/* ==========================================================================
   Zelio Inspired Developer Portfolio - CSS Style System
   Theme: Modern Developer Dark with Neon Accents (#A8FF53) & Glassmorphism
   ========================================================================== */

:root {
  /* Colors - Dark Theme (Default) */
  --bg-primary: #0e0e10;
  --bg-secondary: #141416;
  --bg-card: #19191d;
  --bg-card-subtle: #222228;
  --bg-glass: rgba(25, 25, 29, 0.75);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(168, 255, 83, 0.3);
  --border-glow: rgba(168, 255, 83, 0.15);

  --accent-primary: #a8ff53;       /* Zelio signature lime neon */
  --accent-primary-rgb: 168, 255, 83;
  --accent-hover: #93e642;
  --accent-soft: rgba(168, 255, 83, 0.12);
  --accent-cyan: #38bdf8;
  --accent-purple: #c084fc;

  --text-main: #f4f4f5;
  --text-muted: #8f8f96;
  --text-dim: #63636e;
  --text-code: #a8ff53;

  /* Typography */
  --font-main: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Layout & Radii */
  --container-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 25px rgba(168, 255, 83, 0.2);
}

/* Light Theme Overrides */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-hover: rgba(77, 172, 0, 0.4);
  --border-glow: rgba(77, 172, 0, 0.15);

  --accent-primary: #4dac00;
  --accent-primary-rgb: 77, 172, 0;
  --accent-hover: #3d8800;
  --accent-soft: rgba(77, 172, 0, 0.1);

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --text-code: #3d8800;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 25px rgba(77, 172, 0, 0.15);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Background Subtle Grid & Mesh Glow */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(168, 255, 83, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(56, 189, 248, 0.03) 0%, transparent 40%),
    linear-gradient(to right, var(--border-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-color) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  opacity: 0.8;
  pointer-events: none;
  z-index: -1;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-main);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.25;
}

p {
  color: var(--text-muted);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-fast);
}

ul {
  list-style: none;
}

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

button, input, textarea {
  font-family: inherit;
  color: inherit;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
  background: none;
}

/* ==========================================================================
   Utility Classes & Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-full);
  color: var(--accent-primary);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-mono);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.section-tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 8px var(--accent-primary);
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 50px;
}

.section-header h2 {
  font-size: 2.25rem;
  margin-bottom: 12px;
}

.section-header h2 span {
  color: var(--text-muted);
  font-weight: 400;
}

.section-header p {
  font-size: 1rem;
}

/* Neon Text Gradient */
.text-neon {
  color: var(--accent-primary);
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent-primary) 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Code Highlighting Syntaxes */
.code-tag {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.code-bracket {
  color: var(--accent-primary);
  font-family: var(--font-mono);
}

.cursor-blink {
  display: inline-block;
  color: var(--accent-primary);
  animation: blink 1s step-start infinite;
}

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

/* Cards & Containers */
.card-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(12px);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 26px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #0e0e10;
  box-shadow: 0 4px 15px rgba(var(--accent-primary-rgb), 0.25);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(var(--accent-primary-rgb), 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

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

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 1.1rem;
}

.btn-icon:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: var(--accent-soft);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 20px;
  left: 0;
  width: 100%;
  z-index: 1000;
  margin-bottom: -70px;
}

.nav-wrapper {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.site-header.scrolled .nav-wrapper {
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-md);
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-main);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.brand-logo .logo-icon {
  width: 34px;
  height: 34px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 800;
}

/* Nav Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* Nav Right Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.social-link:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: var(--accent-soft);
}

.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #eab308;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: #eab308;
  background: rgba(234, 179, 8, 0.1);
}

.mobile-toggle-btn {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.mobile-toggle-btn span {
  width: 20px;
  height: 2px;
  background-color: var(--text-main);
  transition: all var(--transition-fast);
}

/* ==========================================================================
   Off-Canvas & Mobile Drawer
   ========================================================================== */
.offcanvas-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.offcanvas-overlay.active {
  opacity: 1;
  visibility: visible;
}

.offcanvas-drawer {
  position: fixed;
  top: 0;
  right: -380px;
  width: 100%;
  max-width: 380px;
  height: 100vh;
  background: var(--bg-card);
  border-left: 1px solid var(--border-color);
  z-index: 1100;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  transition: right var(--transition-slow);
}

.offcanvas-drawer.active {
  right: 0;
}

.offcanvas-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}

.offcanvas-close-btn {
  font-size: 1.5rem;
  color: var(--text-muted);
}

.offcanvas-close-btn:hover {
  color: var(--accent-primary);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 30px;
}

.mobile-nav-list a {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav-list a:hover {
  color: var(--accent-primary);
  padding-left: 6px;
}

.offcanvas-contact-info {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contact-info-item .label {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
}

.contact-info-item .val {
  font-size: 0.95rem;
  color: var(--text-main);
  font-weight: 500;
}

/* ==========================================================================
   Hero Section (Zelio Index-2 Layout)
   ========================================================================== */
.hero-section {
  padding-top: 150px;
  padding-bottom: 60px;
}

.hero-card {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 50px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  position: relative;
  overflow: visible;
}

/* Hero Left: Hexagon Portrait with Ambient Light & Bottom Badge */
.hero-avatar-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hexagon-outer {
  position: relative;
  width: 100%;
  max-width: 340px;
  aspect-ratio: 1 / 1.15;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Ambient glow backdrop */
.hexagon-outer::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 110%;
  height: 110%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.2) 0%, rgba(168, 255, 83, 0.12) 45%, transparent 70%);
  border-radius: 50%;
  filter: blur(20px);
  z-index: 0;
  pointer-events: none;
}

.hexagon-frame {
  position: relative;
  width: 100%;
  height: 100%;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.4) 0%, rgba(168, 255, 83, 0.3) 100%);
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: transform var(--transition-normal);
}

.hexagon-frame:hover {
  transform: scale(1.02);
}

.hexagon-inner {
  width: 100%;
  height: 100%;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  background: #111116;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hexagon-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  transition: transform var(--transition-slow);
}

.hexagon-frame:hover .hexagon-inner img {
  transform: scale(1.06);
}

/* Hexagon Bottom Code Badge */
.hex-code-badge {
  position: absolute;
  bottom: -18px;
  left: 50%;
  transform: translateX(-50%);
  width: 52px;
  height: 58px;
  background: var(--accent-primary);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0e0e10;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.15rem;
  box-shadow: 0 6px 20px rgba(168, 255, 83, 0.4);
  z-index: 5;
  transition: transform var(--transition-fast);
}

.hex-code-badge:hover {
  transform: translateX(-50%) scale(1.1) rotate(5deg);
}

/* Hero Right: Content Column */
.hero-content {
  display: flex;
  flex-direction: column;
  gap: 18px;
  z-index: 2;
}

.tag-pink {
  color: #ff5e9a;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
}

.tag-white {
  color: #f4f4f5;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  margin: 0 4px;
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin: 4px 0;
}

.hero-bio {
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-bio .text-subtle {
  color: #d4d4d8;
}

.hero-bio .text-pink {
  color: #ff7597;
  font-weight: 500;
}

/* Tech Icon Squares Row */
.tech-icons-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
  margin-bottom: 6px;
}

.tech-icon-box {
  width: 48px;
  height: 48px;
  background: #191920;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.tech-icon-box:hover {
  border-color: var(--accent-primary);
  background: var(--accent-soft);
  transform: translateY(-3px);
}

.tech-more-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-left: 4px;
}

/* Action Links */
.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 12px;
}

.cv-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.cv-download-btn i {
  color: var(--accent-primary);
  font-size: 1.25rem;
}

.cv-download-btn:hover {
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.badge-text-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
}

.badge-text-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Counter / Stats Strip
   ========================================================================== */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.stat-item:hover {
  border-color: var(--border-color-hover);
}

.stat-icon {
  font-size: 2rem;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
}

.stat-number {
  font-family: var(--font-main);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}

.stat-number span {
  color: var(--accent-primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   Cooperation & Git Journaling Section
   ========================================================================== */
.grid-2col {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.cooperation-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.cooperation-header {
  margin-bottom: 24px;
}

.cooperation-channels {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.channel-link i {
  color: var(--accent-primary);
  font-size: 1.1rem;
}

.channel-link .label {
  color: var(--text-dim);
}

.channel-link .value {
  color: var(--text-main);
  font-weight: 500;
}

.channel-link:hover {
  border-color: var(--accent-primary);
  background: var(--accent-soft);
}

/* Git Journaling Terminal Card */
.terminal-card {
  background: #111114;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  display: flex;
  flex-direction: column;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 14px;
  margin-bottom: 18px;
}

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

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #eab308; }
.dot-green { background: #22c55e; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.git-log-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.git-log-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  position: relative;
  padding-left: 14px;
}

.git-log-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-primary);
}

.git-date {
  color: var(--accent-primary);
  white-space: nowrap;
}

.git-commit-msg {
  color: var(--text-muted);
}

.git-commit-msg:hover {
  color: var(--text-main);
}

/* ==========================================================================
   Services Section (What I Do)
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: 100%;
}

.service-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  font-size: 1.6rem;
  transition: all var(--transition-normal);
}

.service-card:hover .service-icon-box {
  background: var(--accent-primary);
  color: #0e0e10;
  transform: scale(1.08) rotate(4deg);
}

.service-title {
  font-size: 1.25rem;
}

.service-description {
  font-size: 0.92rem;
  line-height: 1.6;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 10px;
}

.service-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 8px;
  background: var(--bg-card-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
}

/* ==========================================================================
   Experience Section (Tabbed Company History)
   ========================================================================== */
.experience-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 30px;
}

.company-tabs {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.company-tab-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: left;
  transition: all var(--transition-fast);
}

.company-tab-btn:hover {
  border-color: var(--border-color-hover);
}

.company-tab-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent-primary);
}

.tab-company-info h4 {
  font-size: 1.05rem;
  color: var(--text-main);
}

.tab-company-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.company-tab-btn.active .tab-company-info h4 {
  color: var(--accent-primary);
}

.experience-details {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.role-title {
  font-size: 1.6rem;
  margin-bottom: 6px;
}

.role-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
  margin-bottom: 24px;
}

.role-responsibilities {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.role-responsibilities li {
  position: relative;
  padding-left: 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.role-responsibilities li::before {
  content: "▹";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-primary);
  font-size: 1.1rem;
}

.experience-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.experience-subgroup {
  margin-top: 22px;
}

.experience-subgroup-title {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.experience-subgroup-title i {
  color: var(--accent-primary);
  font-size: 1rem;
}

.tech-icon-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.tech-icon-square {
  width: 48px;
  height: 48px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tech-icon-square:hover {
  border-color: var(--accent-primary);
  background: rgba(168, 255, 83, 0.08);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.tech-icon-square i {
  font-size: 24px;
  line-height: 1;
  transition: transform var(--transition-fast);
}

.tech-icon-square:hover i {
  transform: scale(1.12);
}

/* Tooltip on hover */
.tech-icon-square::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: #181820;
  color: var(--text-main);
  border: 1px solid var(--border-color-hover);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.6);
  z-index: 25;
}

.tech-icon-square::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  border-width: 5px 5px 0 5px;
  border-style: solid;
  border-color: #181820 transparent transparent transparent;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 26;
}

.tech-icon-square:hover::after,
.tech-icon-square:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ==========================================================================
   Education & Research Section
   ========================================================================== */
.timeline-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.timeline-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.timeline-box-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.timeline-box-header i {
  font-size: 1.6rem;
  color: var(--accent-primary);
}

.timeline-scrollable {
  max-height: 250px;
  overflow-y: auto;
  padding-right: 12px;
  padding-left: 4px;
}

.timeline-scrollable::-webkit-scrollbar {
  width: 5px;
}

.timeline-scrollable::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 4px;
}

.timeline-scrollable::-webkit-scrollbar-thumb {
  background: rgba(168, 255, 83, 0.35);
  border-radius: 4px;
}

.timeline-scrollable::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

.timeline-list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-left: 20px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 5px;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 2px solid var(--bg-card);
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 1.05rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.timeline-sub {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Projects / Portfolio Section
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.project-card:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.project-img-wrapper {
  position: relative;
  width: 100%;
  height: 240px;
  overflow: hidden;
  background: var(--bg-card-subtle);
}

.project-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-img-wrapper img {
  transform: scale(1.06);
}

.project-category-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-primary);
  font-weight: 600;
}

.project-content {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  gap: 14px;
}

.project-title {
  font-size: 1.4rem;
}

.project-desc {
  font-size: 0.92rem;
  line-height: 1.6;
}

.project-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 10px;
}

.project-tech-item {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  background: var(--bg-card-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.project-links {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  margin-top: 14px;
}

.project-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.project-link-btn:hover {
  color: var(--accent-primary);
}

/* ==========================================================================
   Skills Matrix Section
   ========================================================================== */
.skills-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.skill-category-card h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.skill-category-card h3 i {
  color: var(--accent-primary);
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-family: var(--font-mono);
  color: var(--text-main);
  transition: all var(--transition-fast);
}

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

/* ==========================================================================
   Blog Section
   ========================================================================== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

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

.blog-thumbnail {
  position: relative;
  height: 200px;
  background: var(--bg-card-subtle);
  overflow: hidden;
}

.blog-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.blog-card:hover .blog-thumbnail img {
  transform: scale(1.05);
}

.blog-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-primary);
}

.blog-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-grow: 1;
}

.blog-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.blog-title {
  font-size: 1.15rem;
  line-height: 1.4;
}

.blog-title:hover {
  color: var(--accent-primary);
}

/* ==========================================================================
   Contact Section & Form
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 30px;
}

.contact-info-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-direct-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.direct-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.direct-item i {
  font-size: 1.3rem;
  color: var(--accent-primary);
}

.direct-item-text .sub {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
}

.direct-item-text .main {
  font-size: 0.95rem;
  color: var(--text-main);
  font-weight: 500;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(var(--accent-primary-rgb), 0.15);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
  background: var(--bg-primary);
  margin-top: 40px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

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

.footer-copy {
  font-size: 0.88rem;
  color: var(--text-dim);
}

.back-to-top-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.back-to-top-btn:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-card {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
    padding: 36px 24px;
  }

  .hero-content {
    align-items: center;
  }

  .tech-icons-row, .hero-actions {
    justify-content: center;
  }

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

  .grid-2col {
    grid-template-columns: 1fr;
  }

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

  .experience-layout {
    grid-template-columns: 1fr;
  }

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

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

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

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

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .nav-menu, .nav-actions .social-links {
    display: none;
  }

  .mobile-toggle-btn {
    display: flex;
  }

  .hero-title {
    font-size: 2.2rem;
  }

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

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

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

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

  .form-row {
    grid-template-columns: 1fr;
  }

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

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