/* ========================================
   CSS Variables - Matching App Design System
   ======================================== */
:root {
  /* Colors */
  --background: hsl(0 0% 97.6%);
  --foreground: hsl(0 0% 10%);
  --primary: hsl(0 0% 9%);
  --primary-foreground: hsl(0 0% 98%);
  --secondary: hsl(0 0% 96.1%);
  --muted: hsl(0 0% 93%);
  --muted-foreground: hsl(0 0% 40%);
  --accent: hsl(0 0% 90%);
  --border: hsl(0 0% 89.8%);
  --success: #10B981;
  --error: #EF4444;

  /* Spacing */
  --radius: 0.5rem;
  --container-max: 1200px;
  --container-narrow: 800px;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ========================================
   Layout Utilities
   ======================================== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: hsla(0, 0%, 97.6%, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 2rem;
  height: 2rem;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--foreground);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1.5rem;
  height: 2.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
  border-color: var(--primary);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-outline {
  background-color: transparent;
  color: var(--foreground);
  border-color: var(--border);
}

.btn-outline:hover {
  background-color: var(--accent);
}

.btn-large {
  height: 3.5rem;
  font-size: 1rem;
  padding: 0 2rem;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  padding: 5rem 0 2rem 0; /* Reduced bottom padding */
  text-align: center;
}

.hero-content {
  max-width: 56rem;
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  background-color: var(--muted);
  border-radius: 9999px;
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

.badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--success);
  border-radius: 50%;
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.badge-text {
  color: var(--muted-foreground);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--muted-foreground);
  max-width: 60rem;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.hero-providers {
  padding-top: 2rem;
  text-align: center;
}

.providers-label {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: 0.75rem;
}

/* Corporate Partner Logos */
.provider-partners {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.partner-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.partner-circle {
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, hsl(0 0% 98%), hsl(0 0% 94%));
  border: 2px solid hsl(0 0% 90%);
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.08),
    0 2px 4px -2px rgba(0, 0, 0, 0.05),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.8),
    inset 0 -1px 0 0 rgba(0, 0, 0, 0.05);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.partner-circle::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.4) 0%, transparent 100%);
  border-radius: 50%;
}

.partner-circle:hover {
  transform: translateY(-4px);
  box-shadow:
    0 12px 24px -4px rgba(0, 0, 0, 0.12),
    0 8px 16px -8px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 0 0 rgba(0, 0, 0, 0.05);
  border-color: hsl(0 0% 85%);
}

.partner-circle svg {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

.partner-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
  transition: color 0.2s;
}

.partner-logo:hover .partner-name {
  color: var(--foreground);
}

/* Individual provider colors */
.partner-openrouter svg {
  color: #404040;
}

.partner-openai svg {
  color: #000000;
}

.partner-claude svg {
  color: #D97757;
}

/* ========================================
   App Preview Section
   ======================================== */
.preview {
  padding: 2rem 0 4rem 0; /* Balanced padding around screenshot */
}

.screenshot-wrapper {
  max-width: 1000px;
  margin: 0 auto;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow:
    0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 8px 10px -6px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border);
  background-color: white;
}

.app-screenshot {
  width: 100%;
  display: block;
}

/* ========================================
   Features Section
   ======================================== */

.features-header {
  text-align: center;
  max-width: 48rem;
  margin: 0 auto 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-description {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  max-width: 42rem;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 56rem;
  margin: 0 auto;
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}


.feature-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius);
  background-color: hsl(0 0% 95%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon svg {
  color: var(--primary);
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.feature-description {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  line-height: 1.6;
}

/* ========================================
   Download Section
   ======================================== */
.download {
  padding: 5rem 0;
  text-align: center;
}

.download-content {
  max-width: 42rem;
  margin: 0 auto;
}

.download-card {
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem;
  background-color: hsl(0 0% 98%);
  margin: 2rem 0;
}

.download-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2rem;
}

.spinner {
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid var(--muted);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.download-loading p {
  color: var(--muted-foreground);
}

.download-ready {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  background-color: hsl(0 0% 95%);
  border-radius: 9999px;
  font-size: 0.875rem;
}

#version-text {
  font-weight: 600;
  color: var(--primary);
}

#release-date {
  color: var(--muted-foreground);
}

#release-date::before {
  content: "• ";
}

.download-stats {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.system-requirements {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  margin-top: 1.5rem;
  text-align: left;
}

.requirements-title {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: 0.5rem;
}

.requirements-list {
  list-style: none;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.requirements-list li {
  padding: 0.25rem 0;
}

.requirements-list li::before {
  content: "• ";
  margin-right: 0.5rem;
}

.download-error {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 2rem;
}

.download-error p {
  color: var(--muted-foreground);
}

.all-releases-link {
  padding-top: 1rem;
}

.all-releases-link a {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.2s;
}

.all-releases-link a:hover {
  color: var(--foreground);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 5rem;
}

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

.footer-copyright {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  transition: color 0.2s;
}

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-tagline {
    font-size: 1.125rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .app-layout {
    flex-direction: column;
    height: auto;
  }

  .sidebar {
    width: 100%;
    max-height: 300px;
  }

  .chat-window {
    min-height: 400px;
  }

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

  .provider-partners {
    gap: 1.5rem;
  }

  .partner-circle {
    width: 4rem;
    height: 4rem;
  }

  .partner-circle svg {
    width: 28px;
    height: 28px;
  }

  .partner-name {
    font-size: 0.8125rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }
}