/* 
========================================================================
PREMIUM PORTFOLIO STYLESHEET
Client: Sahul Hameed K (Game Developer & Software Engineer)
Aesthetics: Apple, Vercel, Stripe, Awwwards
========================================================================
*/

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* ==========================================
1. DESIGN SYSTEM & CSS VARIABLES
========================================== */
:root {
  --font-heading: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Fira Code', monospace;

  /* Dark Mode Default Values */
  --bg-base: #030303;
  --bg-surface: rgba(10, 10, 15, 0.6);
  --bg-surface-hover: rgba(18, 18, 26, 0.85);
  --border-color: rgba(255, 255, 255, 0.06);
  --border-color-hover: rgba(255, 255, 255, 0.15);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #6366f1;
  /* Indigo */
  --accent-secondary: #06b6d4;
  /* Cyan */
  --accent-tertiary: #10b981;
  /* Emerald */
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #06b6d4 100%);
  --accent-gradient-text: linear-gradient(135deg, #a5b4fc 0%, #f472b6 50%, #22d3ee 100%);

  --glow-color: rgba(99, 102, 241, 0.12);
  --glow-color-secondary: rgba(6, 182, 212, 0.12);

  --shadow-sm: 0 4px 12px -2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px -4px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 50px -10px rgba(0, 0, 0, 0.7);

  --transition-fast: 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-normal: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-slow: 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);

  --scroll-progress-bg: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] {
  /* Light Mode Values */
  --bg-base: #f7fafc;
  --bg-surface: rgba(255, 255, 255, 0.65);
  --bg-surface-hover: rgba(255, 255, 255, 0.95);
  --border-color: rgba(15, 23, 42, 0.08);
  --border-color-hover: rgba(15, 23, 42, 0.18);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --accent-primary: #4f46e5;
  --accent-secondary: #0891b2;
  --accent-tertiary: #059669;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #9333ea 50%, #0891b2 100%);
  --accent-gradient-text: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);

  --glow-color: rgba(79, 70, 229, 0.06);
  --glow-color-secondary: rgba(8, 145, 178, 0.06);

  --shadow-sm: 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 8px 30px -4px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px -10px rgba(15, 23, 42, 0.12);

  --scroll-progress-bg: rgba(0, 0, 0, 0.03);
}

/* ==========================================
2. BASE RESET & INITIALIZATION
========================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  outline: none;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color-hover);
  border-radius: 10px;
  border: 2px solid var(--bg-base);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* Selection */
::selection {
  background-color: var(--accent-primary);
  color: #ffffff;
}

/* ==========================================
3. DYNAMIC BACKGROUND & GLOW EFFECTS
========================================== */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.6;
}

/* Mouse cursor glow tracker */
.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--glow-color) 0%, rgba(0, 0, 0, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: -2;
  transition: width 0.3s ease, height 0.3s ease;
  will-change: transform;
}

[data-theme="light"] .cursor-glow {
  background: radial-gradient(circle, rgba(79, 70, 229, 0.04) 0%, rgba(0, 0, 0, 0) 70%);
}

/* Custom visual dot cursor */
.custom-cursor {
  width: 8px;
  height: 8px;
  background-color: var(--text-primary);
  border-radius: 50%;
  position: fixed;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: difference;
  transition: width 0.2s, height 0.2s, background-color 0.2s;
}

.custom-cursor-ring {
  width: 40px;
  height: 40px;
  border: 1px solid var(--text-secondary);
  border-radius: 50%;
  position: fixed;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 9998;
  transition: transform 0.08s ease-out, width 0.3s, height 0.3s, border-color 0.3s;
}

/* ==========================================
4. LOADING ANIMATION (PRELOADER)
========================================== */
.preloader {
  position: fixed;
  inset: 0;
  background-color: #030303;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.fade-out {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader-logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2.5rem;
  letter-spacing: -1px;
  color: #fff;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 30%, #94a3b8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0;
  transform: translateY(20px);
  animation: preloaderReveal 0.8s forwards ease;
}

.preloader-bar-container {
  width: 200px;
  height: 2px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
}

.preloader-bar {
  width: 0%;
  height: 100%;
  background: var(--accent-gradient);
  animation: preloaderFill 1.8s cubic-bezier(0.65, 0, 0.35, 1) forwards;
}

/* ==========================================
5. HEADER & GLASSMORPHIC NAVBAR
========================================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: background-color var(--transition-normal), backdrop-filter var(--transition-normal), border-bottom var(--transition-normal);
  border-bottom: 1px solid transparent;
}

header.scrolled {
  background-color: var(--bg-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.scroll-progress-container {
  width: 100%;
  height: 3px;
  background-color: var(--scroll-progress-bg);
  position: absolute;
  bottom: 0;
  left: 0;
}

.scroll-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  transition: width 0.05s linear;
}

.nav-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-link {
  text-decoration: none;
}

.logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: inline-block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.2rem;
  list-style: none;
}

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

.nav-item a:hover,
.nav-item a.active {
  color: var(--text-primary);
}

.nav-item a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-normal);
  border-radius: 4px;
}

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

.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.5rem;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  background-color: rgba(255, 255, 255, 0.02);
}

.theme-toggle-btn:hover {
  border-color: var(--border-color-hover);
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

.theme-toggle-btn i {
  font-size: 1.15rem;
}

/* Light theme icons */
.theme-toggle-btn .fa-sun {
  display: none;
}

[data-theme="light"] .theme-toggle-btn .fa-moon {
  display: none;
}

[data-theme="light"] .theme-toggle-btn .fa-sun {
  display: block;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================
6. LAYOUT WRAPPERS & UTILITIES
========================================== */
section {
  padding: 8rem 2rem 6rem 2rem;
  max-width: 1300px;
  margin: 0 auto;
  position: relative;
}

.section-tag {
  font-family: var(--font-mono);
  color: var(--accent-primary);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 2.75rem;
  letter-spacing: -1px;
  margin-bottom: 3.5rem;
  line-height: 1.2;
}

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

/* Glassmorphism Card Template */
.glass-card {
  position: relative;
  background: var(--bg-surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 20px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 1.5px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02) 50%, rgba(255, 255, 255, 0.04));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  pointer-events: none;
  z-index: 1;
  transition: background var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-5px);
  background-color: var(--bg-surface-hover);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-lg), 0 0 30px var(--glow-color);
}

.glass-card:hover::before {
  background: var(--accent-gradient);
}

/* Premium Button Styling */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.8rem;
  border-radius: 14px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5), 0 0 15px rgba(6, 182, 212, 0.3);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
}

/* Scroll-reveal animation system */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1), transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1), transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

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

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1), transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

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

/* ==========================================
7. HOME (HERO) SECTION
========================================== */
#home {
  display: flex;
  min-height: 100vh;
  align-items: center;
  padding-top: 8rem;
  padding-bottom: 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
  width: 100%;
}

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

.hero-hello {
  font-family: var(--font-mono);
  color: var(--accent-primary);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

.hero-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 4.5rem;
  letter-spacing: -2.5px;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  min-height: 4.2rem;
  height: auto;
  display: flex;
  align-items: center;
}

.typed-cursor {
  color: var(--accent-secondary);
  animation: cursorBlink 1s infinite;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-socials {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.social-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.social-link {
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.social-link:hover {
  color: var(--text-primary);
  transform: translateY(-3px) scale(1.1);
}

/* Hero Portrait Card (Game Developer Concept) */
.hero-portrait-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.portrait-frame {
  position: relative;
  width: 340px;
  height: 380px;
  border-radius: 24px;
}

.portrait-glow {
  position: absolute;
  inset: -15px;
  background: var(--accent-gradient);
  filter: blur(35px);
  opacity: 0.3;
  border-radius: 30px;
  z-index: -1;
  animation: pulseGlow 8s infinite alternate;
}

.portrait-card {
  width: 100%;
  height: 100%;
  background: rgba(15, 15, 25, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform var(--transition-normal);
}

.portrait-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), transparent);
  pointer-events: none;
}

.portrait-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.portrait-dot-group {
  display: flex;
  gap: 6px;
}

.portrait-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.portrait-dot.red {
  background-color: #ef4444;
}

.portrait-dot.yellow {
  background-color: #eab308;
}

.portrait-dot.green {
  background-color: #22c55e;
}

.portrait-version {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Geometric visual generator representing game nodes */
.portrait-avatar-container {
  height: 200px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.avatar-shape-glow {
  position: absolute;
  width: 100px;
  height: 100px;
  background: var(--accent-primary);
  filter: blur(25px);
  opacity: 0.4;
  border-radius: 50%;
  animation: floatShape 4s infinite alternate;
}

.avatar-wireframe {
  width: 120px;
  height: 120px;
  border: 2px dashed rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: rotateShape 20s linear infinite;
  z-index: 1;
}

.avatar-solid {
  width: 80px;
  height: 80px;
  background: var(--accent-gradient);
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: morphShape 8s ease-in-out infinite alternate;
  z-index: 2;
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

.avatar-solid i {
  color: #fff;
  font-size: 2.2rem;
  animation: floatIcon 3s infinite ease-in-out alternate;
}

.portrait-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1rem;
}

.portrait-stat-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.portrait-stat-value {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

/* Floating helper geometric objects */
.floating-shape {
  position: absolute;
  pointer-events: none;
  opacity: 0.25;
  filter: blur(1px);
  z-index: -1;
}

.shape-1 {
  top: -10%;
  right: -5%;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, var(--accent-secondary) 0%, transparent 70%);
  animation: float 6s ease-in-out infinite alternate;
}

.shape-2 {
  bottom: 10%;
  left: -10%;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
  animation: float 8s ease-in-out infinite 0.5s alternate;
}

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

.about-intro-card {
  padding: 2.5rem;
}

.about-intro-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

.about-intro-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.about-objective-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.about-objective-title i {
  color: var(--accent-secondary);
}

.about-objective-box {
  background: rgba(255, 255, 255, 0.02);
  border-left: 3px solid var(--accent-secondary);
  padding: 1.25rem;
  border-radius: 0 12px 12px 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

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

.stat-item {
  padding: 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background-color: rgba(99, 102, 241, 0.08);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1.25rem;
}

.stat-item:nth-child(2) .stat-icon {
  background-color: rgba(6, 182, 212, 0.08);
  color: var(--accent-secondary);
}

.stat-item:nth-child(3) .stat-icon {
  background-color: rgba(16, 185, 129, 0.08);
  color: var(--accent-tertiary);
}

.stat-item:nth-child(4) .stat-icon {
  background-color: rgba(168, 85, 247, 0.08);
  color: #a855f7;
}

.stat-number {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2.2rem;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-text {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
}

.about-interests-grid {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.interest-card {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.interest-icon {
  font-size: 1.4rem;
  color: var(--accent-primary);
}

.interest-card:nth-child(even) .interest-icon {
  color: var(--accent-secondary);
}

.interest-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
}

/* ==========================================
9. SKILLS SECTION
========================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.skills-category {
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
}

.skills-category-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.skills-category-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--accent-secondary);
  transition: all var(--transition-fast);
}

.skills-category:hover .skills-category-icon {
  background: var(--accent-primary);
  color: #fff;
}

.skills-category-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
}

.skills-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  flex-grow: 1;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.skill-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.skill-percentage {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.skill-track {
  width: 100%;
  height: 6px;
  background-color: var(--border-color);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}

.skill-bar {
  height: 100%;
  width: 0%;
  /* Populated by JS for scroll trigger */
  background: var(--accent-gradient);
  border-radius: 10px;
  transition: width 1.5s cubic-bezier(0.1, 1, 0.1, 1);
}

.skills-category:nth-child(2) .skill-bar {
  background: linear-gradient(90deg, #6366f1, #3b82f6);
}

.skills-category:nth-child(3) .skill-bar {
  background: linear-gradient(90deg, #a855f7, #ec4899);
}

/* ==========================================
10. EDUCATION & EXPERIENCE (TIMELINE)
========================================== */
.timeline-container {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background-color: var(--border-color);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: 4rem;
  width: 100%;
  display: flex;
  justify-content: flex-end;
}

.timeline-item:nth-child(even) {
  justify-content: flex-start;
}

.timeline-badge {
  position: absolute;
  top: 2rem;
  left: 50%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--bg-base);
  border: 4px solid var(--accent-primary);
  transform: translateX(-50%);
  z-index: 10;
  transition: all var(--transition-fast);
}

.timeline-item:hover .timeline-badge {
  background-color: var(--accent-primary);
  box-shadow: 0 0 15px var(--accent-primary);
}

.timeline-item:nth-child(even) .timeline-badge {
  border-color: var(--accent-secondary);
}

.timeline-item:nth-child(even):hover .timeline-badge {
  background-color: var(--accent-secondary);
  box-shadow: 0 0 15px var(--accent-secondary);
}

.timeline-card {
  width: 44%;
  padding: 2.25rem;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: block;
}

.timeline-item:nth-child(even) .timeline-date {
  color: var(--accent-secondary);
}

.timeline-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.timeline-subtitle {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.timeline-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.25rem 0.6rem;
  border-radius: 8px;
}

/* Project Filters */
.project-filters {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.6rem 1.25rem;
  border-radius: 12px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--border-color-hover);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

.filter-btn.active {
  background: rgba(6, 182, 212, 0.08);
  border-color: var(--accent-secondary);
  color: var(--text-primary);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.15);
}

/* Filter Item Transitions */
.filter-item {
  transition: opacity 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  transform: scale(1);
  opacity: 1;
}

.filter-item.hidden-animate {
  transform: scale(0.85);
  opacity: 0;
}

.filter-item.hidden-layout {
  display: none !important;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.project-card {
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Code-themed patterns for placeholders */
.project-image-placeholder {
  height: 200px;
  position: relative;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.8) 0%, rgba(30, 41, 59, 0.9) 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}

.project-image-placeholder::before {
  content: '</>';
  font-family: var(--font-mono);
  font-size: 3rem;
  color: rgba(255, 255, 255, 0.05);
  position: absolute;
  font-weight: 700;
  transform: rotate(-10deg);
}

.project-image-placeholder i {
  font-size: 3rem;
  color: var(--accent-secondary);
  opacity: 0.8;
  z-index: 2;
  transition: all var(--transition-normal);
}

.project-card:hover .project-image-placeholder i {
  transform: scale(1.15) rotate(5deg);
  color: var(--accent-primary);
}

/* Code coordinate grid line overlay */
.project-grid-overlay {
  position: absolute;
  inset: 0;
  background-size: 15px 15px;
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
}

.project-body {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  line-height: 1.5;
  flex-grow: 1;
}

.project-features {
  list-style: none;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.project-features li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.4rem;
}

.project-features li::before {
  content: '→';
  color: var(--accent-secondary);
  position: absolute;
  left: 0;
}

.project-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 2rem;
}

.project-links {
  display: flex;
  gap: 1rem;
  margin-top: auto;
}

.project-link-btn {
  text-decoration: none;
  font-size: 0.85rem;
  font-family: var(--font-heading);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.project-link-btn:hover {
  color: var(--text-primary);
}

.project-link-btn i {
  font-size: 0.95rem;
}

/* ==========================================
12. CERTIFICATIONS & ACHIEVEMENTS
========================================== */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 5rem;
}

.cert-card {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
}

.cert-icon {
  font-size: 2.2rem;
  color: var(--accent-secondary);
  margin-bottom: 1.5rem;
}

.cert-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  flex-grow: 1;
}

.cert-org {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.cert-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.cert-verify-btn {
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap var(--transition-fast), color var(--transition-fast);
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1rem;
}

.cert-verify-btn:hover {
  color: var(--text-primary);
  gap: 0.6rem;
}

/* Achievements styles */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.achievement-card {
  padding: 2.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}

.achievement-trophy {
  font-size: 1.75rem;
  color: #eab308;
  /* Gold color */
  background-color: rgba(234, 179, 8, 0.08);
  width: 50px;
  height: 50px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.achievement-info {
  display: flex;
  flex-direction: column;
}

.achievement-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.achievement-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ==========================================
13. RESUME SECTION
========================================== */
/* ==========================================
13. RESUME SECTION
========================================== */
.resume-wrapper {
  max-width: 1050px;
  margin: 0 auto;
}

/* Resume Tabs */
.resume-tabs {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.resume-tab-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.85rem 1.75rem;
  border-radius: 14px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  transition: all var(--transition-fast);
}

.resume-tab-btn:hover {
  border-color: var(--border-color-hover);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

.resume-tab-btn.active {
  background: rgba(99, 102, 241, 0.08);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

.resume-card-container {
  display: none;
  opacity: 0;
  transition: opacity 0.4s ease-in-out;
}

.resume-card-container.active {
  display: block;
  opacity: 1;
}

/* Digital Resume Sheet Design */
.digital-resume {
  padding: 3rem;
  background: rgba(10, 10, 15, 0.4);
  border-radius: 20px;
}

[data-theme="light"] .digital-resume {
  background: rgba(255, 255, 255, 0.4);
}

/* Header */
.dr-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
  margin-bottom: 2.5rem;
  gap: 2rem;
}

.dr-name {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  color: var(--text-primary);
}

.dr-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--accent-secondary);
  font-weight: 600;
  margin-top: 0.4rem;
}

.dr-header-right {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-end;
  font-size: 0.85rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.dr-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dr-meta-item i {
  color: var(--accent-primary);
}

/* Body Columns */
.dr-body {
  display: grid;
  grid-template-columns: 1fr 2.2fr;
  gap: 3rem;
}

.dr-sidebar {
  border-right: 1px solid var(--border-color);
  padding-right: 2.5rem;
}

.dr-section {
  margin-bottom: 2.5rem;
}

.dr-section:last-child {
  margin-bottom: 0;
}

.dr-section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-bottom: 1.5px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.dr-section-title i {
  color: var(--accent-primary);
  font-size: 0.95rem;
}

/* Skills */
.dr-skill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.dr-skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
  transition: all var(--transition-fast);
}

.dr-skill-tag:hover {
  border-color: var(--accent-secondary);
  color: var(--text-primary);
  background-color: rgba(6, 182, 212, 0.05);
  transform: translateY(-1px);
}

.dr-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.dr-text strong {
  color: var(--text-primary);
}

.dr-text-highlight {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  font-style: italic;
  border-left: 3px solid var(--accent-secondary);
  padding-left: 1.25rem;
}

.dr-list {
  list-style: none;
}

.dr-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.6rem;
}

.dr-list li::before {
  content: '✦';
  color: var(--accent-primary);
  position: absolute;
  left: 0;
  font-size: 0.8rem;
}

/* Main Content elements */
.dr-timeline-item {
  margin-bottom: 1.5rem;
}

.dr-timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.3rem;
  gap: 1rem;
}

.dr-timeline-header h5 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.dr-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  font-weight: 600;
  flex-shrink: 0;
}

.dr-sub {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.dr-project-item {
  margin-bottom: 1.5rem;
  background-color: rgba(255, 255, 255, 0.01);
  border: 1px solid rgba(255, 255, 255, 0.02);
  padding: 1.5rem;
  border-radius: 14px;
  transition: all var(--transition-fast);
}

.dr-project-item:hover {
  border-color: var(--border-color-hover);
  background-color: rgba(255, 255, 255, 0.02);
}

.dr-project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  gap: 1rem;
}

.dr-project-header h5 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.dr-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background-color: rgba(99, 102, 241, 0.08);
  color: var(--accent-primary);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  border: 1px solid rgba(99, 102, 241, 0.15);
  flex-shrink: 0;
}

.dr-techs-used {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  border-top: 1px dashed var(--border-color);
  padding-top: 0.5rem;
}

/* PDF Embed Wrapper */
.resume-embed-container {
  width: 100%;
  height: 600px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  margin-bottom: 2.5rem;
  overflow: hidden;
  background-color: rgba(0, 0, 0, 0.2);
  display: flex;
  justify-content: center;
  align-items: center;
}

.resume-actions {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Responsive adjustments for Digital Resume */
@media (max-width: 900px) {
  .dr-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .dr-header-right {
    align-items: flex-start;
  }

  .dr-body {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .dr-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding-right: 0;
    padding-bottom: 2rem;
  }
}

@media (max-width: 480px) {
  .digital-resume {
    padding: 1.5rem;
  }

  .dr-name {
    font-size: 1.8rem;
  }

  .dr-timeline-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
  }

  .dr-project-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
}

/* ==========================================
14. CONTACT SECTION
========================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}

.contact-info-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background-color: var(--border-color);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.contact-info-item:hover .contact-info-icon {
  background-color: var(--accent-primary);
  color: #fff;
}

.contact-info-details {
  display: flex;
  flex-direction: column;
}

.contact-info-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-info-val {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1.05rem;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.contact-info-val:hover {
  color: var(--accent-secondary);
}

/* Glass Contact Form */
.contact-form {
  padding: 3rem;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

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

.form-control {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 0.9rem 1.25rem;
  border-radius: 12px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-primary);
  background-color: rgba(255, 255, 255, 0.04);
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

.form-status-msg {
  grid-column: 1 / -1;
  padding: 1rem;
  border-radius: 10px;
  font-size: 0.9rem;
  display: none;
}

.form-status-msg.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--accent-tertiary);
}

.form-status-msg.error {
  display: block;
  background-color: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #ef4444;
}

/* ==========================================
15. FOOTER & BACK TO TOP BUTTON
========================================== */
footer {
  border-top: 1px solid var(--border-color);
  background-color: rgba(5, 5, 10, 0.8);
  padding: 4rem 2rem;
  position: relative;
}

[data-theme="light"] footer {
  background-color: rgba(240, 242, 245, 0.8);
}

.footer-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.footer-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

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

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-socials {
  display: flex;
  gap: 1.25rem;
}

.footer-social-link {
  color: var(--text-muted);
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* Back to Top button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  z-index: 99;
  transition: all var(--transition-normal);
  opacity: 0;
  visibility: hidden;
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(99, 102, 241, 0.4);
}

/* ==========================================
16. CSS ANIMATIONS & KEYFRAMES
========================================== */
@keyframes preloaderReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes preloaderFill {
  to {
    width: 100%;
  }
}

@keyframes cursorBlink {
  50% {
    opacity: 0;
  }
}

@keyframes pulseGlow {
  0% {
    transform: scale(1);
    opacity: 0.25;
  }

  100% {
    transform: scale(1.15);
    opacity: 0.35;
  }
}

@keyframes float {
  0% {
    transform: translateY(0px) rotate(0deg);
  }

  50% {
    transform: translateY(-10px) rotate(2deg);
  }

  100% {
    transform: translateY(0px) rotate(0deg);
  }
}

@keyframes floatShape {
  0% {
    transform: translate(0px, 0px) scale(1);
  }

  100% {
    transform: translate(10px, -15px) scale(1.05);
  }
}

@keyframes rotateShape {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

@keyframes morphShape {
  0% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }

  100% {
    border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
  }
}

@keyframes floatIcon {
  0% {
    transform: translateY(0);
  }

  100% {
    transform: translateY(-5px);
  }
}

@keyframes pulseOcr {
  0% {
    transform: scale(1);
    filter: drop-shadow(0 0 0px var(--accent-primary));
  }

  100% {
    transform: scale(1.05);
    filter: drop-shadow(0 0 15px var(--accent-primary));
  }
}

/* ==========================================
17. RESPONSIVE DESIGN (MEDIA QUERIES)
========================================== */
@media (max-width: 1024px) {
  section {
    padding: 6rem 1.5rem 4rem 1.5rem;
  }

  .hero-name {
    font-size: 3.5rem;
  }

  .hero-subtitle {
    font-size: 1.8rem;
    height: 3.5rem;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

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

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

  .timeline-line {
    left: 20px;
  }

  .timeline-badge {
    left: 20px;
  }

  .timeline-item {
    justify-content: flex-start;
  }

  .timeline-card {
    width: calc(100% - 50px);
    margin-left: 50px;
  }

  .timeline-item:nth-child(even) {
    justify-content: flex-start;
  }

  .timeline-item:nth-child(even) .timeline-card {
    margin-left: 50px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    /* Controlled by mobile menu toggle */
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    flex-direction: column;
    justify-content: center;
    gap: 2.5rem;
    padding: 3rem;
    transition: right 0.4s ease;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    z-index: 999;
  }

  [data-theme="light"] .nav-menu {
    background-color: rgba(255, 255, 255, 0.95);
  }

  .nav-menu.open {
    display: flex;
    right: 0;
  }

  .mobile-nav-toggle {
    display: block;
    z-index: 1000;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: center;
  }

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

  .hero-name {
    font-size: 3rem;
    letter-spacing: -1.5px;
  }

  .hero-subtitle {
    font-size: 1.5rem;
    min-height: 3rem;
  }

  .hero-desc {
    margin: 0 auto 2rem auto;
  }

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

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

  .portrait-frame {
    width: 290px;
    height: 330px;
  }

  .skills-grid,
  .projects-grid,
  .certs-grid,
  .achievements-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-container {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-name {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
    min-height: 2.5rem;
  }

  .section-title {
    font-size: 2rem;
    margin-bottom: 2.5rem;
  }

  .about-interests-grid {
    grid-template-columns: 1fr;
  }

  .about-intro-card {
    padding: 1.5rem;
  }

  .contact-form {
    padding: 1.5rem;
  }

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

  .resume-preview-card {
    padding: 1.5rem;
  }

  .resume-embed-container {
    height: 300px;
  }

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

/* ==========================================
18. VIDEO MODAL STYLING
========================================== */
.video-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.video-modal.active {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}

.video-modal-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(3, 3, 5, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.video-modal-content {
  position: relative;
  width: 92%;
  max-width: 880px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 1.25rem;
  box-shadow: var(--shadow-lg);
  transform: scale(0.92);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 2001;
}

.video-modal.active .video-modal-content {
  transform: scale(1);
}

.video-modal-close {
  position: absolute;
  top: -1.25rem;
  right: -1.25rem;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.video-modal-close:hover {
  background-color: #ef4444;
  border-color: #ef4444;
  color: #fff;
  transform: scale(1.1) rotate(90deg);
}

.video-player-wrapper {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 16px;
  overflow: hidden;
  background-color: #000;
  border: 1px solid var(--border-color);
}

#demo-video-player {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.video-modal-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  margin-top: 1rem;
  margin-left: 0.25rem;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .video-modal-close {
    top: 0.75rem;
    right: 0.75rem;
    background-color: rgba(0, 0, 0, 0.5);
    border-color: rgba(255, 255, 255, 0.2);
    color: #fff;
    z-index: 10;
  }

  .video-modal-content {
    padding: 0.5rem;
    border-radius: 16px;
  }

  .video-player-wrapper {
    border-radius: 12px;
  }
}