@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* ==========================================
   1. DESIGN SYSTEM & ROOT VARIABLES
   ========================================== */
:root {
  /* Font Families */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Colors (Light Theme) */
  --color-bg-light: #f8fafc;
  --color-canvas-light: #ffffff;
  --color-text-light: #0f172a;
  --color-text-muted-light: #475569;
  --color-border-light: #e2e8f0;
  --color-glass-bg-light: rgba(255, 255, 255, 0.7);
  --color-glass-border-light: rgba(226, 232, 240, 0.8);
  --color-shadow-light: rgba(15, 23, 42, 0.08);

  /* Colors (Dark Theme) */
  --color-bg-dark: #090a0f;
  --color-canvas-dark: #12131a;
  --color-text-dark: #f8fafc;
  --color-text-muted-dark: #94a3b8;
  --color-border-dark: #1e293b;
  --color-glass-bg-dark: rgba(18, 19, 26, 0.6);
  --color-glass-border-dark: rgba(30, 41, 59, 0.5);
  --color-shadow-dark: rgba(0, 0, 0, 0.5);

  /* Core Palette (Dynamic via light-dark()) */
  --color-bg: light-dark(var(--color-bg-light), var(--color-bg-dark));
  --color-canvas: light-dark(var(--color-canvas-light), var(--color-canvas-dark));
  --color-text: light-dark(var(--color-text-light), var(--color-text-dark));
  --color-text-muted: light-dark(var(--color-text-muted-light), var(--color-text-muted-dark));
  --color-border: light-dark(var(--color-border-light), var(--color-border-dark));
  --color-glass-bg: light-dark(var(--color-glass-bg-light), var(--color-glass-bg-dark));
  --color-glass-border: light-dark(var(--color-glass-border-light), var(--color-glass-border-dark));
  --color-shadow: light-dark(var(--color-shadow-light), var(--color-shadow-dark));

  /* Brand Accents (Constant across themes for identity) */
  --color-primary-rgb: 234, 88, 12; /* #ea580c Orange */
  --color-primary: rgb(var(--color-primary-rgb));
  --color-primary-hover: #c2410c;
  --color-secondary: #f59e0b; /* #f59e0b Amber */
  --color-accent: #10b981; /* #10b981 Emerald */
  --color-card-hover-bg: light-dark(rgba(234, 88, 12, 0.03), rgba(234, 88, 12, 0.05));

  /* Layout Constants */
  --nav-height: 80px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* Declare support for both light and dark themes */
  color-scheme: light dark;

  /* Custom Scrollbars */
  --scrollbar-thumb: light-dark(#cbd5e1, #334155);
  --scrollbar-track: light-dark(#f1f5f9, #0f172a);
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  scrollbar-width: thin;
}

/* ==========================================
   2. RESET & BASE STYLES
   ========================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  accent-color: var(--color-primary);
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
}

p {
  color: var(--color-text-muted);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  outline: none;
}

img, svg {
  max-width: 100%;
  display: block;
}

/* Scrollbar legacy fallbacks */
@supports not (scrollbar-color: auto) {
  ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }
  ::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
  }
  ::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
  }
}

/* ==========================================
   3. UTILITY CLASSES & COMPONENTS
   ========================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-title h2 span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-title p {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(var(--color-primary-rgb), 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(var(--color-primary-rgb), 0.4);
}

.btn-secondary {
  background-color: var(--color-canvas);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-border);
  transform: translateY(-2px);
}

.glass-card {
  background-color: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px var(--color-shadow);
  transition: var(--transition-smooth);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  background-color: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  margin-bottom: 16px;
}

/* ==========================================
   4. NAVIGATION BAR
   ========================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  background-color: rgba(var(--color-bg-light), 0.7);
  border-bottom: 1px solid rgba(226, 232, 240, 0.3);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

:root[color-scheme="dark"] .navbar {
  background-color: rgba(9, 10, 15, 0.7);
  border-bottom: 1px solid rgba(30, 41, 59, 0.3);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--color-text);
}

.logo svg {
  width: 32px;
  height: 32px;
  fill: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-toggle {
  padding: 8px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--color-primary);
  background-color: var(--color-border);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.mobile-menu-btn {
  display: none;
  font-size: 1.5rem;
  color: var(--color-text);
}

/* ==========================================
   5. HERO SECTION
   ========================================== */
.hero {
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 100px;
  overflow: hidden;
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  top: -10%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(var(--color-primary-rgb), 0.15) 0%, rgba(var(--color-primary-rgb), 0) 70%);
  z-index: -1;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-content h1 span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: 40px;
  line-height: 1.6;
}

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

.hero-mockup {
  position: relative;
  display: flex;
  justify-content: center;
}

/* Simulated Smartphone Mockup */
.phone-mockup {
  width: 300px;
  height: 600px;
  border: 12px solid #1e293b;
  border-radius: 40px;
  background-color: #000;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background-color: #f8fafc;
  overflow-y: auto;
  scrollbar-width: none; /* Hide scrollbars in phone screen view */
}

.phone-screen::-webkit-scrollbar {
  display: none;
}

.phone-notch {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 24px;
  background-color: #1e293b;
  border-bottom-left-radius: 16px;
  border-bottom-right-radius: 16px;
  z-index: 10;
}

/* ==========================================
   6. FEATURES SECTION
   ========================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.feature-card {
  padding: 40px;
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(var(--color-primary-rgb), 0.3);
  background-color: var(--color-card-hover-bg);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background-color: rgba(var(--color-primary-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

/* ==========================================
   7. HOW IT WORKS
   ========================================== */
.steps-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.step-card {
  text-align: center;
  padding: 32px 20px;
  position: relative;
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px auto;
  box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.3);
}

.step-card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.step-card p {
  font-size: 0.9375rem;
}

/* ==========================================
   8. INTERACTIVE DEMO PREVIEW (TABS)
   ========================================== */
.demo-section .container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.demo-tabs {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.demo-tab-btn {
  display: flex;
  align-items: left;
  flex-direction: column;
  padding: 24px;
  text-align: left;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

.demo-tab-btn h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.demo-tab-btn p {
  font-size: 0.875rem;
}

.demo-tab-btn.active {
  border-color: var(--color-primary);
  background-color: var(--color-card-hover-bg);
  box-shadow: 0 10px 20px var(--color-shadow);
}

.demo-tab-btn.active h3 {
  color: var(--color-primary);
}

.demo-preview-display {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* Add some glow behind the interactive phone mockup */
.demo-preview-display::before {
  content: '';
  position: absolute;
  width: 250px;
  height: 450px;
  background: radial-gradient(circle, rgba(var(--color-primary-rgb), 0.2) 0%, rgba(var(--color-primary-rgb), 0) 70%);
  filter: blur(40px);
  z-index: -1;
}

/* ==========================================
   9. PRICING SECTION
   ========================================== */
.pricing-toggle-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}

.pricing-toggle-label {
  font-weight: 600;
  font-size: 1.125rem;
}

.pricing-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.pricing-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.pricing-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-border);
  transition: .4s;
  border-radius: 34px;
}

.pricing-slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: #fff;
  transition: .4s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

input:checked + .pricing-slider {
  background-color: var(--color-primary);
}

input:checked + .pricing-slider:before {
  transform: translateX(26px);
}

.pricing-discount {
  background-color: var(--color-accent);
  color: #fff;
  padding: 4px 10px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
}

.pricing-card.popular {
  border-color: var(--color-primary);
  box-shadow: 0 15px 35px rgba(var(--color-primary-rgb), 0.15);
}

.popular-badge {
  position: absolute;
  top: 24px;
  right: -32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 6px 36px;
  transform: rotate(45deg);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.pricing-header h3 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.pricing-header p {
  font-size: 0.875rem;
  margin-bottom: 24px;
}

.pricing-price {
  margin-bottom: 32px;
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1;
}

.price-period {
  font-size: 1rem;
  color: var(--color-text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9375rem;
}

.pricing-features svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
}

/* ==========================================
   10. FAQs SECTION
   ========================================== */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Modern Mutually Exclusive Details elements */
details.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-canvas);
  transition: var(--transition-smooth);
}

details.faq-item[open] {
  border-color: var(--color-primary);
  background-color: var(--color-glass-bg);
}

summary.faq-question {
  padding: 24px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

summary.faq-question::-webkit-details-marker {
  display: none;
}

summary.faq-question::after {
  content: '+';
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-text-muted);
  transition: var(--transition-smooth);
}

details.faq-item[open] summary.faq-question::after {
  content: '−';
  color: var(--color-primary);
}

.faq-answer {
  padding: 0 24px 24px 24px;
  font-size: 0.9375rem;
  line-height: 1.6;
  border-top: 1px solid transparent;
}

details.faq-item[open] .faq-answer {
  border-top: 1px solid var(--color-border);
}

/* ==========================================
   11. CONTACT FORM
   ========================================== */
.contact-section .container {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 60px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-info h3 {
  font-size: 1.75rem;
  font-weight: 700;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: rgba(var(--color-primary-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-info-icon svg {
  width: 20px;
  height: 20px;
}

.contact-info-details h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.contact-info-details p,
.contact-info-details a {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.contact-info-details a:hover {
  color: var(--color-primary);
}

.contact-form-container {
  padding: 48px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.9375rem;
  transition: var(--transition-smooth);
}

.form-control:focus {
  border-color: var(--color-primary);
  background-color: var(--color-canvas);
  outline: none;
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

/* ==========================================
   12. FOOTER
   ========================================== */
.footer {
  background-color: var(--color-canvas);
  border-top: 1px solid var(--color-border);
  padding: 60px 0 30px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 24px;
}

.footer-col p {
  font-size: 0.9375rem;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

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

.social-links {
  display: flex;
  gap: 12px;
}

.social-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: var(--transition-smooth);
}

.social-btn:hover {
  color: var(--color-primary);
  background-color: var(--color-border);
  transform: translateY(-2px);
}

.social-btn svg {
  width: 18px;
  height: 18px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 0.875rem;
}

/* ==========================================
   13. RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================== */
@media (max-width: 992px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }

  .hero-actions {
    justify-content: center;
  }

  .demo-section .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .demo-preview-display {
    order: -1;
  }

  .contact-section .container {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }

  .steps-container {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .nav-links {
    display: none; /* In a production app, we would add a hamburger menu */
  }

  .mobile-menu-btn {
    display: block;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-group.full-width {
    grid-column: span 1;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}