/* Landing Page Styles */

html {
  scroll-behavior: smooth;
}

/* Transparent header that fades in on scroll */
body.landing-page header {
  background: transparent !important;
  border-bottom: 1px solid transparent;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  transition: background 0.3s ease, border-bottom-color 0.3s ease, backdrop-filter 0.3s ease;
}

body.landing-page header::before {
  display: none !important;
}

/* Hide mobile menu on landing page */
body.landing-page .hamburger-button,
body.landing-page .mobile-menu,
body.landing-page .mobile-menu-backdrop {
  display: none !important;
}

/* Hide Sign Up button on landing page */
body.landing-page header .header-auth-link.btn-primary {
  display: none !important;
}

body.landing-page header.scrolled {
  background: linear-gradient(
    to bottom,
    rgba(246, 247, 251, 1) 0%,
    rgba(246, 247, 251, 0.95) 20%,
    rgba(246, 247, 251, 0.8) 50%,
    rgba(246, 247, 251, 0.4) 100%
  ) !important;
  border-bottom: 1px solid rgba(226, 232, 240, 0.3);
  backdrop-filter: blur(20px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(20px) saturate(180%) !important;
}

body.landing-page header.scrolled::before {
  display: block !important;
}

@media (prefers-color-scheme: dark) {
  body.landing-page header.scrolled {
    background: linear-gradient(
      to bottom,
      rgba(26, 22, 40, 1) 0%,
      rgba(26, 22, 40, 0.95) 20%,
      rgba(26, 22, 40, 0.8) 50%,
      rgba(26, 22, 40, 0.4) 100%
    ) !important;
    border-bottom: 1px solid rgba(61, 53, 82, 0.3);
    backdrop-filter: blur(20px) saturate(180%) !important;
    -webkit-backdrop-filter: blur(20px) saturate(180%) !important;
  }
}

.landing-page {
  padding: 0;
  max-width: 100%;
  overflow-x: hidden;
  position: relative;
}

/* Fade-in animation for scroll-triggered sections */
.fade-in-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-section.fade-in-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Fade-in animation for child items (cards, steps, etc.) */
.fade-in-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-item.fade-in-visible {
  opacity: 1;
  transform: translateY(0);
}

.landing-page section {
  padding: 80px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .landing-page section {
    padding: 60px 20px;
  }
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px;
  padding-top: 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
  width: 100vw;
  max-width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  left: 0;
  right: 0;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

@media (prefers-color-scheme: dark) {
  .hero::after {
    background: radial-gradient(circle at 50% 50%, rgba(5, 199, 111, 0.1) 0%, transparent 70%);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  margin-top: -6em;
  width: 100%;
  padding: 0 24px;
  box-sizing: border-box;
}

.hero-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  margin: 0 0 32px;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin: 0 0 40px;
  line-height: 1.6;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .hero {
    min-height: 100vh;
    padding: 60px 20px;
    padding-top: 80px;
  }
  
  .hero-title {
    font-size: clamp(1.5rem, 6vw, 1.875rem);
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  
  .hero-cta a {
    width: 100%;
    text-align: center;
  }
}

/* Button Sizes */
.btn-large {
  padding: 14px 32px;
  font-size: 1.1rem;
  font-weight: 600;
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  color: var(--text);
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin: 0;
}

@media (max-width: 768px) {
  .section-header h2 {
    font-size: 2rem;
  }
  
  .section-header p {
    font-size: 1rem;
  }
}

/* Features Section */
.features {
  background: var(--bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.12);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  display: block;
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--text);
}

.feature-card p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .feature-card {
    padding: 24px;
  }
}

/* How It Works Section */
.how-it-works {
  background: var(--surface-muted);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 auto 24px;
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

@media (prefers-color-scheme: dark) {
  .step-number {
    box-shadow: 0 4px 12px rgba(5, 199, 111, 0.3);
  }
}

.step h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--text);
}

.step p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 768px) {
  .steps {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* Use Cases Section */
.use-cases {
  background: var(--bg);
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.use-case-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  transition: transform 0.2s, border-color 0.2s;
}

.use-case-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.use-case-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--text);
}

.use-case-card p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 768px) {
  .use-cases-grid {
    grid-template-columns: 1fr;
  }
}

/* CTA Section */
.cta-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 120px 24px;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.3;
}

@media (prefers-color-scheme: dark) {
  .cta-section {
    background: var(--surface-muted);
  }
  
  .cta-section::before {
    background: linear-gradient(90deg, transparent, rgba(5, 199, 111, 0.5), transparent);
  }
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta-section h2 {
  font-size: 2.75rem;
  font-weight: 700;
  margin: 0 0 24px;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.2;
}

.cta-section p {
  font-size: 1.15rem;
  margin: 0 0 48px;
  color: var(--text-muted);
  line-height: 1.7;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-section .btn-primary {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
  padding: 14px 32px;
  font-size: 1.1rem;
  font-weight: 600;
}

.cta-section .btn-primary:hover {
  background: var(--focus);
  border-color: var(--focus);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(124, 58, 237, 0.3);
}

@media (prefers-color-scheme: dark) {
  .cta-section .btn-primary:hover {
    box-shadow: 0 8px 16px rgba(5, 199, 111, 0.3);
  }
}

.cta-section .btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  padding: 14px 32px;
  font-size: 1.1rem;
  font-weight: 600;
}

.cta-section .btn-secondary:hover {
  background: var(--surface-strong);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.cta-note {
  margin-top: 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .cta-section {
    padding: 80px 20px;
  }
  
  .cta-section h2 {
    font-size: 2rem;
  }
  
  .cta-section p {
    font-size: 1.1rem;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  
  .cta-buttons a {
    width: 100%;
    text-align: center;
  }
}

/* Header Auth Links */
.header-auth-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  text-decoration: none;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 8px;
  transition: background-color 0.2s, color 0.2s;
  border: 1px solid transparent;
}

.header-auth-link:not(.btn-primary) {
  color: var(--text-muted);
}

.header-auth-link:not(.btn-primary):hover {
  color: var(--text);
  background: var(--surface-strong);
}

.header-auth-link.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}

.header-auth-link.btn-primary:hover {
  background: var(--focus);
  border-color: var(--focus);
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .header-auth-link {
    padding: 6px 12px;
    font-size: 0.875rem;
  }
}