/* ==========================================================================
   Design System & Modern CSS: Mailson Maia Alves Portfolio
   Lighthouse 100/100 Optimized - Zero External Dependencies
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & CSS Custom Properties
   -------------------------------------------------------------------------- */
:root,
[data-theme="dark"] {
  --bg-primary: #0b1120;
  --bg-secondary: #111c34;
  --bg-card: #172445;
  --bg-card-hover: #1e305b;
  --bg-input: #0b1120;
  --border-color: #243560;
  --border-hover: #38bdf8;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  --accent: #38bdf8;
  --accent-hover: #0ea5e9;
  --accent-glow: rgba(56, 189, 248, 0.15);
  
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.12);

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), 
               background-color 0.25s cubic-bezier(0.4, 0, 0.2, 1), 
               border-color 0.25s cubic-bezier(0.4, 0, 0.2, 1), 
               box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1), 
               color 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #f1f5f9;
  --bg-card-hover: #e2e8f0;
  --bg-input: #ffffff;
  --border-color: #cbd5e1;
  --border-hover: #0284c7;

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #475569;

  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-glow: rgba(2, 132, 199, 0.12);

  --success: #059669;
  --success-bg: rgba(5, 150, 105, 0.1);
  --error: #dc2626;
  --error-bg: rgba(220, 38, 38, 0.1);

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 10px;
  background: var(--accent);
  color: #0b1120;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 10000;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 10px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section[id] {
  scroll-margin-top: 80px;
}

/* --------------------------------------------------------------------------
   3. Header & Navigation (Glassmorphism & Fixed)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(11, 17, 32, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

[data-theme="light"] .site-header {
  background-color: rgba(255, 255, 255, 0.85);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.brand-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.5px;
  transition: var(--transition);
}
.brand-logo:hover {
  color: var(--accent-hover);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.75rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  padding: 0.35rem 0;
  position: relative;
}
.nav-link:hover {
  color: var(--accent);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width 0.2s ease;
}
.nav-link:hover::after {
  width: 100%;
}

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

.btn-icon {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  min-width: 48px;
  min-height: 48px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.15rem;
  transition: var(--transition);
}
.btn-icon:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: none;
}

.select-lang {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  min-height: 48px;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.select-lang:hover, .select-lang:focus {
  border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   4. Buttons & Core Components
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--accent);
  color: #0b1120;
}
[data-theme="light"] .btn-primary {
  color: #ffffff;
}
.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}

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

.btn-block {
  width: 100%;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* --------------------------------------------------------------------------
   5. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding: 6rem 0 5rem;
  min-height: calc(85vh - 70px);
  display: flex;
  align-items: center;
  background: radial-gradient(circle at 50% 30%, var(--accent-glow) 0%, transparent 60%);
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-avatar {
  margin-bottom: 2rem;
  position: relative;
}

.avatar-img {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  box-shadow: 0 0 30px var(--accent-glow), var(--shadow-lg);
  transition: var(--transition);
}

.avatar-img:hover {
  transform: scale(1.05);
  border-color: var(--accent-hover);
  box-shadow: 0 0 40px var(--accent-glow);
}

.hero-greeting {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.75rem;
  display: inline-block;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 0.75rem;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.6rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-desc {
  max-width: 720px;
  color: var(--text-secondary);
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* --------------------------------------------------------------------------
   6. About Section
   -------------------------------------------------------------------------- */
.about-section {
  padding: 5rem 0;
  background-color: var(--bg-secondary);
  content-visibility: auto;
  contain-intrinsic-size: auto 650px;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 1.75rem;
}

.about-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: var(--radius-lg);
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.about-card.highlight {
  border-left: 4px solid var(--accent);
}

/* --------------------------------------------------------------------------
   7. Skills Matrix Section
   -------------------------------------------------------------------------- */
.skills-section {
  padding: 5rem 0;
  content-visibility: auto;
  contain-intrinsic-size: auto 650px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 1.75rem;
}

@media (min-width: 992px) {
  .skills-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.skill-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2.25rem 1.75rem;
  border-radius: var(--radius-lg);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.skill-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: var(--accent);
  margin-bottom: 1.25rem;
  transition: var(--transition);
}

.skill-card:hover .icon-badge,
.service-card:hover .icon-badge {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--accent);
  transform: scale(1.08);
  box-shadow: 0 0 16px var(--accent-glow);
}

.icon-svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

.icon-svg-btn {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  display: inline-block;
  vertical-align: middle;
}

.skill-icon {
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
}

.skill-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.skill-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   8. Projects Showcase & Filters
   -------------------------------------------------------------------------- */
.projects-section {
  padding: 5rem 0;
  background-color: var(--bg-secondary);
  content-visibility: auto;
  contain-intrinsic-size: auto 650px;
}

.projects-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 3rem;
}

.filter-btn {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  min-height: 44px;
  padding: 0.6rem 1.25rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent);
}
.filter-btn.active {
  background-color: var(--accent);
  color: #0b1120;
  border-color: var(--accent);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 2rem;
}

.project-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}

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

.project-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.35;
}

.project-category-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  background-color: var(--accent-glow);
  color: var(--accent);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

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

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: var(--bg-primary);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.project-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-project {
  font-size: 0.85rem;
  font-weight: 600;
  min-height: 44px;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
}

.btn-github {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-github:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-docs, .btn-live {
  background-color: var(--accent-glow);
  color: var(--accent);
  border: 1px solid transparent;
}
.btn-docs:hover, .btn-live:hover {
  background-color: var(--accent);
  color: #0b1120;
}

/* --------------------------------------------------------------------------
   9. Services Section
   -------------------------------------------------------------------------- */
.services-section {
  padding: 5rem 0;
  content-visibility: auto;
  contain-intrinsic-size: auto 650px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 1.75rem;
}

@media (min-width: 992px) {
  .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.service-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2.25rem 1.75rem;
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.service-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.service-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.service-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   10. Contact Section
   -------------------------------------------------------------------------- */
.contact-section {
  padding: 5rem 0;
  background-color: var(--bg-secondary);
  content-visibility: auto;
  contain-intrinsic-size: auto 650px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.contact-subtitle {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.contact-direct-desc {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.direct-channels {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.btn-direct {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-direct:hover {
  transform: translateX(4px);
  border-color: var(--accent);
}
.btn-icon-symbol {
  font-size: 1.3rem;
}

.btn-whatsapp:hover {
  border-color: #25d366;
  color: #25d366;
}
.btn-linkedin:hover {
  border-color: #0a66c2;
  color: #0a66c2;
}
.btn-email:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.contact-form-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-secondary);
}

.form-input, .form-textarea {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
}
.form-input:focus, .form-textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.status-msg {
  margin-top: 1.25rem;
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
}
.status-msg.hidden {
  display: none;
}
.status-msg.success {
  background-color: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success);
}
.status-msg.error {
  background-color: var(--error-bg);
  color: var(--error);
  border: 1px solid var(--error);
}

.form-privacy-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.85rem;
  text-align: center;
  line-height: 1.4;
}

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-tech {
  color: var(--text-muted);
  font-size: 0.825rem;
}

/* --------------------------------------------------------------------------
   12. Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: rgba(11, 17, 32, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    gap: 1.25rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
    pointer-events: none;
    box-shadow: var(--shadow-lg);
  }

  [data-theme="light"] .nav-links {
    background-color: rgba(255, 255, 255, 0.98);
  }

  .nav-links.mobile-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.3rem;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .contact-form-container {
    padding: 1.5rem;
  }
}

/* --------------------------------------------------------------------------
   13. Animations, Background Effects & Micro-Interactions (Atekita-Inspired)
   -------------------------------------------------------------------------- */

/* Cyber Tech Blueprint / Dot Matrix Background Texture */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    radial-gradient(rgba(0, 242, 254, 0.08) 1px, transparent 1px),
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 32px 32px, 64px 64px, 64px 64px;
  pointer-events: none;
  z-index: -1;
  mask-image: radial-gradient(circle at 50% 40%, black 30%, rgba(0,0,0,0.4) 80%, transparent 100%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, black 30%, rgba(0,0,0,0.4) 80%, transparent 100%);
}

/* Hero Canvas Particles & Background Overlay */
.hero-section {
  position: relative;
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(180deg, rgba(11, 17, 32, 0.7) 0%, rgba(11, 17, 32, 0.95) 100%), url('../img/background.webp');
  background-size: cover;
  background-position: center 30%;
  opacity: 0.28;
  pointer-events: none;
  z-index: 0;
  mix-blend-mode: luminosity;
}

#hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.75;
}

.hero-container {
  position: relative;
  z-index: 2;
}

/* Ambient Floating Background Glow Orbs */
.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  animation: floatGlow 14s ease-in-out infinite alternate;
}

.glow-hero-1 {
  top: 10%;
  right: -5%;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  opacity: 0.6;
}

.glow-hero-2 {
  bottom: 5%;
  left: -5%;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, rgba(0, 230, 118, 0.15) 0%, transparent 70%);
  opacity: 0.5;
  animation-delay: -7s;
}

@keyframes floatGlow {
  0% { transform: translate(0, 0) scale(1); opacity: 0.4; }
  50% { transform: translate(25px, -20px) scale(1.15); opacity: 0.7; }
  100% { transform: translate(-20px, 20px) scale(0.95); opacity: 0.4; }
}

/* Infinite Skills Marquee / Ticker Ribbon */
.skills-marquee {
  width: 100%;
  overflow: hidden;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 0.95rem 0;
  position: relative;
  white-space: nowrap;
  user-select: none;
}

.marquee-track {
  display: inline-flex;
  gap: 2.5rem;
  animation: marqueeScroll 30s linear infinite;
  will-change: transform;
}

.skills-marquee:hover .marquee-track {
  animation-play-state: paused;
}

.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.marquee-item .dot {
  color: var(--accent);
  font-size: 1.1rem;
}

@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Scroll Reveal Animations with Staggering (Bi-directional) */
.reveal-fade-up {
  opacity: 0;
  transform: translateY(32px) scale(0.97);
  transition: opacity 0.45s ease-out, transform 0.45s ease-out;
  will-change: opacity, transform;
}

.reveal-fade-in {
  opacity: 0;
  transition: opacity 0.45s ease-out;
  will-change: opacity;
}

.reveal-fade-up.revealed {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: calc(var(--stagger-index, 0) * 75ms);
  will-change: auto;
}

.reveal-fade-in.revealed {
  opacity: 1;
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: calc(var(--stagger-index, 0) * 75ms);
  will-change: auto;
}

/* Code Terminal Glass Card Mockup */
.code-terminal-card {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 25px rgba(0, 242, 254, 0.1);
  overflow: hidden;
  margin-top: 2rem;
  text-align: left;
}

.terminal-header {
  background: rgba(30, 41, 59, 0.7);
  border-bottom: 1px solid var(--border-color);
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

.terminal-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.terminal-title {
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.terminal-body {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-mono, monospace);
  font-size: 0.875rem;
  line-height: 1.6;
  overflow-x: auto;
  color: #e2e8f0;
}

.t-keyword { color: #f43f5e; font-weight: 600; }
.t-class { color: #38bdf8; font-weight: 600; }
.t-interface { color: #a78bfa; }
.t-type { color: #2dd4bf; }
.t-var { color: #fbbf24; }
.t-string { color: #34d399; }
.t-func { color: #60a5fa; }

/* Metrics Grid in About Section */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.metric-card {
  text-align: center;
  padding: 1rem 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.metric-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.metric-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

/* Link Arrow Micro-Interactions */
.link-arrow {
  display: inline-block;
  transition: transform 0.25s ease;
}

.project-link:hover .link-arrow,
.btn:hover .link-arrow {
  transform: translate(3px, -3px);
}

/* Mobile Responsive Adjustments for Metrics & CTAs */
@media (max-width: 640px) {
  .metrics-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
}

/* Floating Action Button for High-Conversion WhatsApp CTA */
.floating-whatsapp {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background-color: #25d366;
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.45);
  z-index: 999;
  text-decoration: none;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.floating-whatsapp::before {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: 50%;
  border: 2px solid rgba(37, 211, 102, 0.65);
  animation: pulseRadar 2.5s cubic-bezier(0.24, 0, 0.38, 1) infinite;
  pointer-events: none;
}

@keyframes pulseRadar {
  0% {
    transform: scale(0.95);
    opacity: 0.9;
  }
  70% {
    transform: scale(1.35);
    opacity: 0;
  }
  100% {
    transform: scale(1.35);
    opacity: 0;
  }
}

.floating-whatsapp:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.65);
}

/* --------------------------------------------------------------------------
   Technical Blog Showcase Section (Home)
   -------------------------------------------------------------------------- */
.blog-preview-section {
  padding: 5rem 0;
  background: var(--bg-primary);
}

.blog-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.blog-preview-cta {
  display: flex;
  justify-content: center;
}

/* Accessibility: Respect Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }
  .reveal-fade-up, .reveal-fade-in {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .marquee-track {
    animation: none !important;
  }
  .ambient-glow {
    animation: none !important;
  }
  .floating-whatsapp:hover {
    transform: none;
  }
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}