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

/* Metric-adjusted local fallback for Inter — sized to match Inter's box
   model so hero text doesn't reflow (CLS) once the webfont swaps in. */
@font-face {
  font-family: 'Inter Fallback';
  src: local('Arial');
  ascent-override: 90.44%;
  descent-override: 22.52%;
  line-gap-override: 0%;
  size-adjust: 107.12%;
}

:root {
  --bg:                 #0d1117;
  --bg-card:            #161b22;
  --bg-elevated:        #1c2128;
  --border:             #30363d;
  --border-dim:         #21262d;
  --text:               #e6edf3;
  --text-muted:         #8b949e;
  --text-dim:           #9198a1;
  --accent:             #60a5fa;
  --accent-dim:         #3b82f6;
  --accent-glow:        rgba(96, 165, 250, 0.15);
  --accent-glow-strong: rgba(96, 165, 250, 0.3);
  --accent-rgb:         96, 165, 250;
  --btn-primary-hover:  #93c5fd;
  --bg-nav-blur:        rgba(13, 17, 23, 0.85);
  --bg-nav-mobile:      rgba(13, 17, 23, 0.97);
  --bg-footer:          #080c10;
  --terminal-cmd:       #60a5fa;
  --terminal-out:       #8b949e;
  --font-mono:          'JetBrains Mono', 'Courier New', monospace;
  --font-sans:          'Inter', 'Inter Fallback', system-ui, sans-serif;
  --radius-sm:          6px;
  --radius:             10px;
  --radius-lg:          16px;
  --transition:         0.25s ease;
}

/* ─── LIGHT THEME ─────────────────────────────────────────── */
[data-theme="light"] {
  --bg:                 #ffffff;
  --bg-card:            #f6f8fa;
  --bg-elevated:        #ffffff;
  --border:             #d0d7de;
  --border-dim:         #e8ebee;
  --text:               #1f2328;
  --text-muted:         #636c76;
  --text-dim:           #656d76;
  --accent:             #2563eb;
  --accent-dim:         #1d4ed8;
  --accent-glow:        rgba(37, 99, 235, 0.12);
  --accent-glow-strong: rgba(37, 99, 235, 0.25);
  --accent-rgb:         37, 99, 235;
  --btn-primary-hover:  #1d4ed8;
  --bg-nav-blur:        rgba(255, 255, 255, 0.90);
  --bg-nav-mobile:      rgba(255, 255, 255, 0.98);
  --bg-footer:          #f0f2f4;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg:                 #ffffff;
    --bg-card:            #f6f8fa;
    --bg-elevated:        #ffffff;
    --border:             #d0d7de;
    --border-dim:         #e8ebee;
    --text:               #1f2328;
    --text-muted:         #636c76;
    --text-dim:           #656d76;
    --accent:             #2563eb;
    --accent-dim:         #1d4ed8;
    --accent-glow:        rgba(37, 99, 235, 0.12);
    --accent-glow-strong: rgba(37, 99, 235, 0.25);
    --accent-rgb:         37, 99, 235;
    --btn-primary-hover:  #1d4ed8;
    --bg-nav-blur:        rgba(255, 255, 255, 0.90);
    --bg-nav-mobile:      rgba(255, 255, 255, 0.98);
    --bg-footer:          #f0f2f4;
  }
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

.accent { color: var(--accent); }

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

/* ─── REVEAL ANIMATION ───────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal:nth-child(3) { transition-delay: 0.16s; }
.reveal:nth-child(4) { transition-delay: 0.24s; }
.reveal:nth-child(5) { transition-delay: 0.32s; }
.reveal:nth-child(6) { transition-delay: 0.40s; }

/* ─── NAV ────────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 100;
  background: var(--bg-nav-blur);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}
#navbar.scrolled {
  border-color: var(--border-dim);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  transition: color var(--transition);
}
.nav-logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}
.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--accent); }

/* ─── THEME TOGGLE ───────────────────────────────────────── */
.theme-toggle {
  display: flex;
  gap: 1px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px;
  flex-shrink: 0;
}

.theme-btn {
  background: none;
  border: none;
  padding: 5px 9px;
  border-radius: 4px;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.78rem;
  line-height: 1;
  transition: all var(--transition);
}
.theme-btn:hover { color: var(--text-muted); }
.theme-btn.active {
  background: var(--accent-glow);
  color: var(--accent);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-hamburger:hover span { background: var(--accent); }

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 12px 24px 20px;
  border-top: 1px solid var(--border-dim);
  background: var(--bg-nav-mobile);
  gap: 16px;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.nav-mobile a:hover { color: var(--accent); }

/* ─── HERO ───────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 24px 80px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--accent-rgb),0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--accent-rgb),0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(var(--accent-rgb),0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

/* Terminal — always dark regardless of theme */
.terminal {
  background: #0a0d12;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(var(--accent-rgb),0.06),
    0 20px 60px rgba(0,0,0,0.6),
    0 0 40px var(--accent-glow);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  min-height: 220px;
}

.terminal-titlebar {
  background: #161b22;
  border-bottom: 1px solid #30363d;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red    { background: #ff5f57; }
.dot-yellow { background: #ffbd2e; }
.dot-green  { background: #28c840; }

.terminal-title {
  margin-left: 8px;
  font-size: 0.75rem;
  /* #656d76 on this always-dark #161b22 titlebar was only 3.3:1 (WCAG AA
     needs 4.5:1) — #9198a1 is the same dark-theme text-dim value used
     elsewhere, which measures 5.94:1 against this background. */
  color: #9198a1;
}

.terminal-body {
  padding: 20px;
  /* Reserves enough height for all 8 typed lines up front (line-height 2 ×
     0.875rem × 8 lines + padding, with wrap-room to spare) so the typewriter
     animation in main.js doesn't grow the box mid-load and shift .hero-text
     via the grid's align-items: center (a real, measured CLS source). */
  min-height: 320px;
  line-height: 2;
}

#terminal-output .line { display: block; }
#terminal-output .cmd  { color: var(--terminal-cmd); }
#terminal-output .out  { color: var(--terminal-out); }

.cursor {
  display: inline-block;
  color: var(--terminal-cmd);
  animation: blink 1s step-end infinite;
  font-weight: 700;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* Hero text */
.hero-text { display: flex; flex-direction: column; gap: 16px; }

.hero-name {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text) 60%, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
}

.hero-sub {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 420px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}
.btn-primary:hover {
  background: var(--btn-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(var(--accent-rgb),0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-secondary:hover {
  background: var(--accent-glow);
  transform: translateY(-2px);
}

.btn-ghost {
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

.scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-dim);
  font-size: 1.1rem;
  animation: bounce 2s ease-in-out infinite;
  z-index: 2;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ─── STATS ──────────────────────────────────────────────── */
#stats {
  background: var(--bg-card);
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
  padding: 40px 24px;
}

.stats-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 24px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
  min-width: 120px;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat-divider {
  width: 1px;
  height: 50px;
  background: var(--border);
}

/* ─── SECTION SHARED ─────────────────────────────────────── */
.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 90px 24px;
}

.section-header {
  margin-bottom: 48px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ─── TECH STACK ─────────────────────────────────────────── */
#stack { background: var(--bg); }

.stack-group { margin-bottom: 40px; }

.stack-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-dim);
}

.stack-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stack-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: all var(--transition);
  cursor: default;
}
.stack-card:hover {
  border-color: var(--accent);
  color: var(--text);
  background: var(--bg-elevated);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(var(--accent-rgb),0.12);
}
.stack-card i { font-size: 1.5rem; }
.stack-card img.si-icon { width: 1.5rem; height: 1.5rem; filter: brightness(2); }
[data-theme="light"] .stack-card img.si-icon { filter: none; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .stack-card img.si-icon { filter: none; }
}

.stack-icon-text {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

/* ─── EXPERIENCE TIMELINE ────────────────────────────────── */
#experience {
  background: var(--bg-card);
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
}

.timeline {
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -34px;
  top: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-card);
  box-shadow: 0 0 8px var(--accent-glow-strong);
}

.timeline-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.timeline-card:hover {
  border-color: rgba(var(--accent-rgb),0.3);
  box-shadow: 0 4px 24px rgba(var(--accent-rgb),0.07);
}

.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.timeline-role {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.timeline-company {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  white-space: nowrap;
  padding-top: 4px;
}

.timeline-bullets {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}
.timeline-bullets li {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
}
.timeline-bullets li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  padding: 3px 10px;
  background: rgba(var(--accent-rgb),0.08);
  border: 1px solid rgba(var(--accent-rgb),0.2);
  border-radius: 99px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
}

/* ─── ACHIEVEMENTS ───────────────────────────────────────── */
#achievements { background: var(--bg); }

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

.achievement-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}
.achievement-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(var(--accent-rgb),0.12);
}

.achievement-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.achievement-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.achievement-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ─── CERTS & PUBLICATIONS ───────────────────────────────── */
#certs {
  background: var(--bg-card);
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
}

.certs-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.certs-col-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-dim);
}

.cert-card, .pub-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  margin-bottom: 12px;
  transition: border-color var(--transition);
}
.cert-card:hover, .pub-card:hover {
  border-color: rgba(var(--accent-rgb),0.3);
}

.cert-icon, .pub-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.cert-name, .pub-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.cert-issuer, .pub-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ─── FOOTER / CONTACT ───────────────────────────────────── */
#contact {
  position: relative;
  background: var(--bg-footer);
  border-top: 1px solid var(--border-dim);
  overflow: hidden;
}

.footer-glow {
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 200px;
  background: radial-gradient(ellipse, rgba(var(--accent-rgb),0.08) 0%, transparent 70%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px 40px;
}

.footer-brand {
  text-align: center;
  margin-bottom: 48px;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
}

.footer-sub {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-bottom: 48px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-link i {
  font-size: 1rem;
  color: var(--accent);
  width: 20px;
  text-align: center;
}
.footer-link:hover { color: var(--accent); }

.footer-bottom {
  text-align: center;
  border-top: 1px solid var(--border-dim);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-bottom p {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.footer-meta a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  font-size: 0.78rem;
  transition: color var(--transition);
}
.footer-meta a:hover { color: var(--accent); }

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  .hero-text { align-items: center; }
  .hero-sub  { max-width: 100%; }
  .certs-row { grid-template-columns: 1fr; }
  .stat-divider { display: none; }
}

@media (max-width: 640px) {
  .nav-links     { display: none; }
  .nav-hamburger { display: flex; }

  .section-inner { padding: 64px 20px; }
  .hero-cta { justify-content: center; }
  .timeline { padding-left: 20px; }
  .timeline-dot { left: -26px; }
  .timeline-card { padding: 18px 20px; }
  .timeline-header { flex-direction: column; gap: 4px; }
  .achievements-grid { grid-template-columns: 1fr; }
  .stack-grid { gap: 8px; }
}

@media (max-width: 360px) {
  .theme-btn { padding: 5px 6px; }
}

/* ─── SKIP LINK (accessibility) ─────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 8px 20px;
  background: var(--accent);
  color: var(--bg);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  z-index: 300;
  transition: top 0.15s ease;
  white-space: nowrap;
}
.skip-link:focus { top: 16px; }

/* ─── FOCUS RINGS (keyboard navigation) ─────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ─── SCROLL PROGRESS ───────────────────────────────────── */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--accent);
  z-index: 200;
  pointer-events: none;
  transition: width 0.1s linear;
}

/* ─── BACK TO TOP ────────────────────────────────────────── */
#back-to-top {
  position: fixed;
  bottom: 28px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 50;
}
#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}
#back-to-top:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent);
}

/* ─── COPY EMAIL BUTTON ──────────────────────────────────── */
.footer-link-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.copy-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  transition: all var(--transition);
  line-height: 1;
}
.copy-btn:hover { color: var(--accent); }
.copy-btn.copied { color: #28c840; }

/* ─── EXPERIENCE DURATION BADGE ─────────────────────────── */
.timeline-duration {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  opacity: 0.75;
  margin-left: 6px;
}

/* ─── ACTIVE NAV LINK (scroll spy) ──────────────────────── */
.nav-links a.active { color: var(--accent); }

/* ─── ICON-ACCENT (replaces inline style="color:var(--accent)") ── */
.icon-accent { color: var(--accent); }

/* ─── REDUCED MOTION ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ─── PRINT ──────────────────────────────────────────────── */
@media print {
  #navbar, #scroll-progress, #back-to-top, .scroll-hint,
  .theme-toggle, .hero-bg-grid, .hero-glow, .footer-glow,
  .copy-btn { display: none !important; }

  body { background: white !important; color: black !important; }

  .hero-name {
    background: none !important;
    -webkit-text-fill-color: black !important;
    color: black !important;
  }

  .accent, .section-label { color: #333 !important; }
  a[href]::after { content: " (" attr(href) ")"; font-size: 0.7em; color: #666; }
  a[href^="#"]::after, a[href^="mailto:"]::after { content: ""; }

  .timeline-card, .achievement-card, .cert-card, .pub-card {
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    break-inside: avoid;
  }

  .reveal { opacity: 1 !important; transform: none !important; }
  .terminal { display: none !important; }
}