:root {
  --bg-color: #0b0f19;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-solid: #111827;
  --bg-input: #0e1526;
  --border-color: rgba(255, 255, 255, 0.12);
  --border-focus: rgba(99, 102, 241, 0.6);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.3);
  --accent-color: #10b981;
  --accent-glow: rgba(16, 185, 129, 0.25);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-main);
}

body {
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background-color: var(--bg-color);
}

/* Background Glow Effects */
.background-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  z-index: -1;
  pointer-events: none;
}

.glow-1 {
  top: -150px;
  left: 30%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
}

.glow-2 {
  bottom: -150px;
  right: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  background: rgba(11, 15, 25, 0.92);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-text span {
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

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

.nav-btn-demo {
  padding: 8px 18px;
  background: rgba(99, 102, 241, 0.2);
  border: 1px solid var(--primary-color);
  border-radius: 99px;
  color: #a5b4fc !important;
}

.nav-btn-demo:hover {
  background: var(--primary-color) !important;
  color: #fff !important;
}

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}

/* Badges & Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 99px;
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.35);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #818cf8;
  box-shadow: 0 0 8px #818cf8;
}

.badge-accent {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.35);
}

.tech-stack-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
}

.pill {
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
}

/* Typography & Gradient (with full browser support fallback) */
.gradient-text {
  color: #818cf8; /* Fallback for browsers without text-clip support */
  background: linear-gradient(135deg, #818cf8 0%, #34d399 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Hero Section */
.hero {
  padding: 90px 0 60px;
  text-align: center;
}

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

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  line-height: 1.15;
  color: var(--text-main);
}

.hero-desc {
  max-width: 760px;
  color: var(--text-muted);
  font-size: 1.15rem;
  margin-bottom: 28px;
}

.hero-desc code {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  color: #a5b4fc;
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 99px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--primary-color);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--primary-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

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

/* Section Header */
.section {
  padding: 60px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}

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

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateY(-4px);
}

.card-icon {
  font-size: 2rem;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--text-main);
}

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

/* Architecture Pipeline */
.pipeline-card {
  padding: 40px 24px;
}

.pipeline-steps {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 160px;
  text-align: center;
  background: rgba(255, 255, 255, 0.04);
  padding: 20px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.step-num {
  width: 32px;
  height: 32px;
  background: var(--primary-color);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin: 0 auto 12px;
}

.step h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: var(--text-main);
}

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

.step-arrow {
  color: var(--primary-color);
  font-size: 1.4rem;
  font-weight: bold;
}

/* API Config Card */
.api-config-card {
  padding: 18px 24px;
  margin-bottom: 24px;
  border-color: rgba(99, 102, 241, 0.3);
}

.api-config-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.api-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 500;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.status-dot.demo-mode {
  background-color: #f59e0b;
  box-shadow: 0 0 8px #f59e0b;
}

.status-dot.api-mode {
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.btn-toggle-config {
  background: none;
  border: none;
  color: var(--accent-color);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 8px;
}

.api-input-wrapper {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.api-input-wrapper.hidden {
  display: none;
}

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

.input-group {
  display: flex;
  gap: 10px;
}

.input-group input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.api-help {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Demo Workspace Studio */
.demo-card {
  padding: 24px;
}

.demo-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.mode-selector {
  display: flex;
  background: rgba(0, 0, 0, 0.4);
  padding: 4px;
  border-radius: var(--radius-sm);
  gap: 4px;
}

.mode-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.mode-btn.active {
  background: var(--primary-color);
  color: #ffffff;
}

.language-picker {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.lang-select {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 6px 12px;
  font-size: 0.9rem;
  outline: none;
}

.lang-swap {
  cursor: pointer;
  font-size: 1.2rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  user-select: none;
  transition: var(--transition);
}

.lang-swap:hover {
  background: var(--primary-color);
}

/* Presets Bar */
.presets-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

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

.preset-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: #a5b4fc;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
}

.preset-btn:hover {
  background: rgba(99, 102, 241, 0.25);
  border-color: var(--primary-color);
}

/* Editor Split View */
.editor-split {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;

  margin-bottom: 20px;
}

.editor-pane {
  display: flex;
  flex-direction: column;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--border-color);
}

.pane-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.btn-action-sm {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-action-sm:hover {
  color: var(--text-main);
}

.code-editor {
  flex: 1;
  min-height: 280px;
  padding: 16px;
  background: transparent;
  border: none;
  color: #e5e7eb;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.5;
  resize: vertical;
  outline: none;
}

.editor-actions {
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-translate {
  padding: 14px 20px;
  border-radius: 12px;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner.hidden {
  display: none;
}

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

/* Metrics Bar */
.metrics-bar {
  display: flex;
  justify-content: space-around;
  background: rgba(0, 0, 0, 0.3);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
}

.metric-item {
  display: flex;
  gap: 6px;
}

.metric-label {
  color: var(--text-muted);
}

.metric-value {
  font-weight: 600;
  color: var(--accent-color);
}

/* Footer */
.footer {
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  margin-top: 60px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-sub {
  font-size: 0.8rem;
  margin-top: 4px;
}

/* Responsive */
@media (max-width: 900px) {
  .editor-split {
    grid-template-columns: 1fr;
  }
  .pipeline-steps {
    flex-direction: column;
  }
  .step-arrow {
    transform: rotate(90deg);
  }
  .hero-title {
    font-size: 2.4rem;
  }
}

.hidden {
  display: none !important;
}