/* ==========================================================================
   Paul Rajeevan — Modern Single-Page Static Portfolio Stylesheet
   Crafted with Vanilla CSS, Design Tokens, Glassmorphism, and Fluid UX
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design System & CSS Custom Properties (Theme Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;

  /* Common Spacing & Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.45s cubic-bezier(0.16, 1, 0.3, 1);

  /* Primary Theme Hues (Emerald / Teal / Gold Signature) */
  --primary: #00876c;
  --primary-hover: #00a887;
  --primary-rgb: 0, 135, 108;
  --primary-deep: #004d40;
  --primary-light: rgba(0, 135, 108, 0.12);

  --accent-gold: #ffde59;
  --accent-gold-rgb: 255, 222, 89;
  --accent-gold-dark: #e6c53e;

  --accent-red: #ef4444;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-glass: rgba(255, 255, 255, 0.78);
  --bg-card: #ffffff;
  --bg-card-hover: #fbfdfc;
  --bg-input: #f8fafc;

  --border-subtle: #e2e8f0;
  --border-card: #e2e8f0;
  --border-focus: rgba(0, 135, 108, 0.45);

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

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 36px rgba(15, 23, 42, 0.09);
  --shadow-glow: 0 0 40px rgba(0, 135, 108, 0.15);

  --nav-backdrop: rgba(255, 255, 255, 0.85);
  --ambient-1: rgba(0, 77, 64, 0.06);
  --ambient-2: rgba(255, 222, 89, 0.05);
  --ambient-3: rgba(14, 165, 233, 0.04);
}

/* Dark Theme Variables (Default) */
[data-theme="dark"] {
  --bg-body: #080f0d;
  --bg-surface: #0f1c19;
  --bg-surface-elevated: #152622;
  --bg-surface-glass: rgba(15, 28, 25, 0.75);
  --bg-card: #0d1a17;
  --bg-card-hover: #122320;
  --bg-input: #091311;

  --border-subtle: #19332c;
  --border-card: #172d27;
  --border-focus: rgba(0, 180, 148, 0.55);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-invert: #091311;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 18px 45px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 50px rgba(0, 180, 148, 0.22);

  --nav-backdrop: rgba(8, 15, 13, 0.82);
  --ambient-1: rgba(0, 180, 148, 0.12);
  --ambient-2: rgba(255, 222, 89, 0.05);
  --ambient-3: rgba(16, 185, 129, 0.08);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: light dark;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* --------------------------------------------------------------------------
   3. Ambient Decorative Backgrounds
   -------------------------------------------------------------------------- */
.ambient-glow {
  position: fixed;
  border-radius: var(--radius-full);
  filter: blur(130px);
  pointer-events: none;
  z-index: -2;
  opacity: 0.85;
}

.ambient-glow-1 {
  top: -100px;
  right: -100px;
  width: 550px;
  height: 550px;
  background: var(--ambient-1);
}

.ambient-glow-2 {
  bottom: 20%;
  left: -150px;
  width: 600px;
  height: 600px;
  background: var(--ambient-2);
}

.ambient-glow-3 {
  top: 45%;
  right: 5%;
  width: 350px;
  height: 350px;
  background: var(--ambient-3);
}

.grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.035;
  background-image: radial-gradient(var(--primary) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* --------------------------------------------------------------------------
   4. Layout Containers & Utility Classes
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding-top: 5.5rem;
  padding-bottom: 5.5rem;
  position: relative;
}

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

.section-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--primary);
  margin-bottom: 0.65rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.section-decor {
  width: 64px;
  height: 4px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--primary), var(--accent-gold));
  margin: 1rem auto 1.5rem auto;
}

.section-lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  font-weight: 500;
}

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

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

.highlight-text {
  color: var(--primary);
  border-bottom: 3px solid var(--primary);
  padding-bottom: 2px;
}

.highlight-accent {
  color: var(--primary);
}

.text-gradient {
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* --------------------------------------------------------------------------
   5. Buttons & Badges
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.6rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  user-select: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(var(--primary-rgb), 0.3);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: 0 6px 24px rgba(var(--primary-rgb), 0.45);
  transform: translateY(-2px);
}

.btn-accent {
  background-color: var(--accent-gold);
  color: #0b1a16;
  box-shadow: 0 4px 18px rgba(var(--accent-gold-rgb), 0.28);
}

.btn-accent:hover {
  background-color: var(--accent-gold-dark);
  box-shadow: 0 6px 24px rgba(var(--accent-gold-rgb), 0.4);
  transform: translateY(-2px);
}

.btn-glass {
  background-color: var(--bg-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

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

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

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

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.05rem;
  border-radius: 16px;
}

.btn-sm {
  padding: 0.55rem 1.1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

.btn-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background-color: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

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

/* Badge Pill */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1rem;
  background-color: var(--primary-light);
  border: 1px solid rgba(var(--primary-rgb), 0.25);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  backdrop-filter: blur(8px);
}

.badge-pill.sm {
  font-size: 0.7rem;
  padding: 0.35rem 0.8rem;
  margin-bottom: 0.85rem;
}

.pulse-dot {
  position: relative;
  display: flex;
  width: 8px;
  height: 8px;
}

.pulse-dot .ping {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background-color: var(--primary);
  opacity: 0.75;
  animation: ping 1.8s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.pulse-dot .dot {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--primary);
}

@keyframes ping {
  75%, 100% {
    transform: scale(2.4);
    opacity: 0;
  }
}

/* --------------------------------------------------------------------------
   6. Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  height: 76px;
  background-color: var(--nav-backdrop);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  height: 68px;
  box-shadow: var(--shadow-md);
}

.header-container {
  max-width: 1220px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-icon-wrap {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base);
}

.brand-logo:hover .brand-icon-wrap {
  transform: scale(1.08) rotate(-4deg);
  border-color: var(--primary);
}

.brand-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* Desktop Nav */
.desktop-nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

@media (min-width: 900px) {
  .desktop-nav {
    display: flex;
  }
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  position: relative;
  padding: 0.35rem 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

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

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

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

/* Theme Toggle Button Logic */
[data-theme="dark"] .light-icon {
  display: inline-block;
}
[data-theme="dark"] .dark-icon {
  display: none;
}
[data-theme="light"] .light-icon {
  display: none;
}
[data-theme="light"] .dark-icon {
  display: inline-block;
}

.header-cta {
  display: none;
}

@media (min-width: 640px) {
  .header-cta {
    display: inline-flex;
  }
}

/* Mobile Hamburger Button */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

@media (min-width: 900px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.menu-bar {
  width: 20px;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* --------------------------------------------------------------------------
   7. Mobile Navigation Drawer
   -------------------------------------------------------------------------- */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 1000;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.3s, opacity 0.3s;
}

.mobile-drawer.open {
  visibility: visible;
  opacity: 1;
}

.drawer-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
}

.drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 82%;
  max-width: 340px;
  height: 100%;
  background-color: var(--bg-surface);
  border-left: 1px solid var(--border-subtle);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}

.mobile-drawer.open .drawer-panel {
  transform: translateX(0);
}

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

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.75rem;
  margin-bottom: 2rem;
}

.drawer-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.drawer-link i {
  color: var(--primary);
  width: 22px;
  font-size: 1.05rem;
}

.drawer-link:hover,
.drawer-link.active {
  background-color: var(--primary-light);
  color: var(--primary);
  transform: translateX(4px);
}

.drawer-footer {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.drawer-socials {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.drawer-socials a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.drawer-socials a:hover {
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   8. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding-top: 3.5rem;
  padding-bottom: 4rem;
  position: relative;
}

.hero-container {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 3rem;
}

@media (min-width: 900px) {
  .hero-container {
    flex-direction: row;
    justify-content: space-between;
    gap: 4rem;
  }
}

.hero-content {
  flex: 1;
  text-align: center;
}

@media (min-width: 900px) {
  .hero-content {
    text-align: left;
  }
}

.hero-badge {
  margin-bottom: 1.5rem;
}

.hero-greeting {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 2.5vw, 2.2rem);
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.75rem, 5.5vw, 5rem);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin-bottom: 0.85rem;
}

.hero-subtitle {
  font-family: var(--font-heading);
  font-size: clamp(1.15rem, 2vw, 1.85rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: clamp(1rem, 1.2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 2.25rem;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 900px) {
  .hero-description {
    margin-left: 0;
    margin-right: 0;
  }
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.25rem;
}

@media (min-width: 900px) {
  .hero-cta-group {
    justify-content: flex-start;
  }
}

/* Hero Socials Row */
.hero-socials-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
}

@media (min-width: 900px) {
  .hero-socials-wrapper {
    justify-content: flex-start;
  }
}

.socials-label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
}

.social-icon-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.social-circle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.1rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.social-circle:hover {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(var(--primary-rgb), 0.35);
}

.social-circle.linkedin:hover {
  background-color: #0077b5;
  border-color: #0077b5;
}

.social-circle.github:hover {
  background-color: #24292e;
  border-color: #24292e;
}

.social-circle.youtube:hover {
  background-color: #dc2626;
  border-color: #dc2626;
}

/* Hero Avatar Visual Frame */
.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

@media (min-width: 900px) {
  .hero-visual {
    justify-content: flex-end;
  }
}

.avatar-card-wrapper {
  position: relative;
  width: clamp(260px, 32vw, 420px);
  aspect-ratio: 1 / 1;
}

.avatar-halo {
  position: absolute;
  inset: -15px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--accent-gold), #14b8a6);
  opacity: 0.45;
  filter: blur(28px);
  z-index: 0;
  animation: pulse-halo 6s ease-in-out infinite alternate;
}

@keyframes pulse-halo {
  0% { transform: scale(0.96); opacity: 0.35; }
  100% { transform: scale(1.04); opacity: 0.55; }
}

.avatar-ring-frame {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  padding: 6px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-gold) 60%, #10b981 100%);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-slow);
}

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

.avatar-inner-wrap {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 6px solid var(--bg-surface);
  background-color: var(--bg-surface-elevated);
}

.hero-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.6s ease;
}

.avatar-ring-frame:hover .hero-avatar-img {
  transform: scale(1.05);
}

/* Online Pulse Status */
.status-indicator {
  position: absolute;
  bottom: 8%;
  right: 8%;
  width: 28px;
  height: 28px;
  z-index: 10;
}

.indicator-ping {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background-color: #22c55e;
  opacity: 0.75;
  animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.indicator-core {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  background-color: #22c55e;
  border: 4px solid var(--bg-surface);
  box-shadow: 0 0 10px rgba(34, 197, 94, 0.6);
}

/* Floating Mini Badges */
.floating-badge {
  position: absolute;
  z-index: 12;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.1rem;
  background-color: var(--bg-surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  animation: float-gentle 4s ease-in-out infinite alternate;
}

.badge-top-left {
  top: 8%;
  left: -20px;
}

.badge-bottom-right {
  bottom: 6%;
  left: -15px;
  animation-delay: 2s;
}

@media (max-width: 600px) {
  .floating-badge {
    display: none;
  }
}

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

.floating-badge .badge-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.floating-badge .badge-text {
  display: flex;
  flex-direction: column;
}

.floating-badge .badge-title {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

.floating-badge .badge-sub {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* Metrics Bar */
.hero-metrics-container {
  margin-top: 3.5rem;
}

.metrics-grid {
  background-color: var(--bg-surface-glass);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 1.75rem 2rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
  .metrics-grid {
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    align-items: center;
    gap: 1.5rem;
  }
}

.metric-card {
  text-align: center;
}

.metric-num {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 2.8vw, 2.5rem);
  font-weight: 900;
  color: var(--primary);
  line-height: 1.1;
  margin-bottom: 0.2rem;
}

.metric-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.metric-divider {
  display: none;
  width: 1px;
  height: 48px;
  background-color: var(--border-subtle);
}

@media (min-width: 768px) {
  .metric-divider {
    display: block;
  }
}

/* --------------------------------------------------------------------------
   9. About & Pillars Section
   -------------------------------------------------------------------------- */
.pillars-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  margin-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .pillars-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pillar-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 340px;
  border: 1px solid var(--border-card);
  transition: all var(--transition-slow);
  box-shadow: var(--shadow-sm);
}

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

/* Color thematic cards */
.pillar-card.card-teal {
  background: linear-gradient(145deg, #004d40 0%, #002e26 100%);
  color: #ffffff;
}

.pillar-card.card-dark {
  background: linear-gradient(145deg, #002722 0%, #001512 100%);
  color: #ffffff;
}

.pillar-card.card-gold {
  background: linear-gradient(145deg, #0f2c25 0%, #004d40 100%);
  color: #ffffff;
}

.pillar-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background-color: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: #ffffff;
  margin-bottom: 2rem;
  transition: transform var(--transition-fast);
}

.pillar-card:hover .pillar-icon-wrap {
  transform: scale(1.1) rotate(6deg);
}

.pillar-card.card-gold .pillar-icon-wrap {
  color: var(--accent-gold);
}

.pillar-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.pillar-text {
  font-size: 1rem;
  opacity: 0.85;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.pillar-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  margin-top: auto;
  transition: gap var(--transition-fast);
}

.pillar-link:hover {
  gap: 0.85rem;
}

/* Methodology Highlight Card */
.methodology-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 900px) {
  .methodology-card {
    flex-direction: row;
    padding: 3.5rem 4rem;
  }
}

.methodology-body {
  flex: 1;
}

.methodology-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.methodology-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.75rem;
}

.methodology-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  background-color: var(--primary-light);
  border: 1px solid rgba(var(--primary-rgb), 0.2);
  color: var(--primary);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.methodology-graphic {
  display: flex;
  align-items: center;
  justify-content: center;
}

.chip-frame {
  width: 140px;
  height: 140px;
  border-radius: 36px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: var(--shadow-md);
}

.chip-icon {
  font-size: 3.5rem;
  color: var(--primary);
}

/* Dual Column Grid (Mission & Tech Focus) */
.dual-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 768px) {
  .dual-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.glass-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.glass-card:hover {
  border-color: rgba(var(--primary-rgb), 0.35);
  transform: translateY(-4px);
}

.card-header-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.icon-bubble {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.icon-bubble.red {
  background-color: rgba(239, 68, 68, 0.12);
  color: var(--accent-red);
}

.icon-bubble.primary {
  background-color: var(--primary-light);
  color: var(--primary);
}

.subcard-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.check-list,
.arrow-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.check-list li,
.arrow-list li {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.check-list li i {
  color: var(--primary);
  font-size: 1.15rem;
}

.arrow-list li i {
  color: var(--primary);
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   10. The Power Stack (Skills & Technologies)
   -------------------------------------------------------------------------- */
.category-tabs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  margin-bottom: 2.75rem;
}

.tab-btn {
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
  background-color: var(--primary-light);
}

.tab-btn.active {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(var(--primary-rgb), 0.35);
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

@media (min-width: 640px) {
  .stack-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .stack-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.tech-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.tech-card.hidden {
  display: none !important;
}

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

.tech-icon {
  font-size: 2.5rem;
  color: var(--primary);
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
}

.tech-card:hover .tech-icon {
  transform: scale(1.15);
}

.tech-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
}

.tech-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
}

/* Stack Inquiry Banner */
.stack-inquiry-box {
  background-color: var(--bg-surface-glass);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 2rem 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .stack-inquiry-box {
    flex-direction: row;
    text-align: left;
    justify-content: space-between;
  }
}

.inquiry-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.inquiry-info {
  flex: 1;
}

.inquiry-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.inquiry-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   11. Featured Projects Section
   -------------------------------------------------------------------------- */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

.project-card.hidden {
  display: none !important;
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: rgba(var(--primary-rgb), 0.4);
  box-shadow: var(--shadow-lg);
}

.project-card-banner {
  height: 140px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.banner-emerald {
  background: linear-gradient(135deg, #004d40 0%, #00796b 100%);
}
.banner-gold {
  background: linear-gradient(135deg, #b45309 0%, #d97706 100%);
}
.banner-dark {
  background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
}
.banner-teal {
  background: linear-gradient(135deg, #0f766e 0%, #14b8a6 100%);
}
.banner-purple {
  background: linear-gradient(135deg, #4c1d95 0%, #6d28d9 100%);
}
.banner-blue {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
}

.project-category-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  color: #ffffff;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project-banner-icon {
  font-size: 3.5rem;
  color: rgba(255, 255, 255, 0.25);
  transition: transform var(--transition-fast);
}

.project-card:hover .project-banner-icon {
  transform: scale(1.15) rotate(5deg);
  color: rgba(255, 255, 255, 0.45);
}

.project-card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
  font-size: 0.78rem;
  font-weight: 700;
}

.project-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project-status i {
  font-size: 0.5rem;
}

.project-stars {
  color: var(--text-muted);
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: -0.015em;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.project-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.tag {
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
}

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

.project-actions .btn {
  flex: 1;
}

/* --------------------------------------------------------------------------
   12. Call to Action Banner
   -------------------------------------------------------------------------- */
.cta-section {
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.cta-banner-card {
  position: relative;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #004d40 0%, #002822 100%);
  color: #ffffff;
  padding: 4rem 2rem;
  text-align: center;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

@media (min-width: 768px) {
  .cta-banner-card {
    padding: 5.5rem 3.5rem;
  }
}

.cta-ambient-glow {
  position: absolute;
  top: -50px;
  right: -50px;
  width: 320px;
  height: 320px;
  border-radius: var(--radius-full);
  background: rgba(255, 222, 89, 0.15);
  filter: blur(80px);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 0 auto;
}

.cta-badge {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  margin-bottom: 1.5rem;
}

.cta-heading {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4.5vw, 3.75rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.cta-paragraph {
  font-size: 1.15rem;
  opacity: 0.85;
  line-height: 1.6;
  margin-bottom: 2.5rem;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
}

/* --------------------------------------------------------------------------
   13. Contact Section
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  max-width: 1140px;
  margin: 0 auto;
}

@media (min-width: 860px) {
  .contact-grid {
    grid-template-columns: 1.25fr 1fr 1fr;
  }
}

.contact-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  position: relative;
}

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

.contact-card.card-featured {
  border-color: rgba(var(--primary-rgb), 0.35);
  background: linear-gradient(145deg, var(--bg-card) 60%, rgba(var(--primary-rgb), 0.05) 100%);
}

.card-kicker {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary);
  margin-bottom: 0.35rem;
}

.card-icon-bubble {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.card-icon-bubble.primary {
  background-color: var(--primary-light);
  color: var(--primary);
}

.card-icon-bubble.blue {
  background-color: rgba(59, 130, 246, 0.12);
  color: #0077b5;
}

.card-icon-bubble.green {
  background-color: rgba(34, 197, 94, 0.12);
  color: #16a34a;
}

.card-content-block {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-heading {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.card-location-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.card-primary-link {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  display: block;
  margin-bottom: 0.65rem;
  word-break: break-all;
}

.card-primary-link:hover {
  text-decoration: underline;
}

.card-subtext {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex: 1;
}

.contact-btn-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-top: auto;
}

.contact-social-grid {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: auto;
}

.social-tag {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-tag i.external-icon {
  font-size: 0.72rem;
  opacity: 0.6;
}

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

.availability-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-md);
  background-color: var(--primary-light);
  border: 1px solid rgba(var(--primary-rgb), 0.2);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  margin-top: auto;
}

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding-top: 4.5rem;
  padding-bottom: 3rem;
  margin-top: 3rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .footer-top-grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
  }
}

.footer-brand-col .brand-logo {
  margin-bottom: 1.25rem;
}

.footer-bio {
  font-size: 1rem;
  color: var(--text-secondary);
  font-style: italic;
  max-width: 420px;
  line-height: 1.6;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

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

.footer-nav-list a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-nav-list a:hover {
  color: var(--primary);
}

.footer-social-row {
  display: flex;
  gap: 0.75rem;
}

.footer-bottom-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (min-width: 640px) {
  .footer-bottom-bar {
    flex-direction: row;
  }
}

.footer-extra-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-text-btn {
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--transition-fast);
}

.footer-text-btn:hover {
  color: var(--primary);
}

/* --------------------------------------------------------------------------
   15. Floating Scroll to Top Button
   -------------------------------------------------------------------------- */
.scroll-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: var(--primary);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: all var(--transition-base);
  z-index: 99;
}

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

.scroll-top-btn:hover {
  background-color: var(--primary-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(var(--primary-rgb), 0.55);
}

/* --------------------------------------------------------------------------
   16. Modals
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.28s ease;
}

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

.modal-dialog {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.94) translateY(10px);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.active .modal-dialog {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
}

.modal-tag-pill {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background-color: var(--primary-light);
  color: var(--primary);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.modal-close-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: 2rem;
}

.modal-heading {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}

.modal-paragraph {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.75rem;
}

.modal-detail-section {
  margin-bottom: 1.75rem;
}

.modal-subheading {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

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

.modal-bullet-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.modal-bullet-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

.legal-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.modal-actions-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   17. Toast Notifications
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--primary);
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  animation: toast-in 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.toast i {
  color: var(--primary);
  font-size: 1.15rem;
}

.toast.toast-error {
  border-left-color: var(--accent-red);
}

.toast.toast-error i {
  color: var(--accent-red);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(20px);
  }
}