/* CSS Reset & Root Variables */
:root {
  --bg-dark: #0b0d14;
  --bg-surface: #141722;
  --bg-glass: rgba(20, 23, 34, 0.75);
  --glass-border: rgba(255, 255, 255, 0.07);
  --glass-border-hover: rgba(255, 255, 255, 0.16);

  --accent-orange: #d8751b;
  --accent-indigo: #6366f1;
  --accent-violet: #8b5cf6;
  --accent-led: #e11d48;
  --accent-led-glow: rgba(225, 29, 72, 0.4);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --font-main:
    system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  --font-code:
    ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas,
    "DejaVu Sans Mono", "Liberation Mono", monospace;

  --max-width: 1200px;
  --radius-lg: 20px;
  --radius-md: 12px;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-main);
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  background-color: var(--bg-dark);
}

/* Typography Utilities */
h1,
h2,
h3,
h4 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Gradient used ONLY for brand logo text */
.gradient-text {
  background: linear-gradient(135deg, #38bdf8, #818cf8 50%, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  z-index: 1000;
  background: rgba(9, 10, 15, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 1.35rem;
  font-weight: 800;
}

.brand-logo {
  width: 42px;
  height: 42px;
  object-fit: cover;
}

.brand-text-disc {
  color: #d8751b;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  list-style: none;
  white-space: nowrap;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-orange);
  color: var(--text-main);
  border-color: var(--glass-border);
  backdrop-filter: blur(10px);
}

.btn-primary:hover {
  border-color: var(--glass-border-hover);
  filter: brightness(1.2);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border-color: var(--glass-border);
  backdrop-filter: blur(10px);
}

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

/* Hero Section */
.hero {
  padding-top: 170px;
  padding-bottom: 100px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: 50px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  color: var(--accent-orange);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4.2rem);
  margin-bottom: 1.25rem;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 2.5rem auto;
  font-weight: 300;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* Hero Showcase Card */
.hero-showcase {
  margin-top: 4rem;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

.showcase-header {
  height: 44px;
  background: rgba(15, 17, 26, 0.8);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  gap: 0.5rem;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red {
  background: #ff5f56;
}
.dot-yellow {
  background: #ffbd2e;
}
.dot-green {
  background: #27c93f;
}

.showcase-body {
  padding: 3rem 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: center;
}

.showcase-info h3 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.showcase-info p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Section Component */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem auto;
}

.section-tag {
  text-transform: uppercase;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  margin-bottom: 1rem;
}

.section-description {
  color: var(--text-muted);
  font-size: 1.1rem;
}

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

.feature-card {
  background: var(--bg-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  backdrop-filter: blur(16px);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-orange);
  opacity: 0;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--glass-border-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  color: var(--accent-orange);
}

.feature-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.98rem;
}

/* Interactive LED Spotlight Section */
.led-section {
  background: var(--bg-glass);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(225, 29, 72, 0.25);
  padding: 4rem 2rem;
  margin: 4rem 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

@media (max-width: 900px) {
  .led-section {
    grid-template-columns: 1fr;
  }
}

.shelf-demo {
  background: #0f111a;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto;
}

.shelf-row {
  display: flex;
  gap: 12px;
  padding: 1rem;
  background: #181b28;
  border-radius: 8px;
  margin-bottom: 1rem;
  width: fit-content;
  max-width: 100%;
  overflow-x: auto;
}

.shelf-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.led-bulb {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #333;
  transition: all 0.3s ease;
}

.led-bulb.active {
  background: var(--accent-led);
  box-shadow:
    0 0 12px var(--accent-led),
    0 0 20px var(--accent-led);
}

.album-spine {
  flex: none;
  width: 20px;
  min-width: 20px;
  height: 145px;
  min-height: 145px;
  background: #2a2e42;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 8px 3px;
  cursor: pointer;
  transition: var(--transition-smooth);
  overflow: hidden;
  user-select: none;
}

.album-spine.highlighted {
  background: var(--accent-led);
}

.spine-artist {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 0 1 auto;
  text-align: center;
}

.spine-title {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 0.6rem;
  font-weight: 400;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 0 1 auto;
  text-align: center;
}

.album-spine:hover .spine-artist,
.album-spine:hover .spine-title,
.album-spine.highlighted .spine-artist,
.album-spine.highlighted .spine-title {
  color: #ffffff;
}

/* Architecture Section */
.arch-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.arch-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.arch-tag {
  font-family: var(--font-code);
  font-size: 0.85rem;
  color: var(--accent-orange);
  margin-bottom: 0.5rem;
  display: block;
}

.arch-card h4 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.arch-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Code Snippets Section */
.code-box {
  background: #0d0e15;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  overflow: hidden;
  font-family: var(--font-code);
}

.code-header {
  background: rgba(255, 255, 255, 0.03);
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.code-content {
  padding: 1.5rem;
  overflow-x: auto;
  font-size: 0.9rem;
  color: #e2e8f0;
  line-height: 1.7;
}

.code-keyword {
  color: #ff79c6;
}
.code-string {
  color: #f1fa8c;
}
.code-comment {
  color: #6272a4;
}
.code-function {
  color: #50fa7b;
}

/* Footer */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 1rem 0 2rem 0;
  margin-top: 6rem;
  background: rgba(5, 6, 10, 0.95);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-bottom {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Utility & Element Classes Extracted from Inline Styles */
.nav-actions {
  display: flex;
  gap: 1rem;
}

.showcase-title {
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-left: 0.5rem;
}

.showcase-info {
  text-align: left;
}

.showcase-tags {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

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

.showcase-img {
  max-width: 220px;
  filter: drop-shadow(0 10px 20px rgba(0, 242, 254, 0.25));
}

.section-tag-led {
  color: var(--accent-led);
}

.led-description {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.led-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  color: var(--text-main);
}

.led-list-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.shelf-header {
  width: 100%;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
}

.shelf-led-active {
  color: var(--accent-led);
}

.shelf-caption {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-align: center;
}

.footer-logo {
  border-radius: 8px;
}

.footer-license {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.link {
  color: var(--accent-orange);
  text-decoration: underline;
}

.copyleft {
  display: inline-block;
  transform: rotate(180deg);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links,
  .brand img {
    display: none;
  }

  .hero {
    padding-top: 110px;
    padding-bottom: 40px;
  }

  .hero-showcase {
    margin-top: 2rem;
  }

  .showcase-body {
    grid-template-columns: 1fr;
    padding: 1.5rem 1rem;
  }

  /* Reduce space between sections */
  .section {
    padding: 40px 0;
  }

  .section-header {
    margin-bottom: 2rem;
  }

  /* Hide feature card icons in reduced mode */
  .feature-icon {
    display: none;
  }

  .feature-card {
    padding: 1.5rem;
  }

  .led-section {
    margin: 2rem 0;
    padding: 2rem 1.25rem;
  }

  .arch-cards {
    margin-top: 1.5rem;
    gap: 1rem;
  }

  .footer {
    margin-top: 3rem;
    padding: 2.5rem 0 1.5rem 0;
  }
}