg-primary:      var(--pearl);
  --bg-secondary:    var(--soft-pearl);
  --bg-tertiary:     var(--warm-stone);
  --bg-card:         rgba(255, 255, 255, 0.85);
  --bg-card-hover:   rgba(255, 255, 255, 1);
  --bg-elevated:     rgba(18, 60, 105, 0.05);
  --bg-glass:        rgba(247, 244, 236, 0.85);
  --bg-input:        rgba(232, 227, 216, 0.5);

  --text-primary:    var(--ink-black);
  --text-secondary:  var(--slate);
  --text-tertiary:   #8A857D;
  --text-inverse:    var(--white);
  --text-heading:    var(--harbour-navy);

  --border-subtle:   rgba(5, 5, 5, 0.05);
  --border-default:  rgba(5, 5, 5, 0.1);
  --border-strong:   rgba(5, 5, 5, 0.2);

  --shadow-sm:       0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:       0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:       0 12px 40px rgba(0,0,0,0.12);
  --shadow-glow:     0 0 30px rgba(240, 90, 40, 0.06);
}

/* ── Reset & Base ────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  hanging-punctuation: first last;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--duration-slow) var(--ease-out),
              color var(--duration-slow) var(--ease-out);
}

/* ── Typography ──────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--text-heading);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: 400;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-md); }

p {
  max-width: 65ch;
  margin-bottom: var(--space-4);
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--beacon-gold);
}

strong { font-weight: 600; }

small {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 2px 6px;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
}

::selection {
  background: var(--rise-orange);
  color: var(--white);
}

/* ── Utility Classes ─────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--narrow {
  max-width: var(--max-content);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.text-center { text-align: center; }
.text-right  { text-align: right; }

.text-xs   { font-size: var(--text-xs); }
.text-sm   { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-md   { font-size: var(--text-md); }
.text-lg   { font-size: var(--text-lg); }

.text-muted { color: var(--text-secondary); }
.text-faint { color: var(--text-tertiary); }

.font-sans  { font-family: var(--font-sans); }
.font-serif { font-family: var(--font-serif); }
.font-mono  { font-family: var(--font-mono); }

.uppercase {
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  font-size: var(--text-xs);
  font-weight: 600;
}

.flex       { display: flex; }
.flex-col   { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1  { gap: var(--space-1); }
.gap-2  { gap: var(--space-2); }
.gap-3  { gap: var(--space-3); }
.gap-4  { gap: var(--space-4); }
.gap-6  { gap: var(--space-6); }
.gap-8  { gap: var(--space-8); }

/* ── Grid System ─────────────────────────────────────────── */
.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.grid-sidebar {
  grid-template-columns: 1fr var(--sidebar-w);
}

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--slate);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* ── Keyframe Animations ─────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-32px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(32px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes borderGlow {
  0%, 100% { border-color: var(--rise-orange); box-shadow: var(--shadow-glow); }
  50%      { border-color: var(--beacon-gold); box-shadow: 0 0 30px rgba(224, 184, 79, 0.1); }
}

/* ── Animation Utilities ─────────────────────────────────── */
.animate-fade-in     { animation: fadeIn var(--duration-slow) var(--ease-out) both; }
.animate-fade-in-up  { animation: fadeInUp var(--duration-slower) var(--ease-out) both; }
.animate-fade-in-down { animation: fadeInDown var(--duration-slow) var(--ease-out) both; }
.animate-slide-left  { animation: slideInLeft var(--duration-slower) var(--ease-out) both; }
.animate-slide-right { animation: slideInRight var(--duration-slower) var(--ease-out) both; }
.animate-scale-in    { animation: scaleIn var(--duration-slow) var(--ease-spring) both; }

/* Stagger delays */
.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }
.delay-3 { animation-delay: 300ms; }
.delay-4 { animation-delay: 400ms; }
.delay-5 { animation-delay: 500ms; }
.delay-6 { animation-delay: 600ms; }

/* Scroll-triggered (initially hidden) */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive Breakpoints ──────────────────────────────── */
@media (max-width: 1024px) {
  .grid-sidebar {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  html { font-size: 15px; }

  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }

  .container {
    padding: 0 var(--space-4);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hide-mobile { display: none !important; }
}

@media (max-width: 480px) {
  html { font-size: 14px; }
  .container { padding: 0 var(--space-3); }
}

/* ── Focus Styles (Accessibility) ────────────────────────── */
:focus-visible {
  outline: 2px solid var(--rise-orange);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Print Styles ────────────────────────────────────────── */
@media print {
  body {
    background: white;
    color: black;
  }
  .nav, .footer, .newsletter-cta, .ticker {
    display: none;
  }
}