/* ============================================================
   APEX ARBOR HOLDING LIMITED — DESIGN SYSTEM
   Agent 1: Design Tokens & Base Styles
   ============================================================ */

/* ─── Google Fonts ─── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Playfair+Display:wght@400;600;700&display=swap');

/* ─── CSS Custom Properties (Design Tokens) ─── */
:root {
  /* Brand Colors */
  --color-deep-space:    #0A1A3F;   /* Deep Space Blue — primary bg */
  --color-tech-blue:     #0066FF;   /* Tech Blue — CTA, accent */
  --color-future-silver: #E0E7FF;   /* Future Silver — light text */
  --color-vivid-cyan:    #00D4AA;   /* Vivid Cyan — highlight, tag */

  /* Neutrals */
  --color-white:         #FFFFFF;
  --color-off-white:     #F8FAFF;
  --color-gray-100:      #EEF1F8;
  --color-gray-200:      #D4DAE8;
  --color-gray-400:      #8A95B0;
  --color-gray-600:      #4A5470;
  --color-gray-800:      #1E2A4A;
  --color-black:         #050D1F;

  /* Gradients */
  --gradient-hero:       linear-gradient(135deg, #0A1A3F 0%, #0D2060 50%, #0A1A3F 100%);
  --gradient-section:    linear-gradient(180deg, #0A1A3F 0%, #0D2460 100%);
  --gradient-card:       linear-gradient(135deg, rgba(0,102,255,0.08) 0%, rgba(0,212,170,0.05) 100%);
  --gradient-cyan-glow:  linear-gradient(135deg, #00D4AA 0%, #0066FF 100%);
  --gradient-blue-glow:  linear-gradient(135deg, #0066FF 0%, #3399FF 100%);
  --gradient-overlay:    linear-gradient(180deg, transparent 0%, rgba(10,26,63,0.95) 100%);

  /* Typography */
  --font-primary:   'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display:   'Playfair Display', Georgia, serif;

  --fs-xs:    0.75rem;    /* 12px */
  --fs-sm:    0.875rem;   /* 14px */
  --fs-base:  1rem;       /* 16px */
  --fs-md:    1.125rem;   /* 18px */
  --fs-lg:    1.25rem;    /* 20px */
  --fs-xl:    1.5rem;     /* 24px */
  --fs-2xl:   1.875rem;   /* 30px */
  --fs-3xl:   2.25rem;    /* 36px */
  --fs-4xl:   3rem;       /* 48px */
  --fs-5xl:   3.75rem;    /* 60px */
  --fs-6xl:   4.5rem;     /* 72px */

  --fw-light:    300;
  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;
  --fw-extrabold:800;
  --fw-black:    900;

  --lh-tight:  1.2;
  --lh-snug:   1.35;
  --lh-normal: 1.6;
  --lh-loose:  1.8;

  /* Spacing */
  --sp-1:   0.25rem;
  --sp-2:   0.5rem;
  --sp-3:   0.75rem;
  --sp-4:   1rem;
  --sp-5:   1.25rem;
  --sp-6:   1.5rem;
  --sp-8:   2rem;
  --sp-10:  2.5rem;
  --sp-12:  3rem;
  --sp-16:  4rem;
  --sp-20:  5rem;
  --sp-24:  6rem;
  --sp-32:  8rem;

  /* Layout */
  --container-max:  1280px;
  --container-wide: 1440px;
  --container-sm:   768px;
  --nav-height:     80px;

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

  --border-subtle:  1px solid rgba(224, 231, 255, 0.1);
  --border-light:   1px solid rgba(224, 231, 255, 0.2);
  --border-medium:  1px solid rgba(224, 231, 255, 0.35);
  --border-cyan:    1px solid rgba(0, 212, 170, 0.3);
  --border-blue:    1px solid rgba(0, 102, 255, 0.3);

  /* Shadows */
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.3);
  --shadow-md:    0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg:    0 8px 32px rgba(0,0,0,0.5);
  --shadow-xl:    0 16px 64px rgba(0,0,0,0.6);
  --shadow-glow-blue: 0 0 30px rgba(0,102,255,0.25);
  --shadow-glow-cyan: 0 0 30px rgba(0,212,170,0.25);
  --shadow-card:  0 4px 24px rgba(0,0,0,0.3), 0 0 0 1px rgba(224,231,255,0.05);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-index */
  --z-base:    0;
  --z-raised:  10;
  --z-overlay: 100;
  --z-modal:   1000;
  --z-nav:     900;
  --z-toast:   1100;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  color: var(--color-future-silver);
  background-color: var(--color-deep-space);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ─── Typography Utilities ─── */
.text-display {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
}

.text-hero {
  font-size: clamp(var(--fs-3xl), 5vw, var(--fs-5xl));
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
}

.text-section-title {
  font-size: clamp(var(--fs-2xl), 3.5vw, var(--fs-4xl));
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  letter-spacing: -0.02em;
}

.text-card-title {
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
}

.text-body-lg {
  font-size: var(--fs-md);
  line-height: var(--lh-loose);
  color: rgba(224, 231, 255, 0.75);
}

.text-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ─── Color Utilities ─── */
.text-white    { color: var(--color-white); }
.text-silver   { color: var(--color-future-silver); }
.text-cyan     { color: var(--color-vivid-cyan); }
.text-blue     { color: var(--color-tech-blue); }
.text-muted    { color: var(--color-gray-400); }

/* Gradient Text */
.text-gradient-cyan {
  background: var(--gradient-cyan-glow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-blue {
  background: var(--gradient-blue-glow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── Layout Utilities ─── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.section-padding {
  padding: var(--sp-24) 0;
}

.section-padding-lg {
  padding: var(--sp-32) 0;
}

/* ─── Section Labels ─── */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-full);
  background: rgba(0, 212, 170, 0.1);
  border: var(--border-cyan);
  color: var(--color-vivid-cyan);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--sp-6);
}

.section-eyebrow::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-vivid-cyan);
}

/* ─── Dividers ─── */
.divider {
  width: 60px;
  height: 3px;
  background: var(--gradient-cyan-glow);
  border-radius: var(--radius-full);
  margin: var(--sp-6) 0;
}

.divider-center { margin: var(--sp-6) auto; }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-8);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-blue-glow);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(0,102,255,0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,102,255,0.5);
}

.btn-outline {
  background: transparent;
  color: var(--color-future-silver);
  border: var(--border-medium);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: rgba(224,231,255,0.08);
  border-color: rgba(224,231,255,0.5);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-cyan {
  background: var(--gradient-cyan-glow);
  color: var(--color-deep-space);
  font-weight: var(--fw-bold);
  box-shadow: 0 4px 20px rgba(0,212,170,0.35);
}

.btn-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,212,170,0.5);
}

.btn-lg {
  padding: var(--sp-4) var(--sp-10);
  font-size: var(--fs-base);
}

.btn-sm {
  padding: var(--sp-2) var(--sp-5);
  font-size: var(--fs-xs);
}

/* ── Ghost Gradient Button (for card CTAs / modal triggers) ── */
.btn-ghost {
  background: linear-gradient(135deg, rgba(0,212,170,0.15) 0%, rgba(0,102,255,0.12) 100%);
  color: var(--color-white);
  border: 1px solid rgba(0,212,170,0.35);
  border-radius: var(--radius-full);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  position: relative;
  overflow: hidden;
}

.btn-ghost::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,212,170,0.25) 0%, rgba(0,102,255,0.2) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  border-radius: inherit;
}

.btn-ghost:hover {
  color: var(--color-white);
  border-color: rgba(0,212,170,0.6);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,212,170,0.3), 0 2px 12px rgba(0,102,255,0.2);
}

.btn-ghost:hover::before {
  opacity: 1;
}

.btn-ghost i,
.btn-ghost span {
  position: relative;
  z-index: 1;
}

/* ─── Cards ─── */
.card {
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(0,102,255,0.05), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(0,102,255,0.3);
}

.card:hover::before { opacity: 1; }

/* ─── Tags / Badges ─── */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.06em;
}

.tag-cyan {
  background: rgba(0,212,170,0.12);
  color: var(--color-vivid-cyan);
  border: 1px solid rgba(0,212,170,0.2);
}

.tag-blue {
  background: rgba(0,102,255,0.12);
  color: #66AAFF;
  border: 1px solid rgba(0,102,255,0.2);
}

/* ─── Number / Stat Display ─── */
.stat-number {
  font-size: clamp(var(--fs-2xl), 3.5vw, var(--fs-4xl));
  font-weight: var(--fw-black);
  font-family: var(--font-primary);
  line-height: 1;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.stat-label {
  font-size: var(--fs-sm);
  color: var(--color-gray-400);
  margin-top: var(--sp-1);
  font-weight: var(--fw-medium);
}

/* ─── Line Decorations ─── */
.line-accent {
  position: relative;
  display: inline-block;
}

.line-accent::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-cyan-glow);
  border-radius: var(--radius-full);
}

/* ─── Scroll Animation (AOS-like via class) ─── */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal][data-delay="1"] { transition-delay: 0.1s; }
[data-reveal][data-delay="2"] { transition-delay: 0.2s; }
[data-reveal][data-delay="3"] { transition-delay: 0.3s; }
[data-reveal][data-delay="4"] { transition-delay: 0.4s; }
[data-reveal][data-delay="5"] { transition-delay: 0.5s; }

/* ─── Noise Texture Overlay ─── */
.noise-overlay {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.4;
  z-index: 1;
}

/* ─── Background Orbs / Glows ─── */
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.bg-orb-blue  { background: rgba(0,102,255,0.15); }
.bg-orb-cyan  { background: rgba(0,212,170,0.1); }
.bg-orb-deep  { background: rgba(10,26,63,0.8); }

/* ─── Grid Lines (decorative) ─── */
.grid-bg {
  background-image:
    linear-gradient(rgba(224,231,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(224,231,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ─── Responsive Breakpoints ─── */
@media (max-width: 1024px) {
  :root {
    --nav-height: 72px;
  }
  .section-padding { padding: var(--sp-20) 0; }
  .section-padding-lg { padding: var(--sp-24) 0; }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }
  .container, .container-wide { padding: 0 var(--sp-4); }
  .section-padding { padding: var(--sp-16) 0; }
  .section-padding-lg { padding: var(--sp-20) 0; }
  .card { padding: var(--sp-6); }
}

@media (max-width: 480px) {
  .btn-lg {
    padding: var(--sp-3) var(--sp-8);
    font-size: var(--fs-sm);
  }
}