/* =============================================
   CSS Custom Properties & Reset
   ============================================= */
:root {
  --bg: #0a0a0f;
  --bg-alt: #0f0f1a;
  --surface: #13131f;
  --surface-2: #1a1a2e;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.18);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #475569;
  --accent: #7c3aed;
  --accent-2: #6d28d9;
  --accent-glow: rgba(124, 58, 237, 0.35);
  --accent-soft: rgba(124, 58, 237, 0.12);
  --cyan: #06b6d4;
  --cyan-soft: rgba(6, 182, 212, 0.12);
  --gradient: linear-gradient(135deg, #7c3aed, #06b6d4);
  --gradient-text: linear-gradient(135deg, #a78bfa, #67e8f9);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.5);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 40px var(--accent-glow);
  --radius: 12px;
  --radius-lg: 20px;
  --nav-h: 68px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --surface: #ffffff;
  --surface-2: #f0f4ff;
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.16);
  --text: #1e293b;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --accent-glow: rgba(124, 58, 237, 0.2);
  --accent-soft: rgba(124, 58, 237, 0.08);
  --cyan-soft: rgba(6, 182, 212, 0.08);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.12);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
}

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

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }

/* =============================================
   Scrollbar
   ============================================= */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 99px; }

/* =============================================
   Cursor Glow
   ============================================= */
.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,0.08) 0%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 0;
  transition: opacity 0.3s;
}

/* =============================================
   Particle Canvas
   ============================================= */
#particleCanvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* =============================================
   Navigation
   ============================================= */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 0 2rem;
  gap: 2rem;
  z-index: 1000;
  transition: background var(--transition), backdrop-filter var(--transition), box-shadow var(--transition);
}

#navbar.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}

[data-theme="light"] #navbar.scrolled {
  background: rgba(248, 250, 252, 0.85);
}

.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.2rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-right: auto;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}

.nav-link {
  padding: 0.5rem 0.9rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%; right: 50%;
  height: 2px;
  background: var(--accent);
  border-radius: 99px;
  transition: left var(--transition), right var(--transition);
}

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

.nav-link:hover::after, .nav-link.active::after {
  left: 0.9rem; right: 0.9rem;
}

.theme-toggle {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  color: var(--text-muted);
  transition: all var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 99px;
  transition: transform var(--transition), opacity var(--transition);
}

/* =============================================
   Mobile Menu
   ============================================= */
.mobile-menu {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem 2rem;
  z-index: 999;
  transform: translateY(-110%);
  transition: transform var(--transition);
  backdrop-filter: blur(20px);
}

.mobile-menu.open {
  transform: translateY(0);
}

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-link {
  display: block;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
}

.mobile-link:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

/* =============================================
   Hero
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(var(--nav-h) + 2rem) 6vw 4rem;
  gap: 4rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%; left: -10%;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: var(--accent-soft);
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 500;
  color: #a78bfa;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.6s ease forwards;
}

.hero-badge::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #4ade80;
  animation: pulse-green 2s ease infinite;
}

@keyframes pulse-green {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  min-height: 1.2em;
  animation: fadeInUp 0.6s 0.1s ease both;
}

.cursor-blink {
  -webkit-text-fill-color: var(--accent);
  animation: blink 0.8s step-end infinite;
}

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

.hero-title {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 0.75rem;
  animation: fadeInUp 0.6s 0.2s ease both;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-dim);
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.6s 0.3s ease both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
  animation: fadeInUp 0.6s 0.4s ease both;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  animation: fadeInUp 0.6s 0.5s ease both;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
}

/* Avatar ring */
.hero-visual {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  animation: fadeInUp 0.6s 0.3s ease both;
}

.avatar-ring {
  position: relative;
  width: 280px; height: 280px;
  display: flex; align-items: center; justify-content: center;
}

.avatar-ring-inner {
  width: 160px; height: 160px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 60px var(--accent-glow), 0 0 120px rgba(6,182,212,0.15);
}

.avatar-initials {
  font-size: 2.8rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: white;
  letter-spacing: 4px;
}

.orbit-ring {
  position: absolute;
  inset: 0;
  color: var(--accent);
  opacity: 0.3;
  animation: spin 20s linear infinite;
}

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

.orbit-dot {
  position: absolute;
  width: 12px; height: 12px;
  border-radius: 50%;
}

.orbit-dot-1 {
  top: 10px; left: 50%; transform: translateX(-50%);
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: orbit1 6s linear infinite;
}

.orbit-dot-2 {
  bottom: 10px; left: 50%; transform: translateX(-50%);
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: orbit1 6s linear infinite reverse;
}

.orbit-dot-3 {
  left: 10px; top: 50%; transform: translateY(-50%);
  background: #f59e0b;
  box-shadow: 0 0 10px #f59e0b;
  animation: orbit2 9s linear infinite;
}

@keyframes orbit1 {
  from { transform: translateX(-50%) rotate(0deg) translateX(130px) rotate(0deg); }
  to { transform: translateX(-50%) rotate(360deg) translateX(130px) rotate(-360deg); }
}

@keyframes orbit2 {
  from { transform: translateY(-50%) rotate(0deg) translateY(130px) rotate(0deg); }
  to { transform: translateY(-50%) rotate(360deg) translateY(130px) rotate(-360deg); }
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-dim);
  animation: fadeInUp 1s 1s ease both;
}

.scroll-arrow {
  width: 20px; height: 30px;
  border: 2px solid var(--border);
  border-radius: 10px;
  position: relative;
}

.scroll-arrow::after {
  content: '';
  position: absolute;
  top: 5px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 8px;
  background: var(--accent);
  border-radius: 99px;
  animation: scrollBounce 1.5s ease infinite;
}

@keyframes scrollBounce {
  0% { top: 5px; opacity: 1; }
  100% { top: 14px; opacity: 0; }
}

/* =============================================
   Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  opacity: 0;
  transition: opacity var(--transition);
}

.btn:hover::before { opacity: 0.06; }

.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

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

.btn-outline {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--border-hover);
  color: var(--text);
  transform: translateY(-2px);
}

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

/* =============================================
   Sections
   ============================================= */
.section {
  padding: 7rem 0;
  position: relative;
}

.section-alt { background: var(--bg-alt); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

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

.section-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
}

.section-subtitle {
  color: var(--text-muted);
  margin-top: 0.75rem;
  font-size: 1.05rem;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

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

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  line-height: 1.8;
}

.about-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 2rem;
}

.fact-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.875rem;
  transition: border-color var(--transition);
}

.fact-item:hover { border-color: var(--accent); }

.fact-icon { font-size: 1rem; }

/* Code block */
.code-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.code-filename {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 0.5rem;
}

.code-content {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.9;
  padding: 1.5rem;
  white-space: pre-wrap;
}

.json-key { color: #93c5fd; }
.json-string { color: #86efac; }
.json-bool { color: #f97316; }
.json-brace { color: var(--text-muted); }

/* =============================================
   Skills
   ============================================= */
.skills-tabs {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.55rem 1.25rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.tab-btn.active, .tab-btn:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.skill-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

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

.skill-icon { font-size: 1.5rem; flex-shrink: 0; }

.skill-info {
  flex: 1;
  min-width: 0;
}

.skill-name {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.skill-bar {
  height: 4px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 99px;
  width: 0%;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-pct {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  flex-shrink: 0;
}

/* =============================================
   Timeline
   ============================================= */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--cyan), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline-dot {
  position: absolute;
  left: -2.6rem;
  top: 1.25rem;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
  box-shadow: 0 0 12px var(--accent-glow);
}

.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
}

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

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.timeline-role {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.timeline-company {
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 500;
}

.timeline-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-dim);
  padding: 0.3rem 0.75rem;
  background: var(--surface-2);
  border-radius: 6px;
  white-space: nowrap;
}

.timeline-bullets {
  list-style: none;
  margin-bottom: 1.25rem;
}

.timeline-bullets li {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0.35rem 0 0.35rem 1.25rem;
  position: relative;
  line-height: 1.6;
}

.timeline-bullets li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* =============================================
   Tags
   ============================================= */
.tag {
  padding: 0.25rem 0.65rem;
  background: var(--accent-soft);
  color: #a78bfa;
  border-radius: 6px;
  font-size: 0.775rem;
  font-weight: 500;
  border: 1px solid rgba(124,58,237,0.2);
}

/* =============================================
   Projects
   ============================================= */
.projects-filter {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.filter-btn.active, .filter-btn:hover {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border-hover);
}

.filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
}

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

.project-card.hidden { display: none; }

.project-badge {
  position: absolute;
  top: 1rem; right: 1rem;
  z-index: 2;
  background: var(--gradient);
  color: white;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.project-img {
  position: relative;
  height: 180px;
  overflow: hidden;
}

.project-img-placeholder {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  transition: transform var(--transition);
}

.project-card:hover .project-img-placeholder { transform: scale(1.05); }

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  opacity: 0;
  transition: opacity var(--transition);
  backdrop-filter: blur(4px);
}

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

.project-link {
  padding: 0.5rem 1rem;
  background: white;
  color: #111;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.825rem;
  transition: transform var(--transition);
}

.project-link:hover { transform: scale(1.05); }

.project-body { padding: 1.25rem; }

.project-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.project-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

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

/* =============================================
   Education
   ============================================= */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.edu-card {
  display: flex;
  gap: 1.25rem;
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

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

.edu-icon { font-size: 2rem; flex-shrink: 0; }

.edu-degree {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.edu-school {
  display: block;
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.2rem;
}

.edu-date {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.edu-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* =============================================
   Contact
   ============================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: start;
}

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

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.contact-item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

.contact-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}

.contact-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  transition: color var(--transition);
}

.contact-value:hover { color: var(--accent); }

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

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

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

.form-group label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  transition: all var(--transition);
  outline: none;
  resize: vertical;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-success {
  display: none;
  padding: 0.75rem 1rem;
  background: rgba(34,197,94,0.12);
  border: 1px solid rgba(34,197,94,0.3);
  border-radius: 10px;
  color: #4ade80;
  font-size: 0.875rem;
  text-align: center;
}

/* =============================================
   Footer
   ============================================= */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.1rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-copy {
  font-size: 0.875rem;
  color: var(--text-dim);
}

.footer-socials {
  display: flex;
  gap: 0.75rem;
}

.social-link {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
}

.social-link:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

/* =============================================
   Back to Top
   ============================================= */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--gradient);
  color: white;
  font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px var(--accent-glow);
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 500;
  pointer-events: none;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

/* =============================================
   Animations
   ============================================= */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 900px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: calc(var(--nav-h) + 3rem);
  }

  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-facts { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .form-row { grid-template-columns: 1fr; }
  .timeline { padding-left: 1.25rem; }
  .timeline-dot { left: -1.85rem; }
  .scroll-indicator { display: none; }
}

@media (max-width: 480px) {
  .hero-stats { gap: 1.5rem; }
  .avatar-ring { width: 200px; height: 200px; }
  .avatar-ring-inner { width: 120px; height: 120px; }
  .avatar-initials { font-size: 2rem; }
}