/* ========== MCT Website - Main Stylesheet ========== */

/* ===== Font Faces ===== */
@font-face {
  font-family: 'Outfit';
  src: url('../_shared/fonts/Outfit-Regular.ttf') format('truetype');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'Outfit';
  src: url('../_shared/fonts/Outfit-Bold.ttf') format('truetype');
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: 'GeistMono';
  src: url('../_shared/fonts/GeistMono-Regular.ttf') format('truetype');
  font-weight: 400;
  font-display: swap;
}

/* ===== CSS Variables - Dark (Default) ===== */
:root {
  --bg: rgba(10, 10, 18, 0.75);
  --bg-solid: #0a0a12;
  --bg2: rgba(18, 18, 31, 0.7);
  --bg2-solid: #12121f;
  --bg3: rgba(26, 26, 46, 0.65);
  --bg3-solid: #1a1a2e;
  --bg-glass: rgba(18, 18, 31, 0.55);
  --ink: #f0f0f5;
  --ink-dim: #c0c0d0;
  --muted: #a0a0b8;
  --rule: rgba(42, 42, 74, 0.5);
  --rule-light: rgba(58, 58, 90, 0.6);
  --accent: #00d4aa;
  --accent2: #7c3aed;
  --accent3: #0ea5e9;
  --accent-glow: rgba(0, 212, 170, 0.15);
  --accent-glow-strong: rgba(0, 212, 170, 0.3);
  --danger: #ef4444;
  --warning: #f59e0b;
  --font: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'GeistMono', 'JetBrains Mono', 'Fira Code', monospace;
  --max: 1200px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.4);
  --shadow-glow: 0 4px 20px rgba(0, 212, 170, 0.2);
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --glass-blur: blur(20px) saturate(1.3);
  --glass-border: 1px solid rgba(255,255,255,0.08);
}

/* ===== Light Theme ===== */
[data-theme="light"] {
  --bg: rgba(245, 245, 250, 0.75);
  --bg-solid: #f5f5fa;
  --bg2: rgba(255, 255, 255, 0.7);
  --bg2-solid: #ffffff;
  --bg3: rgba(235, 235, 245, 0.65);
  --bg3-solid: #ebebf5;
  --bg-glass: rgba(255, 255, 255, 0.55);
  --ink: #1a1a2e;
  --ink-dim: #2a2a4a;
  --muted: #6a6a8a;
  --rule: rgba(180, 180, 200, 0.4);
  --rule-light: rgba(160, 160, 190, 0.5);
  --accent: #00b894;
  --accent2: #6c5ce7;
  --accent3: #0984e3;
  --accent-glow: rgba(0, 184, 148, 0.12);
  --accent-glow-strong: rgba(0, 184, 148, 0.25);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.1);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
  --shadow-glow: 0 4px 20px rgba(0, 184, 148, 0.15);
  --glass-border: 1px solid rgba(0,0,0,0.06);
}

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

html { 
  font-size: 16px; 
  scroll-behavior: smooth; 
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg-solid);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  transition: color var(--transition-normal), background-color var(--transition-normal);
}

/* Global Background Image - full visible with glass overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: var(--bg-image, url('../assets/background.jpg')) center center / cover no-repeat;
  z-index: -2;
}

/* Global overlay - glassmorphism tint only, let background show through */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: var(--bg-solid);
  z-index: -1;
  opacity: 0.25;
  transition: background-color var(--transition-normal), opacity var(--transition-normal);
}

[data-theme="light"] body::after {
  opacity: 0.18;
}

::selection {
  background: var(--accent-glow-strong);
  color: var(--accent);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-solid); }
::-webkit-scrollbar-thumb { 
  background: var(--rule-light); 
  border-radius: 4px; 
}
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover { 
  color: var(--accent3); 
}

code {
  font-family: var(--font-mono);
  background: var(--bg3);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  color: var(--accent);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  font-family: var(--font);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #00b894);
  color: #fff !important;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 170, 0.4);
  filter: brightness(1.1);
}

.btn-secondary {
  background: var(--bg2);
  color: var(--ink);
  border: var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  color: var(--ink);
  background: rgba(255,255,255,0.05);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.9rem;
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

/* ===== Navigation - Glassmorphism ===== */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
  transition: all var(--transition-normal);
}

nav.scrolled {
  background: var(--bg);
  box-shadow: var(--shadow-md);
}

nav .nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

nav .logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
  text-decoration: none;
  transition: transform var(--transition-fast);
}

nav .logo:hover { 
  transform: scale(1.02); 
}

nav .logo-icon {
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: none;
  border-radius: 0;
  box-shadow: none;
}

nav .logo-icon img {
  width: 1.25rem;
  height: 1.25rem;
  object-fit: contain;
}

nav .nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

nav .nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.25rem 0;
}

nav .nav-links a:hover, 
nav .nav-links a.active { 
  color: var(--accent); 
}

nav .nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 50%;
  width: 0; height: 2px;
  background: var(--accent);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
  border-radius: 1px;
}

nav .nav-links a:hover::after,
nav .nav-links a.active::after { 
  width: 100%; 
}

nav .nav-cta {
  background: linear-gradient(135deg, var(--accent), #00b894);
  color: #fff !important;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}

nav .nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

nav .nav-cta::after { 
  display: none !important; 
}

nav .nav-cta .github-icon {
  display: block;
}

/* Theme Toggle Button */
.theme-toggle {
  background: var(--bg2);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--muted);
  font-size: 1.2rem;
  transition: all var(--transition-fast);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--ink);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.mobile-menu-btn:hover {
  background: rgba(255,255,255,0.05);
}

/* ===== Section Common ===== */
section {
  padding: 6rem 2rem;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 4rem;
}

.section-header .tag {
  display: inline-block;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  position: relative;
}

.section-header .tag::before,
.section-header .tag::after {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
  vertical-align: middle;
  margin: 0 0.75rem;
  opacity: 0.5;
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--muted);
  font-size: 1.1rem;
}

/* ===== Footer ===== */
footer {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-top: var(--glass-border);
  padding: 4rem 2rem 2rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--ink);
}

.footer-brand .logo-icon {
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: none;
  border-radius: 0;
}

.footer-brand .logo-icon img {
  width: 1.25rem;
  height: 1.25rem;
  object-fit: contain;
}

.footer-brand p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer-col h5 {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
  color: var(--ink);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.75rem;
}

.footer-col a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.footer-col a:hover { 
  color: var(--accent); 
}

.footer-bottom {
  border-top: var(--glass-border);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-bottom .links {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-bottom a:hover { 
  color: var(--accent); 
}

/* ===== Page Hero (sub-pages) ===== */
.page-hero {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.page-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

.page-hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--ink) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-hero p {
  color: var(--muted);
  font-size: 1.2rem;
  line-height: 1.8;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumb a {
  color: var(--muted);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb .sep {
  opacity: 0.5;
}

.breadcrumb .current {
  color: var(--ink);
}

/* ===== Card Components ===== */
.card {
  background: var(--bg2);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-normal);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.card:hover {
  border-color: rgba(0, 212, 170, 0.3);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-icon {
  width: 56px; height: 56px;
  background: var(--accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(0, 212, 170, 0.2);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .footer-top { 
    grid-template-columns: 1fr 1fr; 
  }
  .page-hero h1 { 
    font-size: 2.5rem; 
  }
}

@media (max-width: 768px) {
  nav .nav-links { 
    display: none; 
    position: absolute;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    background: var(--bg-glass);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 1rem 2rem;
    border-bottom: var(--glass-border);
    gap: 0;
  }
  
  nav .nav-links.active {
    display: flex;
  }
  
  nav .nav-links li {
    width: 100%;
  }
  
  nav .nav-links a {
    display: block;
    padding: 0.75rem 0;
    border-bottom: var(--glass-border);
  }
  
  nav .nav-links a::after { 
    display: none; 
  }
  
  .mobile-menu-btn { 
    display: block; 
  }
  
  .section-header h2 { 
    font-size: 2rem; 
  }
  
  .page-hero h1 { 
    font-size: 2rem; 
  }
  
  .page-hero { 
    min-height: 40vh; 
    padding-top: 6rem; 
  }
  
  .footer-top { 
    grid-template-columns: 1fr; 
    gap: 2rem; 
  }
  
  .footer-bottom { 
    flex-direction: column; 
    text-align: center; 
  }
  
  section { 
    padding: 4rem 1.5rem; 
  }
}