/* ==========================================================================
   VANSH SAINI - PROFESSIONAL PORTFOLIO DESIGN SYSTEM
   Modern, Technology-Focused, Deep Navy/Slate Glassmorphism Palette
   ========================================================================== */

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

:root {
  /* Color Palette - Deep Slate & Navy */
  --bg-primary: #070c18;
  --bg-secondary: #0b1329;
  --bg-tertiary: #101c3d;
  
  /* Glassmorphism Surface Colors */
  --glass-bg: rgba(15, 23, 42, 0.72);
  --glass-bg-hover: rgba(22, 34, 62, 0.85);
  --glass-bg-card: rgba(16, 26, 50, 0.65);
  --glass-border: rgba(99, 140, 255, 0.16);
  --glass-border-focus: rgba(96, 165, 250, 0.45);
  --glass-border-active: rgba(6, 182, 212, 0.55);
  
  /* Accent Colors */
  --accent-blue: #3b82f6;
  --accent-blue-light: #60a5fa;
  --accent-cyan: #06b6d4;
  --accent-cyan-light: #22d3ee;
  --accent-emerald: #10b981;
  --accent-emerald-light: #34d399;
  --accent-purple: #8b5cf6;
  --accent-amber: #f59e0b;
  
  /* Gradients */
  --grad-primary: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --grad-accent: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
  --grad-glow: radial-gradient(circle at center, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  --grad-card-header: linear-gradient(180deg, rgba(30, 58, 110, 0.3) 0%, transparent 100%);
  
  /* Text Colors */
  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Layout & Spacing */
  --max-width: 1200px;
  --nav-height: 76px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
  --shadow-glow-blue: 0 0 25px rgba(59, 130, 246, 0.25);
  --shadow-glow-cyan: 0 0 25px rgba(6, 182, 212, 0.25);
  
  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-secondary);
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 10% 10%, rgba(59, 130, 246, 0.08) 0px, transparent 50%),
    radial-gradient(at 90% 20%, rgba(6, 182, 212, 0.06) 0px, transparent 50%),
    radial-gradient(at 50% 80%, rgba(139, 92, 246, 0.05) 0px, transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background interactive canvas */
#background-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.75;
}

/* Modern Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #334155;
}

/* Selection */
::selection {
  background: rgba(59, 130, 246, 0.35);
  color: #fff;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-main);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  position: relative;
  z-index: 1;
}

.section {
  padding: 6.5rem 0;
  position: relative;
  z-index: 1;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.75rem auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(96, 165, 250, 0.25);
  color: var(--accent-blue-light);
  font-size: 0.825rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.section-tag .tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.section-title .gradient-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ----------------- Glassmorphism & UI Components ----------------- */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--glass-border-focus);
  box-shadow: var(--shadow-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad-primary);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(59, 130, 246, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.5);
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(16, 26, 50, 0.7);
  backdrop-filter: blur(8px);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: rgba(30, 48, 88, 0.8);
  border-color: var(--accent-blue-light);
  transform: translateY(-2px);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan-light);
  border: 1px solid rgba(6, 182, 212, 0.4);
}

.btn-outline:hover {
  background: rgba(6, 182, 212, 0.12);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  color: #fff;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: 6px;
}

.btn-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 50%;
}

/* ----------------- Header & Sticky Navbar ----------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 100;
  transition: background-color var(--transition-normal), border-color var(--transition-normal), backdrop-filter var(--transition-normal);
}

.header.scrolled {
  background: rgba(7, 12, 24, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(99, 140, 255, 0.14);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-main);
}

.logo-symbol {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #1e3a8a, #0e7490);
  border: 1px solid rgba(96, 165, 250, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  box-shadow: 0 0 14px rgba(59, 130, 246, 0.3);
}

.brand-name {
  display: flex;
  flex-direction: column;
}

.brand-name .name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

.brand-name .sub {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 0.4rem 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  transition: width var(--transition-normal);
  border-radius: 2px;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-main);
}

.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(16, 26, 50, 0.7);
  border: 1px solid var(--glass-border);
  padding: 8px;
  z-index: 101;
}

.mobile-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-toggle.open span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ----------------- Hero Section ----------------- */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + 2rem);
  padding-bottom: 4rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.badge-wrapper {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-emerald-light);
  font-size: 0.825rem;
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulseDot 2s infinite ease-in-out;
}

.lpu-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--accent-blue-light);
  font-size: 0.825rem;
  font-weight: 500;
}

.hero-headline {
  font-size: clamp(2.4rem, 4.5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.hero-headline .gradient-highlight {
  background: linear-gradient(135deg, #60a5fa 0%, #22d3ee 50%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subheadline {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 580px;
}

.hero-subheadline strong {
  color: var(--text-main);
  font-weight: 600;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
}

.hero-social-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.social-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  background: rgba(16, 26, 50, 0.4);
  border: 1px solid var(--glass-border);
  transition: all var(--transition-fast);
}

.social-item:hover {
  color: var(--text-main);
  border-color: var(--accent-blue-light);
  background: rgba(30, 48, 88, 0.6);
  transform: translateY(-1px);
}

/* Hero Code Visual Card */
.hero-code-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(11, 19, 41, 0.85);
  border: 1px solid rgba(96, 165, 250, 0.25);
  box-shadow: var(--shadow-lg), 0 0 35px rgba(59, 130, 246, 0.12);
  backdrop-filter: blur(16px);
}

.code-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.window-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.file-tab {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.code-card-body {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.65;
  color: #e2e8f0;
  overflow-x: auto;
}

.code-line {
  display: flex;
  margin-bottom: 0.2rem;
}

.line-num {
  width: 2rem;
  color: #475569;
  user-select: none;
  flex-shrink: 0;
}

.line-code {
  flex-grow: 1;
}

/* Syntax Highlighting */
.syn-kw { color: #f43f5e; font-weight: 600; }
.syn-var { color: #60a5fa; }
.syn-prop { color: #38bdf8; }
.syn-str { color: #34d399; }
.syn-arr { color: #facc15; }
.syn-num { color: #fb923c; }
.syn-bool { color: #a78bfa; }
.syn-comment { color: #64748b; font-style: italic; }

.card-status-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.25rem;
  background: rgba(10, 16, 32, 0.9);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent-emerald-light);
}

/* Quick Metrics Bar */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 3.5rem;
  padding: 1.5rem;
  background: rgba(13, 22, 44, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
}

.metric-item {
  display: flex;
  flex-direction: column;
  padding: 0.5rem 1rem;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.metric-item:last-child {
  border-right: none;
}

.metric-val {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-main);
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.metric-label {
  font-size: 0.825rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ----------------- About Section ----------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.about-lead {
  font-size: 1.15rem;
  color: var(--text-main);
  font-weight: 500;
  line-height: 1.7;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.highlight-box {
  padding: 1rem;
  background: rgba(16, 26, 52, 0.5);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  display: flex;
  gap: 0.75rem;
}

.highlight-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.highlight-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}

.highlight-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.about-pillars {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.pillar-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  overflow: hidden;
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--grad-primary);
  opacity: 0.7;
}

.pillar-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.pillar-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
}

.pillar-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ----------------- Skills Section ----------------- */
.skills-filter-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 2.75rem;
}

.filter-btn {
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-full);
  background: rgba(16, 26, 50, 0.5);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  background: rgba(30, 48, 88, 0.6);
  color: var(--text-main);
  border-color: rgba(96, 165, 250, 0.35);
}

.filter-btn.active {
  background: var(--grad-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.skill-category-card {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: all var(--transition-normal);
}

.skill-category-card.hidden {
  display: none;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.category-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.category-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.skill-tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  background: rgba(22, 34, 64, 0.65);
  border: 1px solid rgba(99, 140, 255, 0.18);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  background: rgba(37, 56, 102, 0.8);
  border-color: var(--accent-blue-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.skill-tag svg {
  width: 14px;
  height: 14px;
  color: var(--accent-cyan);
}

.skill-category-card p.category-note {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: auto;
  padding-top: 0.5rem;
}

/* ----------------- Projects Section ----------------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 2rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-border-focus);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(59, 130, 246, 0.15);
}

.project-visual-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #091122;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.project-card:hover .project-img {
  transform: scale(1.03);
}

.project-date-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(7, 12, 24, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-cyan);
}

.project-type-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(59, 130, 246, 0.85);
  backdrop-filter: blur(8px);
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
}

.project-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  gap: 1rem;
}

.project-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

.project-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex-grow: 1;
}

.project-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tech-chip {
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  background: rgba(16, 26, 50, 0.6);
  border: 1px solid rgba(99, 140, 255, 0.15);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-blue-light);
}

.project-footer-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ----------------- Experience & Education ----------------- */
.dual-timeline-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.timeline-column-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.timeline-column-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-column-title {
  font-size: 1.35rem;
  font-weight: 700;
}

.timeline-track {
  position: relative;
  padding-left: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.timeline-track::before {
  content: '';
  position: absolute;
  top: 0.5rem;
  bottom: 0.5rem;
  left: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-blue) 0%, rgba(99, 140, 255, 0.1) 100%);
}

.timeline-item {
  position: relative;
}

.timeline-node {
  position: absolute;
  left: -2rem;
  top: 0.4rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.timeline-card {
  padding: 1.5rem;
}

.timeline-card-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.timeline-role {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  font-weight: 500;
}

.timeline-org {
  font-size: 0.925rem;
  color: var(--accent-blue-light);
  font-weight: 500;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.timeline-bullets {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.timeline-bullets li {
  font-size: 0.875rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 1.2rem;
  line-height: 1.5;
}

.timeline-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
  font-size: 0.9rem;
}

.grade-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-emerald-light);
  font-family: var(--font-mono);
  font-size: 0.775rem;
  font-weight: 600;
  margin-top: 0.5rem;
}

/* ----------------- Contact Section ----------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 3rem;
  align-items: start;
}

.contact-info-col {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-info-card {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-direct-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: rgba(14, 23, 46, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.contact-item-row:hover {
  border-color: var(--accent-blue-light);
  background: rgba(22, 36, 68, 0.7);
}

.contact-item-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.contact-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.contact-value {
  font-size: 0.925rem;
  color: var(--text-main);
  font-weight: 500;
}

.copy-btn {
  padding: 0.4rem 0.65rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
}

.contact-social-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.social-card-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  background: rgba(14, 23, 46, 0.6);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.social-card-btn:hover {
  background: rgba(30, 48, 88, 0.75);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* Contact Form */
.contact-form-card {
  padding: 2.25rem;
}

.form-title {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.form-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(10, 16, 32, 0.7);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-blue-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
  background: rgba(14, 22, 44, 0.9);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-dim);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-feedback {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ----------------- Footer ----------------- */
.footer {
  padding: 4rem 0 2rem 0;
  border-top: 1px solid rgba(99, 140, 255, 0.12);
  background: rgba(5, 9, 18, 0.95);
  position: relative;
  z-index: 1;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

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

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-cyan-light);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.back-to-top-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  background: rgba(16, 26, 50, 0.5);
  border: 1px solid var(--glass-border);
  transition: all var(--transition-fast);
}

.back-to-top-btn:hover {
  color: #fff;
  border-color: var(--accent-blue-light);
  background: rgba(30, 48, 88, 0.7);
}

/* ----------------- Project Modal ----------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-window {
  width: 100%;
  max-width: 850px;
  max-height: 90vh;
  overflow-y: auto;
  background: #0d152b;
  border: 1px solid rgba(96, 165, 250, 0.3);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 50px rgba(59, 130, 246, 0.2);
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.modal-overlay.active .modal-window {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(13, 22, 44, 0.8);
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 700;
}

.modal-close-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: #ef4444;
  color: #fff;
  border-color: #ef4444;
}

.modal-body {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  color: var(--text-secondary);
}

.modal-diagram-container {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(99, 140, 255, 0.2);
  background: #080f1e;
}

/* ----------------- Toast Notifications ----------------- */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  background: #0f1c3a;
  border: 1px solid var(--accent-blue-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 500;
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-normal);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-icon {
  color: var(--accent-cyan);
}

/* ----------------- Responsive Media Queries ----------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .about-grid,
  .dual-timeline-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .metrics-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .metric-item:nth-child(2) {
    border-right: none;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: rgba(7, 12, 24, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    gap: 1.25rem;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
  }
  
  .nav-menu.open {
    transform: translateX(0);
  }
  
  .nav-link {
    font-size: 1.15rem;
    width: 100%;
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  
  .nav-actions {
    display: none;
  }
  
  .nav-menu .nav-actions-mobile {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
    margin-top: 1rem;
  }
  
  .about-pillars {
    grid-template-columns: 1fr;
  }
  
  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .metrics-strip {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .hero-headline {
    font-size: 2.1rem;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta-group .btn {
    width: 100%;
  }
  
  .metrics-strip {
    grid-template-columns: 1fr;
  }
  
  .metric-item {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding: 0.75rem 0;
  }
  
  .metric-item:last-child {
    border-bottom: none;
  }
  
  .about-highlights {
    grid-template-columns: 1fr;
  }
  
  .contact-social-grid {
    grid-template-columns: 1fr;
  }
}

/* ----------------- Print Stylesheet ----------------- */
@media print {
  body {
    background: #ffffff;
    color: #1e293b;
  }
  
  #background-canvas,
  .header,
  .mobile-toggle,
  .hero-social-links,
  .hero-cta-group,
  .skills-filter-nav,
  .modal-overlay,
  .toast-container,
  .back-to-top-btn {
    display: none !important;
  }
  
  .section {
    padding: 1.5rem 0;
  }
  
  .glass-card,
  .hero-code-card {
    background: transparent !important;
    border: 1px solid #cbd5e1 !important;
    box-shadow: none !important;
    color: #1e293b !important;
  }
  
  .section-title,
  .hero-headline,
  .project-title {
    color: #0f172a !important;
  }
  
  .gradient-text,
  .gradient-highlight,
  .metric-val {
    -webkit-text-fill-color: #2563eb !important;
  }
}