/* ==========================================================================
   KG Akshay Hebbar — Applied AI & Enterprise Platform Architect Portfolio
   Design System & Styling
   ========================================================================== */

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

/* --- CSS Variables / Theme Tokens --- */
:root {
  color-scheme: dark;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;

  /* Dark Theme Palette (Default) */
  --bg-base: #0a0e17;
  --bg-surface: #111827;
  --bg-surface-elevated: #1a2234;
  --bg-surface-hover: #222d42;
  --bg-glass: rgba(17, 24, 39, 0.75);
  --bg-glass-elevated: rgba(26, 34, 52, 0.85);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-inverse: #0f172a;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);
  --border-focus: #38bdf8;

  /* Accents */
  --accent-cyan: #38bdf8;
  --accent-indigo: #818cf8;
  --accent-emerald: #34d399;
  --accent-amber: #fbbf24;
  --accent-rose: #f43f5e;

  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  --accent-gradient-subtle: linear-gradient(135deg, rgba(56, 189, 248, 0.12) 0%, rgba(129, 140, 248, 0.12) 100%);
  --accent-glow: 0 0 35px rgba(56, 189, 248, 0.18);
  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.05);
  --modal-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.75);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
  /* Hero portrait card: slower than --transition-smooth so the breakout reads as a move. */
  --transition-portrait: 680ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-signature: 1.4s cubic-bezier(0.55, 0, 0.3, 1);

  /* Hero portrait card. The plate, bezel and glow all need to flip with the
     theme - hardcoding them left the card reading as a dark-theme object on a
     light page. */
  --portrait-plate: #efe7d9;
  --portrait-bezel: linear-gradient(145deg, rgba(56, 189, 248, 0.45), rgba(129, 140, 248, 0.14), rgba(255, 255, 255, 0.06));
  --portrait-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.55), 0 0 40px rgba(56, 189, 248, 0.2);
  --portrait-ground: rgba(32, 30, 29, 0.12);
  --portrait-ink: #201e1d;
}

/* Light Theme Overrides */
[data-theme="light"] {
  color-scheme: light;
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-glass-elevated: rgba(248, 250, 252, 0.92);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-subtle: #64748b;
  --text-inverse: #f8fafc;

  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #0284c7;

  --accent-cyan: #0284c7;
  --accent-indigo: #6366f1;
  --accent-emerald: #059669;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;

  --accent-gradient: linear-gradient(135deg, #0284c7 0%, #6366f1 50%, #9333ea 100%);
  --accent-gradient-subtle: linear-gradient(135deg, rgba(2, 132, 199, 0.08) 0%, rgba(99, 102, 241, 0.08) 100%);
  --accent-glow: 0 0 35px rgba(2, 132, 199, 0.12);
  --card-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.04);
  --modal-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25);

  /* Light blue plate, and a bezel/glow built from the light accents so the card
     sits on the pale page instead of floating on it. */
  --portrait-plate: #e0f2fe;
  --portrait-bezel: linear-gradient(145deg, rgba(2, 132, 199, 0.38), rgba(99, 102, 241, 0.16), rgba(255, 255, 255, 0.55));
  --portrait-shadow: 0 10px 30px -10px rgba(15, 23, 42, 0.22), 0 0 40px rgba(2, 132, 199, 0.14);
  --portrait-ground: rgba(15, 23, 42, 0.10);
  --portrait-ink: #0f2337;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
  width: 100%;
  overflow-x: clip;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  width: 100%;
  overflow-x: clip;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

body.menu-open {
  overflow: hidden;
}

/* Background Ambient Orbs */
.bg-ambient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  transition: opacity var(--transition-normal);
}

[data-theme="light"] .orb {
  opacity: 0.18;
}

.orb-1 {
  width: 600px;
  height: 600px;
  top: -200px;
  right: -100px;
  background: radial-gradient(circle, var(--accent-cyan), transparent 70%);
}

.orb-2 {
  width: 700px;
  height: 700px;
  top: 40%;
  left: -250px;
  background: radial-gradient(circle, var(--accent-indigo), transparent 70%);
}

.orb-3 {
  width: 500px;
  height: 500px;
  bottom: -150px;
  right: 15%;
  background: radial-gradient(circle, var(--accent-emerald), transparent 70%);
}

/* Grid Pattern Overlay */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(var(--border-subtle) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); margin-bottom: 0.75rem; }
h3 { font-size: 1.25rem; font-weight: 600; }

p {
  color: var(--text-muted);
  font-size: 1rem;
}

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

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

/* Section Common */
section {
  padding: 5.5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  background: var(--accent-gradient-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.section-tag svg {
  width: 14px;
  height: 14px;
}

.section-desc {
  font-size: 1.075rem;
  color: var(--text-muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.925rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(2px);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-surface);
  border-color: var(--border-medium);
  color: var(--text-main);
}

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

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.825rem;
  border-radius: var(--radius-sm);
}

/* Badges & Status */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  position: relative;
}

.status-dot::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  opacity: 0.4;
  animation: pulse-ring 2s cubic-bezier(0.455, 0.03, 0.515, 0.955) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.6); opacity: 0; }
  100% { transform: scale(0.9); opacity: 0; }
}

/* --- Header / Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
  padding-top: env(safe-area-inset-top, 0);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-main);
}

.brand-accent {
  color: var(--accent-cyan);
}

.brand-monogram {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: block;
  object-fit: cover;
  background: var(--bg-surface-elevated);
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  list-style: none;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 0.3rem 0;
}

.nav-icon {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  opacity: 0.75;
  transition: opacity var(--transition-fast);
}

.nav-links a:hover .nav-icon,
.nav-links a.active .nav-icon {
  opacity: 1;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  transition: width var(--transition-fast);
}

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

@media (min-width: 769px) and (max-width: 1059px) {
  .nav-icon {
    display: none;
  }
  .nav-links {
    gap: 1.15rem;
  }
}

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

/* Theme Toggle Button */
.theme-toggle {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--text-main);
  border-color: var(--accent-cyan);
  transform: scale(1.05);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

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

/* Mobile Menu Button */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.mobile-toggle:hover {
  background: var(--bg-surface-elevated);
}

.mobile-toggle svg {
  width: 22px;
  height: 22px;
}

.mobile-toggle .icon-menu {
  display: block;
}

.mobile-toggle .icon-close-menu {
  display: none;
}

.mobile-toggle[aria-expanded="true"] .icon-menu {
  display: none;
}

.mobile-toggle[aria-expanded="true"] .icon-close-menu {
  display: block;
}

/* Nav Backdrop for Mobile Drawer */
.nav-backdrop {
  position: fixed;
  inset: 0;
  top: calc(72px + env(safe-area-inset-top, 0px));
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease;
}

.nav-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

/* --- Hero Section --- */
.hero-section {
  padding-top: 4.5rem;
  padding-bottom: 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1.05fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent-cyan);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.hero-title {
  margin: 0.25rem 0;
}

.hero-pitch {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.hero-socials {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 0.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.social-link svg {
  width: 18px;
  height: 18px;
}

.social-link:hover {
  color: var(--accent-cyan);
}

/* Hero Portrait Card & Visual Area */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

/*
 * Three-layer composition: tinted plate, cut-out portrait PNG, handwritten signature.
 * On hover the portrait zooms, tilts and breaks out past the card frame with a white
 * silhouette halo, while the signature wipes on left to right.
 *
 * Every fixed dimension is multiplied by --portrait-scale so the whole card can shrink
 * proportionally on narrow screens. The layered positions are percentage-based on the
 * card box, so it must scale rather than reflow.
 */
.portrait-visual {
  --portrait-scale: 1;
  /* Breakout room: the portrait grows upward out of the frame on hover. */
  --portrait-breakout: calc(64px * var(--portrait-scale));
  --portrait-plate-radius: calc(18px * var(--portrait-scale));
  position: relative;
  width: calc(380px * var(--portrait-scale));
  max-width: 100%;
  padding-top: var(--portrait-breakout);
}

.portrait-card {
  position: relative;
  width: 100%;
  height: calc(462px * var(--portrait-scale));
  padding: calc(8px * var(--portrait-scale));
  border-radius: calc(24px * var(--portrait-scale));
  background: var(--portrait-bezel);
  box-shadow: var(--portrait-shadow);
  /* Required for the hover breakout. */
  overflow: visible;
  animation: cardFloat 7s ease-in-out infinite;
}

.portrait-plate {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: var(--portrait-plate-radius);
  background: var(--portrait-plate);
  overflow: visible;
}

/* Bottom shading, to ground the figure on the plate. */
.portrait-plate::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 36%;
  border-radius: 0 0 var(--portrait-plate-radius) var(--portrait-plate-radius);
  background: linear-gradient(180deg, transparent 0%, var(--portrait-ground) 100%);
  pointer-events: none;
}

.portrait-label {
  position: absolute;
  top: calc(16px * var(--portrait-scale));
  left: calc(18px * var(--portrait-scale));
  z-index: 4;
  font-family: var(--font-mono);
  font-size: calc(10px * var(--portrait-scale));
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--portrait-ink);
  opacity: 0.62;
}

/* Crops the resting zoom flush to the plate; opens up at the top and sides on hover,
   but stays closed at the bottom so the figure never crosses the bottom border. */
.portrait-frame {
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: var(--portrait-plate-radius);
  overflow: hidden;
  clip-path: inset(0 0 0 0);
  transition: clip-path var(--transition-portrait);
}

.portrait-img {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 100%;
  /* Overrides any inherited img clamp, which would otherwise cap the zoom. */
  max-width: none;
  display: block;
  transform: translateX(-50%) rotate(0deg) scale(1.12);
  transform-origin: 50% 100%;
  filter: url(#featherEdge);
  transition: transform var(--transition-portrait), filter 680ms ease;
}

.portrait-signature {
  position: absolute;
  right: calc(10px * var(--portrait-scale));
  bottom: calc(24px * var(--portrait-scale));
  z-index: 3;
  width: 52%;
  max-width: none;
  display: block;
  transform: translateX(0) rotate(-7deg);
  transform-origin: 100% 100%;
  /* Keeps the white ink legible over the suit. */
  filter: drop-shadow(0 1px 6px rgba(0, 0, 0, 0.45));
  /* Hidden at rest; the mask slides 100% -> 0% to write the signature on. */
  -webkit-mask-image: linear-gradient(90deg, #000 42%, rgba(0, 0, 0, 0) 58%);
  -webkit-mask-size: 280% 100%;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: 100% 0;
  mask-image: linear-gradient(90deg, #000 42%, rgba(0, 0, 0, 0) 58%);
  mask-size: 280% 100%;
  mask-repeat: no-repeat;
  mask-position: 100% 0;
  transition: mask-position var(--transition-signature),
    -webkit-mask-position var(--transition-signature),
    transform var(--transition-portrait);
}

.portrait-visual:hover .portrait-frame {
  overflow: visible;
  clip-path: inset(-18% -18% 0% -18%);
}

.portrait-visual:hover .portrait-img {
  transform: translateX(-50%) rotate(-2.5deg) scale(1.2);
  filter: url(#featherEdgeWide);
}

.portrait-visual:hover .portrait-signature {
  transform: translateX(10px) rotate(-7deg);
  mask-position: 0% 0;
  -webkit-mask-position: 0% 0;
}

/* The white halo disappears against the light theme's pale ground, so swap in
   the ink-flooded filter there. */
[data-theme="light"] .portrait-visual:hover .portrait-img {
  filter: url(#featherEdgeWideInk);
}

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* Floating Impact Pills */
.hero-pill {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  background: var(--bg-glass-elevated);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
  font-size: 0.8rem;
  z-index: 2;
  animation: float 4s ease-in-out infinite alternate;
}

.hero-pill-1 {
  top: 30px;
  left: -40px;
  animation-delay: 0s;
}

.hero-pill-2 {
  bottom: 40px;
  right: -35px;
  animation-delay: 1.5s;
}

.hero-pill-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient-subtle);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.hero-pill-icon svg {
  width: 18px;
  height: 18px;
}

.hero-pill-text b {
  display: block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.1;
}

.hero-pill-text span {
  color: var(--text-muted);
  font-size: 0.75rem;
}

@keyframes float {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}

/* --- Enterprise Impact Metrics Section --- */
.impact-section {
  padding: 2.5rem 0 4.5rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}

.metric-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.6rem 0.75rem 1.4rem;
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

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

.metric-val {
  display: block;
  font-family: var(--font-sans);
  font-size: clamp(1.8rem, 2.4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.05;
  margin-bottom: 0.45rem;
}

.metric-unit {
  font-size: 0.45em;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-left: 0.15em;
}

.metric-card > span:not(.metric-val) {
  font-size: 0.825rem;
  color: var(--text-muted);
  font-weight: 500;
  line-height: 1.3;
}

/* --- Featured Independent Products (docs-site) --- */
.products-section {
  background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

/* Segmented Control / Filter Tabs */
.filter-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.tab-btn {
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-main);
  border-color: var(--border-medium);
}

.tab-btn.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.25);
}

/* Products Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.product-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
}

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

.product-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.1rem;
}

.product-brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.product-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  object-fit: contain;
  background: var(--bg-surface-elevated);
  padding: 4px;
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.product-title-wrap h3 {
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.product-platform {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--accent-cyan);
  margin-top: 0.15rem;
  font-family: var(--font-mono);
}

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 500;
  font-family: var(--font-mono);
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.badge-live::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
  opacity: 0.85;
}

.product-card:hover .badge-live {
  border-color: var(--border-medium);
  color: var(--text-main);
}

.badge-soon {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 500;
  font-family: var(--font-mono);
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  color: var(--text-subtle);
  border: 1px solid var(--border-subtle);
  letter-spacing: 0.02em;
}

.badge-soon::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-amber);
  opacity: 0.75;
}

.product-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.5rem;
}

.tag-pill {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-subtle);
  font-family: var(--font-mono);
}

.product-actions {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--border-subtle);
}

.action-links {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.action-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

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

.action-link-secondary {
  color: var(--text-muted);
}

.action-link-secondary:hover {
  color: var(--text-main);
}

.preview-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.preview-btn:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-medium);
}

.preview-btn svg {
  width: 14px;
  height: 14px;
}

/* --- Career & Professional Experience Section --- */
.experience-section {
  padding: 5.5rem 0;
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 24px;
  width: 2px;
  background: var(--border-medium);
}

.timeline-item {
  position: relative;
  padding-left: 68px;
  margin-bottom: 3.5rem;
}

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

.timeline-node {
  position: absolute;
  left: 12px;
  top: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--bg-base);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
  z-index: 2;
}

.timeline-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
}

.timeline-card:hover {
  border-color: var(--border-medium);
  transform: translateX(4px);
}

.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.company-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.company-logo {
  height: 26px;
  width: auto;
  object-fit: contain;
  border-radius: 4px;
  background: #fff;
  padding: 2px 6px;
}

.company-logo.bt-logo {
  height: 30px;
}

.timeline-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.timeline-role {
  font-size: 0.95rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.timeline-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-subtle);
  background: var(--bg-surface-elevated);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.timeline-bullets {
  list-style: none;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.timeline-bullets li {
  font-size: 0.925rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 1.4rem;
  line-height: 1.5;
}

.timeline-bullets li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
  font-size: 1rem;
}

/* --- Capabilities & Technical Matrix Section --- */
.capabilities-section {
  background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.skill-category-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
}

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

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.skill-cat-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.skill-cat-icon svg {
  width: 20px;
  height: 20px;
}

.skill-cat-header h3 {
  font-size: 1.125rem;
  font-weight: 700;
}

.skill-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-badge {
  font-size: 0.825rem;
  font-weight: 500;
  padding: 0.35rem 0.8rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.skill-badge:hover {
  background: var(--accent-gradient-subtle);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-1px);
}

/* --- Certifications & Education Section --- */
.certs-section {
  padding: 5.5rem 0;
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.cert-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all var(--transition-normal);
}

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

.cert-img {
  height: 72px;
  width: auto;
  object-fit: contain;
  margin-bottom: 1rem;
  transition: transform var(--transition-fast), filter var(--transition-fast);
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.22));
}

[data-theme="dark"] .cert-img {
  filter: drop-shadow(0 2px 10px rgba(0, 0, 0, 0.55)) drop-shadow(0 0 1px rgba(255, 255, 255, 0.15));
}

.cert-card:hover .cert-img {
  transform: scale(1.08);
  filter: drop-shadow(0 4px 14px rgba(56, 189, 248, 0.3));
}

.cert-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 0.35rem;
}

.cert-issuer {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.cert-verify-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  opacity: 0.85;
  transition: all var(--transition-fast);
}

.cert-card:hover .cert-verify-link {
  opacity: 1;
  text-decoration: underline;
  transform: translateX(2px);
}

/* Education Banner */
.education-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  gap: 1.75rem;
  box-shadow: var(--card-shadow);
}

.edu-logo {
  height: 54px;
  width: auto;
  object-fit: contain;
  background: #fff;
  padding: 4px;
  border-radius: 6px;
}

.edu-info h4 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.edu-info p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* --- Contact & CTA Section --- */
.contact-section {
  background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  padding: 6rem 0;
}

.contact-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 3.5rem 2.5rem;
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
  box-shadow: var(--card-shadow), var(--accent-glow);
  position: relative;
  overflow: hidden;
}

.contact-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.contact-box h2 {
  margin-bottom: 1rem;
}

.contact-box p {
  font-size: 1.075rem;
  max-width: 580px;
  margin: 0 auto 2rem auto;
}

.contact-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.email-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.4rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.email-copy-btn:hover {
  border-color: var(--accent-cyan);
  background: var(--bg-surface-hover);
}

.email-copy-btn svg {
  width: 16px;
  height: 16px;
}

.contact-details {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.contact-detail-item svg {
  width: 16px;
  height: 16px;
  color: var(--accent-cyan);
}

/* --- Footer Redesign --- */
.site-footer {
  background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem 0 calc(2.5rem + env(safe-area-inset-bottom, 0px));
  color: var(--text-muted);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-indigo), transparent);
  opacity: 0.6;
}

.footer-wrapper {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1.6fr;
  gap: 3.5rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 420px;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-main);
}

.footer-tagline {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.footer-nav-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-list li a {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition-fast), transform var(--transition-fast);
  padding: 0.2rem 0;
}

.footer-list li a svg {
  width: 15px;
  height: 15px;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.footer-list li a:hover {
  color: var(--accent-cyan);
  transform: translateX(3px);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
}

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

.footer-copy .footer-privacy {
  margin-top: 0.4rem;
  font-size: 0.775rem;
  opacity: 0.75;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-badge {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-subtle);
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.back-to-top svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.back-to-top:hover {
  background: var(--accent-gradient-subtle);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.back-to-top:hover svg {
  transform: translateY(-2px);
}

/* --- Modal Dialog (Project Previews) --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.modal-overlay.open {
  display: flex;
  opacity: 1;
}

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 820px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--modal-shadow);
  position: relative;
  animation: modalIn 250ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes modalIn {
  from { transform: scale(0.95) translateY(10px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 1.8rem;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.modal-header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.modal-brand img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.modal-brand h3 {
  font-size: 1.25rem;
}

.modal-close {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-main);
  background: var(--bg-surface-hover);
}

.modal-close svg {
  width: 18px;
  height: 18px;
}

.modal-body {
  padding: 1.8rem;
}

/* Carousel in Modal */
.carousel-wrapper {
  position: relative;
  width: 100%;
  margin-bottom: 1.6rem;
}

.carousel-stage {
  position: relative;
  width: 100%;
  height: 380px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  box-shadow: var(--card-shadow);
  display: flex;
  align-items: center;
  justify-content: center;
}

.carousel-track {
  width: 100%;
  height: 100%;
  position: relative;
}

.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 300ms cubic-bezier(0.16, 1, 0.3, 1), transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
  transform: scale(0.98);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.carousel-slide.active {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
  z-index: 1;
}

.carousel-slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: calc(var(--radius-md) - 4px);
  display: block;
}

/* Carousel Navigation Arrows */
.carousel-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-glass-elevated);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-medium);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 3;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.carousel-nav:hover {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  transform: translateY(-50%) scale(1.08);
}

.carousel-nav svg {
  width: 18px;
  height: 18px;
}

.carousel-prev {
  left: 12px;
}

.carousel-next {
  right: 12px;
}

.carousel-counter {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--bg-glass-elevated);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  z-index: 3;
}

/* Carousel Dots */
.carousel-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--border-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  padding: 0;
}

.carousel-dot:hover {
  background: var(--text-muted);
}

.carousel-dot.active {
  width: 22px;
  background: var(--accent-cyan);
}

@media (max-width: 600px) {
  .carousel-stage {
    height: 240px;
  }
}

.modal-details h4 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.modal-details p {
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.modal-feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.modal-feature-list li {
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-feature-list li::before {
  content: '✓';
  color: var(--accent-emerald);
  font-weight: 700;
}

.modal-footer {
  padding: 1.25rem 1.8rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  background: var(--bg-surface-elevated);
  border-bottom-left-radius: var(--radius-xl);
  border-bottom-right-radius: var(--radius-xl);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 0.8rem 1.25rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  z-index: 2000;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all var(--transition-normal);
}

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

.toast svg {
  width: 18px;
  height: 18px;
  color: var(--accent-emerald);
}

/* --- Micro-Animations / Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1), transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger Delay utilities */
.delay-1 { transition-delay: 100ms; }
.delay-2 { transition-delay: 200ms; }
.delay-3 { transition-delay: 300ms; }
.delay-4 { transition-delay: 400ms; }

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
  .hero-pill {
    animation: none !important;
  }
  .portrait-card {
    animation: none !important;
  }
}

/* --- Responsive Breakpoints --- */

/* Tablet Landscape & Laptops (<= 1024px) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .metrics-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .certs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tablets Portrait & Large Handhelds (<= 768px) */
@media (max-width: 768px) {
  /* Section Spacing & Containers */
  section {
    padding: 3.5rem 0;
  }
  .hero-section {
    padding-top: 2rem;
    padding-bottom: 3.5rem;
  }
  .impact-section {
    padding: 2rem 0 3.5rem;
  }
  .section-header {
    margin-bottom: 2.25rem;
  }
  .container {
    padding: 0 1.25rem;
  }

  /* Mobile Navigation Drawer */
  .mobile-toggle {
    display: flex;
  }
  .nav-links {
    display: flex;
    position: absolute;
    top: calc(72px + env(safe-area-inset-top, 0px));
    left: 0;
    width: 100%;
    max-height: calc(100vh - 72px - env(safe-area-inset-top, 0px));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: var(--bg-surface-elevated);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-medium);
    padding: 1rem 1.25rem 1.5rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 220ms ease, transform 220ms ease;
    z-index: 95;
  }
  .nav-links.mobile-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links a {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    width: 100%;
    min-height: 46px;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
  }
  .nav-links a:hover,
  .nav-links a.active {
    color: var(--accent-cyan);
    background: var(--bg-surface-hover);
    padding-left: 1.25rem;
  }
  .nav-links a::after {
    display: none;
  }
  .nav-icon {
    width: 17px;
    height: 17px;
  }

  /* Grid Layouts */
  .products-grid,
  .skills-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .product-card {
    padding: 1.35rem;
  }
  .skill-category-card {
    padding: 1.35rem;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem;
  }
  .metric-card {
    padding: 1.35rem 0.85rem 1.2rem;
  }
  .metric-val {
    font-size: clamp(1.9rem, 8vw, 2.3rem);
  }
  .metric-card > span:not(.metric-val) {
    font-size: 0.8rem;
  }

  /* Experience Timeline */
  .timeline-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .timeline-card {
    padding: 1.35rem;
  }

  /* Certifications & Education */
  .education-card {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    padding: 1.35rem;
  }

  /* Contact & CTA */
  .contact-box {
    padding: 2.75rem 1.5rem;
  }
  .contact-details {
    flex-direction: column;
    gap: 0.85rem;
    align-items: center;
  }

  /* Modal Dialog */
  .modal-feature-list {
    grid-template-columns: 1fr;
  }

  /* Redesigned Footer Responsive */
  .site-footer {
    padding: 3.5rem 0 calc(2rem + env(safe-area-inset-bottom, 0px));
  }
  .footer-wrapper {
    gap: 2.5rem;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .footer-brand {
    max-width: 100%;
  }
  .footer-nav-grid {
    gap: 2rem;
  }
  .footer-list li a {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
    padding-top: 1.5rem;
  }
}

/* Medium Phones & Compact Handhelds (<= 640px) */
@media (max-width: 640px) {
  /* Timeline Compact Layout */
  .timeline::before {
    left: 14px;
  }
  .timeline-item {
    padding-left: 42px;
    margin-bottom: 2.25rem;
  }
  .timeline-node {
    left: 3px;
    width: 22px;
    height: 22px;
    top: 2px;
  }
  .timeline-bullets {
    padding-left: 1rem;
  }

  /* Filter Tabs */
  .filter-tabs {
    gap: 0.4rem;
    margin-bottom: 1.75rem;
  }
  .tab-btn {
    padding: 0.5rem 0.95rem;
    font-size: 0.825rem;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }

  /* Modal Dialog */
  .modal-overlay {
    padding: 0.75rem 0.5rem;
  }
  .modal-card {
    max-height: 94vh;
    border-radius: var(--radius-lg);
  }
  .modal-header {
    padding: 1rem 1.25rem;
  }
  .modal-body {
    padding: 1.25rem;
  }
  .carousel-stage {
    height: 220px;
  }
  .carousel-nav {
    width: 44px;
    height: 44px;
  }
  /* Four items competed for one row: the badge wrapped inside its own pill and
     the title was squeezed. Let the header wrap, keep the close button beside
     the title, and push the badge onto its own line at natural width. */
  .modal-header {
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.6rem 0.75rem;
  }
  .modal-header-actions {
    display: contents;
  }
  .modal-brand {
    order: 1;
    flex: 1 1 auto;
    min-width: 0;
  }
  .modal-close {
    order: 2;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
  }
  /* forced line break so the pill keeps its own width instead of stretching */
  .modal-header::after {
    content: '';
    order: 3;
    flex-basis: 100%;
    height: 0;
  }
  .badge-live,
  .badge-soon {
    order: 4;
  }
  .modal-footer {
    padding: 1rem 1.25rem;
    flex-direction: column-reverse;
    gap: 0.6rem;
  }
  .modal-footer .btn {
    width: 100%;
    justify-content: center;
  }

  /* Toast Notification */
  .toast {
    bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    left: 16px;
    right: 16px;
    justify-content: center;
    max-width: calc(100% - 32px);
  }
}

/* Small Phones (<= 480px) */
@media (max-width: 480px) {
  /* Typography & Hero */
  .hero-title {
    font-size: 1.85rem;
    line-height: 1.25;
  }
  .hero-pitch {
    font-size: 0.95rem;
    line-height: 1.6;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }
  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
  /* Scale the whole card; the layered positions are percentage-based on the card box. */
  .portrait-visual {
    --portrait-scale: 0.82;
  }

  /* Certifications Grid */
  .certs-grid {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }
  .cert-card {
    padding: 1.2rem;
  }

  /* Products Cards */
  .product-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }
  .product-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }
  .action-links {
    justify-content: space-between;
    width: 100%;
  }
  .preview-btn {
    width: 100%;
    justify-content: center;
    min-height: 40px;
  }

  /* Contact Section */
  .contact-actions {
    flex-direction: column;
    width: 100%;
  }
  .contact-actions .btn {
    width: 100%;
    justify-content: center;
  }
  .email-copy-btn {
    width: 100%;
    justify-content: center;
    font-size: 0.825rem;
    word-break: break-all;
    min-height: 44px;
    padding: 0.75rem 1rem;
  }

  /* Footer Mobile Layout */
  .site-footer {
    padding: 3rem 0 calc(2rem + env(safe-area-inset-bottom, 0px));
  }
  .footer-nav-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    align-items: stretch;
    text-align: center;
  }
  .footer-copy p {
    text-align: center;
  }
  .footer-meta {
    justify-content: center;
    flex-direction: column;
    gap: 0.85rem;
    width: 100%;
  }
  .back-to-top {
    width: 100%;
    justify-content: center;
    min-height: 44px;
  }
}

/* Extra-Compact Screens (<= 400px) */
@media (max-width: 400px) {
  .nav-container {
    padding: 0 0.85rem;
  }
  .brand-link {
    font-size: 1rem;
    gap: 0.5rem;
  }
  .brand-monogram {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }
  .nav-actions {
    gap: 0.4rem;
  }
  .nav-actions .btn-sm {
    padding: 0.35rem 0.65rem;
    font-size: 0.75rem;
    gap: 0.3rem;
  }
  .theme-toggle {
    width: 36px;
    height: 36px;
  }
  .mobile-toggle {
    width: 40px;
    height: 40px;
  }
}

/* Narrowest Handhelds / Foldables (<= 360px) */
@media (max-width: 360px) {
  .container {
    padding: 0 0.85rem;
  }
  .portrait-visual {
    --portrait-scale: 0.72;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  .brand-link span {
    font-size: 0.9rem;
  }
  .hero-title {
    font-size: 1.65rem;
  }
  .footer-tagline {
    font-size: 0.875rem;
  }
  .footer-status {
    font-size: 0.75rem;
  }
}