/* ══════════════════════════════════════════════════════════════
   HIGH-TECH / DASHBOARD AESTHETIC — DESIGN SYSTEM
══════════════════════════════════════════════════════════════ */
:root {
  /* Core Colors */
  --bg-core: #050505;
  --bg-surface: #0a0a0a;
  --bg-panel: rgba(15, 15, 15, 0.7);
  --bg-panel-hover: rgba(25, 25, 25, 0.85);

  /* Borders & Dividers */
  --border-dim: rgba(255, 255, 255, 0.05);
  --border-active: rgba(255, 255, 255, 0.15);
  
  /* Typography Colors */
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #52525b;

  /* Data Accents */
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-purple: #8b5cf6;
  --accent-amber: #f59e0b;

  /* Fonts */
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Metrics & Layout */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --space-section: 6rem 10%;
  --bg-mobile-menu: rgba(8, 8, 8, 0.97);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background-color: var(--bg-core);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-core); }
::-webkit-scrollbar-thumb { background: var(--border-active); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ══════════════════════════════════════════════════════════════
   BACKGROUND SYSTEM
══════════════════════════════════════════════════════════════ */
#three-canvas {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100vh;
  z-index: -2;
  pointer-events: none;
}

.noise-overlay {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.02'/%3E%3C/svg%3E");
}

.grid-overlay {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image: 
    linear-gradient(to right, rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}

/* ══════════════════════════════════════════════════════════════
   NAVIGATION (TERMINAL HEADER)
══════════════════════════════════════════════════════════════ */
.nav {
  position: fixed; top: 0; width: 100%; z-index: 100;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem;
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dim);
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex; align-items: center; gap: 8px;
}
.nav-brand::before {
  content: ''; display: inline-block; width: 8px; height: 8px;
  background: var(--accent-emerald); border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
}

.nav-links {
  display: flex; gap: 2rem;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 0.2s;
  display: flex; align-items: center; gap: 6px;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--accent-cyan);
}
.nav-links a i { font-size: 0.9rem; }

/* ── Hamburger Button ─────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px;
  transition: background 0.2s, border-color 0.2s;
  flex-shrink: 0;
}
.hamburger:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--border-active);
}
.ham-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-spring), opacity 0.2s, background 0.2s;
  transform-origin: center;
}
.hamburger.is-open .ham-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); background: var(--accent-cyan); }
.hamburger.is-open .ham-bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.is-open .ham-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: var(--accent-cyan); }

/* ── Mobile Menu ──────────────────────────────────────── */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 99;
  background: var(--bg-mobile-menu);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-active);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s var(--ease-smooth), opacity 0.25s ease;
}
.mobile-menu.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu-inner {
  padding: 1rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background 0.2s, color 0.2s;
  border: 1px solid transparent;
}
.mobile-nav-link:hover, .mobile-nav-link.active {
  background: rgba(6, 182, 212, 0.06);
  border-color: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
}
.mobile-nav-link svg, .mobile-nav-link i {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.mobile-menu-divider {
  height: 1px;
  background: var(--border-dim);
  margin: 0.75rem 0;
}
.mobile-menu-socials {
  display: flex;
  gap: 0.75rem;
  padding: 0 0.25rem;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: block; }
}

/* ══════════════════════════════════════════════════════════════
   HERO / TERMINAL DISPLAY
══════════════════════════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  justify-content: center;
  padding: 0 10%;
  position: relative;
}

.hero-status {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--accent-emerald);
  margin-bottom: 1.5rem;
  padding: 4px 12px; border-radius: var(--radius-sm);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.hero-title {
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: #fff;
}
.hero-title span {
  display: block;
  color: var(--text-secondary);
}

.hero-console {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  max-width: 600px;
  position: relative;
  overflow: hidden;
}
.hero-console::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
}
.console-line { margin-bottom: 0.5rem; display: flex; }
.console-prompt { color: var(--accent-purple); margin-right: 0.5rem; user-select: none; }
.console-output { color: var(--accent-cyan); }
.typewriter-cursor {
  display: inline-block; width: 8px; height: 1.2em; background: var(--text-primary);
  vertical-align: middle; margin-left: 4px;
}
.typewriter-cursor.blink {
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-actions {
  display: flex; gap: 1rem; margin-top: 2rem; flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono); font-size: 0.8rem; font-weight: 600;
  transition: all 0.2s var(--ease-smooth);
  cursor: pointer;
}
.btn-primary {
  background: var(--text-primary); color: var(--bg-core);
}
.btn-primary:hover {
  background: var(--text-secondary); transform: translateY(-2px);
}
.btn-outline {
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--border-active);
}
.btn-outline:hover {
  background: var(--bg-panel); border-color: var(--text-primary); transform: translateY(-2px);
}

/* ══════════════════════════════════════════════════════════════
   SECTION LAYOUT
══════════════════════════════════════════════════════════════ */
.section {
  padding: var(--space-section);
  position: relative;
  z-index: 10;
}
.section-header {
  margin-bottom: 3rem;
  display: flex; align-items: flex-end; gap: 1rem;
}
.section-title {
  font-size: 2rem; font-weight: 600; color: #fff;
  letter-spacing: -0.02em;
}
.section-line {
  flex: 1; height: 1px; background: var(--border-dim);
  margin-bottom: 0.6rem;
}
.section-meta {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted);
  margin-bottom: 0.5rem;
}

/* ══════════════════════════════════════════════════════════════
   ABOUT — METRICS DASHBOARD
══════════════════════════════════════════════════════════════ */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  transition: border-color 0.3s, background 0.3s;
}
.panel:hover {
  border-color: var(--border-active);
  background: var(--bg-panel-hover);
}
.panel-header {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 1rem;
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.panel-header svg { width: 16px; height: 16px; color: var(--accent-cyan); }

/* Grid allocations */
.col-profile { grid-column: span 5; }
.col-skills { grid-column: span 7; }
.col-timeline { grid-column: span 12; }

@media (max-width: 1024px) {
  .col-profile, .col-skills { grid-column: span 12; }
}

.profile-text {
  font-size: 0.95rem; color: var(--text-primary); line-height: 1.7;
  margin-bottom: 1.5rem;
}
.data-list {
  display: flex; flex-direction: column; gap: 0.8rem;
}
.data-item {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); font-size: 0.8rem;
  padding-bottom: 0.5rem; border-bottom: 1px dashed var(--border-dim);
}
.data-label { color: var(--text-secondary); }
.data-val { color: var(--accent-blue); }

/* Skill Bars */
.skill-group { margin-bottom: 1.2rem; }
.skill-label {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 0.75rem; margin-bottom: 0.4rem;
}
.skill-bar-bg {
  width: 100%; height: 6px; background: var(--bg-core);
  border-radius: 3px; overflow: hidden;
}
.skill-bar-fill {
  height: 100%; border-radius: 3px;
}
.fill-python { background: var(--accent-blue); width: 90%; }
.fill-js { background: var(--accent-amber); width: 85%; }
.fill-ml { background: var(--accent-emerald); width: 80%; }
.fill-api { background: var(--accent-purple); width: 88%; }

/* Timeline */
.timeline-track {
  display: flex; flex-direction: column; gap: 1.5rem;
  border-left: 1px solid var(--border-active);
  padding-left: 1.5rem; margin-left: 0.5rem;
}
.timeline-event { position: relative; }
.timeline-event::before {
  content: ''; position: absolute; left: -29px; top: 4px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.4);
}
.tl-date { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); margin-bottom: 0.2rem; }
.tl-title { font-size: 1rem; font-weight: 600; color: #fff; }
.tl-desc { font-size: 0.85rem; color: var(--text-secondary); margin-top: 0.4rem; }

/* ══════════════════════════════════════════════════════════════
   PROJECTS — DATA CARDS
══════════════════════════════════════════════════════════════ */
.filters {
  display: flex; gap: 0.5rem; margin-bottom: 2rem; flex-wrap: wrap;
}
.filter-btn {
  background: var(--bg-panel); border: 1px solid var(--border-dim);
  color: var(--text-secondary); font-family: var(--font-mono); font-size: 0.75rem;
  padding: 0.5rem 1rem; border-radius: var(--radius-sm);
  cursor: pointer; transition: all 0.2s;
}
.filter-btn.active, .filter-btn:hover {
  background: rgba(59, 130, 246, 0.1); border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.search-wrap {
  position: relative; margin-bottom: 2rem; max-width: 400px;
}
.search-wrap svg {
  position: absolute; left: 1rem; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); width: 16px; height: 16px;
}
.search-input {
  width: 100%; background: var(--bg-panel); border: 1px solid var(--border-dim);
  color: #fff; font-family: var(--font-sans); font-size: 0.9rem;
  padding: 0.8rem 1rem 0.8rem 2.5rem; border-radius: var(--radius-md);
  transition: border-color 0.2s; outline: none;
}
.search-input:focus { border-color: var(--accent-cyan); }

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

.data-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex; flex-direction: column;
  transition: transform 0.3s var(--ease-spring), border-color 0.3s;
  position: relative; overflow: hidden;
}
.data-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
}
.data-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 4px; height: 100%;
  background: var(--accent-blue); opacity: 0; transition: opacity 0.2s;
}
.data-card:hover::before { opacity: 1; }

.card-top {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 1rem;
}
.card-lang {
  font-family: var(--font-mono); font-size: 0.7rem;
  display: flex; align-items: center; gap: 4px;
}
.card-lang.cat-ai { color: var(--accent-purple); }
.card-lang.cat-web { color: var(--accent-blue); }
.card-lang.cat-tool { color: var(--accent-cyan); }
.card-lang.cat-bot { color: var(--accent-emerald); }
.card-lang::before {
  content: ''; display: block; width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
}
.card-metrics {
  display: flex; gap: 10px; font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted);
}
.card-metrics div { display: flex; align-items: center; gap: 4px; }
.card-metrics svg { width: 12px; height: 12px; }

.card-title {
  font-size: 1.1rem; font-weight: 600; color: #fff; margin-bottom: 0.5rem;
}
.card-desc {
  font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5;
  margin-bottom: 1.5rem; flex: 1;
}

.card-tags {
  display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.5rem;
}
.card-tag {
  font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-muted);
  background: var(--bg-core); padding: 2px 8px; border-radius: 4px; border: 1px solid var(--border-dim);
}

.card-links {
  display: flex; gap: 0.8rem; align-items: center;
  border-top: 1px dashed var(--border-dim); padding-top: 1rem;
}
.btn-card {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 0.5rem 1rem; border-radius: var(--radius-sm);
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600;
  transition: all 0.2s var(--ease-smooth);
  cursor: pointer; flex: 1; text-align: center;
  border: 1px solid var(--border-dim);
}
.btn-source {
  background: transparent; color: var(--text-primary);
}
.btn-source:hover {
  background: var(--bg-core); border-color: var(--text-secondary);
}
.btn-deploy {
  background: rgba(16, 185, 129, 0.05);
  border-color: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
}
.btn-deploy:hover {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--accent-emerald);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.1);
}
.btn-card svg { width: 14px; height: 14px; }

/* Search Highlight */
.highlight {
  background-color: rgba(6, 182, 212, 0.2);
  color: var(--accent-cyan);
  border-radius: 2px;
  padding: 0 2px;
}

/* Scroll Animations */
.scroll-animate {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-smooth), transform 0.6s var(--ease-smooth);
}
.scroll-animate.show {
  opacity: 1;
  transform: translateY(0);
}

/* ══════════════════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--border-dim);
  padding: 3rem 10%;
  text-align: center;
  margin-top: 4rem;
}
.footer-socials {
  display: flex; justify-content: center; gap: 1rem; margin-bottom: 1.5rem;
}
.social-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: var(--bg-panel); border: 1px solid var(--border-dim);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); transition: all 0.2s;
}
.social-icon:hover {
  background: var(--border-active); color: #fff; transform: translateY(-2px);
}
.social-icon svg { width: 18px; height: 18px; }
.footer-text {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted);
}

/* ══════════════════════════════════════════════════════════════
   ACCESSIBILITY
══════════════════════════════════════════════════════════════ */

/* Category Specific Card Accents */
.data-card.cat-ai::before { background: var(--accent-purple); }
.data-card.cat-ai:hover { border-color: rgba(139, 92, 246, 0.3); box-shadow: 0 0 15px rgba(139, 92, 246, 0.05); }

.data-card.cat-web::before { background: var(--accent-blue); }
.data-card.cat-web:hover { border-color: rgba(59, 130, 246, 0.3); box-shadow: 0 0 15px rgba(59, 130, 246, 0.05); }

.data-card.cat-tool::before { background: var(--accent-cyan); }
.data-card.cat-tool:hover { border-color: rgba(6, 182, 212, 0.3); box-shadow: 0 0 15px rgba(6, 182, 212, 0.05); }

.data-card.cat-bot::before { background: var(--accent-emerald); }
.data-card.cat-bot:hover { border-color: rgba(16, 185, 129, 0.3); box-shadow: 0 0 15px rgba(16, 185, 129, 0.05); }

/* Retro Terminal Empty State */
.empty-search-state {
  grid-column: 1 / -1;
  padding: 3rem;
  background: var(--bg-surface);
  border: 1px dashed var(--border-active);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  text-align: left;
}
.empty-search-code {
  color: #ef4444; /* Retro red */
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.empty-search-desc {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}
.empty-search-hint {
  color: var(--text-muted);
}


/* ══════════════════════════════════════════════════════════════
   INTRO OVERLAY — HELLO ANIMATION
══════════════════════════════════════════════════════════════ */
.intro-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #050505;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.intro-overlay.fade-out {
  opacity: 0;
  pointer-events: none;
}

.intro-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.hello-svg {
  width: clamp(260px, 65vw, 580px);
  height: auto;
  opacity: 0; /* JS reveals after dasharray is set */
  filter: drop-shadow(0 0 40px rgba(255, 255, 255, 0.08));
  transition: opacity 0.3s ease;
}

.intro-subtitle {
  font-family: var(--font-mono);
  font-size: clamp(0.7rem, 2vw, 0.9rem);
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.6s ease, transform 0.6s var(--ease-smooth);
}
.intro-subtitle.visible {
  opacity: 1;
  transform: translateY(0);
}

.skip-intro-btn {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.3);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.skip-intro-btn:hover {
  color: rgba(255,255,255,0.7);
  border-color: rgba(255,255,255,0.3);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}