/* ================================================
   HICHEM TELLI — GITHUB PAGE
   style.css
   ================================================ */

/* ─── CUSTOM PROPERTIES ─── */
:root {
  --color-bg: #080d1a;
  --color-bg-alt: #0d1628;
  --color-surface: #111c35;
  --color-surface-2: #162040;
  --color-border: rgba(100, 140, 255, 0.12);
  --color-border-hover: rgba(100, 160, 255, 0.35);

  --color-primary: #4f8eff;
  --color-primary-bright: #6fa8ff;
  --color-accent: #a855f7;
  --color-accent-2: #06d6a0;
  --color-accent-3: #ff6b6b;

  --gradient-primary: linear-gradient(135deg, #4f8eff 0%, #a855f7 100%);
  --gradient-hero: linear-gradient(135deg, #0a1628 0%, #161240 50%, #0a1a2e 100%);
  --gradient-card: linear-gradient(145deg, rgba(79, 142, 255, 0.06) 0%, rgba(168, 85, 247, 0.04) 100%);

  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;

  --shadow-glow: 0 0 40px rgba(79, 142, 255, 0.2);
  --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 8px 50px rgba(79, 142, 255, 0.25);

  --nav-height: 70px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: #c8d8f8;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

img {
  display: block;
  max-width: 100%;
}

/* ─── PARTICLE CANVAS ─── */
#particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.45;
}

/* ─── UTILITY ─── */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── NAVBAR ─── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: var(--transition);
}

#navbar.scrolled {
  background: rgba(8, 13, 26, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.5);
}

.nav-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  align-items: center;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.875rem;
  color: rgba(200, 216, 248, 0.75);
  transition: var(--transition);
  letter-spacing: 0.01em;
}

.nav-link:hover {
  color: #fff;
  background: rgba(79, 142, 255, 0.12);
}

.nav-cta {
  background: var(--gradient-primary) !important;
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 50px;
  font-weight: 600;
}

.nav-cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(79, 142, 255, 0.4);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #c8d8f8;
  border-radius: 2px;
  transition: var(--transition);
}

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

.hero-bg-image {
  position: absolute;
  inset: 0;
  background: url('hero_bg.png') center/cover no-repeat;
  opacity: 0.35;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  opacity: 0.75;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: 0 24px;
  animation: heroFadeIn 1s ease-out;
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 214, 160, 0.1);
  border: 1px solid rgba(6, 214, 160, 0.25);
  color: #06d6a0;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: #06d6a0;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.5;
    transform: scale(0.8);
  }
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
}

.name-first {
  display: block;
  color: #e8f0ff;
}

.name-last {
  display: block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title-row {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
  color: var(--color-primary-bright);
  margin-bottom: 20px;
  min-height: 1.6em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.hero-title-text {
  color: #a5c0ff;
}

.cursor-blink {
  color: var(--color-primary);
  animation: blink 1s step-end infinite;
  font-weight: 300;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.hero-desc {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: rgba(200, 216, 248, 0.7);
  margin-bottom: 36px;
  line-height: 1.6;
}

.hero-desc strong {
  color: #fff;
  font-weight: 600;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 36px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px 32px;
  backdrop-filter: blur(10px);
  display: inline-flex;
}

.stat-item {
  text-align: center;
  padding: 0 28px;
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  font-size: 0.72rem;
  color: rgba(200, 216, 248, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
  display: block;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  cursor: pointer;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 24px rgba(79, 142, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(79, 142, 255, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--color-border);
  color: #c8d8f8;
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(79, 142, 255, 0.15);
  border-color: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

.hero-socials {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  color: rgba(200, 216, 248, 0.6);
  font-size: 0.95rem;
  transition: var(--transition);
}

.social-icon:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(79, 142, 255, 0.4);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
  color: rgba(200, 216, 248, 0.4);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  animation: fadeInUp 1.5s ease-out 0.5s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid rgba(200, 216, 248, 0.3);
  border-bottom: 2px solid rgba(200, 216, 248, 0.3);
  transform: rotate(45deg);
  animation: scrollBounce 1.5s ease-in-out infinite;
}

@keyframes scrollBounce {

  0%,
  100% {
    transform: rotate(45deg) translateY(0);
  }

  50% {
    transform: rotate(45deg) translateY(5px);
  }
}

/* ─── SECTIONS ─── */
.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

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

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-primary-bright);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 12px;
  padding: 4px 14px;
  border-radius: 50px;
  background: rgba(79, 142, 255, 0.1);
  border: 1px solid rgba(79, 142, 255, 0.2);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: #e8f0ff;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.section-subtitle {
  color: rgba(200, 216, 248, 0.55);
  font-size: 0.95rem;
}

.scholar-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary-bright);
  font-weight: 500;
  border-bottom: 1px solid rgba(79, 142, 255, 0.3);
  padding-bottom: 2px;
  transition: var(--transition);
}

.scholar-link:hover {
  color: #fff;
  border-color: #fff;
}

/* ─── ABOUT ─── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-lead {
  font-size: 1.1rem;
  color: #d0e0f8;
  margin-bottom: 20px;
  line-height: 1.75;
}

.about-text p {
  color: rgba(200, 216, 248, 0.75);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-text strong {
  color: #c8d8f8;
  font-weight: 600;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 32px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(79, 142, 255, 0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: rgba(200, 216, 248, 0.75);
  transition: var(--transition);
}

.highlight-item:hover {
  background: rgba(79, 142, 255, 0.12);
  border-color: rgba(79, 142, 255, 0.3);
}

.highlight-item i {
  color: var(--color-primary-bright);
  width: 14px;
  font-size: 0.8rem;
}

.about-visual {
  position: relative;
}

.about-card-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.profile-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  backdrop-filter: blur(20px);
  transition: var(--transition);
}

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

.profile-avatar {
  position: relative;
  flex-shrink: 0;
}

.avatar-initials {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}

.avatar-ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--gradient-primary) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  animation: ringRotate 4s linear infinite;
  opacity: 0.5;
}

@keyframes ringRotate {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.profile-info h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: #e8f0ff;
  margin-bottom: 4px;
}

.profile-info p {
  font-size: 0.85rem;
  color: rgba(200, 216, 248, 0.6);
  margin-bottom: 6px;
}

.profile-location {
  font-size: 0.78rem;
  color: var(--color-primary-bright);
  display: flex;
  align-items: center;
  gap: 4px;
}

.research-focus-card {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.08) 0%, rgba(79, 142, 255, 0.06) 100%);
  border: 1px solid rgba(168, 85, 247, 0.2);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.research-focus-card:hover {
  border-color: rgba(168, 85, 247, 0.4);
  transform: translateY(-3px);
  box-shadow: 0 8px 40px rgba(168, 85, 247, 0.2);
}

.research-focus-card h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #a855f7;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.research-focus-card p {
  font-size: 0.95rem;
  color: #c8d8f8;
  margin-bottom: 14px;
  line-height: 1.6;
}

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

.focus-tags span {
  font-size: 0.72rem;
  background: rgba(168, 85, 247, 0.15);
  color: #c895f7;
  border: 1px solid rgba(168, 85, 247, 0.3);
  padding: 3px 10px;
  border-radius: 50px;
}

/* ─── RESEARCH GRID ─── */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.research-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  transition: var(--transition);
  overflow: hidden;
}

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

.research-card.featured {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(79, 142, 255, 0.1) 0%, rgba(168, 85, 247, 0.08) 100%);
  border-color: rgba(79, 142, 255, 0.25);
}

.research-card.featured:hover {
  border-color: rgba(79, 142, 255, 0.5);
  box-shadow: 0 8px 50px rgba(79, 142, 255, 0.25);
}

.research-card-glow {
  position: absolute;
  top: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(79, 142, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.research-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(79, 142, 255, 0.12);
  border: 1px solid rgba(79, 142, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--color-primary-bright);
  margin-bottom: 16px;
}

.research-card.featured .research-icon {
  background: var(--gradient-primary);
  border: none;
  color: #fff;
  box-shadow: 0 4px 20px rgba(79, 142, 255, 0.4);
}

.research-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--gradient-primary);
  color: #fff;
  padding: 4px 10px;
  border-radius: 50px;
}

.research-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: #e8f0ff;
  margin-bottom: 10px;
  line-height: 1.3;
}

.research-card p {
  font-size: 0.86rem;
  color: rgba(200, 216, 248, 0.65);
  line-height: 1.7;
  margin-bottom: 16px;
}

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

.research-tags span {
  font-size: 0.7rem;
  color: var(--color-primary-bright);
  background: rgba(79, 142, 255, 0.1);
  border: 1px solid rgba(79, 142, 255, 0.2);
  padding: 3px 10px;
  border-radius: 50px;
}

/* ─── PUBLICATIONS ─── */
.pub-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pub-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  transition: var(--transition);
  overflow: hidden;
}

.pub-card:hover {
  border-color: var(--color-border-hover);
  transform: translateX(4px);
  box-shadow: -4px 0 0 var(--color-primary), var(--shadow-card);
}

.featured-pub {
  background: linear-gradient(135deg, rgba(79, 142, 255, 0.1) 0%, rgba(168, 85, 247, 0.08) 100%);
  border-color: rgba(79, 142, 255, 0.3);
}

.featured-pub:hover {
  border-color: rgba(79, 142, 255, 0.55);
  box-shadow: -4px 0 0 var(--color-primary), 0 8px 50px rgba(79, 142, 255, 0.2);
}

.pub-card-accent {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-primary);
  border-radius: 3px 0 0 3px;
}

.pub-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.pub-venue {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 50px;
}

.pub-venue.eccv {
  background: rgba(79, 142, 255, 0.15);
  color: var(--color-primary-bright);
  border: 1px solid rgba(79, 142, 255, 0.3);
}

.pub-venue.conference {
  background: rgba(168, 85, 247, 0.15);
  color: #c895f7;
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.pub-venue.journal {
  background: rgba(6, 214, 160, 0.12);
  color: #06d6a0;
  border: 1px solid rgba(6, 214, 160, 0.3);
}

.pub-venue.workshop {
  background: rgba(255, 107, 107, 0.12);
  color: #ff9090;
  border: 1px solid rgba(255, 107, 107, 0.3);
}

.pub-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(200, 216, 248, 0.45);
  font-weight: 500;
}

.pub-badge {
  font-size: 0.67rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border-radius: 50px;
}

.new-badge {
  background: rgba(6, 214, 160, 0.15);
  color: #06d6a0;
  border: 1px solid rgba(6, 214, 160, 0.3);
}

.pub-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: #e8f0ff;
  margin-bottom: 6px;
  line-height: 1.35;
}

.pub-authors {
  font-size: 0.82rem;
  color: rgba(200, 216, 248, 0.5);
  margin-bottom: 12px;
}

.pub-authors strong {
  color: var(--color-primary-bright);
}

.pub-abstract {
  font-size: 0.86rem;
  color: rgba(200, 216, 248, 0.65);
  line-height: 1.75;
  margin-bottom: 16px;
}

.pub-abstract em {
  color: #c8d8f8;
  font-style: italic;
}

.pub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.pub-tags span {
  font-size: 0.7rem;
  background: rgba(79, 142, 255, 0.08);
  color: rgba(200, 216, 248, 0.6);
  border: 1px solid rgba(79, 142, 255, 0.15);
  padding: 3px 10px;
  border-radius: 50px;
}

.pub-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-primary-bright);
  border-bottom: 1px solid rgba(79, 142, 255, 0.3);
  padding-bottom: 1px;
  transition: var(--transition);
}

.pub-link:hover {
  color: #fff;
  border-color: #fff;
}

.pub-link.disabled {
  color: rgba(200, 216, 248, 0.3);
  border-color: transparent;
  cursor: default;
}

/* ─── TIMELINE ─── */
.timeline {
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  padding-left: 48px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 60%, transparent 100%);
  opacity: 0.3;
}

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

.timeline-dot {
  position: absolute;
  left: -40px;
  top: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  z-index: 1;
}

.timeline-connector {
  display: none;
}

.dot-inner {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  background: var(--color-bg-alt);
  flex-shrink: 0;
}

.timeline-item.active .dot-inner {
  background: var(--color-primary);
  box-shadow: 0 0 16px rgba(79, 142, 255, 0.6);
}

.timeline-card {
  display: block;
  width: 100%;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  box-sizing: border-box;
}

.timeline-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-hover);
}

.timeline-item.active .timeline-card {
  border-color: rgba(79, 142, 255, 0.25);
  background: linear-gradient(135deg, rgba(79, 142, 255, 0.08) 0%, rgba(168, 85, 247, 0.04) 100%);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.timeline-company {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.company-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary-bright);
}

.company-location {
  font-size: 0.75rem;
  color: rgba(200, 216, 248, 0.45);
  display: flex;
  align-items: center;
  gap: 4px;
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(200, 216, 248, 0.4);
  white-space: nowrap;
}

.timeline-role {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: #e8f0ff;
  margin-bottom: 10px;
}

.timeline-desc {
  font-size: 0.86rem;
  color: rgba(200, 216, 248, 0.65);
  line-height: 1.75;
  margin-bottom: 20px;
}

.timeline-milestones {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-left: 2px solid rgba(79, 142, 255, 0.2);
  padding-left: 20px;
  margin-top: 16px;
}

.milestone {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 12px;
  align-items: start;
}

.milestone-period {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-primary-bright);
  font-weight: 500;
  padding-top: 2px;
}

.milestone-content strong {
  display: block;
  font-size: 0.85rem;
  color: #c8d8f8;
  font-weight: 600;
  margin-bottom: 3px;
}

.milestone-content p {
  font-size: 0.8rem;
  color: rgba(200, 216, 248, 0.55);
  line-height: 1.6;
}

.timeline-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.timeline-tech span {
  font-size: 0.7rem;
  background: rgba(79, 142, 255, 0.1);
  color: rgba(200, 216, 248, 0.6);
  border: 1px solid rgba(79, 142, 255, 0.2);
  padding: 3px 10px;
  border-radius: 50px;
}

/* ─── SKILLS ─── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-group {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.skill-group:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.skill-group-title {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary-bright);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.skill-group-title i {
  font-size: 0.8rem;
}

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

.pill {
  font-size: 0.75rem;
  color: rgba(200, 216, 248, 0.7);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  padding: 5px 12px;
  border-radius: 50px;
  transition: var(--transition);
  cursor: default;
}

.pill:hover {
  background: rgba(79, 142, 255, 0.12);
  border-color: rgba(79, 142, 255, 0.3);
  color: #c8d8f8;
}

/* ─── CONTACT GRID ─── */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  overflow: hidden;
}

.contact-card a {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 28px 20px;
  gap: 10px;
  height: 100%;
}

.contact-card i {
  font-size: 1.8rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-card h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: #e8f0ff;
}

.contact-card p {
  font-size: 0.78rem;
  color: rgba(200, 216, 248, 0.45);
  line-height: 1.5;
}

.contact-card:hover {
  border-color: rgba(79, 142, 255, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(79, 142, 255, 0.2);
  background: linear-gradient(135deg, rgba(79, 142, 255, 0.1) 0%, rgba(168, 85, 247, 0.07) 100%);
}

/* ─── FOOTER ─── */
.footer {
  background: #050a14;
  border-top: 1px solid var(--color-border);
  padding: 28px 0;
  position: relative;
  z-index: 1;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-name {
  font-size: 0.85rem;
  color: rgba(200, 216, 248, 0.6);
}

.footer-copy {
  font-size: 0.78rem;
  color: rgba(200, 216, 248, 0.35);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 0.8rem;
  color: rgba(200, 216, 248, 0.45);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-primary-bright);
}

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .research-card.featured {
    grid-column: span 2;
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(8, 13, 26, 0.98);
    backdrop-filter: blur(20px);
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
    z-index: 999;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 12px;
    padding: 16px 20px;
  }

  .stat-divider {
    display: none;
  }

  .stat-item {
    padding: 0 16px;
  }

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

  .research-card.featured {
    grid-column: span 1;
  }

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

  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .timeline {
    padding-left: 32px;
  }

  .timeline::before {
    left: 12px;
  }

  .timeline-dot {
    left: -28px;
  }

  .dot-inner {
    width: 12px;
    height: 12px;
  }

  .milestone {
    grid-template-columns: 70px 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 70px 0;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
}