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

:root {
  /* Functional Dark Palette */
  --bg-main: #06080f;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(26, 36, 56, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 229, 255, 0.15);

  /* Accent Colors */
  --color-primary: #00e5ff;
  --color-primary-glow: rgba(0, 229, 255, 0.4);
  --color-secondary: #a855f7;
  --color-secondary-glow: rgba(168, 85, 247, 0.4);
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(0, 229, 255, 0.03) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(168, 85, 247, 0.03) 0%, transparent 40%);
  background-attachment: fixed;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: url('assets/logo.png');
  background-repeat: no-repeat;
  background-position: center 22%;
  background-size: min(80vw, 550px);
  opacity: 0.02; /* barely visible watermark logo */
  z-index: -2;
  pointer-events: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-main);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-glow);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header & Navigation */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background-color: rgba(6, 8, 15, 0.8);
  border-bottom: 1px solid var(--border-color);
  padding: 0.6rem 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.logo-img {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: 0 0 25px var(--border-glow);
  transition:
    transform var(--transition-normal),
    border-color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.logo-wrapper:hover .logo-img {
  transform: scale(1.05);
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 0 35px rgba(0, 229, 255, 0.35);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-primary), #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-tag {
  font-size: 0.75rem;
  font-family: var(--font-sans);
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  color: #06080f;
  padding: 0.1rem 0.5rem;
  border-radius: 9999px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  -webkit-text-fill-color: initial;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-primary);
  text-shadow: 0 0 8px var(--color-primary-glow);
}

.btn-github {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.btn-github:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-secondary);
}

/* Hero Section */
.hero {
  padding: 6rem 0 4rem;
  text-align: center;
  position: relative;
}

.hero-gradient-orb {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.05) 0%, rgba(168, 85, 247, 0.05) 30%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2.5rem;
  font-weight: 400;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  font-size: 1rem;
  transition: var(--transition-normal);
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #00b0ff 100%);
  color: #06080f;
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.25);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 229, 255, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Downloads Section */
.downloads {
  padding: 5rem 0;
  border-top: 1px solid var(--border-color);
  background: linear-gradient(180deg, transparent, rgba(0, 229, 255, 0.01), transparent);
}

.downloads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  transition: var(--transition-normal);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.download-card h3 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  margin: 1rem 0 0.25rem;
  font-weight: 800;
  color: var(--text-primary);
}

.release-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
}

.release-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  flex-grow: 1;
  line-height: 1.5;
}

.card-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-stable {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-prerelease {
  background: rgba(168, 85, 247, 0.1);
  color: var(--color-secondary);
  border: 1px solid rgba(168, 85, 247, 0.2);
}

.badge-cargo {
  background: rgba(222, 88, 51, 0.1);
  color: #de5833;
  border: 1px solid rgba(222, 88, 51, 0.2);
}

.badge-binary {
  background: rgba(0, 229, 255, 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(0, 229, 255, 0.2);
}

.cargo-card:hover {
  border-color: rgba(222, 88, 51, 0.3);
  box-shadow: 0 10px 35px rgba(222, 88, 51, 0.05);
  transform: translateY(-5px);
}

.binary-card:hover {
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: 0 10px 35px rgba(0, 229, 255, 0.05);
  transform: translateY(-5px);
}

.binary-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  margin-top: auto;
}

.binary-actions .btn {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
}

.download-card.disabled {
  opacity: 0.4;
  filter: grayscale(0.8);
  pointer-events: none;
  border-color: rgba(255, 255, 255, 0.04);
}

.download-card.disabled .btn {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
  border-color: transparent;
  cursor: not-allowed;
}

#prerelease-card {
  position: relative;
}

.prerelease-sad-llama {
  position: absolute;
  bottom: calc(100% + 15px);
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  pointer-events: none;
  background: #090e16;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  width: 250px;
}

.prerelease-sad-llama img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}

/* Tooltip arrow */
.prerelease-sad-llama::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 8px;
  border-style: solid;
  border-color: #090e16 transparent transparent transparent;
}

/* Border arrow wrapper */
.prerelease-sad-llama::before {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 9px;
  border-style: solid;
  border-color: var(--border-color) transparent transparent transparent;
  z-index: -1;
}

#prerelease-card.disabled:hover .prerelease-sad-llama {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) scale(1);
}

#prerelease-card.disabled .btn {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-muted) !important;
  border-color: rgba(255, 255, 255, 0.04) !important;
  box-shadow: none !important;
  cursor: not-allowed;
  opacity: 0.5;
}

/* Features Grid */
.features {
  padding: 5rem 0;
  border-top: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

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

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.05) 0%, rgba(168, 85, 247, 0.05) 100%);
  opacity: 0;
  transition: var(--transition-normal);
  z-index: -1;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: 0 10px 30px rgba(0, 229, 255, 0.05);
}

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

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  display: inline-block;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Config Showcase */
.config-showcase {
  padding: 5rem 0;
  border-top: 1px solid var(--border-color);
  background: linear-gradient(180deg, transparent, rgba(168, 85, 247, 0.02), transparent);
}

.config-container {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 4rem;
  align-items: center;
}

.config-info h3 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.config-info p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.config-features-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.config-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.config-feature-bullet {
  color: var(--color-primary);
  font-weight: 700;
}

.config-viewer {
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: #090e16;
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.config-tabs {
  display: flex;
  background: #111827;
  border-bottom: 1px solid var(--border-color);
}

.config-tab {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  padding: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
  border-bottom: 2px solid transparent;
}

.config-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.02);
}

.config-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  background: rgba(0, 229, 255, 0.02);
}

.config-content {
  padding: 1.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
  height: 400px;
}

.config-panel {
  display: none;
}

.config-panel.active {
  display: block;
}

.toml-comment {
  color: var(--text-muted);
}
.toml-table {
  color: var(--color-secondary);
  font-weight: 600;
}
.toml-key {
  color: var(--color-primary);
}
.toml-value {
  color: #f59e0b;
}
.toml-number {
  color: #10b981;
}

/* Quick Start Section */
.quickstart {
  padding: 5rem 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.quickstart-steps {
  max-width: 700px;
  margin: 0 auto;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.step {
  display: flex;
  gap: 1.5rem;
}

.step-num {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #06080f;
  font-family: var(--font-heading);
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-content {
  flex-grow: 1;
}

.step-content h4 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.step-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.code-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #090e16;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
}

.code-box code {
  user-select: all;
}

.btn-copy {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.8rem;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.btn-copy:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: var(--color-primary);
}

/* Prerequisites / Color Tip Box */
.prerequisites-note {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(168, 85, 247, 0.05);
  border: 1px solid rgba(168, 85, 247, 0.15);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  margin-top: 2.5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

.note-badge {
  background: rgba(168, 85, 247, 0.15);
  color: var(--color-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.prerequisites-note p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

/* Footer Section */
footer {
  border-top: 1px solid var(--border-color);
  background: #03050a;
  padding: 4rem 0 2rem;
  color: var(--text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-brand h4 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-brand p {
  font-size: 0.9rem;
  max-width: 320px;
  margin-bottom: 1.5rem;
}

.footer-links h5 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  font-size: 1rem;
  font-weight: 700;
}

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

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 2rem;
}

.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(168, 85, 247, 0.1);
  color: var(--color-secondary);
  border: 1px solid rgba(168, 85, 247, 0.2);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Keyframes & Animations */
@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

/* Running Llamas Bottom Decoration */
.running-llamas-container {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100vw;
  height: 300px;
  pointer-events: none;
  z-index: 999;
  overflow: hidden;
}

.running-llama {
  position: absolute;
  bottom: 10px;
  left: -250px; /* Hide offscreen left during animation-delay */
  width: 140px;
  height: 140px;
  background-image: url('assets/logo_transparent.png');
  background-size: contain;
  background-repeat: no-repeat;
  opacity: 0.7;
}

/* Base animation for running across the screen */
@keyframes run-across {
  0% {
    left: -250px;
  }
  100% {
    left: 100vw;
  }
}

/* Bouncing/bobbing animation to simulate galloping */
@keyframes gallop {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  25% {
    transform: translateY(-16px) rotate(-6deg);
  }
  50% {
    transform: translateY(4px) rotate(0deg);
  }
  75% {
    transform: translateY(-12px) rotate(6deg);
  }
}

/* Config Locations Panel */
.config-locations {
  margin-top: 2rem;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.config-locations h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.config-locations ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.config-locations li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
}

.config-locations code {
  font-family: var(--font-mono);
  color: var(--color-primary);
  background: rgba(0, 229, 255, 0.04);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  border: 1px solid rgba(0, 229, 255, 0.08);
  font-size: 0.8rem;
  word-break: break-all;
}

.os-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-width: 65px;
  text-align: center;
}

.os-badge.linux {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.os-badge.mac {
  background: rgba(168, 85, 247, 0.1);
  color: var(--color-secondary);
  border: 1px solid rgba(168, 85, 247, 0.2);
}

.os-badge.win {
  background: rgba(0, 229, 255, 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(0, 229, 255, 0.2);
}

/* Theme Presets Selection Styling */
.theme-presets {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.theme-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
  margin-right: 0.5rem;
}

.theme-preset-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
}

.theme-preset-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.theme-preset-btn.active {
  background: rgba(0, 229, 255, 0.1);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsiveness */
@media (max-width: 900px) {
  .config-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero h1 {
    font-size: 2.75rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* Mobile menu can be simplified for landing page */
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero {
    padding: 4rem 0 3rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }
}