/* ============================================
   VINAY SAURABH PORTFOLIO - Dark Developer Theme
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --bg-primary: #0a192f;
  --bg-secondary: #112240;
  --bg-tertiary: #1d3461;
  --accent: #64ffda;
  --accent-rgb: 100, 255, 218;
  --text-primary: #ccd6f6;
  --text-heading: #e6f1ff;
  --text-muted: #8892b0;
  --text-accent: #64ffda;
  --border-color: rgba(100, 255, 218, 0.1);
  --card-bg: rgba(17, 34, 64, 0.7);
  --card-border: rgba(100, 255, 218, 0.15);
  --card-hover-border: rgba(100, 255, 218, 0.4);
  --glass-bg: rgba(17, 34, 64, 0.5);
  --glass-blur: 12px;
  --shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
  --shadow-hover: 0 20px 30px -15px rgba(2, 12, 27, 0.7);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
  --nav-height: 70px;
  --max-width: 1100px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background-color: rgba(100, 255, 218, 0.2);
  color: var(--text-heading);
}

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

a:hover { color: var(--accent); opacity: 0.8; }

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

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.35rem); }

p { margin-bottom: 1rem; color: var(--text-primary); }

.font-mono { font-family: var(--font-mono); }

.text-accent { color: var(--accent) !important; }
.text-muted-custom { color: var(--text-muted) !important; }
.text-heading { color: var(--text-heading) !important; }

/* ---------- Numbered Section Heading ---------- */
.section-heading {
  display: flex;
  align-items: center;
  margin-bottom: 2.5rem;
  white-space: nowrap;
}

.section-heading .number {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  margin-right: 0.75rem;
  font-weight: 400;
}

.section-heading h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 0;
  white-space: nowrap;
}

.section-heading::after {
  content: '';
  display: block;
  width: 200px;
  height: 1px;
  margin-left: 1.5rem;
  background-color: var(--border-color);
  flex-shrink: 1;
  min-width: 0;
}

@media (max-width: 768px) {
  .section-heading::after { display: none; }
  .section-heading { white-space: normal; }
  .section-heading h2 { white-space: normal; }
}

/* ---------- Layout ---------- */
.container-custom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 25px;
}

@media (min-width: 768px) {
  .container-custom { padding: 0 50px; }
}

@media (min-width: 1200px) {
  .container-custom { padding: 0 25px; }
}

section {
  padding: 100px 0;
}

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

/* ---------- Navbar ---------- */
.vs-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 25px;
  transition: var(--transition);
  background-color: transparent;
}

.vs-navbar.scrolled {
  background-color: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
}

@media (min-width: 768px) {
  .vs-navbar { padding: 0 50px; }
}

.vs-navbar .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.vs-navbar .nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.vs-navbar .nav-logo:hover { opacity: 0.8; }

.vs-navbar .nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.25rem;
}

.vs-navbar .nav-links li a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: 4px;
  transition: var(--transition);
  position: relative;
}

.vs-navbar .nav-links li a .nav-number {
  color: var(--accent);
  margin-right: 4px;
  font-size: 0.7rem;
}

.vs-navbar .nav-links li a:hover {
  color: var(--accent);
  background-color: rgba(100, 255, 218, 0.05);
}

.vs-navbar .nav-cta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 8px 16px;
  border-radius: 4px;
  transition: var(--transition);
  background: transparent;
  text-decoration: none;
  margin-left: 0.5rem;
}

.vs-navbar .nav-cta:hover {
  background-color: rgba(100, 255, 218, 0.1);
}

/* Mobile Navigation */
.mobile-menu,
.mobile-overlay {
  display: none;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1003;
  padding: 5px;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  width: 28px;
  height: 2px;
  background-color: var(--accent);
  transition: var(--transition);
  border-radius: 1px;
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-hamburger.active span:nth-child(2) { opacity: 0; }

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 1044px) {
  .nav-hamburger { display: flex; }

  .vs-navbar .nav-links,
  .vs-navbar .nav-cta-wrapper {
    display: none;
  }

  .mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: min(75vw, 400px);
    height: 100vh;
    background-color: var(--bg-secondary);
    z-index: 1002;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
    box-shadow: -10px 0 30px -15px rgba(2, 12, 27, 0.7);
  }

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

  .mobile-menu .mobile-nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: center;
  }

  .mobile-menu .mobile-nav-links li { margin-bottom: 1.5rem; }

  .mobile-menu .mobile-nav-links li a {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    padding: 8px 20px;
  }

  .mobile-menu .mobile-nav-links li a .nav-number {
    display: block;
    color: var(--accent);
    font-size: 0.8rem;
    margin-bottom: 4px;
  }

  .mobile-menu .mobile-nav-links li a:hover { color: var(--accent); }

  .mobile-menu .nav-cta {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 12px 40px;
    border-radius: 4px;
    transition: var(--transition);
    background: transparent;
    text-decoration: none;
    margin-top: 1rem;
  }

  .mobile-menu .nav-cta:hover {
    background-color: rgba(100, 255, 218, 0.1);
  }

  .mobile-overlay {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 25, 47, 0.85);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .mobile-overlay.visible {
    opacity: 1;
    visibility: visible;
  }
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0;
  padding-top: var(--nav-height);
}

.hero .hero-greeting {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  color: var(--accent);
  margin-bottom: 1.25rem;
  opacity: 0;
}

.hero .hero-name {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.1;
  margin-bottom: 0.5rem;
  opacity: 0;
}

.hero .hero-tagline {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--text-muted);
  line-height: 1.1;
  margin-bottom: 1.5rem;
  opacity: 0;
}

.hero .hero-description {
  max-width: 540px;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
  opacity: 0;
}

.hero .hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 14px 28px;
  border-radius: 4px;
  transition: var(--transition);
  background: transparent;
  text-decoration: none;
  opacity: 0;
}

.hero .hero-cta:hover {
  background-color: rgba(100, 255, 218, 0.1);
  transform: translateY(-2px);
}

.hero .hero-cta i { font-size: 0.8rem; }

/* ---------- Glassmorphism Card ---------- */
.glass-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}

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

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

/* Feature card (compact) */
.glass-card-sm {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 6px;
  padding: 1.25rem;
  transition: var(--transition);
}

.glass-card-sm:hover {
  border-color: var(--card-hover-border);
  transform: translateY(-3px);
}

/* ---------- Skill Badge ---------- */
.skill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 6px 14px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  transition: var(--transition);
  background: transparent;
}

.skill-badge:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(100, 255, 218, 0.05);
}

.skill-badge i,
.skill-badge .skill-icon {
  font-size: 0.9rem;
  color: var(--accent);
}

/* ---------- Skills Grid ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 1rem;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
  padding: 0.5rem 0;
}

.skill-item::before {
  content: '\25B8';
  color: var(--accent);
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* Skills category card */
.skill-category {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.75rem;
  transition: var(--transition);
}

.skill-category:hover {
  border-color: var(--card-hover-border);
}

.skill-category h4 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-category h4 i {
  font-size: 1rem;
}

.skill-category ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.skill-category ul li {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0.35rem 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: var(--transition);
}

.skill-category ul li::before {
  content: '\25B8';
  color: var(--accent);
  font-size: 0.65rem;
}

.skill-category ul li:hover {
  color: var(--text-primary);
  transform: translateX(4px);
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

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

.timeline-item {
  position: relative;
  padding-bottom: 3rem;
}

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

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background-color: var(--bg-primary);
  transform: translateX(-5px);
  z-index: 1;
}

.timeline-item.active::before {
  background-color: var(--accent);
  box-shadow: 0 0 10px rgba(var(--accent-rgb), 0.5);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.timeline-title {
  font-size: 1.25rem;
  color: var(--text-heading);
  margin-bottom: 0.25rem;
}

.timeline-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.timeline-subtitle a {
  color: var(--accent);
}

.timeline-content {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.timeline-content ul {
  padding-left: 1.25rem;
  margin: 0;
}

.timeline-content ul li {
  margin-bottom: 0.5rem;
  position: relative;
}

.timeline-content ul li::marker {
  color: var(--accent);
}

/* ---------- Project Card ---------- */
.project-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.project-card .project-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.project-card .project-icon {
  color: var(--accent);
  font-size: 2rem;
}

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

.project-card .project-links a {
  color: var(--text-muted);
  font-size: 1.2rem;
  transition: var(--transition);
}

.project-card .project-links a:hover { color: var(--accent); }

.project-card .project-title {
  font-size: 1.25rem;
  color: var(--text-heading);
  margin-bottom: 0.75rem;
}

.project-card .project-title a {
  color: inherit;
  text-decoration: none;
}

.project-card .project-title a:hover { color: var(--accent); }

.project-card .project-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  flex-grow: 1;
  margin-bottom: 1.5rem;
}

.project-card .project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: auto;
}

/* ---------- Article Card ---------- */
.article-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.75rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.article-card:hover {
  border-color: var(--card-hover-border);
  transform: translateY(-3px);
}

.article-card .article-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.article-card .article-title {
  font-size: 1.1rem;
  color: var(--text-heading);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.article-card .article-title a {
  color: inherit;
  text-decoration: none;
}

.article-card .article-title a:hover { color: var(--accent); }

.article-card .article-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  flex-grow: 1;
  margin-bottom: 1rem;
}

.article-card .article-read-more {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.article-card .article-read-more:hover {
  transform: translateX(4px);
}

/* ---------- Certification Card ---------- */
.cert-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.cert-card:hover {
  border-color: var(--card-hover-border);
  transform: translateY(-3px);
}

.cert-card .cert-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--card-border);
}

.cert-card .cert-header h5 {
  font-size: 1rem;
  color: var(--text-heading);
  margin-bottom: 0.25rem;
}

.cert-card .cert-header .cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
}

.cert-card .cert-body {
  padding: 1.25rem 1.5rem;
  flex-grow: 1;
}

.cert-card .cert-body p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.cert-card .cert-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.cert-card .cert-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.cert-card .cert-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: rgba(100, 255, 218, 0.1);
  padding: 2px 10px;
  border-radius: 3px;
}

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

.cert-card .cert-footer a {
  display: block;
}

.badge-status {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 3px 8px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-active {
  color: var(--accent);
  background: rgba(100, 255, 218, 0.1);
}

.badge-expired {
  color: #ffd700;
  background: rgba(255, 215, 0, 0.1);
}

.badge-featured {
  color: var(--accent);
  border: 1px solid var(--accent);
  background: transparent;
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 2rem;
}

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

.stat-number {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.4rem;
}

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

.stat-sublabel {
  font-size: 0.7rem;
  color: var(--text-muted);
  opacity: 0.7;
}

/* ---------- About Section ---------- */
.about-content {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

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

.about-image-wrapper {
  position: relative;
  max-width: 300px;
  margin: 0 auto;
}

.about-image-wrapper::after {
  content: '';
  display: block;
  position: absolute;
  top: 14px;
  left: 14px;
  width: calc(100% - 14px);
  height: calc(100% - 14px);
  border: 2px solid var(--accent);
  border-radius: 8px;
  z-index: -1;
  transition: var(--transition);
}

.about-image-wrapper:hover::after {
  top: 10px;
  left: 10px;
  width: calc(100% - 10px);
  height: calc(100% - 10px);
}

.about-image-wrapper img {
  border-radius: 8px;
  filter: grayscale(30%);
  transition: var(--transition);
  display: block;
  width: 100%;
}

.about-image-wrapper:hover img {
  filter: none;
}

/* ---------- Contact Section / Form ---------- */
.contact-section {
  max-width: 700px;
}

.contact-section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

.contact-section p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.dark-form .form-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.dark-form .form-control {
  background-color: var(--bg-secondary);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  border-radius: 4px;
  padding: 10px 14px;
  font-size: 0.95rem;
  transition: var(--transition);
}

.dark-form .form-control::placeholder {
  color: var(--text-muted);
  opacity: 0.5;
}

.dark-form .form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.1);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  outline: none;
}

.dark-form .form-control.is-invalid,
.dark-form .was-validated .form-control:invalid {
  border-color: #ff6b6b;
}

.dark-form .invalid-feedback {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #ff6b6b;
}

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

/* ---------- Buttons ---------- */
.btn-accent {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  background-color: transparent;
  border: 1px solid var(--accent);
  padding: 12px 24px;
  border-radius: 4px;
  transition: var(--transition);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-accent:hover {
  background-color: rgba(100, 255, 218, 0.1);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-accent-filled {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--bg-primary);
  background-color: var(--accent);
  border: 1px solid var(--accent);
  padding: 12px 24px;
  border-radius: 4px;
  transition: var(--transition);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 600;
}

.btn-accent-filled:hover {
  background-color: rgba(100, 255, 218, 0.85);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

.btn-ghost {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--card-border);
  padding: 8px 16px;
  border-radius: 4px;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
}

.btn-ghost:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- Footer ---------- */
.vs-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 1.5rem;
  margin-top: 0;
}

.vs-footer h5 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.vs-footer .footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.vs-footer .footer-links li { margin-bottom: 0.5rem; }

.vs-footer .footer-links li a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

.vs-footer .footer-links li a:hover {
  color: var(--accent);
  transform: translateX(4px);
  display: inline-block;
}

.vs-footer .footer-social {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.vs-footer .footer-social a {
  color: var(--text-muted);
  font-size: 1.25rem;
  transition: var(--transition);
}

.vs-footer .footer-social a:hover { color: var(--accent); }

.vs-footer .footer-newsletter .form-control {
  background-color: var(--bg-primary);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 0.85rem;
}

.vs-footer .footer-newsletter .form-control::placeholder {
  color: var(--text-muted);
  opacity: 0.5;
}

.vs-footer .footer-newsletter .form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.1);
  outline: none;
}

.vs-footer .footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 1.25rem;
  margin-top: 2rem;
  text-align: center;
}

.vs-footer .footer-bottom p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ---------- FAQ Accordion ---------- */
.faq-item {
  border: 1px solid var(--card-border);
  border-radius: 8px;
  margin-bottom: 1rem;
  overflow: hidden;
  background: var(--card-bg);
  transition: var(--transition);
}

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

.faq-item .accordion-button {
  background: transparent;
  color: var(--text-heading);
  font-size: 1rem;
  font-weight: 500;
  padding: 1.25rem 1.5rem;
  border: none;
  box-shadow: none;
}

.faq-item .accordion-button::after {
  filter: invert(0.7) sepia(1) saturate(3) hue-rotate(120deg);
}

.faq-item .accordion-button:not(.collapsed) {
  color: var(--accent);
  background: transparent;
  box-shadow: none;
}

.faq-item .accordion-button:focus {
  box-shadow: none;
  border-color: transparent;
}

.faq-item .accordion-body {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ---------- Social Card ---------- */
.social-link-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  transition: var(--transition);
  text-decoration: none;
  color: var(--text-primary);
}

.social-link-card:hover {
  border-color: var(--card-hover-border);
  transform: translateX(8px);
  color: var(--text-heading);
}

.social-link-card i {
  font-size: 1.5rem;
  color: var(--accent);
  width: 36px;
  text-align: center;
  flex-shrink: 0;
}

.social-link-card .social-info h5 {
  font-size: 0.95rem;
  margin-bottom: 0;
  color: var(--text-heading);
}

.social-link-card .social-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ---------- Contact Options Grid ---------- */
.contact-option {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  transition: var(--transition);
  text-decoration: none;
  color: var(--text-primary);
}

.contact-option:hover {
  border-color: var(--card-hover-border);
  transform: translateY(-2px);
  color: var(--text-heading);
}

.contact-option i {
  font-size: 1.25rem;
  color: var(--accent);
  width: 32px;
  text-align: center;
  flex-shrink: 0;
}

/* ---------- 404 Page ---------- */
.page-404 {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.page-404 .error-code {
  font-family: var(--font-mono);
  font-size: clamp(5rem, 15vw, 10rem);
  font-weight: 700;
  color: var(--text-heading);
  opacity: 0.15;
  line-height: 1;
  margin-bottom: -1rem;
}

.page-404 h1 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  color: var(--text-heading);
  margin-bottom: 1rem;
}

.page-404 p {
  color: var(--text-muted);
  max-width: 400px;
  margin-bottom: 2rem;
}

/* ---------- Scroll Reveal Animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- Preloader ---------- */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

.preloader-logo {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--accent);
  animation: pulse-glow 1.5s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; text-shadow: 0 0 0 transparent; }
  50% { opacity: 1; text-shadow: 0 0 20px rgba(var(--accent-rgb), 0.3); }
}

/* ---------- Contact Quick Cards (inline on subpages) ---------- */
.contact-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.contact-quick a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--card-border);
  border-radius: 4px;
  transition: var(--transition);
  text-decoration: none;
}

.contact-quick a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- Loading/Success states (contact form) ---------- */
.form-loading, .form-success {
  text-align: center;
  padding: 3rem 2rem;
}

.form-loading .spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--card-border);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1.5rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.form-success i {
  font-size: 3rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

/* ---------- Responsive Utilities ---------- */
.d-none-mobile { display: block; }
@media (max-width: 768px) { .d-none-mobile { display: none; } }

/* Override Bootstrap bg in dark theme */
.bg-dark-custom { background-color: var(--bg-primary) !important; }

/* Make Bootstrap form validation work with dark theme */
.was-validated .form-control:valid { border-color: var(--accent); }
.was-validated .form-control:valid:focus { box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.1); }

/* Subpage hero / page header */
.page-header {
  padding: calc(var(--nav-height) + 40px) 0 40px;
}

.page-header .number {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  display: block;
  margin-bottom: 0.5rem;
}

.page-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: 0.75rem;
}

.page-header p {
  color: var(--text-muted);
  max-width: 600px;
  font-size: 1.05rem;
}