@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600&family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  /* High-Contrast Obsidian Dark Theme (Default) */
  --bg: #07090e;
  --bg-secondary: #0f172a;
  --surface: rgba(15, 23, 42, 0.92);
  --surface-hover: rgba(30, 41, 59, 0.95);
  --surface-soft: #1e293b;
  --text-heading: #ffffff;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --primary: #38bdf8;
  --primary-glow: rgba(56, 189, 248, 0.4);
  --secondary: #818cf8;
  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #6366f1 50%, #a855f7 100%);
  --accent-glow: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, transparent 70%);
  --border: rgba(255, 255, 255, 0.16);
  --border-hover: #38bdf8;
  --header-bg: rgba(11, 15, 25, 0.95);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  --glass-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
  --card-radius: 22px;
  --tag-bg: #1e293b;
  --tag-text: #f8fafc;
  --tag-border: #334155;
  --flagship-bg: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.85));
  --code-bg: #0d1322;
  --code-header-bg: #162035;
  --code-text: #f1f5f9;
  --code-title: #94a3b8;
}

[data-theme="light"] {
  /* High-Contrast Crisp Vibrant Light Theme */
  --bg: #f4f6fc;
  --bg-secondary: #e2e8f0;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-hover: rgba(255, 255, 255, 0.98);
  --surface-soft: #e2e8f0;
  --text-heading: #0f172a;
  --text: #1e293b;
  --muted: #475569;
  --primary: #0284c7;
  --primary-glow: rgba(2, 132, 199, 0.25);
  --secondary: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #7e22ce 100%);
  --accent-glow: radial-gradient(circle, rgba(2, 132, 199, 0.2) 0%, transparent 70%);
  --border: rgba(15, 23, 42, 0.14);
  --border-hover: #0284c7;
  --header-bg: rgba(255, 255, 255, 0.92);
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.12);
  --glass-shadow: 0 12px 35px 0 rgba(31, 38, 135, 0.08);
  --tag-bg: #e2e8f0;
  --tag-text: #0f172a;
  --tag-border: #cbd5e1;
  --flagship-bg: linear-gradient(135deg, rgba(241, 245, 249, 0.95), rgba(226, 232, 240, 0.9));
  --code-bg: #1e293b;
  --code-header-bg: #0f172a;
  --code-text: #f8fafc;
  --code-title: #cbd5e1;
}

* {
  box-sizing: border-box;
}

.skip-link {
  display: none !important;
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Ambient Canvas Background */
#ambient-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.9;
}

/* Gradient Text Utility */
.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Progress bar */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--accent-gradient);
  z-index: 100;
  box-shadow: 0 0 12px var(--primary);
}

.container {
  width: min(1160px, 92%);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* Floating Glass Dock Header */
.site-header {
  position: fixed;
  top: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  width: min(1120px, 94%);
  z-index: 50;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: var(--header-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--glass-shadow);
  transition: all 0.3s ease;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 1.5rem;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-family: "Outfit", sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: inline-block;
  box-shadow: 0 0 10px var(--primary);
  animation: pulse-glow 2s infinite alternate;
}

@keyframes pulse-glow {
  0% { transform: scale(1); box-shadow: 0 0 8px var(--primary); }
  100% { transform: scale(1.3); box-shadow: 0 0 16px var(--primary); }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.theme-toggle {
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.toggle-track {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 68px;
  height: 34px;
  border-radius: 999px;
  padding: 0 8px;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.toggle-icon {
  font-size: 0.95rem;
  line-height: 1;
  color: var(--text);
  z-index: 1;
}

.toggle-knob {
  position: absolute;
  left: 3px;
  top: 3px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-gradient);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="light"] .toggle-knob {
  transform: translateX(34px);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: color 0.2s ease;
  position: relative;
  padding: 0.3rem 0;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text);
  border-radius: 10px;
  font-size: 1.2rem;
  height: 38px;
  width: 38px;
  cursor: pointer;
}

/* Sections & Page Layout */
.section,
.hero {
  padding: 7.5rem 0 4rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.eyebrow {
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.85rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--accent-gradient);
  display: inline-block;
  border-radius: 2px;
}

h1, h2, h3 {
  font-family: "Outfit", sans-serif;
  letter-spacing: -0.02em;
  color: var(--text-heading);
}

h1 {
  font-size: clamp(2.5rem, 5.2vw, 4rem);
  line-height: 1.08;
  margin: 0.2rem 0 1.2rem;
  font-weight: 800;
}

h2 {
  font-size: 1.6rem;
  margin: 0 0 0.6rem;
  font-weight: 700;
}

.hero-text {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--muted);
  max-width: 65ch;
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.8rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.75rem;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 24px var(--primary-glow);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px var(--primary-glow);
  color: #ffffff;
}

.btn-secondary {
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface-soft);
  backdrop-filter: blur(16px);
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
  transform: translateY(-3px);
}

/* Hero Right Column: Code Playground & Portrait */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Interactive Machine Learning & Neural Network Moving Graphics Card */
.ml-graphics-card {
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1.5px solid var(--border);
  border-radius: 22px;
  padding: 1.25rem;
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.ml-graphics-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 16px 40px var(--primary-glow);
}

.ml-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.ml-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ml-live-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulse-dot 1.8s infinite alternate;
}

@keyframes pulse-dot {
  0% { transform: scale(0.9); opacity: 0.7; }
  100% { transform: scale(1.3); opacity: 1; }
}

.ml-title {
  font-family: "Outfit", sans-serif;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text-heading);
}

.ml-chip {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--primary);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Interactive Mode Controls */
.ml-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.85rem;
}

.ml-mode-btn {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.32rem 0.7rem;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s ease;
}

.ml-mode-btn:hover {
  background: var(--surface-hover);
  color: var(--text);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.ml-mode-btn.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 2px 10px var(--primary-glow);
}

.ml-mode-btn.impulse-btn {
  margin-left: auto;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  border: 1px solid #10b981;
}

.ml-mode-btn.impulse-btn:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

.ml-canvas-wrap {
  position: relative;
  width: 100%;
  height: 225px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

#ml-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.ml-scanline {
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent 0%, var(--primary-glow) 50%, transparent 100%);
  opacity: 0.45;
  animation: scan-horizontal 3.5s ease-in-out infinite;
  pointer-events: none;
}

@keyframes scan-horizontal {
  0% { transform: translateX(0); }
  100% { transform: translateX(200%); }
}

.ml-hud-overlay {
  position: absolute;
  bottom: 0.6rem;
  left: 0.75rem;
  right: 0.75rem;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.ml-hud-badge {
  font-family: "Fira Code", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text);
  background: var(--surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  padding: 0.2rem 0.6rem;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.loss-badge {
  color: #10b981;
}

.ml-footer-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.ml-stat-val {
  display: block;
  font-family: "Outfit", sans-serif;
  font-weight: 800;
  font-size: 0.88rem;
  color: var(--primary);
}

.ml-stat-lbl {
  display: block;
  font-size: 0.74rem;
  color: var(--muted);
  font-weight: 600;
}

.portrait-wrap {
  position: relative;
  width: 100%;
  max-width: 360px;
  margin-inline: auto;
  border-radius: 26px;
  padding: 6px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.5), rgba(99, 102, 241, 0.3));
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(16px);
}

.portrait-wrap::before {
  content: "";
  position: absolute;
  inset: -15px;
  border-radius: 36px;
  background: var(--accent-glow);
  z-index: -1;
  opacity: 0.85;
  filter: blur(18px);
}

.portrait {
  width: 100%;
  height: 100%;
  min-height: 380px;
  object-fit: cover;
  border-radius: 20px;
  display: block;
}

/* IDE Code Playground Window */
.code-playground {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--glass-shadow);
  font-family: "Fira Code", monospace;
  font-size: 0.88rem;
}

.code-header {
  background: var(--code-header-bg);
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.code-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.code-title {
  margin-left: auto;
  color: var(--code-title);
  font-size: 0.78rem;
  font-weight: 600;
}

.code-body {
  padding: 1.1rem 1.25rem;
  line-height: 1.75;
  color: var(--code-text);
}

.syntax-keyword { color: #f472b6; font-weight: 700; }
.syntax-var { color: #38bdf8; font-weight: 600; }
.syntax-string { color: #34d399; }
.syntax-comment { color: #94a3b8; font-style: italic; }

/* Status Row & Stats Grid */
.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.5rem;
}

.status-pill {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  backdrop-filter: blur(14px);
  border-radius: 999px;
  padding: 0.45rem 1rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
  padding: 1.3rem;
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(16px);
  border-radius: 20px;
  box-shadow: var(--glass-shadow);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-family: "Outfit", sans-serif;
  font-size: 1.9rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 700;
  margin-top: 0.3rem;
}

/* Flagship Project Spotlight Banner */
.flagship-banner {
  background: var(--flagship-bg);
  border: 1.5px solid var(--primary);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 2.2rem;
  margin-bottom: 2.5rem;
  box-shadow: 0 16px 40px var(--primary-glow);
  position: relative;
  overflow: hidden;
}

.flagship-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.flagship-banner h2 {
  font-size: 1.8rem;
  margin-bottom: 0.6rem;
  color: var(--text-heading);
}

.flagship-banner p {
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 75ch;
  margin-bottom: 1.4rem;
  font-weight: 500;
}

/* Project Search Toolbar & Filter Dock */
.project-toolbar {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 2.2rem;
}

.search-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-wrap {
  position: relative;
  flex: 1;
  min-width: 280px;
}

.search-wrap i {
  position: absolute;
  left: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 1.1rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 2.8rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(16px);
  color: var(--text);
  font-size: 0.98rem;
  font-family: inherit;
  font-weight: 600;
  outline: none;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.search-input::placeholder {
  color: var(--muted);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.count-badge {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--primary);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  padding: 0.45rem 1rem;
  border-radius: 999px;
  white-space: nowrap;
}

.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.filter-btn {
  padding: 0.65rem 1.35rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  backdrop-filter: blur(14px);
  color: var(--text);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.25s ease;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 18px var(--primary-glow);
}

/* Project Cards & Tech Tags */
.project-grid,
.skills-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1.6rem;
}

.project-card,
.skill-card,
.about-card,
.education-card,
.contact-item {
  background: var(--surface);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1.5px solid var(--border);
  border-radius: var(--card-radius);
  padding: 1.6rem;
  box-shadow: var(--glass-shadow);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}

.project-card:hover::before {
  opacity: 1;
}

.project-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.25rem;
  color: var(--text-heading);
}

.project-card p {
  font-size: 0.96rem;
  color: var(--muted);
  margin: 0 0 1.25rem;
  line-height: 1.65;
  flex-grow: 1;
  font-weight: 500;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.3rem;
}

.tag-pill {
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--tag-border);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: auto;
  color: var(--primary);
  text-decoration: none;
  font-weight: 800;
  font-size: 0.95rem;
  transition: gap 0.2s ease, color 0.2s ease;
}

.project-link:hover {
  gap: 0.75rem;
  color: var(--secondary);
}

/* Skills Page with High Contrast Tags */
.skills-cards .skill-card h2 {
  font-size: 1.2rem;
  margin-bottom: 0.9rem;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.skills-cards .skill-card h2 i {
  color: var(--primary);
}

.skill-list-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.5rem;
}

.skill-tag {
  font-size: 0.86rem;
  font-weight: 700;
  padding: 0.4rem 0.85rem;
  border-radius: 10px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  color: var(--tag-text);
}

/* Timeline Journey Roadmap (About Page) */
.timeline {
  position: relative;
  margin-top: 2rem;
  padding-left: 1.8rem;
  border-left: 2px dashed var(--border-hover);
}

.timeline-item {
  position: relative;
  margin-bottom: 1.8rem;
}

.timeline-dot {
  position: absolute;
  left: -2.35rem;
  top: 0.2rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-gradient);
  border: 3px solid var(--bg);
  box-shadow: 0 0 10px var(--primary);
}

.timeline-item h3 {
  margin: 0 0 0.2rem;
  font-size: 1.15rem;
  color: var(--text-heading);
}

.timeline-item span {
  font-size: 0.86rem;
  color: var(--primary);
  font-weight: 800;
}

.timeline-item p {
  margin: 0.4rem 0 0;
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 500;
}

/* Contact Items */
.contact-list {
  margin-top: 1.8rem;
  display: grid;
  gap: 1rem;
  max-width: 800px;
}

.contact-item {
  display: grid;
  grid-template-columns: 40px 140px 1fr auto;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
}

.contact-item i {
  font-size: 1.35rem;
  color: var(--primary);
}

.contact-label {
  color: var(--text);
  font-weight: 800;
}

.contact-value,
.contact-action {
  color: var(--muted);
  font-size: 0.96rem;
  font-weight: 600;
  text-decoration: none;
}

.contact-action:hover {
  color: var(--primary);
}

.copy-btn {
  margin-left: auto;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--primary);
  border-radius: 8px;
  padding: 0.38rem 0.85rem;
  font-weight: 800;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.copy-btn:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* Toast Notification */
.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface);
  backdrop-filter: blur(18px);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.7rem 1.3rem;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
  z-index: 60;
  font-weight: 700;
  font-size: 0.92rem;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Back to top button */
.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  height: 48px;
  width: 48px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  backdrop-filter: blur(16px);
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(12px);
  transition: all 0.25s ease;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  transform: translateY(-3px);
}

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.8rem 0 2.8rem;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
  position: relative;
  z-index: 1;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-contact-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-contact-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  transition: all 0.25s ease;
}

.footer-contact-links a:hover {
  color: var(--primary);
  background: rgba(56, 189, 248, 0.15);
}

/* Responsive Media Queries */
@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .site-header {
    width: 96%;
  }

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

@media (max-width: 760px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1.25rem 6%;
    border-radius: 20px;
    border: 1px solid var(--border);
    display: none;
    gap: 1rem;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .contact-item {
    grid-template-columns: 28px 1fr auto;
  }

  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
  }
}