/* ═══════════════════════════════════════════════════════════════════════════
   TOKENS – dark (default) + light
   ═══════════════════════════════════════════════════════════════════════════ */
:root {
  --bg:                #080810;
  --bg-2:              #0e0e1a;
  --bg-card:           #13131f;
  --bg-card-2:         #1a1a28;
  --bg-header:         rgba(8, 8, 16, 0.82);
  --border:            rgba(77, 208, 225, 0.12);
  --border-hi:         rgba(77, 208, 225, 0.4);
  --cyan:              #4dd0e1;
  --cyan-soft:         #38bdd0;
  --cyan-dim:          rgba(77, 208, 225, 0.09);
  --cyan-glow:         rgba(77, 208, 225, 0.20);
  --purple:            #a78bfa;
  --purple-dim:        rgba(167, 139, 250, 0.10);
  --purple-glow:       rgba(167, 139, 250, 0.18);
  --text:              #c8d4e0;
  --text-muted:        #586274;
  --text-strong:       #edf2f8;
  --dot-opacity:       0.035;
  --radius:            12px;
  --radius-lg:         18px;
  --header-h:          64px;
  --font-sans:         'Space Grotesk', system-ui, sans-serif;
  --font-mono:         'JetBrains Mono', 'Fira Code', monospace;
  --ease:              cubic-bezier(0.4, 0, 0.2, 1);
  --spring:            cubic-bezier(0.34, 1.56, 0.64, 1);
  --t:                 0.22s;

  /* Global Dynamic Module Component System Tokens */
  --cursor-gradient:   radial-gradient(circle, rgba(77, 208, 225, 0.06) 0%, transparent 70%);
  --hero-blob-left:    radial-gradient(circle, rgba(77, 208, 225, 0.07) 0%, transparent 70%);
  --hero-blob-right:   radial-gradient(circle, rgba(167, 139, 250, 0.05) 0%, transparent 70%);
  --scrolled-shadow:   0 1px 40px rgba(0, 0, 0, 0.3);
  --btn-white-glint:   rgba(255, 255, 255, 0.12);
  --track-bg:          #143242;
  --fill-bg:           linear-gradient(90deg, #00b4d8, var(--cyan));
  --shimmer-gradient:  linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  --timeline-border:   rgba(77, 208, 225, 0.2);
  --card-shadow:       0 8px 24px rgba(0, 0, 0, 0.15);
  --project-shadow:    0 16px 40px rgba(0, 0, 0, 0.25);
  --github-shadow:     0 12px 30px rgba(0, 0, 0, 0.22);
  --timeline-shadow:   0 6px 24px rgba(0, 0, 0, 0.18);
  --contact-vignette:  radial-gradient(circle, rgba(77, 208, 225, 0.06) 0%, transparent 70%);
  --mobile-shadow:     -12px 0 40px rgba(0, 0, 0, 0.35);
}

[data-theme="light"] {
  --bg:                #f0f4f8;
  --bg-2:              #e6ecf3;
  --bg-card:           #ffffff;
  --bg-card-2:         #eef2f8;
  --bg-header:         rgba(240, 244, 248, 0.88);
  --border:            rgba(0, 140, 160, 0.14);
  --border-hi:         rgba(0, 140, 160, 0.42);
  --cyan:              #0097a7;
  --cyan-soft:         #00838f;
  --cyan-dim:          rgba(0, 151, 167, 0.09);
  --cyan-glow:         rgba(0, 151, 167, 0.18);
  --purple:            #7c3aed;
  --purple-dim:        rgba(124, 58, 237, 0.08);
  --purple-glow:       rgba(124, 58, 237, 0.15);
  --text:              #374151;
  --text-muted:        #9ca3af;
  --text-strong:       #0f172a;
  --dot-opacity:       0.055;

  /* Global Light Token Context Overrides */
  --cursor-gradient:   radial-gradient(circle, rgba(0, 151, 167, 0.04) 0%, transparent 70%);
  --hero-blob-left:    radial-gradient(circle, rgba(0, 151, 167, 0.05) 0%, transparent 70%);
  --hero-blob-right:   radial-gradient(circle, rgba(124, 58, 237, 0.03) 0%, transparent 70%);
  --scrolled-shadow:   0 1px 40px rgba(15, 23, 42, 0.08);
  --btn-white-glint:   rgba(255, 255, 255, 0.22);
  --track-bg:          #80deea;
  --fill-bg:           linear-gradient(90deg, #0077b6, #0097a7);
  --shimmer-gradient:  linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  --timeline-border:   rgba(0, 151, 167, 0.25);
  --card-shadow:       0 8px 24px rgba(15, 23, 42, 0.05);
  --project-shadow:    0 16px 40px rgba(15, 23, 42, 0.07);
  --github-shadow:     0 12px 30px rgba(15, 23, 42, 0.06);
  --timeline-shadow:   0 6px 24px rgba(15, 23, 42, 0.05);
  --contact-vignette:  radial-gradient(circle, rgba(0, 151, 167, 0.04) 0%, transparent 70%);
  --mobile-shadow:     -12px 0 40px rgba(15, 23, 42, 0.08);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  color-scheme: dark;
}
[data-theme="light"] { color-scheme: light; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  #bgCanvas { display: none; }
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   BASE
   ═══════════════════════════════════════════════════════════════════════════ */
body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}

#bgCanvas {
  position: fixed;
  inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at 50% 30%, transparent 20%, var(--bg) 88%);
  pointer-events: none;
  z-index: 0;
}

header, section, footer, .scroll-top, .cursor-glow { position: relative; z-index: 1; }

.cursor-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: var(--cursor-gradient);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: transform 0.08s linear;
  will-change: transform;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SCROLL REVEAL
   ═══════════════════════════════════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }
.reveal-delay-5 { transition-delay: 0.40s; }

/* ═══════════════════════════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════════════════════════ */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
  gap: 1rem;
  background: var(--bg-header);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.35s var(--ease), box-shadow 0.3s var(--ease);
}

header.scrolled {
  border-bottom-color: var(--border-hi);
  box-shadow: var(--scrolled-shadow);
}

.wordmark {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  font-style: normal;
  letter-spacing: 0;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  color: var(--text-strong);
  background: none;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: unset;
  background-clip: unset;
  transition: opacity var(--t) var(--ease);
}
.wordmark:hover { opacity: 0.75; }

.wordmark::before {
  content: '~/';
  color: var(--cyan);
  font-weight: 700;
  margin-right: 1px;
}

.wordmark::after {
  content: '_';
  color: var(--cyan);
  font-weight: 700;
  margin-left: 2px;
  animation: blink 1.1s step-start infinite;
}

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

.menu-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  margin-right: 0.5rem;
}

.nav-links a {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.3rem 0.55rem;
  border-radius: 6px;
  transition: color var(--t) var(--ease), background var(--t) var(--ease);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 1px; left: 50%; right: 50%;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px;
  transition: left var(--t) var(--ease), right var(--t) var(--ease);
}

.nav-links a:hover::after,
.nav-links a.active::after { left: 0.3rem; right: 0.3rem; }

.nav-links a:hover,
.nav-links a.active,
.nav-links a:focus-visible {
  color: var(--cyan);
  background: var(--cyan-dim);
  outline: none;
}

.header-controls { display: flex; align-items: center; gap: 0.4rem; }

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  background: transparent;
  border: 1px solid var(--border-hi);
  border-radius: 8px;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--t) var(--ease), background var(--t) var(--ease), border-color var(--t) var(--ease), transform var(--t) var(--spring);
  flex-shrink: 0;
}
.icon-btn:hover, .icon-btn:focus-visible {
  color: var(--cyan);
  background: var(--cyan-dim);
  border-color: var(--cyan);
  outline: none;
  transform: scale(1.08);
}

[data-theme="dark"]  .icon-sun  { display: block; }
[data-theme="dark"]  .icon-moon { display: none; }
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0 0.75rem;
  height: 34px;
  background: transparent;
  border: 1px solid var(--border-hi);
  border-radius: 8px;
  color: var(--cyan);
  cursor: pointer;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease), color var(--t) var(--ease), transform var(--t) var(--spring);
  flex-shrink: 0;
}
.lang-btn:hover, .lang-btn:focus-visible {
  background: var(--cyan-dim);
  outline: none;
  transform: scale(1.05);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px; height: 38px;
  padding: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  flex-shrink: 0;
  z-index: 101;
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease), background var(--t) var(--ease);
}
.hamburger:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
  background: var(--cyan-dim);
}
.hamburger.open {
  border-color: var(--cyan);
  background: var(--cyan-dim);
}
.hamburger span {
  display: block;
  width: 100%; height: 1.5px;
  background: var(--cyan);
  border-radius: 2px;
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease), width 0.25s var(--ease);
  transform-origin: center;
}
.hamburger span:nth-child(1) { width: 100%; }
.hamburger span:nth-child(2) { width: 70%; }
.hamburger span:nth-child(3) { width: 85%; }
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); width: 100%; }
.hamburger.open span:nth-child(2) { opacity: 0; width: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); width: 100%; }

/* ═══════════════════════════════════════════════════════════════════════════
   SECTION BASE
   ═══════════════════════════════════════════════════════════════════════════ */
section {
  padding: clamp(4rem, 8vw, 6rem) 0;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 3rem);
}

.section-title {
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: -0.025em;
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-title::before {
  content: '';
  display: block;
  width: 3px;
  height: 1.2em;
  background: linear-gradient(to bottom, var(--cyan), var(--purple));
  border-radius: 2px;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════════════════════════════ */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 4rem) clamp(1.5rem, 7vw, 5rem) 5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -15%;
  width: 60vw;
  height: 60vw;
  border-radius: 50%;
  background: var(--hero-blob-left);
  pointer-events: none;
  animation: blob-drift 12s ease-in-out infinite alternate;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -10%;
  width: 40vw;
  height: 40vw;
  border-radius: 50%;
  background: var(--hero-blob-right);
  pointer-events: none;
  animation: blob-drift 16s ease-in-out infinite alternate-reverse;
}
@keyframes blob-drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(3%, 4%) scale(1.06); }
}

.hero-inner { max-width: 820px; position: relative; z-index: 1; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  opacity: 0.8;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.hero-eyebrow::before {
  content: '';
  width: 24px; height: 1px;
  background: var(--cyan);
  opacity: 0.6;
  display: inline-block;
}

.hero-title {
  font-size: clamp(2.1rem, 5.8vw, 3.8rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.035em;
  color: var(--text-strong);
  margin-bottom: 1.5rem;
}

.hero-title .typed-cursor {
  display: inline-block;
  width: 3px;
  height: 0.9em;
  background: var(--cyan);
  margin-left: 4px;
  vertical-align: middle;
  border-radius: 1px;
  animation: blink 1s step-end infinite;
}

.hero-quote {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 560px;
  margin-bottom: 2.5rem;
  padding: 1rem 1.2rem;
  border-left: 2px solid var(--cyan);
  background: var(--cyan-dim);
  border-radius: 0 var(--radius) var(--radius) 0;
  position: relative;
}

.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; margin-bottom: 3.5rem; }

.hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  cursor: pointer;
  text-decoration: none;
  transition: opacity var(--t) var(--ease), transform var(--t) var(--spring);
}
.hero-stat:hover {
  opacity: 0.75;
  transform: translateY(-2px);
}
.hero-stat:hover .hero-stat__label {
  color: var(--cyan);
}

.hero-stat__num {
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-strong);
  line-height: 1;
}

.hero-stat__num .stat-accent {
  color: var(--cyan);
}

.hero-stat__label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
}

/* ═══════════════════════════════════════════════════════════════════════════
   ABOUT
   ═══════════════════════════════════════════════════════════════════════════ */
.about-text {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.75;
  max-width: 680px;
  color: var(--text);
}

.about-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2rem;
}

.about-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: var(--bg-card);
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease), background var(--t) var(--ease);
}
.about-badge:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
}
.about-badge .badge-icon { font-size: 0.9rem; }

/* ═══════════════════════════════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.5rem;
  background: var(--cyan);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background var(--t) var(--ease), transform var(--t) var(--spring), box-shadow var(--t) var(--ease);
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--btn-white-glint);
  transform: translateX(-100%);
  transition: transform 0.3s var(--ease);
}
.btn:hover::before { transform: translateX(0); }
.btn:hover, .btn:focus-visible {
  background: var(--cyan-soft);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--cyan-glow);
  outline: none;
}

.btn--ghost {
  background: transparent;
  color: var(--cyan);
  border: 1px solid var(--border-hi);
}
.btn--ghost::before { background: var(--cyan-dim); }
.btn--ghost:hover, .btn--ghost:focus-visible {
  background: var(--cyan-dim);
  box-shadow: none;
}

/* ═══════════════════════════════════════════════════════════════════════════
   PROJECTS GRID
   ═══════════════════════════════════════════════════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
  overflow: hidden;
  transition: border-color var(--t) var(--ease), transform 0.3s var(--spring), box-shadow var(--t) var(--ease);
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--cyan-glow), var(--purple-glow));
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  pointer-events: none;
}
.project-card:hover::before { opacity: 1; }

.project-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
  border-radius: 99px 99px 0 0;
}
.project-card:hover::after { transform: scaleX(1); }

.project-card:hover, .project-card:focus-visible {
  border-color: var(--border-hi);
  transform: translateY(-4px);
  box-shadow: var(--project-shadow), 0 0 0 1px var(--border-hi);
  outline: none;
}

.project-card__tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cyan);
  opacity: 0.7;
}

.project-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-strong);
  line-height: 1.2;
  transition: color var(--t) var(--ease);
}
.project-card:hover .project-card__title { color: var(--cyan); }

.project-card__text {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.project-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
  opacity: 0.7;
  margin-top: 0.4rem;
  transition: opacity var(--t) var(--ease), gap var(--t) var(--ease);
}
.project-card:hover .project-card__cta { opacity: 1; gap: 0.5rem; }

/* ═══════════════════════════════════════════════════════════════════════════
   GENERIC CARD GRID
   ═══════════════════════════════════════════════════════════════════════════ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.85rem;
}
.cards-grid--wide {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.1rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.3rem;
  transition: border-color var(--t) var(--ease), transform var(--t) var(--spring), box-shadow var(--t) var(--ease);
  text-decoration: none;
  color: inherit;
  display: block;
  position: relative;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  transform: scaleX(0);
  transition: transform 0.4s var(--ease);
}
.card:hover::after, .card:focus-visible::after { transform: scaleX(1); }

.card:hover, .card:focus-visible {
  border-color: var(--border-hi);
  transform: translateY(-2px);
  box-shadow: var(--card-shadow);
  outline: none;
}
.card--link:hover, .card--link:focus-visible { border-color: var(--cyan); }

.card__title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 0.25rem;
  transition: color var(--t) var(--ease);
}
.card--link:hover .card__title { color: var(--cyan); }
.card__sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ═══════════════════════════════════════════════════════════════════════════
   TIMELINE
   ═══════════════════════════════════════════════════════════════════════════ */
.timeline {
  display: flex;
  flex-direction: column;
  max-width: 860px;
  position: relative;
  gap: 0;
  padding-left: 0;
}

.timeline-track {
  position: absolute;
  left: 22px; top: 28px; bottom: 28px;
  width: 2px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  z-index: 0;
}

.timeline-track__fill {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 0%;
  background: linear-gradient(to bottom, var(--cyan), var(--purple));
  border-radius: 2px;
  transition: height 1.4s var(--ease);
}

.timeline-item {
  display: grid;
  grid-template-columns: 46px 1fr;
  align-items: start;
  gap: 0;
  padding-bottom: 1.25rem;
  text-decoration: none;
  color: inherit;
  position: relative;
  z-index: 1;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: '';
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border-hi);
  margin-top: 20px;
  justify-self: center;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease),
              box-shadow var(--t) var(--ease), transform var(--t) var(--spring);
  z-index: 2;
  position: relative;
}
.timeline-item:hover::before, .timeline-item:focus-visible::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px var(--cyan-dim), 0 0 14px var(--cyan-glow);
  transform: scale(1.25);
  outline: none;
}

.timeline-item__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease),
              box-shadow var(--t) var(--ease), background var(--t) var(--ease);
  position: relative;
  overflow: hidden;
}

.timeline-item__card::after {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--cyan), var(--purple));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s var(--ease);
  border-radius: 2px 0 0 2px;
}

.timeline-item:hover .timeline-item__card,
.timeline-item:focus-visible .timeline-item__card {
  border-color: var(--border-hi);
  transform: translateX(5px);
  box-shadow: var(--timeline-shadow);
  background: var(--bg-card-2);
  outline: none;
}

.timeline-item:hover .timeline-item__card::after,
.timeline-item:focus-visible .timeline-item__card::after {
  transform: scaleY(1);
}

.timeline-item__body { flex: 1; min-width: 0; }

.timeline-item__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-strong);
  line-height: 1.3;
  transition: color var(--t) var(--ease);
}
.timeline-item:hover .timeline-item__title { color: var(--cyan); }

.timeline-item__sub {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.timeline-item__badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid var(--timeline-border);
  border-radius: 6px;
  padding: 0.25rem 0.65rem;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SKILLS — two-column layout
   ═══════════════════════════════════════════════════════════════════════════ */
.skills-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.skills-block { margin-bottom: 2.25rem; }
.skills-block:last-child { margin-bottom: 0; }

.skills-block-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.skills-block-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ─── Skill bars ─── */
.skill-bars { display: flex; flex-direction: column; gap: 0.9rem; }

.skill-bar {
  display: grid;
  grid-template-columns: 115px 1fr 38px;
  align-items: center;
  gap: 0.75rem;
}
.skill-bar__name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.skill-bar__track {
  height: 4px;
  background: var(--track-bg);
  border-radius: 99px;
  overflow: hidden;
  position: relative;
}
.skill-bar__fill {
  height: 100%;
  border-radius: 99px;
  background: var(--fill-bg);
  width: 0;
  transition: width 1.1s var(--ease);
  position: relative;
}
.skill-bar__fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: var(--shimmer-gradient);
  animation: shimmer 2.5s ease-in-out infinite;
  animation-delay: 1.2s;
}
@keyframes shimmer {
  0%   { left: -60%; }
  100% { left: 120%; }
}
.skill-bar__pct {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: right;
}

/* ─── Skill chips ─── */
.skill-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.skill-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.95rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text);
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease), background var(--t) var(--ease), transform var(--t) var(--spring);
  cursor: default;
}
.skill-chip:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
  transform: translateY(-2px);
}
.skill-chip__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   GITHUB STATS
   ═══════════════════════════════════════════════════════════════════════════ */
.github-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.github-card--wide {
  grid-column: 1 / -1;
}

.github-card--streak img {
  height: auto;
  object-fit: unset;
}

.github-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--t) var(--ease), transform var(--t) var(--spring), box-shadow var(--t) var(--ease);
}
.github-card:hover {
  border-color: var(--border-hi);
  transform: translateY(-3px);
  box-shadow: var(--github-shadow);
}
.github-card img { width: 100%; height: auto; display: block; border-radius: 8px; }

/* ═══════════════════════════════════════════════════════════════════════════
   CONTACT
   ═══════════════════════════════════════════════════════════════════════════ */
#contact {
  background: var(--bg-2);
  position: relative;
  overflow: hidden;
}

#contact::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: var(--contact-vignette);
  pointer-events: none;
}

.contact-inner { max-width: 600px; position: relative; }
.contact-inner p { color: var(--text-muted); margin-bottom: 2rem; font-size: 1rem; }
.contact-links { display: flex; flex-wrap: wrap; gap: 0.9rem; }

/* ═══════════════════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════════════════ */
footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--bg);
  position: relative;
  z-index: 1;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SCROLL TO TOP
   ═══════════════════════════════════════════════════════════════════════════ */
.scroll-top {
  position: fixed;
  bottom: 1.5rem; right: 1.5rem;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-hi);
  color: var(--cyan);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t) var(--ease), transform var(--t) var(--spring), box-shadow var(--t) var(--ease);
  z-index: 50;
}
.scroll-top.visible { opacity: 1; pointer-events: auto; }
.scroll-top:hover {
  box-shadow: 0 0 20px var(--cyan-glow);
  transform: translateY(-3px) scale(1.05);
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE MEDIA QUERIES
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Tablet: 820px ── */
@media (max-width: 820px) {
  .skills-layout { grid-template-columns: 1fr; gap: 2rem; }
  .github-grid { grid-template-columns: 1fr 1fr; }
  .github-card--wide { grid-column: 1 / -1; }
}

/* ── Mobile: 768px ── */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  .menu-right {
    position: fixed;
    top: 0; right: -100%;
    width: min(300px, 90vw);
    height: 100dvh;
    background: var(--bg-card);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    flex-direction: column;
    align-items: flex-start;
    padding: calc(var(--header-h) + 2rem) 1.75rem 2.5rem;
    gap: 2rem;
    border-left: 1px solid var(--border);
    box-shadow: var(--mobile-shadow);
    transition: right 0.32s var(--ease);
    overflow-y: auto;
  }
  .menu-right.open { right: 0; }

  .menu-right::before {
    content: '';
    position: fixed;
    top: 0;
    right: min(300px, 90vw);
    width: 1px;
    height: 100dvh;
    background: linear-gradient(180deg, transparent, var(--cyan), transparent);
    opacity: 0;
    transition: opacity 0.32s var(--ease);
    pointer-events: none;
  }
  .menu-right.open::before { opacity: 0.5; }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.1rem;
    width: 100%;
    margin-right: 0;
  }

  .nav-links a {
    font-size: 0.9rem;
    padding: 0.6rem 0.75rem;
    width: 100%;
    border-radius: var(--radius);
    border: 1px solid transparent;
    color: var(--text-muted);
    font-family: var(--font-mono);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color var(--t) var(--ease), background var(--t) var(--ease), border-color var(--t) var(--ease);
  }
  .nav-links a::before {
    content: '>';
    color: var(--cyan);
    opacity: 0;
    font-size: 0.75rem;
    transition: opacity var(--t) var(--ease);
    flex-shrink: 0;
  }
  .nav-links a:hover,
  .nav-links a.active {
    color: var(--text-strong);
    background: var(--cyan-dim);
    border-color: var(--border);
  }
  .nav-links a:hover::before,
  .nav-links a.active::before { opacity: 1; }

  .header-controls {
    gap: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border);
    width: 100%;
    justify-content: flex-start;
  }

  .hero { padding-top: calc(var(--header-h) + 2.5rem); padding-bottom: 3.5rem; }
  .hero-stats { gap: 1.25rem; flex-wrap: wrap; }
  .hero-stat { min-width: calc(50% - 0.75rem); }

  .projects-grid { grid-template-columns: 1fr; }
  .cards-grid { grid-template-columns: 1fr 1fr; }
  .github-grid { grid-template-columns: 1fr; }
  .github-card--wide { grid-column: 1; }

  .skill-bar { grid-template-columns: 90px 1fr 32px; }
}

/* ── Small mobile: 540px ── */
@media (max-width: 540px) {
  .timeline-item__card { flex-direction: column; align-items: flex-start; }
  .timeline-item__badge { align-self: flex-start; }

  .hero-stats { gap: 0.75rem; }
  .hero-stat { min-width: calc(50% - 0.5rem); flex: 1 1 calc(50% - 0.5rem); }

  .cards-grid { grid-template-columns: 1fr; }

  .skill-bar { grid-template-columns: 80px 1fr 30px; gap: 0.5rem; }
  .skill-bar__name { font-size: 0.72rem; }
}

/* ── XS: 480px ── */
@media (max-width: 480px) {
  :root { --header-h: 56px; }

  .hero-title { font-size: clamp(1.7rem, 8vw, 2.4rem); }
  .hero-quote { font-size: 0.78rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; text-align: center; }

  .hero-stat { padding: 0.55rem 0.7rem; }
  .hero-stat__num { font-size: 1.35rem; }

  section { padding-top: 4rem; padding-bottom: 4rem; }
  .section-title { font-size: 1.3rem; margin-bottom: 1.75rem; }

  .about-badges { gap: 0.45rem; }
  .about-badge { font-size: 0.72rem; padding: 0.35rem 0.7rem; }

  .project-card { padding: 1.2rem; }
  .wordmark { font-size: 0.75rem; }

  .scroll-top { bottom: 1rem; right: 1rem; width: 38px; height: 38px; font-size: 0.85rem; }
}

/* ── Tiny: 360px ── */
@media (max-width: 360px) {
  .hero-stat { min-width: 100%; }
  .cards-grid--wide { grid-template-columns: 1fr; }
  .contact-links { flex-direction: column; }
  .contact-links .btn { width: 100%; justify-content: center; text-align: center; }
}