/* ============================================================
   ESC WEBSITE — DESIGN SYSTEM (Antigravity-Inspired, Red Theme)
   ============================================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
  --color-primary: #B72025;
  --color-primary-dark: #8B1A1E;
  --color-primary-light: #E8393F;
  --color-primary-glow: rgba(183, 32, 37, 0.15);
  --color-bg: #FFFFFF;
  --color-surface: #F8F9FA;
  --color-card: #F1F3F4;
  --color-card-hover: #E8EAED;
  --color-text: #1A1A1A;
  --color-text-secondary: #3C4043;
  --color-text-muted: #6B7280;
  --color-border: #E5E7EB;
  --color-footer-bg: #1A1A1A;
  --color-footer-text: #E5E7EB;
  --color-footer-muted: #9CA3AF;
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 100px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-header: 0 1px 8px rgba(0,0,0,0.08);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  --container-max: 1200px;
  --container-wide: 1400px;
  --header-height: 72px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }
.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary); }
.overline {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}

/* --- Layout --- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.container-wide { max-width: var(--container-wide); margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-alt { background: var(--color-surface); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.text-center { text-align: center; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(183, 32, 37, 0.3);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  box-shadow: 0 4px 16px rgba(183, 32, 37, 0.4);
  transform: translateY(-2px);
}
.btn-secondary {
  background: var(--color-card);
  color: var(--color-text);
}
.btn-secondary:hover {
  background: var(--color-card-hover);
  transform: translateY(-2px);
}
.btn-outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-white {
  background: #fff;
  color: var(--color-primary);
}
.btn-white:hover {
  background: #f0f0f0;
  color: var(--color-primary-dark);
  transform: translateY(-2px);
}
.btn-icon {
  width: 48px; height: 48px; padding: 0;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
}
.btn .arrow { transition: transform var(--transition-fast); }
.btn:hover .arrow { transform: translateX(4px); }

/* --- Header (Glassmorphism Sticky) --- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: box-shadow var(--transition-fast), background var(--transition-fast);
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-header);
}
.header-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-logo img { height: 36px; width: auto; }
.header-nav { display: flex; align-items: center; gap: 8px; }
.header-nav a, .nav-dropdown-trigger {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  font-family: inherit;
}
.header-nav a:hover, .nav-dropdown-trigger:hover,
.header-nav a.active, .nav-dropdown-trigger.active {
  background: var(--color-card);
  color: var(--color-text);
}
.header-actions { display: flex; align-items: center; gap: 12px; }

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border);
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown-menu a {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}
.nav-dropdown-menu a:hover {
  background: var(--color-surface);
  color: var(--color-primary);
}

/* Mobile Nav */
.mobile-toggle {
  display: none;
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  align-items: center; justify-content: center;
  background: none; border: none; cursor: pointer;
}
.mobile-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--color-text);
  transition: all var(--transition-fast);
  position: relative;
}
.mobile-toggle span::before, .mobile-toggle span::after {
  content: ''; position: absolute; left: 0;
  width: 100%; height: 2px;
  background: var(--color-text);
  transition: all var(--transition-fast);
}
.mobile-toggle span::before { top: -7px; }
.mobile-toggle span::after { top: 7px; }
.mobile-toggle.active span { background: transparent; }
.mobile-toggle.active span::before { top: 0; transform: rotate(45deg); }
.mobile-toggle.active span::after { top: 0; transform: rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height); left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  padding: 24px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-smooth);
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav a {
  display: block; padding: 16px 0;
  font-size: 1.1rem; font-weight: 500;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav a:hover { color: var(--color-primary); }
.mobile-nav .mobile-dropdown-items { padding-left: 16px; }
.mobile-nav .mobile-dropdown-items a { font-size: 1rem; font-weight: 400; }

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--header-height) + 40px) 24px 80px;
  position: relative;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse at 30% 20%, var(--color-primary-glow) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(183,32,37,0.08) 0%, transparent 50%),
              var(--color-bg);
}
.hero-content { position: relative; z-index: 1; max-width: 900px; }
.hero h1 { margin-bottom: 24px; }
.hero h1 .highlight { color: var(--color-primary); }
.hero .subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  background: var(--color-primary-glow);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 24px;
}

/* Floating gradient orbs for hero */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  z-index: 0;
  animation: float 20s ease-in-out infinite;
}
.hero-orb-1 {
  width: 400px; height: 400px;
  background: var(--color-primary);
  top: -100px; right: -100px;
  opacity: 0.08;
}
.hero-orb-2 {
  width: 300px; height: 300px;
  background: var(--color-primary-light);
  bottom: -50px; left: -50px;
  opacity: 0.06;
  animation-delay: -10s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* --- Page Hero (Inner pages) --- */
.page-hero {
  padding: calc(var(--header-height) + 80px) 24px 60px;
  text-align: center;
  background: var(--color-surface);
  position: relative;
  overflow: hidden;
}
.page-hero .overline { margin-bottom: 16px; display: block; }
.page-hero h1 { margin-bottom: 16px; font-size: clamp(2rem, 5vw, 3.5rem); }
.page-hero p { max-width: 640px; margin: 0 auto; color: var(--color-text-muted); font-size: 1.1rem; }

/* --- Cards --- */
.card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.card-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-primary-glow);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  color: var(--color-primary);
  font-size: 1.5rem;
}
.card h3 { margin-bottom: 12px; }
.card p { color: var(--color-text-muted); font-size: 0.95rem; line-height: 1.7; }
.card-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 16px;
  font-weight: 600; font-size: 0.9rem;
  color: var(--color-primary);
}
.card-link:hover .arrow { transform: translateX(4px); }
.card-link .arrow { transition: transform var(--transition-fast); }

/* Large Feature Card */
.feature-card {
  background: var(--color-card);
  border-radius: var(--radius-xl);
  padding: 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.feature-card.reverse { direction: rtl; }
.feature-card.reverse > * { direction: ltr; }
.feature-card-content .overline { margin-bottom: 12px; display: block; }
.feature-card-content h2 { margin-bottom: 16px; }
.feature-card-content p { margin-bottom: 24px; }
.feature-card-visual {
  background: linear-gradient(135deg, var(--color-primary-glow), rgba(183,32,37,0.05));
  border-radius: var(--radius-lg);
  aspect-ratio: 4/3;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.feature-card-visual img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-lg); }

/* Stats */
.stat-card { text-align: center; padding: 40px 24px; }
.stat-number {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label { color: var(--color-text-muted); font-size: 0.95rem; }

/* --- Service Detail Layout --- */
.service-intro { max-width: 720px; margin: 0 auto 60px; text-align: center; }
.service-intro h2 { margin-bottom: 16px; }
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }

/* --- CTA Banner --- */
.cta-banner {
  background: var(--color-primary);
  border-radius: var(--radius-xl);
  padding: 80px 60px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.1) 0%, transparent 60%);
}
.cta-banner h2 { color: #fff; margin-bottom: 16px; position: relative; }
.cta-banner p { color: rgba(255,255,255,0.8); margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; position: relative; }
.cta-banner .btn { position: relative; }

/* --- Footer (3-Tier Antigravity Style) --- */
.site-footer { background: var(--color-footer-bg); color: var(--color-footer-text); }

/* Tier 1: Link columns */
.footer-links {
  padding: 80px 0 60px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  padding: 4px 0;
  color: var(--color-footer-muted);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}
.footer-col a:hover { color: #fff; }

/* Tier 2: Giant wordmark */
.footer-wordmark {
  padding: 40px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  overflow: hidden;
}
.footer-wordmark-text {
  font-size: clamp(4rem, 12vw, 10rem);
  font-weight: 700;
  color: rgba(255,255,255,0.04);
  letter-spacing: -0.03em;
  line-height: 1;
  user-select: none;
}

/* Tier 3: Bottom bar */
.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-bottom-logo img { height: 28px; width: auto; filter: brightness(0) invert(1); }
.footer-bottom-legal { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-bottom-legal a { color: var(--color-footer-muted); font-size: 0.8rem; }
.footer-bottom-legal a:hover { color: #fff; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-footer-muted);
  transition: all var(--transition-fast);
}
.footer-social a:hover { background: var(--color-primary); color: #fff; }

/* --- Forms --- */
.form-group { margin-bottom: 24px; }
.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  background: #fff;
  color: var(--color-text);
  transition: border-color var(--transition-fast);
  outline: none;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-glow);
}
.form-textarea { min-height: 140px; resize: vertical; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature-card { grid-template-columns: 1fr; padding: 40px; }
  .feature-card.reverse { direction: ltr; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .header-nav { display: none; }
  .header-actions .btn { display: none; }
  .mobile-toggle { display: flex; }
  .mobile-nav { display: block; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .hero { min-height: auto; padding-top: calc(var(--header-height) + 60px); padding-bottom: 60px; }
  .cta-banner { padding: 48px 24px; }
  .footer-links { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .form-grid { grid-template-columns: 1fr; }
  .card { padding: 28px; }
}

@media (max-width: 480px) {
  .footer-links { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: center; }
  .hero-cta .btn { width: 100%; justify-content: center; }
}