:root {
  --bg-primary: #0a0b12;
  --bg-secondary: #121320;
  --bg-card: rgba(22, 24, 40, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(0, 229, 255, 0.3);
  --text-primary: #f0f3fc;
  --text-secondary: #9aa1bc;
  --accent-cyan: #00e5ff;
  --accent-purple: #9c27b0;
  --accent-blue: #0288d1;
  --gradient-main: linear-gradient(135deg, #00e5ff 0%, #a855f7 100%);
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(0, 229, 255, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 30%, rgba(168, 85, 247, 0.08) 0%, transparent 45%);
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(10, 11, 18, 0.85);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.5px;
}

.logo-icon {
  font-size: 1.35rem;
}

.version-tag {
  background: rgba(0, 229, 255, 0.12);
  color: var(--accent-cyan);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid rgba(0, 229, 255, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent-cyan);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-main);
  color: #05060b;
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.25);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 229, 255, 0.4);
}

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

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

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-lg small {
  display: block;
  font-size: 0.72rem;
  opacity: 0.8;
  font-weight: 400;
}

/* Hero */
.hero {
  padding: 80px 0 50px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #00e676;
  box-shadow: 0 0 10px #00e676;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(0, 230, 118, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 230, 118, 0); }
}

.hero-title {
  font-size: 3.4rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

.feature-pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.pill {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.pill code {
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.1);
  padding: 2px 4px;
  border-radius: 4px;
  font-family: var(--font-mono);
}

/* Window Mockup */
.showcase {
  padding: 30px 0 70px;
}

.window-mockup {
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  max-width: 860px;
  margin: 0 auto;
}

.window-header {
  background: rgba(255, 255, 255, 0.03);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

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

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.window-title {
  flex: 1;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.window-body {
  padding: 30px;
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 24px;
  align-items: center;
}

.preview-box {
  background: rgba(10, 11, 18, 0.8);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  position: relative;
}

.preview-badge {
  font-size: 0.72rem;
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(168, 85, 247, 0.3);
  display: inline-block;
  margin-bottom: 18px;
}

.sample-icon-display {
  position: relative;
  width: 72px;
  height: 72px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-avatar {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, #7b1fa2, #00b0ff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  box-shadow: 0 8px 24px rgba(0, 176, 255, 0.3);
  position: relative;
  z-index: 2;
}

.pulse-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 20px;
  border: 2px solid var(--accent-cyan);
  animation: ripple 2s infinite ease-out;
}

@keyframes ripple {
  0% { transform: scale(0.9); opacity: 1; }
  100% { transform: scale(1.3); opacity: 0; }
}

.preview-label {
  font-weight: 700;
  font-size: 0.95rem;
}

.preview-status {
  font-size: 0.75rem;
  color: #00e676;
}

.preview-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  border-radius: 10px;
}

.step-card.active {
  background: rgba(168, 85, 247, 0.08);
  border-color: rgba(168, 85, 247, 0.3);
}

.step-num {
  width: 26px;
  height: 26px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.step-card strong {
  display: block;
  font-size: 0.88rem;
}

.step-card p {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* Sections */
.section {
  padding: 80px 0;
}

.bg-alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 620px;
  margin: 0 auto;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 28px;
  transition: all 0.25s;
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  background: rgba(28, 30, 50, 0.8);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.55;
}

.card-desc code {
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.1);
  padding: 1px 4px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

/* Checker & Terminal */
.checker-container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  align-items: center;
}

.terminal-card {
  background: #0d0f17;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.terminal-bar {
  background: rgba(255, 255, 255, 0.04);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid var(--border-color);
}

.terminal-bar span:not(.term-title) {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.term-title {
  flex: 1;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.terminal-content {
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  overflow-x: auto;
}

.term-dim { color: #555b72; }
.term-cyan { color: #00e5ff; }
.term-green { color: #00e676; }
.term-yellow { color: #ffea00; }

.spec-table-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
}

.spec-table-box h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
}

.spec-table td {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.88rem;
}

.spec-table td:first-child {
  color: var(--text-secondary);
  width: 38%;
}

/* Guide Steps */
.guide-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 30px;
  text-align: center;
}

.guide-icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

.guide-card h4 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.guide-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

/* CTA Section */
.cta-section {
  text-align: center;
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(156, 39, 176, 0.1) 100%);
}

.cta-container {
  max-width: 680px;
}

.cta-section h2 {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 14px;
}

.cta-section p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 30px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}

.cta-meta {
  font-size: 0.8rem;
  color: #6d7593;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 28px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

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

/* Responsive */
@media (max-width: 900px) {
  .cards-grid, .guide-steps {
    grid-template-columns: 1fr;
  }
  .preview-grid, .checker-container {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.5rem;
  }
  .nav-links a:not(.btn) {
    display: none;
  }
}