/* ============================
   CSS VARIABLES & RESET
   ============================ */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.3);
  --accent-secondary: #8b5cf6;
  --gradient: linear-gradient(135deg, #3b82f6, #8b5cf6);
  --gradient-text: linear-gradient(135deg, #60a5fa, #a78bfa);
  --border: rgba(148, 163, 184, 0.1);
  --border-hover: rgba(59, 130, 246, 0.4);
  --glass: rgba(15, 23, 42, 0.6);
  --glass-border: rgba(148, 163, 184, 0.08);
  --shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.15);
  --radius: 12px;
  --radius-lg: 20px;
  --nav-height: 72px;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-card-hover: rgba(241, 245, 249, 0.9);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --accent-glow: rgba(37, 99, 235, 0.2);
  --border: rgba(15, 23, 42, 0.08);
  --border-hover: rgba(37, 99, 235, 0.3);
  --glass: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(15, 23, 42, 0.06);
  --shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

a { color: var(--accent-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================
   GLASS CARD
   ============================ */
.glass-card {
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: var(--border-hover);
}

/* ============================
   NAVBAR
   ============================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}
.navbar.scrolled {
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 20px rgba(0,0,0,0.15);
  border-bottom: 1px solid var(--glass-border);
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
}
.logo-bracket { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 8px;
}
.nav-link {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  transition: all var(--transition);
  position: relative;
}
.nav-link:hover, .nav-link.active {
  color: var(--accent-light);
  background: var(--accent-glow);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.theme-toggle {
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.nav-cta {
  padding: 8px 20px;
  background: var(--gradient);
  color: #fff;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
}
.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); color: #fff; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  width: 24px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ============================
   BUTTONS
   ============================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 15px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px var(--accent-glow); color: #fff; }
.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--accent-light);
  border: 1px solid var(--accent);
}
.btn-outline:hover { background: var(--accent-glow); transform: translateY(-2px); color: var(--accent-light); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-full { width: 100%; justify-content: center; }

/* ============================
   HERO
   ============================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}
.hero-bg-effects {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}
.hero-orb-1 { width: 400px; height: 400px; background: var(--accent); top: -100px; right: -100px; }
.hero-orb-2 { width: 300px; height: 300px; background: var(--accent-secondary); bottom: -50px; left: -50px; animation-delay: 2s; }
.hero-orb-3 { width: 200px; height: 200px; background: #06b6d4; top: 50%; left: 30%; animation-delay: 4s; }
.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}
.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-greeting {
  font-size: 1.1rem;
  color: var(--accent-light);
  font-weight: 500;
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.greeting-wave {
  display: inline-block;
  animation: wave 2.5s infinite;
  transform-origin: 70% 70%;
}
@keyframes wave {
  0%, 60%, 100% { transform: rotate(0deg); }
  10%, 30% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  40% { transform: rotate(-4deg); }
  50% { transform: rotate(10deg); }
}
.hero-name {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
}
.name-line { display: block; }
.name-accent {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-tagline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}
.tagline-item { display: inline-flex; align-items: center; gap: 6px; }
.tagline-item i { color: var(--accent); font-size: 0.85rem; }
.tagline-divider { color: var(--text-muted); opacity: 0.5; }
.hero-location {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
  display: flex; align-items: center; gap: 6px;
}
.hero-location i { color: var(--accent); }
.hero-buttons { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.hero-socials { display: flex; gap: 12px; }
.social-link {
  width: 44px; height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition);
}
.social-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 4px 15px var(--accent-glow);
}

/* Code Window */
.code-window {
  background: #0d1117;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148,163,184,0.1);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  animation: slideUp 0.8s ease-out;
}
[data-theme="light"] .code-window { border-color: rgba(0,0,0,0.1); box-shadow: 0 20px 60px rgba(0,0,0,0.12); }
.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: #161b22;
  border-bottom: 1px solid rgba(148,163,184,0.08);
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot-red { background: #ff5f57; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #28c840; }
.code-title { margin-left: auto; font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); }
.code-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
  color: #c9d1d9;
  overflow-x: auto;
}
.code-keyword { color: #ff7b72; }
.code-class { color: #ffa657; }
.code-func { color: #d2a8ff; }
.code-param { color: #ffa657; }
.code-string { color: #a5d6ff; }
.code-comment { color: #8b949e; font-style: italic; }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  animation: bounce 2s infinite;
}
.scroll-mouse {
  width: 24px; height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  display: flex; justify-content: center; padding-top: 8px;
}
.scroll-wheel {
  width: 3px; height: 8px;
  background: var(--accent);
  border-radius: 3px;
  animation: scrollWheel 2s infinite;
}
@keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); } 40% { transform: translateX(-50%) translateY(-8px); } 60% { transform: translateX(-50%) translateY(-4px); } }
@keyframes scrollWheel { 0% { opacity: 1; transform: translateY(0); } 100% { opacity: 0; transform: translateY(8px); } }

/* ============================
   SECTIONS COMMON
   ============================ */
.section { padding: 100px 0; position: relative; }
.section-alt { background: var(--bg-secondary); }
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 12px;
}
.section-number {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  font-weight: 600;
}
.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
  margin-left: 16px;
  max-width: 300px;
}
.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 48px;
  text-align: center;
}

/* ============================
   ABOUT
   ============================ */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  margin-top: 40px;
}
.about-description {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 20px;
  line-height: 1.8;
}
.about-description strong { color: var(--accent-light); }
.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}
.highlight-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.highlight-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.highlight-icon {
  width: 44px; height: 44px;
  background: var(--accent-glow);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.highlight-number { display: block; font-size: 1.4rem; font-weight: 700; color: var(--text-primary); }
.highlight-label { font-size: 0.8rem; color: var(--text-muted); }
.about-info-cards { display: flex; flex-direction: column; gap: 14px; }
.info-card {
  display: flex; align-items: center; gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.info-card:hover { border-color: var(--accent); }
.info-card i { font-size: 1.3rem; color: var(--accent); width: 24px; text-align: center; }
.info-card strong { display: block; font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.info-card span { color: var(--text-primary); font-weight: 500; }

/* ============================
   EDUCATION (TIMELINE)
   ============================ */
.timeline { position: relative; margin-top: 48px; padding-left: 40px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 15px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-secondary));
  border-radius: 2px;
}
.timeline-item { position: relative; margin-bottom: 40px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker {
  position: absolute;
  left: -40px; top: 24px;
  width: 32px; height: 32px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 0.8rem;
  z-index: 2;
  box-shadow: 0 0 20px var(--accent-glow);
}
.timeline-content { padding: 28px; }
.timeline-content h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 6px; }
.timeline-badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--accent-glow);
  color: var(--accent-light);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.badge-secondary { background: rgba(139,92,246,0.15); color: #a78bfa; }
.timeline-degree { color: var(--text-secondary); font-size: 1rem; margin-bottom: 8px; }
.timeline-date { color: var(--text-muted); font-size: 0.9rem; display: flex; align-items: center; gap: 6px; margin-bottom: 16px; }
.timeline-date i { color: var(--accent); }
.timeline-gpa { display: flex; align-items: center; gap: 12px; }
.gpa-label { font-size: 0.85rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.gpa-bar { flex: 1; height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.gpa-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 4px;
  width: 0;
  transition: width 1.5s ease-out;
}
.gpa-value { font-weight: 700; color: var(--accent-light); font-family: var(--font-mono); font-size: 0.95rem; }
.timeline-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 4px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ============================
   SKILLS
   ============================ */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 40px;
}
.skills-grid > :last-child {
  grid-column: 1 / -1;
}
.skill-category { padding: 28px; }
.skill-category-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}
.skill-icon-wrap {
  width: 48px; height: 48px;
  background: var(--gradient);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 1.2rem;
}
.skill-category h3 { font-size: 1.15rem; font-weight: 700; }
.skill-badges { display: flex; flex-wrap: wrap; gap: 10px; }
.skill-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.skill-badge i { color: var(--accent); font-size: 0.9rem; }
.skill-badge:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--accent-glow);
}
.skill-badge.soft { border-color: rgba(139,92,246,0.2); }
.skill-badge.soft i { color: var(--accent-secondary); }
.skill-badge.soft:hover { border-color: var(--accent-secondary); color: #a78bfa; box-shadow: 0 4px 12px rgba(139,92,246,0.15); }

/* ============================
   PROJECTS
   ============================ */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 32px 0 40px;
}
.filter-btn {
  padding: 8px 22px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-main);
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent-light); }
.filter-btn.active {
  background: var(--gradient);
  color: #fff;
  border-color: transparent;
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.project-card {
  padding: 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover::before { opacity: 1; }
.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
}
.project-icon {
  width: 48px; height: 48px;
  background: var(--accent-glow);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 1.3rem;
}
.project-links { display: flex; gap: 10px; }
.project-link {
  color: var(--text-muted);
  font-size: 1.1rem;
  transition: all var(--transition);
}
.project-link:hover { color: var(--accent); transform: translateY(-2px); }
.project-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.project-desc { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; flex: 1; margin-bottom: 18px; }
.project-tech { display: flex; flex-wrap: wrap; gap: 8px; }
.project-tech span {
  padding: 4px 12px;
  background: var(--bg-primary);
  border-radius: 6px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--accent-light);
  font-weight: 500;
}
.project-card.hidden {
  display: none;
}

/* ============================
   CERTIFICATES
   ============================ */
.certificates-grid { margin-top: 40px; max-width: 800px; }
.certificate-card {
  display: flex;
  gap: 24px;
  padding: 32px;
}
.cert-icon {
  width: 64px; height: 64px;
  background: var(--gradient);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 1.6rem;
  flex-shrink: 0;
}
.cert-content h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 6px; }
.cert-issuer {
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex; align-items: center; gap: 6px;
  margin-bottom: 12px;
}
.cert-issuer i { color: var(--accent); }
.cert-desc { color: var(--text-secondary); font-size: 0.93rem; margin-bottom: 14px; line-height: 1.7; }
.cert-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.cert-tags span {
  padding: 4px 12px;
  background: var(--accent-glow);
  border-radius: 6px;
  font-size: 0.78rem;
  color: var(--accent-light);
  font-weight: 500;
}

/* ============================
   CONTACT
   ============================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  margin-top: 40px;
}
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-item {
  display: flex; align-items: center; gap: 16px;
  padding: 20px;
}
.contact-icon {
  width: 48px; height: 48px;
  background: var(--accent-glow);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-item strong { display: block; font-size: 0.82rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.contact-item a { color: var(--text-primary); font-weight: 500; }
.contact-item a:hover { color: var(--accent); }
.contact-form { padding: 32px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-main);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-status {
  margin-top: 16px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 500;
}
.form-status.success { color: #10b981; }
.form-status.error { color: #ef4444; }

/* ============================
   FOOTER
   ============================ */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
}
.footer-content { text-align: center; }
.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  display: block;
}
.footer-socials {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
}
.footer-socials a {
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.footer-socials a:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-3px); }
.footer-text { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 8px; }
.footer-text strong { color: var(--accent-light); }
.footer-copyright { color: var(--text-muted); font-size: 0.82rem; }

/* ============================
   BACK TO TOP
   ============================ */
.back-to-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  background: var(--gradient);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  box-shadow: 0 4px 15px var(--accent-glow);
  z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 8px 25px var(--accent-glow); }

/* ============================
   SCROLL ANIMATIONS
   ============================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}
.fade-in-left.visible { opacity: 1; transform: translateX(0); }
.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}
.fade-in-right.visible { opacity: 1; transform: translateX(0); }

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .skills-grid > :last-child { grid-column: auto; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid var(--glass-border);
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 12px 16px; width: 100%; }
  .hamburger { display: flex; }
  .nav-cta { display: none; }
  .hero-name { font-size: 2.2rem; }
  .hero-tagline { flex-direction: column; gap: 6px; }
  .tagline-divider { display: none; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: 100%; justify-content: center; }
  .section { padding: 70px 0; }
  .about-highlights { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .certificate-card { flex-direction: column; align-items: flex-start; }
  .timeline { padding-left: 32px; }
  .timeline-marker { left: -32px; width: 28px; height: 28px; font-size: 0.7rem; }
  .timeline::before { left: 12px; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .about-highlights { grid-template-columns: 1fr; }
  .highlight-card { padding: 14px; }
  .project-card { padding: 20px; }
  .contact-form { padding: 20px; }
  .timeline-content { padding: 20px; }
  .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; }
}