/* ==========================================================================
   Antigravity Career Timeline - Theme & Component Styles
   Dual-Theme: Cyber Matrix (Dark Default) & Clean Slate (Light)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* --- 1. CSS Custom Properties / Design Tokens --- */
:root {
  /* Cyber Matrix (Dark Mode - Default) */
  --bg-primary: #0a0e14;
  --bg-secondary: #111822;
  --bg-card: #121a24;
  --bg-surface: #172230;
  --bg-surface-hover: #1c2a3b;
  --bg-chip: #1e293b80;
  
  --text-primary: #f0fdf4;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-contrast: #ffffff;
  
  --border-color: #1e293b;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(16, 185, 129, 0.35);
  
  /* Brand Accents */
  --accent-primary: #10b981;    /* Emerald */
  --accent-neon: #00ff88;       /* Matrix Neon */
  --accent-cyan: #38bdf8;       /* Sky / Cyber Blue */
  --accent-amber: #f59e0b;      /* Safety Amber */
  --accent-violet: #a855f7;     /* Deep Violet */
  --accent-rose: #f43f5e;       /* Rose */
  --accent-gold: #facc15;       /* Education Gold */
  --accent-teal: #14b8a6;       /* Medical Teal */

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(0, 255, 136, 0.15);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --font-heading: 'Bebas Neue', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --rail-line: rgba(56, 189, 248, 0.25);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  /* Clean Slate (Light Mode) */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-surface: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --bg-chip: #e2e8f0;

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

  --border-color: #cbd5e1;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-glow: rgba(5, 150, 105, 0.25);

  --accent-primary: #059669;
  --accent-neon: #047857;
  --accent-cyan: #0284c7;
  --accent-amber: #d97706;
  --accent-violet: #7e22ce;
  --accent-rose: #e11d48;
  --accent-gold: #b45309;
  --accent-teal: #0f766e;

  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 20px rgba(5, 150, 105, 0.1);

  --rail-line: rgba(2, 132, 199, 0.3);
}

/* --- 2. Base & Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(16, 185, 129, 0.08), transparent 70%),
    radial-gradient(ellipse 60% 40% at 90% 80%, rgba(56, 189, 248, 0.04), transparent 60%);
  background-attachment: fixed;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--accent-neon);
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- 3. Top Navigation & Global Controls --- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}
[data-theme="light"] .site-nav {
  background: rgba(255, 255, 255, 0.9);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}
.btn-pill:hover {
  background: var(--bg-surface-hover);
  border-color: var(--accent-primary);
  color: var(--accent-neon);
  transform: translateY(-1px);
}
.btn-pill.primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  color: #000;
  font-weight: 700;
  border: none;
}
.btn-pill.primary:hover {
  box-shadow: 0 0 15px var(--accent-neon);
  color: #000;
}

/* --- 4. Hero Section --- */
.hero-section {
  padding: 50px 0 30px;
  position: relative;
}

.hero-header {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-neon);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-neon);
  box-shadow: 0 0 8px var(--accent-neon);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(48px, 6.5vw, 88px);
  line-height: 0.95;
  letter-spacing: 0.03em;
  background: linear-gradient(135deg, var(--text-contrast) 0%, var(--accent-neon) 50%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
}

.hero-subtitle {
  font-family: var(--font-mono);
  color: var(--accent-primary);
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 600;
  margin-top: 10px;
}

.hero-person-title {
  font-family: var(--font-body);
  font-size: clamp(14px, 1.6vw, 17px);
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-top: 6px;
}

/* Contact Links Bar */
.contact-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.contact-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  text-decoration: none;
}
.contact-item:hover {
  border-color: var(--accent-primary);
  color: var(--accent-neon);
  background: var(--bg-surface);
  text-decoration: none;
}
.contact-icon {
  font-size: 14px;
}

/* Executive Stat Strip */
.hero-stat-strip {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 8px 18px;
  margin-top: 22px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-sm);
}

.stat-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.stat-icon {
  font-size: 13px;
}

.stat-highlight {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  color: var(--accent-neon);
}

.stat-detail {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-sep {
  color: var(--border-color);
  font-size: 13px;
  user-select: none;
}

/* --- 5. Timeline Container & Rail --- */
.timeline-wrapper {
  position: relative;
  padding: 30px 0 80px 0;
}

.timeline-rail {
  position: absolute;
  left: 92px;
  top: 10px;
  bottom: 30px;
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--rail-line) 5%, var(--rail-line) 95%, transparent);
}

/* Timeline Entry Grid */
.timeline-entry {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 0 44px;
  position: relative;
  margin-bottom: 20px;
  opacity: 1;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.timeline-entry.hidden {
  display: none !important;
}

/* Year Column */
.entry-year-col {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding-top: 22px;
}

.entry-year-label {
  font-family: var(--font-heading);
  font-size: 26px;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  line-height: 1;
  transition: color var(--transition-fast);
}

.entry-year-range {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
  white-space: nowrap;
}

/* Node Connector Dot */
.entry-node-dot {
  position: absolute;
  left: 85px;
  top: 26px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent-card, var(--accent-primary));
  z-index: 2;
  transition: all var(--transition-fast);
}

.entry-node-dot::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--accent-card, var(--accent-neon));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.entry-node-dot.diamond {
  border-radius: 3px;
  transform: rotate(45deg);
  border-color: var(--accent-gold);
}
.entry-node-dot.diamond::after {
  border-radius: 1px;
  background: var(--accent-gold);
}

.timeline-entry:hover .entry-node-dot {
  box-shadow: 0 0 16px var(--accent-card, var(--accent-neon));
  transform: scale(1.15);
}
.timeline-entry:hover .entry-node-dot.diamond {
  transform: rotate(45deg) scale(1.15);
  box-shadow: 0 0 16px var(--accent-gold);
}
.timeline-entry:hover .entry-node-dot::after {
  opacity: 1;
}
.timeline-entry:hover .entry-year-label {
  color: var(--accent-card, var(--accent-neon));
}

/* --- 7. Timeline Card --- */
.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.timeline-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-card, var(--accent-primary)), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.timeline-card:hover {
  border-color: var(--accent-card, var(--accent-primary));
  box-shadow: 0 8px 32px -6px var(--accent-glow, rgba(16, 185, 129, 0.2));
  transform: translateY(-2px);
}
.timeline-card:hover::before {
  opacity: 1;
}

/* Card Header Layout */
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.card-title-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  min-width: 0;
}

/* Logo Badge / Icon */
.company-logo-badge {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  color: #0f172a;
  flex-shrink: 0;
  overflow: hidden;
  padding: 5px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}
.timeline-card:hover .company-logo-badge {
  transform: scale(1.08) rotate(-3deg);
  border-color: var(--accent-card, var(--accent-primary));
}

.company-logo-badge img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 4px;
}

.company-logo-badge svg {
  width: 32px;
  height: 32px;
}

.company-meta-block {
  flex: 1;
  min-width: 0;
}

.company-name-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.company-name {
  font-family: var(--font-heading);
  font-size: 26px;
  letter-spacing: 0.04em;
  color: var(--text-contrast);
  line-height: 1.1;
}

.company-subname {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: normal;
  margin-left: 4px;
}

.role-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--accent-cyan);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  padding: 2px 9px;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  white-space: nowrap;
}

.tag.highlight {
  color: var(--accent-card, var(--accent-neon));
  border-color: currentColor;
  background: rgba(16, 185, 129, 0.08);
}
.tag.location {
  color: var(--text-secondary);
}

/* Expand Button */
.expand-toggle {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 18px;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  user-select: none;
  transition: all var(--transition-fast);
}
.timeline-card:hover .expand-toggle,
.projects-header:hover .expand-toggle,
.skills-header:hover .expand-toggle {
  border-color: var(--accent-neon);
  color: var(--accent-neon);
  background: var(--bg-surface-hover);
}

/* --- 8. Collapsible Detail Panel --- */
.card-panel {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease;
}
.card-panel.open {
  max-height: 2500px;
  opacity: 1;
}

.panel-content {
  padding-top: 20px;
  margin-top: 16px;
  border-top: 1px dashed var(--border-color);
}

.section-subtitle {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-card, var(--accent-cyan));
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Sub-projects & Highlights Grid */
.subproject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.subproject-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  transition: border-color var(--transition-fast);
}
.subproject-box:hover {
  border-color: var(--accent-card, var(--accent-primary));
}

.subproject-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.subproject-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 8px;
}

.subproject-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.chip-mini {
  font-family: var(--font-mono);
  font-size: 9.5px;
  padding: 1px 7px;
  border-radius: var(--radius-full);
  background: var(--bg-chip);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

/* Bullet Responsibilities List */
.resp-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.resp-list li {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-left: 22px;
  position: relative;
}

.resp-list li::before {
  content: '▸';
  position: absolute;
  left: 4px;
  color: var(--accent-card, var(--accent-neon));
  font-size: 13px;
  top: -1px;
}

.resp-list strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Divider Line */
.content-divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 16px 0;
}

/* Education / Degree Detail Card */
.education-box {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: rgba(250, 204, 21, 0.05);
  border: 1px solid rgba(250, 204, 21, 0.2);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}

.edu-icon {
  font-size: 28px;
  line-height: 1;
}

.edu-info h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.edu-info p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Certifications Showcase Grid */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.cert-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all var(--transition-fast);
}
.cert-card:hover {
  border-color: var(--accent-gold);
  transform: translateY(-1px);
}

.cert-year {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--accent-gold);
}

.cert-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
}

.cert-issuer {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* --- 9. Color Theme Variations --- */
.t-emerald { --accent-card: #10b981; --accent-glow: rgba(16, 185, 129, 0.25); }
.t-cyan    { --accent-card: #38bdf8; --accent-glow: rgba(56, 189, 248, 0.25); }
.t-amber   { --accent-card: #f59e0b; --accent-glow: rgba(245, 158, 11, 0.25); }
.t-gold    { --accent-card: #facc15; --accent-glow: rgba(250, 204, 21, 0.25); }
.t-teal    { --accent-card: #14b8a6; --accent-glow: rgba(20, 184, 166, 0.25); }
.t-violet  { --accent-card: #a855f7; --accent-glow: rgba(168, 85, 247, 0.25); }
.t-rose    { --accent-card: #f43f5e; --accent-glow: rgba(244, 63, 94, 0.25); }

/* --- 10. Featured Side Projects Section --- */
.projects-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin: 40px 0;
  box-shadow: var(--shadow-sm);
}

.projects-header {
  margin-bottom: 24px;
}

.projects-heading {
  font-family: var(--font-heading);
  font-size: clamp(32px, 4vw, 50px);
  line-height: 0.95;
  letter-spacing: 0.03em;
  background: linear-gradient(135deg, var(--text-contrast) 0%, var(--accent-neon) 50%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
}

.projects-sub {
  font-family: var(--font-body);
  font-size: clamp(13px, 1.4vw, 15px);
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-top: 8px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.side-project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}
.side-project-card:hover {
  border-color: var(--card-accent, var(--accent-primary));
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}
.side-project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--card-accent, var(--accent-primary)), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.side-project-card:hover::before {
  opacity: 1;
}

.side-project-top {
  margin-bottom: 14px;
}

.side-project-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.side-project-icon {
  font-size: 22px;
}

.side-project-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--card-accent, var(--accent-neon));
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.side-project-title {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.side-project-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.side-project-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.side-project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--card-accent, var(--accent-neon));
  text-decoration: none;
  transition: all var(--transition-fast);
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
}
.side-project-link:hover {
  text-decoration: underline;
  transform: translateX(2px);
}

/* --- 11. Technical Skills Matrix Section --- */
.skills-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin: 40px 0;
  box-shadow: var(--shadow-sm);
}

.skills-header {
  margin-bottom: 24px;
}

.skills-heading {
  font-family: var(--font-heading);
  font-size: clamp(32px, 4vw, 50px);
  line-height: 0.95;
  letter-spacing: 0.03em;
  background: linear-gradient(135deg, var(--text-contrast) 0%, var(--accent-neon) 50%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
}

.skills-sub {
  font-family: var(--font-body);
  font-size: clamp(13px, 1.4vw, 15px);
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-top: 8px;
}

.skills-matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.skill-category-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
}

.category-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cat-accent, var(--accent-cyan));
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.skill-chips-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.skill-chip:hover {
  border-color: var(--cat-accent, var(--accent-neon));
  color: var(--text-primary);
  transform: translateY(-1px);
}
.skill-chip.featured {
  border-color: rgba(16, 185, 129, 0.4);
  color: var(--accent-neon);
  background: rgba(16, 185, 129, 0.06);
}

/* --- 11. Toast Notification --- */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-surface);
  color: var(--accent-neon);
  border: 1px solid var(--accent-primary);
  padding: 10px 18px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: all var(--transition-fast);
  z-index: 999;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* --- 12. Footer --- */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 42px 0 36px;
  margin-top: 50px;
  background: var(--bg-secondary);
}

.footer-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.site-footer .contact-bar {
  margin-top: 0;
  justify-content: center;
}

.footer-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}
.footer-text a {
  color: var(--accent-neon);
}

/* --- 13. Responsive Media Queries --- */
@media (max-width: 768px) {
  .timeline-rail {
    left: 48px;
  }
  .entry-node-dot {
    left: 41px;
  }
  .timeline-entry {
    grid-template-columns: 40px 1fr;
    gap: 0 24px;
  }
  .entry-year-label {
    font-size: 20px;
  }
  .company-name {
    font-size: 22px;
  }
  .timeline-card {
    padding: 16px;
  }
  .subproject-grid {
    grid-template-columns: 1fr;
  }
  .hero-name {
    font-size: 42px;
  }
  .hero-metrics {
    grid-template-columns: 1fr 1fr;
  }
  .timeline-controls {
    top: 54px;
  }
}

@media (max-width: 480px) {
  .timeline-rail {
    display: none;
  }
  .entry-node-dot {
    display: none;
  }
  .timeline-entry {
    grid-template-columns: 1fr;
    gap: 6px 0;
  }
  .entry-year-col {
    align-items: flex-start;
    padding-top: 0;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
  }
}