/* ==========================================================================
   V2 DESIGN SYSTEM: MODERN VANILLA CSS
   Linear/Vercel-inspired 2026 Developer Portfolio Theme
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Plus+Jakarta+Sans:wght@500;600;700;800;900&display=swap');

/* --- 1. CSS Custom Properties & Design Tokens --- */
:root {
  --font-sans: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Light Theme (Default fallback) */
  --bg-body: #f8fafc;
  --bg-body-mesh: radial-gradient(at 10% 20%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
                  radial-gradient(at 90% 10%, rgba(139, 92, 246, 0.06) 0px, transparent 50%),
                  radial-gradient(at 50% 80%, rgba(6, 182, 212, 0.05) 0px, transparent 50%);
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-glass: rgba(255, 255, 255, 0.78);
  --bg-pill: rgba(255, 255, 255, 0.88);
  --border-subtle: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.14);
  --border-glow: rgba(99, 102, 241, 0.35);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.2);
  --primary-light: rgba(99, 102, 241, 0.08);

  --cyan: #06b6d4;
  --cyan-glow: rgba(6, 182, 212, 0.2);
  --emerald: #10b981;
  --emerald-glow: rgba(16, 185, 129, 0.25);

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px -1px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 30px -4px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 20px 45px -8px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px -10px var(--primary-glow);

  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

  --filter-client-logo: none;
}

/* Dark Theme (Active by default on .dark or [data-theme="dark"]) */
html.dark,
[data-theme="dark"] {
  --bg-body: #07090e;
  --bg-body-mesh: radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.14) 0%, transparent 45%),
                  radial-gradient(circle at 85% 25%, rgba(139, 92, 246, 0.12) 0%, transparent 45%),
                  radial-gradient(circle at 50% 75%, rgba(6, 182, 212, 0.08) 0%, transparent 55%);
  --bg-surface: rgba(15, 20, 31, 0.72);
  --bg-surface-elevated: rgba(22, 30, 47, 0.85);
  --bg-surface-glass: rgba(11, 15, 25, 0.75);
  --bg-pill: rgba(15, 20, 31, 0.82);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --border-glow: rgba(99, 102, 241, 0.5);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  --primary: #6366f1;
  --primary-hover: #818cf8;
  --primary-glow: rgba(99, 102, 241, 0.32);
  --primary-light: rgba(99, 102, 241, 0.15);

  --shadow-sm: 0 4px 12px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 36px 0 rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 60px 0 rgba(0, 0, 0, 0.6);

  --filter-client-logo: brightness(0) invert(1);
}

/* --- 2. Reset & Universal Layout --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-body);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  background-image: var(--bg-body-mesh);
  background-attachment: fixed;
  background-size: cover;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

::selection {
  background-color: var(--primary);
  color: #ffffff;
}

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

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

button {
  cursor: pointer;
}

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

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* --- 3. Typography & Utility Badges --- */
.font-mono {
  font-family: var(--font-mono);
}

.gradient-text {
  background: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--border-glow);
  box-shadow: 0 0 20px -5px var(--primary-glow);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--text-secondary);
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
}

/* --- 4. Floating Pill Navigation Header --- */
.header-wrapper {
  position: fixed;
  top: 1.25rem;
  left: 0;
  right: 0;
  z-index: 1000;
  pointer-events: none;
}

.nav-pill {
  pointer-events: auto;
  margin: 0 auto;
  max-width: 1040px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.25rem;
  background: var(--bg-pill);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-smooth);
}

.nav-pill:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: -0.04em;
}

.brand-pill {
  font-size: 0.65rem;
  font-weight: 800;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-xs);
  background: var(--primary);
  color: #ffffff;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  padding: 0.2rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
}

.lang-btn {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.lang-btn.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--primary-glow);
}

/* Theme Toggle Button */
.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.theme-btn:hover {
  color: var(--primary);
  border-color: var(--border-highlight);
  transform: rotate(15deg);
}

/* Hamburger & Mobile Drawer */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 28px;
  height: 28px;
  padding: 4px;
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-smooth);
}

.mobile-drawer {
  display: none;
  position: fixed;
  top: 4.8rem;
  left: 1.5rem;
  right: 1.5rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  z-index: 999;
}

.mobile-drawer.open {
  display: block;
  animation: slideDown 0.25s ease-out forwards;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mobile-nav-link {
  font-size: 1rem;
  font-weight: 600;
  display: block;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
}

.mobile-nav-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}

/* --- 5. Hero Section & Developer Console --- */
.hero-section {
  padding-top: 9rem;
  padding-bottom: 5rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald);
  box-shadow: 0 0 12px var(--emerald);
  position: relative;
}

.status-dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1px solid var(--emerald);
  animation: pulseBeacon 2s infinite;
}

@keyframes pulseBeacon {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(2.4); opacity: 0; }
}

.hero-title {
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 1.25rem;
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--primary-glow);
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--primary-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--border-highlight);
  background: var(--bg-surface-elevated);
  transform: translateY(-2px);
}

/* Console Terminal Card */
.console-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
}

.console-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.console-tabs {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.console-tab {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-xs);
  color: var(--text-muted);
  cursor: pointer;
}

.console-tab.active {
  background: var(--bg-surface);
  color: var(--primary);
  border: 1px solid var(--border-subtle);
}

.console-body {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  max-height: 380px;
  overflow-y: auto;
}

.token-key { color: #818cf8; }
.token-str { color: #34d399; }
.token-num { color: #f59e0b; }
.token-comment { color: #64748b; font-style: italic; }

/* --- 6. Bento Experience Grid (#about) --- */
.bento-section {
  padding: 6rem 0;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}

.bento-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.bento-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-md), 0 0 30px -10px var(--primary-glow);
  transform: translateY(-3px);
}

/* Card Sizes */
.col-span-8 { grid-column: span 8; }
.col-span-4 { grid-column: span 4; }
.col-span-6 { grid-column: span 6; }
.col-span-12 { grid-column: span 12; }

/* Quotes & Bio Card */
.quote-box {
  margin-bottom: 1.25rem;
  padding-left: 1rem;
  border-left: 3px solid var(--primary);
}

.quote-highlight {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

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

/* Keyboard Audio Player Card */
.keeb-player {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.keeb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin: 1.5rem 0;
}

.play-toggle-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: 0 4px 20px var(--primary-glow);
  transition: all var(--transition-fast);
}

.play-toggle-btn:hover {
  transform: scale(1.08);
  background: var(--primary-hover);
}

/* Equalizer Bars */
.equalizer-wave {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 36px;
  flex-grow: 1;
}

.eq-bar {
  flex: 1;
  background: var(--primary-light);
  border: 1px solid var(--border-glow);
  border-radius: 2px;
  height: 25%;
  transition: height 0.15s ease;
}

.playing .eq-bar:nth-child(1) { animation: bounce 0.8s infinite ease-in-out; }
.playing .eq-bar:nth-child(2) { animation: bounce 0.6s infinite ease-in-out 0.1s; }
.playing .eq-bar:nth-child(3) { animation: bounce 0.9s infinite ease-in-out 0.2s; }
.playing .eq-bar:nth-child(4) { animation: bounce 0.7s infinite ease-in-out 0.15s; }
.playing .eq-bar:nth-child(5) { animation: bounce 0.85s infinite ease-in-out 0.05s; }

@keyframes bounce {
  0%, 100% { height: 18%; }
  50% { height: 95%; background: var(--primary); }
}

.keeb-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-pill {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

/* Live JST Clock Card */
.jst-clock-box {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--primary);
  margin: 1rem 0;
}

.jst-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Technical Competencies Quadrant */
.tech-quad-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.tech-quad-item {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.tech-quad-title {
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.tech-quad-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- 7. Filterable Projects Showcase (#projects) --- */
.projects-section {
  padding: 6rem 0;
}

.filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-tab {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  border-color: var(--border-highlight);
  color: var(--text-primary);
}

.filter-tab.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 4px 18px var(--primary-glow);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
}

.project-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), 0 0 35px -10px var(--primary-glow);
}

.project-thumb-box {
  width: 100%;
  height: 220px;
  overflow: hidden;
  position: relative;
  background: var(--bg-surface-elevated);
}

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

.project-card:hover .project-thumb {
  transform: scale(1.05);
}

.project-category-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.85);
  color: #ffffff;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  z-index: 10;
  pointer-events: none;
  transition: transform var(--transition-smooth), background-color var(--transition-smooth);
}

.project-card:hover .project-category-tag {
  transform: translateY(-2px);
}

.project-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.project-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-metric {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--emerald);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
  margin-top: auto;
}

.project-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.project-link:hover {
  text-decoration: underline;
}

/* --- 8. Enterprise Clients Section (#clients) --- */
.clients-section {
  padding: 5rem 0;
}

.clients-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3.5rem;
  flex-wrap: wrap;
  padding: 2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
}

.client-logo-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  transition: all var(--transition-fast);
}

.client-logo-wrapper:hover {
  transform: translateY(-3px);
}

.client-logo {
  object-fit: contain;
  filter: var(--filter-client-logo);
  transition: all var(--transition-fast);
  opacity: 0.85;
}

.client-logo:hover {
  opacity: 1;
}

.client-logo.nanoland { height: 3rem; }
.client-logo.blp { height: 2.75rem; }
.client-logo.nanocenter { height: 2.25rem; }

/* --- 9. Hobbies & PC Setup Hub (#blog) --- */
.hobbies-section {
  padding: 6rem 0;
}

.hobbies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.hobby-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-smooth);
}

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

.hobby-thumb {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.hobby-body {
  padding: 1.5rem;
}

.hobby-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.hobby-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- 10. Team Members & Network (#member) --- */
.team-section {
  padding: 6rem 0;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.75rem;
}

.team-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-smooth);
}

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

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1.25rem;
  border: 2px solid var(--border-glow);
}

.team-name {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
}

.team-role {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

/* --- 11. Anti-Spam Contact Hub & Toast (#contact) --- */
.contact-section {
  padding: 6rem 0;
}

.contact-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: clamp(2rem, 5vw, 4rem);
  box-shadow: var(--shadow-lg);
  max-width: 800px;
  margin: 0 auto;
}

.contact-quick-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

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

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

/* Honeypot field (hidden from humans) */
.honeypot-field {
  display: none !important;
  visibility: hidden !important;
  opacity: 0 !important;
  position: absolute !important;
  left: -9999px !important;
}

/* Toast Notification */
.toast-notification {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 99999;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius-full);
  background: var(--text-primary);
  color: var(--text-inverse);
  font-size: 0.88rem;
  font-weight: 700;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all var(--transition-smooth);
}

.toast-notification.show {
  opacity: 1;
  transform: translateY(0);
}

/* --- 12. Minimalist Footer --- */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2.5rem;
  background: var(--bg-surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

/* --- 13. Responsive Media Queries --- */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .nav-links,
  .brand-badge span:first-child {
    display: none;
  }

  .hamburger {
    display: flex;
  }

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

  .col-span-8,
  .col-span-4,
  .col-span-6,
  .col-span-12 {
    grid-column: span 1;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .projects-grid,
  .hobbies-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

/* ==========================================================================
   15. Interactive Enhancements: Console Copy, Lightbox Modal & Tooltips
   ========================================================================== */

/* Console Copy Button */
.console-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.console-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-sans);
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--text-secondary);
  user-select: none;
}

.status-dot-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--emerald);
  box-shadow: 0 0 10px var(--emerald-glow), 0 0 4px var(--emerald);
  display: inline-block;
  animation: pulse-dot 2.5s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

.status-label {
  color: var(--emerald);
  font-weight: 700;
}

.status-version {
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 500;
  opacity: 0.8;
}

.console-divider {
  width: 1px;
  height: 14px;
  background: var(--border-subtle);
}

.console-copy-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.console-copy-btn:hover {
  background: var(--bg-surface-elevated);
  color: var(--primary);
  border-color: var(--border-highlight);
  transform: translateY(-1px);
}

.console-copy-btn.copied {
  color: var(--emerald);
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.1);
}

/* Project Image Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-smooth), visibility var(--transition-smooth);
}

.lightbox-modal.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 15, 29, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 88vh;
  background: var(--bg-surface);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  transform: scale(0.95);
  transition: transform var(--transition-smooth);
}

.lightbox-modal.active .lightbox-content {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid var(--border-subtle);
  color: #fff;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 20;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: scale(1.1);
}

#lightbox-img {
  max-width: 100%;
  max-height: calc(88vh - 4.5rem);
  object-fit: contain;
  display: block;
  background: #090d16;
}

.lightbox-caption {
  padding: 0.85rem 1.5rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Cursor pointer on zoomable thumbs */
.project-thumb-box {
  cursor: zoom-in;
}

/* Keyboard Spec Micro-Tooltips */
.spec-tooltip {
  position: relative;
  cursor: help;
  display: inline-flex;
  align-items: center;
}

.spec-tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-highlight);
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  z-index: 100;
}

.spec-tooltip::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border-width: 5px;
  border-style: solid;
  border-color: var(--border-highlight) transparent transparent transparent;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: 100;
}

.spec-tooltip:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.spec-tooltip:hover::before {
  opacity: 1;
}

/* --- 16. New Features: Progress Bar, Back to Top, Filter Badges & Status Pill --- */

/* Scroll Progress Bar */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  z-index: 99999;
  transition: width 0.08s ease-out;
}

/* Floating Back to Top Button */
.back-to-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 900;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.95rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-glow);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
  font-size: 0.8rem;
  font-weight: 700;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-smooth);
  cursor: pointer;
}

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

.back-to-top-btn:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-2px);
}

/* Filter Tab Count Badge */
.filter-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.12);
  margin-left: 0.4rem;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.filter-tab.active .filter-count {
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}