/* ============================================================
   DESIGN TOKENS & CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* Warm Palette */
  --amber-50: #fff8e1;
  --amber-100: #ffecb3;
  --amber-200: #ffe082;
  --amber-300: #ffd54f;
  --amber-400: #ffca28;
  --amber-500: #ffc107;
  --amber-600: #ffb300;
  --amber-700: #ffa000;
  --amber-800: #ff8f00;
  --amber-900: #ff6f00;

  --terracotta: #c97b5a;
  --burnt-sienna: #d4885a;
  --warm-gold: #e6a54a;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Container */
  --container-max: 1200px;
  --nav-height: 64px;
}

/* ============================================================
   THEME: DARK (default)
   ============================================================ */
[data-theme="dark"] {
  --bg-primary: #1a1410;
  --bg-secondary: #231e18;
  --bg-tertiary: #2d2620;
  --bg-card: rgba(45, 38, 32, 0.6);
  --bg-glass: rgba(35, 30, 24, 0.7);

  --text-primary: #f5ebe0;
  --text-secondary: #bfb0a0;
  --text-muted: #8a7a6a;

  --accent: #e6a54a;
  --accent-soft: rgba(230, 165, 74, 0.12);
  --accent-hover: #f0b45a;
  --accent-glow: rgba(230, 165, 74, 0.25);

  --border: rgba(191, 176, 160, 0.1);
  --border-hover: rgba(191, 176, 160, 0.2);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 60px rgba(230, 165, 74, 0.08);

  --nav-bg: rgba(26, 20, 16, 0.85);

  --timeline-line: rgba(230, 165, 74, 0.15);
  --timeline-dot: #e6a54a;

  color-scheme: dark;
}

/* ============================================================
   THEME: LIGHT
   ============================================================ */
[data-theme="light"] {
  --bg-primary: #fdf6ee;
  --bg-secondary: #f7efe4;
  --bg-tertiary: #f0e6d8;
  --bg-card: rgba(255, 252, 248, 0.85);
  --bg-glass: rgba(253, 246, 238, 0.75);

  --text-primary: #2c1e10;
  --text-secondary: #5c4a38;
  --text-muted: #8a7a6a;

  --accent: #c97b3a;
  --accent-soft: rgba(201, 123, 58, 0.1);
  --accent-hover: #b06a2a;
  --accent-glow: rgba(201, 123, 58, 0.15);

  --border: rgba(44, 30, 16, 0.08);
  --border-hover: rgba(44, 30, 16, 0.15);

  --shadow-sm: 0 1px 3px rgba(44, 30, 16, 0.06);
  --shadow-md: 0 4px 20px rgba(44, 30, 16, 0.08);
  --shadow-lg: 0 8px 40px rgba(44, 30, 16, 0.1);
  --shadow-glow: 0 0 60px rgba(201, 123, 58, 0.06);

  --nav-bg: rgba(253, 246, 238, 0.88);

  --timeline-line: rgba(201, 123, 58, 0.2);
  --timeline-dot: #c97b3a;

  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  overflow-x: hidden;
}

/* Subtle noise texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
}

/* Cursor glow (only on larger screens) */
.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  opacity: 0;
}

.cursor-glow.active {
  opacity: 1;
}

::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-hover);
}

/* Firefox */
html {
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-primary);
}

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

ul,
ol {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.hide-mobile {
  display: inline;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
}

.logo-bracket {
  color: var(--accent);
  font-weight: 400;
}

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

.nav-links {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: var(--radius-full);
  transition: transform var(--transition-spring);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

[data-theme="dark"] #theme-icon-sun {
  display: flex;
}

[data-theme="dark"] #theme-icon-moon {
  display: none;
}

[data-theme="light"] #theme-icon-sun {
  display: none;
}

[data-theme="light"] #theme-icon-moon {
  display: flex;
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
}

.nav-hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-base);
}

.nav-hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  z-index: 999;
  padding: var(--space-lg) var(--space-xl);
  transform: translateY(-110%);
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
  display: none;
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-md) var(--space-lg);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + var(--space-3xl)) var(--space-xl) var(--space-3xl);
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: 15%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: glowPulse 6s ease-in-out infinite alternate;
}

@keyframes glowPulse {
  0% {
    opacity: 0.5;
    transform: translateX(-50%) scale(0.9);
  }

  100% {
    opacity: 1;
    transform: translateX(-50%) scale(1.1);
  }
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: var(--radius-full);
  opacity: 0;
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0% {
    opacity: 0;
    transform: translateY(0) scale(0);
  }

  10% {
    opacity: 0.6;
    transform: translateY(-20px) scale(1);
  }

  90% {
    opacity: 0.3;
  }

  100% {
    opacity: 0;
    transform: translateY(-400px) scale(0.3);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-greeting {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.greeting-line {
  width: 40px;
  height: 2px;
  background: var(--accent);
  border-radius: var(--radius-full);
}

.greeting-text {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.hero-name {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-lg);
}

.hero-name-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--terracotta) 50%, var(--burnt-sienna) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: var(--space-lg);
  letter-spacing: 0.02em;
  min-height: 1.6em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-4xl);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent);
  color: #1a1410;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 30px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1.5px solid var(--border-hover);
  color: var(--text-primary);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}


/* ============================================================
   SECTIONS (shared)
   ============================================================ */
.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-soft);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-top: var(--space-md);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.about-text p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.85;
  text-align: justify;
}

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

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.about-bottom {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
  align-items: stretch;
}

.github-chart-container {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.github-chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2xl);
}

.github-chart-title {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.github-chart-title i {
  font-size: 1rem;
  color: var(--text-muted);
}

.github-chart-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.github-chart-count.loaded {
  opacity: 1;
}

.github-chart-img {
  width: 100%;
  height: auto;
  transition: filter var(--transition-base);
}

[data-theme="dark"] .github-chart-img {
  /* Invert white to black, flip hue so orange stays orange, dim slightly */
  filter: invert(1) hue-rotate(180deg) brightness(1.2);
}

/* Terminal Card */
.terminal-card {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

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

.terminal-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
}

.dot-red {
  background: #e85c5c;
}

.dot-yellow {
  background: #e6b94a;
}

.dot-green {
  background: #5ec269;
}

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.9;
}

.terminal-line {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.terminal-prompt {
  color: var(--accent);
  font-weight: 600;
  user-select: none;
}

.terminal-cmd {
  color: var(--text-primary);
}

.terminal-output {
  color: var(--text-muted);
  padding-left: calc(var(--space-sm) + 0.6em);
}

.terminal-cursor {
  color: var(--accent);
  animation: cursorBlink 1s step-end infinite;
}

@keyframes cursorBlink {

  0%,
  50% {
    opacity: 1;
  }

  51%,
  100% {
    opacity: 0;
  }
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  backdrop-filter: blur(10px);
  position: relative;
}

.stat-card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: var(--border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  transition: background 0.4s ease;
  pointer-events: none;
}

.stat-card:hover::before {
  background: conic-gradient(from var(--border-angle, 0deg), transparent 30%, var(--accent) 50%, transparent 70%);
  animation: rotateBorder 2.5s linear infinite;
}

.stat-card:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  display: block;
  line-height: 1;
  margin-bottom: 2px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ============================================================
   EXPERIENCE / TIMELINE
   ============================================================ */
.timeline {
  position: relative;
  max-width: 850px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--timeline-line);
  border-radius: var(--radius-full);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-2xl);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -36px;
  top: 28px;
  width: 14px;
  height: 14px;
  border-radius: var(--radius-full);
  background: var(--bg-primary);
  border: 3px solid var(--timeline-dot);
  z-index: 2;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.timeline-item:hover .timeline-marker {
  background: var(--timeline-dot);
  box-shadow: 0 0 0 6px var(--accent-soft);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  backdrop-filter: blur(10px);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
  cursor: pointer;
}

.timeline-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  transform: translateX(6px);
}

.timeline-header-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.timeline-chevron {
  color: var(--text-muted);
  font-size: 1.4rem;
  transition: transform var(--transition-base), color var(--transition-base);
}

.timeline-card:hover .timeline-chevron {
  animation: chevronPulse 2s ease-in-out infinite;
}

@keyframes chevronPulse {

  0%,
  100% {
    color: var(--text-muted);
    filter: drop-shadow(0 0 0px transparent);
  }

  50% {
    color: var(--accent);
    filter: drop-shadow(0 0 6px var(--accent));
  }
}

.timeline-card.expanded .timeline-chevron {
  transform: rotate(180deg);
  color: var(--accent);
  animation: none;
}

.timeline-expand {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.4s ease, margin 0.4s ease;
}

.timeline-card.expanded .timeline-expand {
  max-height: 800px;
  opacity: 1;
  margin-top: var(--space-md);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}

.timeline-role {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.timeline-company {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  white-space: nowrap;
  font-weight: 500;
  padding-top: 2px;
}

.timeline-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
  letter-spacing: 0.03em;
}

.timeline-details {
  list-style: none;
  margin-bottom: var(--space-md);
}

.timeline-details li {
  position: relative;
  padding-left: var(--space-xl);
  margin-bottom: var(--space-sm);
  font-size: 0.935rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.timeline-details li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.9rem;
}

.timeline-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.timeline-tech span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.timeline-tech span:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl);
}

.project-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid transparent;
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: var(--border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  transition: background 0.4s ease;
  z-index: 0;
  pointer-events: none;
}

.project-card:hover::before {
  background: conic-gradient(from var(--border-angle, 0deg), transparent 30%, var(--accent) 50%, transparent 70%);
  animation: rotateBorder 2.5s linear infinite;
}

.project-card:hover {
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-8px);
}

.project-card-glow {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at center, var(--accent-glow) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
  z-index: 0;
}

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



.project-card-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 0.6s ease;
  filter: blur(2px) brightness(0.4);
  z-index: 0;
}

.project-card:hover .project-card-bg {
  opacity: 0.35;
}

.project-card-content {
  position: relative;
  z-index: 1;
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  flex: 1;
  height: 100%;
}

.project-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: transparent;
  font-size: 1.5rem;
  margin-bottom: var(--space-xl);
  transition: background var(--transition-base), transform var(--transition-base), color var(--transition-base);
}

.project-card:hover .project-icon {
  background: var(--accent);
  color: var(--bg-primary);
  transform: scale(1.1) rotate(-5deg);
}

.project-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.project-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: var(--space-lg);
}

.project-desc {
  font-size: 0.935rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-md);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
}

.project-tags span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.project-tags span:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.project-links {
  display: flex;
  gap: var(--space-md);
  margin-top: auto;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.project-link:hover {
  background: var(--accent-soft);
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  backdrop-filter: blur(10px);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
  overflow: hidden;
}

.skill-group:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.skill-group.certifications {
  grid-column: 1 / -1;
}

.skill-group-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  color: var(--accent);
  font-size: 1.1rem;
}

.skill-group-header h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.skill-pill {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.skill-pill:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

.cert-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
  gap: var(--space-lg);
}

.cert-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.cert-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.cert-card-info {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.cert-card-info i {
  color: var(--accent);
  font-size: 1.5rem;
}

.cert-name {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.cert-issuer {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.cert-verify {
  align-self: flex-end;
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.cert-card:hover .cert-verify {
  color: var(--accent);
}

/* ============================================================
   EDUCATION
   ============================================================ */
.edu-card {
  max-width: 750px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid transparent;
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-3xl);
  display: flex;
  gap: var(--space-xl);
  align-items: flex-start;
  backdrop-filter: blur(10px);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  position: relative;
}

.edu-card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: var(--border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  transition: background 0.4s ease;
}

.edu-card:hover::before {
  background: conic-gradient(from var(--border-angle, 0deg), transparent 30%, var(--accent) 50%, transparent 70%);
  animation: rotateBorder 2.5s linear infinite;
}

.edu-card:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.edu-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.5rem;
  flex-shrink: 0;
}

.edu-school {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.edu-location {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.edu-degree {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.edu-meta {
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.edu-meta span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 500;
}

.edu-highlights {
  list-style: none;
  padding: 0;
  margin-top: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.edu-highlights li {
  position: relative;
  padding-left: 1.2em;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.edu-highlights li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.85rem;
}

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

/* ============================================================
   CONTACT
   ============================================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-3xl);
  align-items: stretch;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  justify-content: space-between;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  backdrop-filter: blur(10px);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-md);
  position: relative;
  flex: 1;
  overflow: visible;
}

.contact-card:hover {
  box-shadow: var(--shadow-glow);
  transform: translateX(6px);
  border-color: var(--accent);
}

.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.2rem;
  flex-shrink: 0;
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
}

.contact-card:hover .contact-card-icon {
  background: var(--accent);
  color: var(--bg-primary);
  transform: scale(1.1);
}

.contact-card-text {
  display: flex;
  flex-direction: column;
}

.contact-card-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.contact-card-value {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  word-break: break-all;
}

.form-status {
  font-size: 0.9rem;
  margin-top: var(--space-md);
  text-align: center;
  font-weight: 500;
}

.form-status.success {
  color: #5ec269;
}

.form-status.error {
  color: #e85c5c;
}

@media (max-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-socials {
  display: flex;
  gap: var(--space-sm);
}

.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.15rem;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.footer-socials a:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

/* ============================================================
   REVEAL ANIMATIONS
   ============================================================ */
.reveal-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1) var(--delay, 0s),
    transform 0.7s cubic-bezier(0.4, 0, 0.2, 1) var(--delay, 0s);
}

.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .about-bottom {
    flex-direction: column;
  }

  .about-stats {
    max-width: 480px;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
  }

  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .mobile-menu {
    display: block;
  }

  .hero-name {
    font-size: clamp(2.5rem, 10vw, 3.5rem);
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hide-mobile {
    display: none;
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  .section-header {
    margin-bottom: var(--space-2xl);
  }

  .container {
    padding: 0 var(--space-lg);
  }

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

  .project-card-content {
    padding: var(--space-xl);
  }

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

  .skill-group {
    padding: var(--space-lg) var(--space-xl);
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline-marker {
    left: -26px;
    width: 12px;
    height: 12px;
  }

  .timeline-card {
    padding: var(--space-lg);
  }

  .timeline-header {
    flex-direction: column;
  }

  .edu-card {
    flex-direction: column;
    padding: var(--space-xl);
  }

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

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

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr;
  }

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

  .cert-list {
    flex-direction: column;
    gap: var(--space-sm);
  }

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

/* ============================================================
   NEW FEATURES (Scroll Progress & Toast)
   ============================================================ */

/* Scroll Progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  width: 0%;
  z-index: 9999;
  box-shadow: 0 0 10px var(--accent);
  transition: width 0.1s ease-out;
}

/* Toast */
.toast {
  position: fixed;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  border: 1px solid var(--accent);
  color: var(--text-primary);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 500;
  opacity: 0;
  visibility: hidden;
  z-index: 9999;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  backdrop-filter: blur(10px);
  transition: all var(--transition-spring);
}

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

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: var(--space-2xl);
  right: var(--space-2xl);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 99;
}

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

.back-to-top:hover {
  background: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

/* ============================================================
   TRAVELING BORDER ANIMATION
   ============================================================ */
@property --border-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@keyframes rotateBorder {
  to {
    --border-angle: 360deg;
  }
}

/* ============================================================
   CONTACT FORM
   ============================================================ */
.contact-form {
  display: flex;
  flex-direction: column;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.form-row .form-group {
  margin-bottom: 0;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  outline: none;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-submit {
  width: 100%;
  justify-content: center;
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}