/* --- Design System & Custom Properties --- */
:root {
  /* Fonts */
  --font-serif: 'Lora', Georgia, serif;
  --font-header: 'Playfair Display', Georgia, serif;
  --font-brand: 'Cinzel', serif;
  --font-sans: 'Outfit', system-ui, -apple-system, sans-serif;

  /* Theme: Light (Candlelight Parchment) */
  --bg-base: #faf5ee;
  --bg-card: #fdfbf7;
  --bg-input: #fffefb;
  --bg-navbar: rgba(250, 245, 238, 0.85);
  --color-primary: #2b1810;     /* Deep antique ink */
  --color-secondary: #4a3328;   /* Muted chocolate */
  --color-text: #3c2a21;        /* Soft readable brown-black */
  --color-text-light: #7c685c;  /* Muted details */
  --color-accent: #b8860b;      /* Antique gold */
  --color-accent-hover: #966b04;
  --color-accent-light: #f5ecd5;
  --color-border: rgba(43, 24, 16, 0.12);
  --glass-bg: rgba(253, 251, 247, 0.7);
  --glass-border: rgba(43, 24, 16, 0.08);
  --shadow-sm: 0 4px 12px rgba(43, 24, 16, 0.04);
  --shadow-md: 0 8px 24px rgba(43, 24, 16, 0.08);
  --shadow-lg: 0 16px 40px rgba(43, 24, 16, 0.12);

  --transition-smooth: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

[data-theme="dark"] {
  /* Theme: Dark (Midnight Ink) */
  --bg-base: #150f0b;
  --bg-card: #221812;
  --bg-input: #1c130e;
  --bg-navbar: rgba(21, 15, 11, 0.85);
  --color-primary: #f5ecd5;
  --color-secondary: #ebdccb;
  --color-text: #e0d2c5;
  --color-text-light: #af9c8d;
  --color-accent: #dfa83d;      /* Illuminated gold */
  --color-accent-hover: #f5c465;
  --color-accent-light: #3d291b;
  --color-border: rgba(245, 236, 213, 0.12);
  --glass-bg: rgba(34, 24, 18, 0.7);
  --glass-border: rgba(245, 236, 213, 0.08);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--color-text);
  line-height: 1.6;
  transition: var(--transition-smooth);
}

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

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

ul {
  list-style: none;
}

/* --- Layout Utilities --- */
.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}

.badge-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  margin-bottom: 16px;
  transition: var(--transition-smooth);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(184, 134, 11, 0.2);
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-primary);
}
.btn-secondary:hover {
  background-color: rgba(43, 24, 16, 0.04);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 15px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 12px;
}

.btn-icon {
  width: 16px;
  height: 16px;
}

/* --- Navigation Bar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-navbar);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  z-index: 1000;
  transition: var(--transition-smooth);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-brand);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo-icon {
  width: 28px;
  height: 28px;
  stroke: var(--color-accent);
}

.nav-menu {
  display: flex;
  gap: 32px;
}
.nav-menu a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-light);
  transition: var(--transition-smooth);
}
.nav-menu a:hover {
  color: var(--color-primary);
}

/* --- Hero Section --- */
.hero-section {
  padding-top: 140px;
  padding-bottom: 80px;
  overflow: hidden;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-text-area {
  max-width: 580px;
}

.hero-title {
  font-family: var(--font-header);
  font-size: 54px;
  line-height: 1.15;
  color: var(--color-primary);
  margin-bottom: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.65;
  color: var(--color-text);
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-meta {
  font-size: 12px;
  color: var(--color-text-light);
}

/* --- App Mockup Windows --- */
.app-mockup {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 400px;
  transition: var(--transition-smooth);
}

.mockup-header {
  background-color: var(--bg-navbar);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  position: relative;
}

.mockup-controls {
  display: flex;
  gap: 6px;
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-border);
}
.dot-red { background-color: #ff5f56; }
.dot-yellow { background-color: #ffbd2e; }
.dot-green { background-color: #27c93f; }

.mockup-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-light);
}

.mockup-body {
  display: flex;
  flex-grow: 1;
  overflow: hidden;
}

.mockup-sidebar {
  width: 140px;
  background-color: rgba(43, 24, 16, 0.02);
  border-right: 1px solid var(--color-border);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mockup-logo {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 12px;
}

.mockup-nav-item {
  font-size: 11px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 4px;
  color: var(--color-text-light);
}
.mockup-nav-item.active {
  background-color: var(--color-accent-light);
  color: var(--color-accent);
}

.mockup-main {
  flex-grow: 1;
  padding: 24px;
  overflow-y: auto;
  background-color: var(--bg-input);
}

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

.mockup-card {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 14px;
}
.mockup-card .tag {
  font-size: 8px;
  font-weight: 800;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.mockup-card h3 {
  font-family: var(--font-header);
  font-size: 14px;
  margin-bottom: 4px;
}
.mockup-card p {
  font-size: 11px;
  color: var(--color-text-light);
  line-height: 1.4;
}

/* --- Customizer Section --- */
.customizer-section {
  background-color: rgba(43, 24, 16, 0.02);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.customizer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.customizer-text h2 {
  font-family: var(--font-header);
  font-size: 38px;
  color: var(--color-primary);
  margin-bottom: 16px;
  line-height: 1.25;
}

.customizer-text p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.theme-toggles {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.theme-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background-color: var(--bg-card);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-align: left;
}
.theme-btn:hover {
  border-color: var(--color-accent);
  background-color: var(--bg-input);
}
.theme-btn.active {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
  background-color: var(--bg-input);
}

.theme-indicator {
  font-size: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-accent-light);
}

.theme-btn strong {
  display: block;
  font-size: 14px;
  color: var(--color-primary);
}
.theme-btn span {
  font-size: 11px;
  color: var(--color-text-light);
}

.desk-graphic-container {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  height: 380px;
}

.desk-graphic-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.desk-overlay-card {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  padding: 20px;
  border-radius: 8px;
}

.glass-panel {
  background-color: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
}

.preview-card-header {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.preview-mode-tag {
  background-color: var(--color-accent-light);
  padding: 2px 6px;
  border-radius: 4px;
}

.preview-text {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
}

/* --- Features Section --- */
.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px auto;
}
.section-header h2 {
  font-family: var(--font-header);
  font-size: 38px;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.section-header p {
  font-size: 15px;
  color: var(--color-text-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 32px;
  transition: var(--transition-smooth);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background-color: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--color-accent);
  transition: var(--transition-smooth);
}
.feature-icon {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-family: var(--font-header);
  font-size: 20px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --- Timeline Visualizer Demo --- */
.timeline-demo-section {
  background-color: rgba(43, 24, 16, 0.01);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.timeline-visualizer-demo {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: 32px;
  display: flex;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
  overflow-x: auto;
}

.timeline-axis {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 100px;
  border-right: 2px solid var(--color-border);
  padding-right: 16px;
  position: relative;
}

.axis-point {
  font-family: var(--font-brand);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent);
  text-align: right;
  padding: 8px 0;
  position: relative;
}
.axis-point::after {
  content: '';
  position: absolute;
  right: -23px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-border);
  border: 2px solid var(--bg-card);
}

.timeline-lanes {
  display: flex;
  gap: 24px;
  flex-grow: 1;
}

.timeline-lane {
  flex-grow: 1;
  min-width: 320px;
  background-color: rgba(43, 24, 16, 0.02);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.lane-title {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-text-light);
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

.timeline-card {
  background-color: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 16px;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.timeline-card:hover, .timeline-card.active {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
  transform: scale(1.02);
}
.timeline-card.active {
  background-color: var(--color-accent-light);
}

.timeline-card .date {
  font-size: 9px;
  font-weight: 800;
  color: var(--color-accent);
  text-transform: uppercase;
}

.timeline-card h4 {
  font-family: var(--font-header);
  font-size: 14px;
  margin: 4px 0 6px 0;
}

.timeline-card p {
  font-size: 11px;
  color: var(--color-text-light);
  line-height: 1.4;
}

/* --- AI Prompt Context Compiler Demo --- */
.ai-prompts-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 60px;
  align-items: center;
}

.ai-text h2 {
  font-family: var(--font-header);
  font-size: 38px;
  color: var(--color-primary);
  margin-bottom: 16px;
}
.ai-text p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.prompts-mockup {
  height: 340px;
  border-radius: 10px;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.prompt-builder-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 12px;
  margin-bottom: 16px;
}
.prompt-builder-header span {
  font-size: 13px;
  font-weight: 700;
}

.prompt-items-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.prompt-item-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  cursor: pointer;
}
.prompt-item-checkbox input {
  accent-color: var(--color-accent);
}

.compiled-output-area {
  flex-grow: 1;
  display: flex;
}
.compiled-output-area textarea {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background-color: var(--bg-input);
  padding: 10px;
  font-family: monospace;
  font-size: 11px;
  color: var(--color-text);
  resize: none;
  outline: none;
}

/* --- Final Call To Action --- */
.cta-section {
  text-align: center;
}

.cta-card {
  background-color: var(--color-primary);
  color: var(--bg-base);
  border-radius: 16px;
  padding: 80px 40px;
  box-shadow: var(--shadow-lg);
  transition: var(--transition-smooth);
}

.cta-card h2 {
  font-family: var(--font-header);
  font-size: 48px;
  margin-bottom: 16px;
}

.cta-card p {
  font-size: 18px;
  color: var(--color-accent-light);
  margin-bottom: 32px;
  opacity: 0.9;
}

.pricing-badge {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 40px;
  text-transform: uppercase;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
}

.cta-meta {
  font-size: 11px;
  opacity: 0.6;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  background-color: var(--bg-card);
  transition: var(--transition-smooth);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-brand);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
}

.footer-copy {
  font-size: 12px;
  color: var(--color-text-light);
}

/* --- Responsive Layouts --- */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 32px;
  }
  .hero-text-area {
    margin: 0 auto;
  }
  .hero-actions {
    justify-content: center;
  }
  
  .customizer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .ai-prompts-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none; /* Mobile simplicity */
  }
  
  .hero-title {
    font-size: 38px;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }
  .cta-buttons .btn {
    width: 100%;
    max-width: 320px;
    justify-content: center;
  }
  
  .footer-container {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}