/* ============================================================
   style.css – Mohd Shami Portfolio
   White | Blue | Black – Professional 3D Aesthetic
   ============================================================ */

/* ── CSS Custom Properties (Design Tokens) ── */
:root {
  /* Colors – Dark mode (Black & Blue) */
  --bg-primary: #03060d;
  --bg-secondary: #070c18;
  --bg-tertiary: #0a1020;
  --bg-card: rgba(15, 25, 50, 0.6);
  --bg-card-hover: rgba(20, 40, 80, 0.7);
  --border-color: rgba(59, 130, 246, 0.15);
  --border-hover: rgba(59, 130, 246, 0.35);
  --text-primary: #f0f4ff;
  --text-secondary: #94a8c8;
  --text-muted: #4a6080;

  /* Blue Accent Palette */
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-800: #1e40af;
  --blue-900: #1e3a8a;

  /* Primary accents */
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-dark: #1d4ed8;
  --accent-glow: rgba(59, 130, 246, 0.25);
  --accent-glow-strong: rgba(59, 130, 246, 0.4);
  --white: #ffffff;
  --white-glow: rgba(255, 255, 255, 0.08);

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #03060d 0%, #070c18 40%, #0a1530 100%);
  --gradient-accent: linear-gradient(135deg, var(--blue-500), var(--blue-400), var(--blue-300));
  --gradient-accent-subtle: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  --gradient-card: linear-gradient(135deg, rgba(15, 30, 60, 0.5), rgba(10, 20, 45, 0.4));
  --gradient-mesh: radial-gradient(at 20% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
                   radial-gradient(at 80% 20%, rgba(29, 78, 216, 0.06) 0%, transparent 50%),
                   radial-gradient(at 50% 50%, rgba(96, 165, 250, 0.03) 0%, transparent 70%);

  /* Typography */
  --font-main: 'Outfit', sans-serif;
  --font-mono: 'Fira Code', monospace;

  /* Sizes */
  --nav-h: 70px;
  --border-radius: 16px;
  --border-radius-lg: 24px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* 3D */
  --perspective: 1200px;
  --card-depth: 20px;
}

/* Light mode – White & Blue */
[data-theme="light"] {
  --bg-primary: #f8faff;
  --bg-secondary: #eef3ff;
  --bg-tertiary: #e4ecff;
  --bg-card: rgba(255, 255, 255, 0.7);
  --bg-card-hover: rgba(255, 255, 255, 0.9);
  --border-color: rgba(59, 130, 246, 0.12);
  --border-hover: rgba(59, 130, 246, 0.3);
  --text-primary: #0a1628;
  --text-secondary: #3a5070;
  --text-muted: #6a8aaf;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --accent-glow-strong: rgba(59, 130, 246, 0.25);
  --white-glow: rgba(0, 0, 0, 0.03);
  --gradient-hero: linear-gradient(135deg, #f0f5ff 0%, #e0eaff 50%, #dce8ff 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(240, 245, 255, 0.6));
  --gradient-mesh: radial-gradient(at 20% 80%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
                   radial-gradient(at 80% 20%, rgba(29, 78, 216, 0.04) 0%, transparent 50%);
}

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

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

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  cursor: none;
  transition: background var(--transition), color var(--transition);
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { border: none; cursor: pointer; font-family: var(--font-main); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ============================================================
   CURSOR GLOW
   ============================================================ */
#cursor-glow {
  position: fixed;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 9999;
  transition: opacity 0.3s;
}
#cursor-dot {
  position: fixed;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-light);
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 10000;
  box-shadow: 0 0 12px var(--accent), 0 0 24px var(--accent-glow);
  transition: transform 0.1s;
}

/* ============================================================
   PRELOADER
   ============================================================ */
#preloader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  transition: opacity 0.6s, visibility 0.6s;
}
#preloader.hidden { opacity: 0; visibility: hidden; }

.preloader-inner { text-align: center; }

.preloader-logo {
  font-size: 4rem;
  font-weight: 900;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
  animation: pulse 1.5s ease-in-out infinite;
  text-shadow: 0 0 40px var(--accent-glow);
}

.preloader-bar {
  width: 220px;
  height: 4px;
  background: var(--border-color);
  border-radius: 2px;
  margin: 0 auto 1rem;
  overflow: hidden;
}
.preloader-fill {
  height: 100%;
  width: 0%;
  background: var(--gradient-accent);
  border-radius: 2px;
  animation: loading 2s ease-in-out forwards;
}
.preloader-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  letter-spacing: 2px;
  font-family: var(--font-mono);
}

@keyframes loading {
  0% { width: 0%; }
  100% { width: 100%; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(0.95); }
}

/* ============================================================
   NAVIGATION
   ============================================================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 2rem;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: all var(--transition);
}
#navbar.scrolled {
  background: rgba(3, 6, 13, 0.92);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 40px rgba(59, 130, 246, 0.06);
}
[data-theme="light"] #navbar.scrolled {
  background: rgba(248, 250, 255, 0.92);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
}

.nav-logo {
  font-size: 1.8rem;
  font-weight: 900;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}
.nav-links a {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 1px;
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 60%; }
.nav-links a.active { color: var(--accent-light); }
.nav-links a.active::after { width: 60%; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
#theme-toggle:hover { background: var(--accent-glow); border-color: var(--accent); }

.btn-resume {
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  background: var(--gradient-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  transition: all var(--transition);
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-resume:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow-strong); }

#hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  background: transparent;
  padding: 4px;
}
#hamburger span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}
#hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
#hamburger.open span:nth-child(2) { opacity: 0; }
#hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ============================================================
   SECTIONS SHARED
   ============================================================ */
.section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  pointer-events: none;
}
.section-alt { background: var(--bg-secondary); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

.section-title {
  text-align: center;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
  position: relative;
}
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 3.5rem;
}

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

/* Glass card utility – enhanced 3D */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: all var(--transition);
}
.glass:hover {
  border-color: var(--border-hover);
}

/* 3D Card base */
.card-3d {
  perspective: var(--perspective);
  transform-style: preserve-3d;
}
.card-3d-inner {
  transform-style: preserve-3d;
  transition: transform var(--transition-slow);
}
.card-3d:hover .card-3d-inner {
  transform: translateZ(var(--card-depth));
}

/* Generic tags */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  background: var(--accent-glow);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--accent-light);
  font-weight: 500;
  transition: all var(--transition);
}
.tag:hover {
  background: rgba(59, 130, 246, 0.2);
  transform: translateY(-1px);
}

/* ── Buttons ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 2rem;
  border-radius: 10px;
  background: var(--gradient-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--transition);
  box-shadow: 0 4px 20px var(--accent-glow);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 8px 40px var(--accent-glow-strong); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 2rem;
  border-radius: 10px;
  background: transparent;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.95rem;
  border: 1.5px solid var(--border-color);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.btn-outline::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-glow);
  opacity: 0;
  transition: opacity var(--transition);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent-light); transform: translateY(-3px); }
.btn-outline:hover::before { opacity: 0.3; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: 8px;
  background: var(--accent-glow);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--accent-light);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-ghost:hover { background: rgba(59, 130, 246, 0.2); transform: translateY(-2px); }

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

/* ============================================================
   HERO SECTION
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  overflow: hidden;
}

/* Decorative floating orbs */
#hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
  top: -200px;
  right: -200px;
  animation: floatOrb 8s ease-in-out infinite;
  pointer-events: none;
}
#hero::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(29, 78, 216, 0.1) 0%, transparent 70%);
  bottom: -100px;
  left: -100px;
  animation: floatOrb 10s ease-in-out infinite reverse;
  pointer-events: none;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 900px;
  padding: 0 2rem;
  margin-top: var(--nav-h);
}

/* 3D Badge replacing the photo */
.hero-3d-badge {
  width: 140px;
  height: 140px;
  border-radius: 28px;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
  position: relative;
  transform: perspective(600px) rotateX(5deg) rotateY(-5deg);
  transition: transform var(--transition-slow);
  animation: badgeFloat 4s ease-in-out infinite;
  box-shadow: 0 20px 60px rgba(59, 130, 246, 0.15),
              0 0 0 1px rgba(59, 130, 246, 0.1),
              inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.hero-3d-badge:hover {
  transform: perspective(600px) rotateX(0deg) rotateY(0deg) scale(1.05);
}
.hero-3d-badge i {
  font-size: 3.5rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 15px var(--accent-glow));
}
.hero-3d-badge::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 30px;
  background: var(--gradient-accent);
  z-index: -1;
  opacity: 0.3;
  filter: blur(10px);
  animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgeFloat {
  0%, 100% { transform: perspective(600px) rotateX(5deg) rotateY(-5deg) translateY(0); }
  50% { transform: perspective(600px) rotateX(-3deg) rotateY(3deg) translateY(-10px); }
}
@keyframes badgePulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.5; }
}

/* Hero text */
.hero-text { flex: 1; }
.hero-greeting {
  font-size: 1.15rem;
  color: var(--accent-light);
  font-family: var(--font-mono);
  margin-bottom: 0.5rem;
  letter-spacing: 1px;
}
.hero-name {
  font-size: clamp(2.8rem, 6vw, 4.8rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #ffffff 0%, var(--blue-300) 50%, var(--blue-500) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}
[data-theme="light"] .hero-name {
  background: linear-gradient(135deg, #0a1628 0%, var(--blue-700) 50%, var(--blue-500) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}
.hero-tagline {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem;
}
.typing-prefix { color: var(--text-secondary); }
.typed-text { color: var(--accent-light); font-weight: 700; font-family: var(--font-mono); min-width: 2px; }
.typed-cursor {
  display: inline-block;
  color: var(--accent-light);
  animation: blink 1s step-end infinite;
  font-weight: 100;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.hero-desc { color: var(--text-secondary); font-size: 1.05rem; max-width: 520px; margin: 0 auto 2rem; }

.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-bottom: 2rem; }

.hero-socials { display: flex; gap: 1rem; justify-content: center; }
.hero-socials a {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.hero-socials a::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition);
}
.hero-socials a:hover {
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: 0 8px 25px var(--accent-glow);
}
.hero-socials a:hover::before { opacity: 0.15; }
.hero-socials a i { position: relative; z-index: 1; }

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
  font-family: var(--font-mono);
  z-index: 2;
}
.scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, var(--blue-500), var(--blue-300), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; opacity: 1; }
  50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
  51% { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ============================================================
   STATS BAR (new – between hero and about)
   ============================================================ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: -50px;
  position: relative;
  z-index: 3;
  padding: 0 2rem;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}
.stat-card {
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: var(--border-radius);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transform: perspective(800px) rotateX(2deg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0.6;
}
.stat-card:hover {
  transform: perspective(800px) rotateX(0deg) translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 20px 50px var(--accent-glow);
}
.stat-number {
  font-size: 2.2rem;
  font-weight: 900;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: 0.3rem;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.about-card {
  padding: 2.5rem;
  background: var(--gradient-card);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  transform: perspective(1000px) rotateY(-1deg);
}
.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0.5;
}
.about-card:hover {
  transform: perspective(1000px) rotateY(0deg) translateY(-4px);
  box-shadow: 0 25px 60px rgba(59, 130, 246, 0.12);
  border-color: var(--border-hover);
}

.about-intro { margin-bottom: 1.25rem; color: var(--text-secondary); font-size: 1.05rem; }
.about-intro strong { color: var(--text-primary); }
.about-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.5rem; }

.about-skills-wrap {
  padding: 2.5rem;
  border-radius: var(--border-radius);
  transform: perspective(1000px) rotateY(1deg);
  transition: transform var(--transition);
}
.about-skills-wrap:hover {
  transform: perspective(1000px) rotateY(0deg);
}
.about-skills-title { font-size: 1.3rem; font-weight: 700; margin-bottom: 1.5rem; }

.skill-chips { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.2rem;
  border-radius: 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: var(--text-primary);
  transition: all var(--transition);
  font-weight: 500;
  position: relative;
  overflow: hidden;
}
.chip::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition);
}
.chip i { color: var(--accent-light); font-size: 0.9rem; position: relative; z-index: 1; }
.chip span, .chip { position: relative; z-index: 1; }
.chip:hover {
  border-color: var(--accent);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 25px var(--accent-glow);
}
.chip:hover::before { opacity: 0.08; }

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

.project-card {
  overflow: hidden;
  background: var(--gradient-card);
  transition: all var(--transition-slow);
  position: relative;
  transform: perspective(1000px) rotateX(1deg) rotateY(0deg);
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 2;
}
.project-card:hover {
  transform: perspective(1000px) rotateX(0deg) translateY(-10px);
  box-shadow: 0 30px 80px rgba(59, 130, 246, 0.15);
  border-color: var(--border-hover);
}
.project-card:hover::before { opacity: 0.7; }

.project-img-wrap { position: relative; overflow: hidden; }
.project-img { width: 100%; height: 200px; object-fit: cover; transition: transform var(--transition-slow); }
.project-card:hover .project-img { transform: scale(1.08); }

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(3, 6, 13, 0.7), rgba(29, 78, 216, 0.3));
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover .project-overlay { opacity: 1; }
.overlay-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8) translateY(10px);
  transition: all var(--transition);
  box-shadow: 0 8px 30px var(--accent-glow);
}
.project-card:hover .overlay-icon { transform: scale(1) translateY(0); }

.project-body { padding: 1.5rem; }
.project-tag { font-size: 0.75rem; font-family: var(--font-mono); color: var(--accent-light); letter-spacing: 0.5px; }
.project-title { font-size: 1.25rem; font-weight: 700; margin: 0.5rem 0; }
.project-desc { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1.25rem; line-height: 1.6; }

/* ============================================================
   TIMELINE (Work Experience)
   ============================================================ */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-top: 1rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--blue-600), var(--blue-400), var(--blue-300));
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 2.5rem 2.5rem 0;
}
.timeline-item:nth-child(even) { margin-left: 50%; padding: 0 0 2.5rem 2.5rem; }

.timeline-dot {
  position: absolute;
  right: -10px;
  top: 12px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 15px var(--accent-glow), 0 0 30px var(--accent-glow);
  z-index: 1;
  animation: dotPulse 2s ease-in-out infinite;
}
.timeline-item:nth-child(even) .timeline-dot { right: auto; left: -10px; }

@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 15px var(--accent-glow), 0 0 30px var(--accent-glow); }
  50% { box-shadow: 0 0 20px var(--accent-glow-strong), 0 0 40px var(--accent-glow); }
}

.timeline-content {
  padding: 1.5rem;
  transition: all var(--transition);
  transform: perspective(800px) rotateY(0deg);
}
.timeline-content:hover {
  transform: perspective(800px) translateY(-4px);
  box-shadow: 0 20px 60px rgba(59, 130, 246, 0.12);
  border-color: var(--border-hover);
}
.timeline-date { font-size: 0.8rem; font-family: var(--font-mono); color: var(--accent-light); letter-spacing: 1px; }
.timeline-content h3 { font-size: 1.2rem; font-weight: 700; margin: 0.5rem 0 0.25rem; }
.company { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0.75rem; }
.company i { margin-right: 0.4rem; }
.timeline-content p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1rem; }
.timeline-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* ============================================================
   CERTIFICATES
   ============================================================ */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}

.cert-card {
  overflow: hidden;
  transition: all var(--transition-slow);
  background: var(--gradient-card);
  transform: perspective(1000px) rotateX(1deg);
}
.cert-card:hover {
  transform: perspective(1000px) rotateX(0deg) translateY(-8px) scale(1.02);
  box-shadow: 0 30px 80px rgba(59, 130, 246, 0.15);
  border-color: var(--border-hover);
}

.cert-img-wrap { position: relative; overflow: hidden; }
.cert-img { width: 100%; height: 180px; object-fit: cover; transition: transform 0.5s ease; }
.cert-card:hover .cert-img { transform: scale(1.1); }

.cert-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.cert-body { padding: 1.25rem; }
.cert-body h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.cert-body p { color: var(--text-secondary); font-size: 0.875rem; line-height: 1.6; }

/* ============================================================
   SKILLS
   ============================================================ */
.skills-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.skills-cat {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Progress bars */
.skill-bar-group { margin-bottom: 1.5rem; }
.skill-bar-label { display: flex; justify-content: space-between; margin-bottom: 0.5rem; font-size: 0.9rem; font-weight: 600; }
.skill-bar-label .pct { color: var(--text-secondary); font-family: var(--font-mono); }
.skill-bar-track {
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}
.skill-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--gradient-accent);
  border-radius: 4px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 12px var(--accent-glow);
  position: relative;
}
.skill-bar-fill::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 30px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3));
  border-radius: 4px;
}

/* Ring charts */
.circles-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.circle-stat {
  text-align: center;
  position: relative;
  padding: 1rem;
  border-radius: var(--border-radius);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: all var(--transition);
}
.circle-stat:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 12px 40px var(--accent-glow);
}

.ring-svg { width: 100%; max-width: 120px; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--border-color); stroke-width: 8; }
.ring-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 314;
  stroke-dashoffset: 314;
  transition: stroke-dashoffset 1.4s cubic-bezier(0.4, 0, 0.2, 1);
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

.circle-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.4;
}
.circle-label strong { display: block; font-size: 1rem; font-weight: 700; color: var(--text-primary); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.contact-form {
  padding: 2.5rem;
  transform: perspective(1000px) rotateY(-1deg);
  transition: transform var(--transition);
}
.contact-form:hover {
  transform: perspective(1000px) rotateY(0deg);
}
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 0.5rem; color: var(--text-secondary); }
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.95rem;
  transition: all var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow), 0 0 40px rgba(59, 130, 246, 0.08);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.form-success {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid var(--accent);
  color: var(--accent-light);
  font-size: 0.875rem;
  display: none;
}
.form-success.show { display: block; }

.contact-info { display: flex; flex-direction: column; gap: 1rem; }
.contact-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  transition: all var(--transition);
  transform: perspective(800px) rotateY(1deg);
}
.contact-card:hover {
  transform: perspective(800px) rotateY(0deg) translateX(6px);
  border-color: var(--accent);
  box-shadow: 0 8px 30px var(--accent-glow);
}
.contact-icon { font-size: 1.5rem; background: var(--gradient-accent); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; flex-shrink: 0; }
.contact-card h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 0.2rem; }
.contact-card a { color: var(--text-primary); font-size: 0.95rem; transition: color var(--transition); }
.contact-card a:hover { color: var(--accent-light); }

.contact-socials { display: flex; gap: 0.75rem; margin-top: 0.5rem; }
.social-btn {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.social-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition);
}
.social-btn:hover {
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: 0 8px 30px var(--accent-glow);
}
.social-btn:hover::before { opacity: 0.15; }
.social-btn i { position: relative; z-index: 1; }

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  text-align: center;
  padding: 2.5rem 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  position: relative;
}
#footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-accent);
  opacity: 0.3;
}
.footer-sub { margin-top: 0.3rem; font-size: 0.8rem; }
.heart { color: var(--accent-light); animation: heartbeat 1.5s ease-in-out infinite; display: inline-block; }
@keyframes heartbeat { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.3); } }

/* ============================================================
   BACK TO TOP
   ============================================================ */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 25px var(--accent-glow);
  transition: all var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 900;
}
#back-to-top.visible { opacity: 1; pointer-events: all; }
#back-to-top:hover { transform: translateY(-4px); box-shadow: 0 12px 40px var(--accent-glow-strong); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; }
  .skills-layout { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  /* Nav */
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(3, 6, 13, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 1.5rem;
    gap: 0.5rem;
    transform: translateY(-120%);
    transition: transform var(--transition);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
  }
  [data-theme="light"] .nav-links {
    background: rgba(248, 250, 255, 0.97);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 0.75rem 1rem; font-size: 1.1rem; }
  #hamburger { display: flex; }
  .btn-resume { display: none; }

  /* Hero */
  .hero-content {
    text-align: center;
    gap: 2rem;
    padding-top: 2rem;
  }
  .hero-cta { justify-content: center; }
  .hero-socials { justify-content: center; }
  .hero-desc { margin: 0 auto 2rem; }
  .hero-tagline { justify-content: center; }
  .hero-3d-badge { width: 110px; height: 110px; }

  /* Timeline */
  .timeline::before { left: 2px; }
  .timeline-item { width: 100%; padding: 0 0 2rem 2.5rem; }
  .timeline-item:nth-child(even) { margin-left: 0; padding: 0 0 2rem 2.5rem; }
  .timeline-dot { left: -8px; right: auto; }
  .timeline-item:nth-child(even) .timeline-dot { left: -8px; }

  /* Remove 3D transforms on mobile for performance */
  .about-card,
  .about-skills-wrap,
  .project-card,
  .cert-card,
  .contact-form,
  .contact-card,
  .stat-card { transform: none !important; }
}

@media (max-width: 540px) {
  .hero-name { font-size: 2.5rem; }
  .hero-3d-badge { width: 100px; height: 100px; }
  .hero-3d-badge i { font-size: 2.5rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .circles-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 70px 0; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: -30px; }
  .stat-card { padding: 1.5rem 1rem; }
  .stat-number { font-size: 1.8rem; }
}