/* ==========================================================================
   AKASH GHOSH — Portfolio Design System
   A futuristic, clean, formal design with light/dark mode
   ========================================================================== */

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

/* ==========================================================================
   CSS CUSTOM PROPERTIES — LIGHT MODE (default)
   ========================================================================== */
:root {
  /* Backgrounds */
  --bg-primary: #F8FAFC;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F1F5F9;
  --bg-elevated: #FFFFFF;
  --bg-hero-gradient: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 50%, #F0F9FF 100%);
  --bg-dot-pattern: radial-gradient(circle, #CBD5E1 1px, transparent 1px);

  /* Text */
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --text-inverse: #FFFFFF;

  /* Accent */
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-light: #3B82F6;
  --accent-subtle: rgba(37, 99, 235, 0.08);
  --accent-subtle-hover: rgba(37, 99, 235, 0.14);
  --accent-secondary: #06B6D4;
  --accent-gradient: linear-gradient(135deg, #2563EB, #06B6D4);
  --accent-gradient-text: linear-gradient(135deg, #1E40AF, #0891B2);
  --accent-glow: 0 0 30px rgba(37, 99, 235, 0.15);

  /* Borders & Shadows */
  --border: #E2E8F0;
  --border-hover: #CBD5E1;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 40px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 20px 60px rgba(15, 23, 42, 0.1);
  --shadow-accent: 0 4px 20px rgba(37, 99, 235, 0.15);

  /* Nav */
  --nav-bg: rgba(255, 255, 255, 0.82);
  --nav-border: rgba(226, 232, 240, 0.6);

  /* Misc */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Timeline */
  --timeline-line: #E2E8F0;
  --timeline-dot: #2563EB;
  --timeline-dot-glow: rgba(37, 99, 235, 0.3);

  /* Tags */
  --tag-bg: #EFF6FF;
  --tag-text: #1E40AF;
  --tag-border: #BFDBFE;

  /* Stat Cards */
  --stat-bg: #FFFFFF;
  --stat-border: #E2E8F0;

  /* Terminal */
  --terminal-bg: #1A1B26;
  --terminal-text: #C0CAF5;
  --terminal-prompt: #A9B1D6;
  --terminal-accent: #BB9AF7;
  --terminal-green: #9ECE6A;
  --terminal-cyan: #7DCFFF;
  --terminal-red: #F7768E;
  --terminal-yellow: #E0AF68;
}

/* ==========================================================================
   CSS CUSTOM PROPERTIES — DARK MODE
   ========================================================================== */
[data-theme="dark"] {
  --bg-primary: #0B0F1A;
  --bg-secondary: #111827;
  --bg-tertiary: #1E293B;
  --bg-elevated: #162032;
  --bg-hero-gradient: linear-gradient(135deg, #0B0F1A 0%, #0F1729 50%, #0B1120 100%);
  --bg-dot-pattern: radial-gradient(circle, #1E293B 1px, transparent 1px);

  --text-primary: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-muted: #64748B;
  --text-inverse: #0F172A;

  --accent: #3B82F6;
  --accent-hover: #60A5FA;
  --accent-light: #60A5FA;
  --accent-subtle: rgba(59, 130, 246, 0.1);
  --accent-subtle-hover: rgba(59, 130, 246, 0.18);
  --accent-secondary: #22D3EE;
  --accent-gradient: linear-gradient(135deg, #3B82F6, #22D3EE);
  --accent-gradient-text: linear-gradient(135deg, #60A5FA, #22D3EE);
  --accent-glow: 0 0 40px rgba(59, 130, 246, 0.2);

  --border: #1E293B;
  --border-hover: #334155;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.35);
  --shadow-accent: 0 4px 20px rgba(59, 130, 246, 0.2);

  --nav-bg: rgba(11, 15, 26, 0.85);
  --nav-border: rgba(30, 41, 59, 0.6);

  --timeline-line: #1E293B;
  --timeline-dot: #3B82F6;
  --timeline-dot-glow: rgba(59, 130, 246, 0.4);

  --tag-bg: rgba(59, 130, 246, 0.12);
  --tag-text: #93C5FD;
  --tag-border: rgba(59, 130, 246, 0.2);

  --stat-bg: #162032;
  --stat-border: #1E293B;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

::selection {
  background: var(--accent);
  color: #FFFFFF;
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-primary);
  transition: color var(--transition-base);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.mono {
  font-family: 'JetBrains Mono', monospace;
}

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

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.7;
}

/* ==========================================================================
   LAYOUT
   ========================================================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header .section-subtitle {
  margin: 0 auto;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* Dot Pattern Background */
.dot-bg {
  position: relative;
}

.dot-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: var(--bg-dot-pattern);
  background-size: 24px 24px;
  opacity: 0.5;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 75%);
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--nav-border);
  transition: all var(--transition-base);
  padding: 0 1.5rem;
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.navbar-logo span {
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.navbar-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition-fast);
  letter-spacing: 0.3px;
}

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px;
  transition: width var(--transition-base);
}

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

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

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme Toggle */
.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

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

.theme-toggle .icon-sun,
[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

.theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

/* Mobile Menu Toggle */
.mobile-menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Mobile Nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  animation: slideDown var(--transition-base) ease-out;
}

.mobile-nav.active {
  display: block;
}

.mobile-nav a {
  display: block;
  padding: 0.85rem 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.mobile-nav a:hover {
  background: var(--accent-subtle);
  color: var(--accent);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: none;
  letter-spacing: 0.2px;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #FFFFFF;
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.3);
  color: #FFFFFF;
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

.btn-ghost {
  background: transparent;
  color: var(--accent);
  padding: 0.5rem 1rem;
}

.btn-ghost:hover {
  background: var(--accent-subtle);
}

.btn-sm {
  padding: 0.5rem 1.1rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.9rem 2rem;
  font-size: 0.95rem;
}

/* ==========================================================================
   CARDS
   ========================================================================== */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-glass {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.card-accent-border::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover .card-accent-border::before,
.card-accent-border:hover::before {
  opacity: 1;
}

/* ==========================================================================
   TAGS / CHIPS
   ========================================================================== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--tag-border);
  transition: all var(--transition-fast);
  letter-spacing: 0.2px;
}

.tag:hover {
  background: var(--accent-subtle-hover);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg-hero-gradient);
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 600px;
}

.hero-greeting {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-greeting .wave {
  display: inline-block;
  animation: wave 2.5s ease-in-out infinite;
  transform-origin: 70% 70%;
}

.hero-name {
  font-size: clamp(2.8rem, 5.5vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.hero-role {
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 600;
  margin-bottom: 1.25rem;
  min-height: 2.2rem;
}

.hero-role .accent-text {
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 520px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-image-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-image-ring {
  position: relative;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image-ring::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--accent-gradient);
  animation: spin 8s linear infinite;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  padding: 3px;
}

.hero-image-ring::after {
  content: '';
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  border: 1px dashed var(--border);
  animation: spin-reverse 15s linear infinite;
  opacity: 0.5;
}

.hero-image {
  width: 340px;
  height: 340px;
  border-radius: 50%;
  object-fit: cover;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-xl);
}

/* Hero Stats Bar */
.hero-stats {
  display: flex;
  gap: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.hero-stat {
  text-align: left;
}

.hero-stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* Floating Orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  pointer-events: none;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  background: var(--accent);
  top: 10%;
  right: -5%;
  animation: float 6s ease-in-out infinite;
}

.hero-orb-2 {
  width: 300px;
  height: 300px;
  background: var(--accent-secondary);
  bottom: 10%;
  left: -3%;
  animation: float 8s ease-in-out infinite reverse;
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  margin-bottom: 1.25rem;
  font-size: 1.02rem;
}

.about-highlight {
  color: var(--accent);
  font-weight: 600;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.stat-card {
  background: var(--stat-bg);
  border: 1px solid var(--stat-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.stat-card:hover::before {
  transform: scaleX(1);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
   EXPERIENCE TIMELINE
   ========================================================================== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 3rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--timeline-line);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 2rem;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -2.55rem;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--timeline-dot);
  box-shadow: 0 0 0 4px var(--bg-primary), 0 0 0 6px var(--timeline-dot-glow);
  transition: all var(--transition-base);
  z-index: 2;
}

.timeline-item:hover .timeline-dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 4px var(--bg-primary), 0 0 20px var(--timeline-dot-glow);
}

.timeline-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: all var(--transition-base);
}

.timeline-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.timeline-role {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-subtle);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.timeline-company {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.timeline-details {
  list-style: none;
  padding: 0;
}

.timeline-details li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.timeline-details li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.skill-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.skill-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

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

.skill-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-subtle);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1.25rem;
  transition: all var(--transition-base);
}

.skill-card:hover .skill-card-icon {
  background: var(--accent-gradient);
  color: #FFFFFF;
  transform: scale(1.1);
}

.skill-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-chip {
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 500;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
}

.skill-chip:hover {
  background: var(--accent-subtle);
  color: var(--accent);
  border-color: var(--tag-border);
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.project-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-xl);
  transform: translateY(-6px);
  color: inherit;
}

.project-card-image {
  width: 100%;
  height: 220px;
  overflow: hidden;
  position: relative;
}

.project-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card-image img {
  transform: scale(1.08);
}

.project-card-image .project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.6) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 1.25rem;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-overlay-text {
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-card-content {
  padding: 1.5rem;
}

.project-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.project-card:hover .project-card-title {
  color: var(--accent);
}

.project-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* ==========================================================================
   EDUCATION SECTION
   ========================================================================== */
.education-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.education-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.education-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.education-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.education-degree {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.education-school {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.education-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.education-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--accent);
  background: var(--accent-subtle);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}

.education-gpa {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent);
}

/* ==========================================================================
   CERTIFICATIONS
   ========================================================================== */
.cert-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  transition: all var(--transition-base);
}

.cert-item:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  transform: translateX(6px);
}

.cert-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--accent-subtle);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.cert-item:hover .cert-icon {
  background: var(--accent-gradient);
  color: #FFFFFF;
}

.cert-text {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
}

.cert-text span {
  color: var(--text-muted);
  font-weight: 400;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-wrapper {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.contact-intro {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  line-height: 1.7;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
}

.contact-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-accent);
  transform: translateY(-3px);
  color: inherit;
}

.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--accent-subtle);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.contact-card:hover .contact-card-icon {
  background: var(--accent-gradient);
  color: #FFFFFF;
}

.contact-card-info {
  text-align: left;
}

.contact-card-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
}

.contact-card-value {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.social-btn {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow-accent);
  transform: translateY(-3px);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  transition: all var(--transition-base);
}

.footer-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-text .heart {
  color: #EF4444;
}

/* ==========================================================================
   PROJECT DETAIL PAGES
   ========================================================================== */
.project-hero {
  padding: 8rem 0 4rem;
  background: var(--bg-hero-gradient);
  position: relative;
  overflow: hidden;
}

.project-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: var(--bg-dot-pattern);
  background-size: 24px 24px;
  opacity: 0.4;
  pointer-events: none;
}

.project-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.project-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 2rem;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.project-back:hover {
  color: var(--accent);
  transform: translateX(-4px);
}

.project-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

.project-summary {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
}

.project-tags-center {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.project-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* Project Metrics */
.project-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  max-width: 900px;
  margin: -2rem auto 3rem;
  position: relative;
  z-index: 3;
  padding: 0 1.5rem;
}

.metric-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.metric-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.metric-value {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.25rem;
}

.metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Project Content */
.project-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.project-section {
  margin-bottom: 3rem;
}

.project-section-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--border);
  position: relative;
}

.project-section-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent-gradient);
}

.project-section p {
  margin-bottom: 1rem;
  font-size: 0.95rem;
  line-height: 1.8;
}

.project-section ul {
  list-style: none;
  padding: 0;
  margin-bottom: 1rem;
}

.project-section ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.6rem;
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.project-section ul li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

/* Embed Container */
.embed-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.embed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-tertiary);
}

.embed-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.embed-body {
  position: relative;
  padding-top: 65%;
}

.embed-body iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.embed-body img {
  width: 100%;
  height: auto;
}

/* ==========================================================================
   TERMINAL PAGE
   ========================================================================== */
.terminal-page {
  background: var(--terminal-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: 'JetBrains Mono', monospace;
  color: var(--terminal-text);
}

.terminal-header {
  background: #13141E;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #2A2B3D;
  user-select: none;
}

.terminal-dots {
  display: flex;
  gap: 8px;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red { background: #F7768E; }
.terminal-dot.yellow { background: #E0AF68; }
.terminal-dot.green { background: #9ECE6A; }

.terminal-title {
  font-size: 0.8rem;
  color: #565F89;
}

.terminal-nav-link {
  color: var(--terminal-cyan);
  font-size: 0.8rem;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.terminal-nav-link:hover {
  color: var(--terminal-accent);
}

.terminal-body {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
  font-size: 0.9rem;
  line-height: 1.8;
}

.terminal-output-line {
  margin-bottom: 0.25rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-input-line {
  display: flex;
  align-items: center;
  gap: 0;
}

.terminal-prompt {
  color: var(--terminal-accent);
  white-space: nowrap;
  user-select: none;
}

.terminal-prompt .user {
  color: var(--terminal-green);
}

.terminal-prompt .at {
  color: var(--terminal-text);
}

.terminal-prompt .host {
  color: var(--terminal-cyan);
}

.terminal-prompt .path {
  color: var(--terminal-yellow);
}

.terminal-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--terminal-text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  flex: 1;
  caret-color: var(--terminal-green);
  margin-left: 8px;
}

.terminal-link {
  color: var(--terminal-cyan);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.terminal-link:hover {
  color: var(--terminal-accent);
}

.terminal-heading {
  color: var(--terminal-accent);
  font-weight: 600;
}

.terminal-success {
  color: var(--terminal-green);
}

.terminal-accent-text {
  color: var(--terminal-cyan);
}

.terminal-dim {
  color: #565F89;
}

.terminal-highlight {
  color: var(--terminal-yellow);
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes spin-reverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

@keyframes wave {
  0% { transform: rotate(0deg); }
  10% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  30% { transform: rotate(14deg); }
  40% { transform: rotate(-4deg); }
  50% { transform: rotate(10deg); }
  60% { transform: rotate(0deg); }
  100% { transform: rotate(0deg); }
}

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

@keyframes typewriter-cursor {
  0%, 100% { border-right-color: var(--accent); }
  50% { border-right-color: transparent; }
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger children */
.stagger-children > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children > *:nth-child(2) { transition-delay: 80ms; }
.stagger-children > *:nth-child(3) { transition-delay: 160ms; }
.stagger-children > *:nth-child(4) { transition-delay: 240ms; }
.stagger-children > *:nth-child(5) { transition-delay: 320ms; }
.stagger-children > *:nth-child(6) { transition-delay: 400ms; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-tagline {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-image-ring {
    width: 280px;
    height: 280px;
  }

  .hero-image {
    width: 264px;
    height: 264px;
  }

  .hero-image-wrapper {
    order: -1;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

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

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

@media (max-width: 768px) {
  .section {
    padding: 4rem 0;
  }

  .navbar-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 6rem 0 4rem;
  }

  .hero-image-ring {
    width: 220px;
    height: 220px;
  }

  .hero-image {
    width: 208px;
    height: 208px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }

  .hero-stat {
    text-align: center;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .education-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .project-metrics {
    grid-template-columns: 1fr 1fr;
  }

  .timeline {
    padding-left: 2.5rem;
  }

  .timeline-header {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero-name {
    font-size: 2.2rem;
  }

  .hero-cta .btn {
    width: 100%;
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .project-metrics {
    grid-template-columns: 1fr;
  }
}