/* Base Rivet - Mobile-First Landing Pages */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #0f172a;
  --accent: #f59e0b;
  --success: #10b981;
  --danger: #ef4444;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: var(--gray-800);
  background: #fff;
}

/* Header */
.header {
  padding: 1rem;
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--secondary);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo img {
  height: 40px;
  width: auto;
}

.beta-badge {
  background: var(--accent);
  color: #fff;
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Hero Section */
.hero {
  padding: 3rem 1.5rem 2rem;
  text-align: center;
  background: linear-gradient(180deg, var(--gray-50) 0%, #fff 100%);
}

.hero h1 {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--secondary);
  line-height: 1.2;
  margin-bottom: 1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero h2 {
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--gray-600);
  max-width: 500px;
  margin: 0 auto 2rem;
  line-height: 1.5;
}

.hero h2 strong {
  color: var(--primary);
  font-weight: 600;
}

/* CTA Button */
.cta-button {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 1.125rem;
  font-weight: 600;
  padding: 1rem 2rem;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
  border: none;
  cursor: pointer;
}

.cta-button:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.cta-button small {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0.9;
  margin-top: 0.25rem;
}

/* Phone Mockup */
.phone-mockup {
  max-width: 320px;
  margin: 2.5rem auto 0;
  background: var(--gray-900);
  border-radius: 2rem;
  padding: 0.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.phone-screen {
  background: #fff;
  border-radius: 1.5rem;
  overflow: hidden;
  min-height: 400px;
}

.phone-header {
  background: var(--primary);
  color: #fff;
  padding: 1rem;
  font-weight: 600;
  font-size: 0.875rem;
}

.phone-content {
  padding: 1rem;
}

/* Alert Box (for guardrails page) */
.alert-box {
  background: #fef3c7;
  border: 1px solid #f59e0b;
  border-radius: 0.5rem;
  padding: 1rem;
  margin: 1rem 0;
}

.alert-box-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: #92400e;
  margin-bottom: 0.5rem;
}

.alert-box p {
  font-size: 0.875rem;
  color: #78350f;
  margin-bottom: 0.75rem;
}

.alert-actions {
  display: flex;
  gap: 0.5rem;
}

.alert-btn {
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-size: 0.8rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
}

.alert-btn.primary {
  background: var(--primary);
  color: #fff;
}

.alert-btn.secondary {
  background: var(--gray-200);
  color: var(--gray-700);
}

/* Features Section */
.features {
  padding: 3rem 1.5rem;
  background: #fff;
}

.features h3 {
  font-size: 1.25rem;
  color: var(--secondary);
  text-align: center;
  margin-bottom: 2rem;
}

.feature-list {
  max-width: 600px;
  margin: 0 auto;
}

.feature-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--primary);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: #fff;
}

.feature-content h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 0.25rem;
}

.feature-content p {
  font-size: 0.9rem;
  color: var(--gray-600);
}

/* Comparison Section */
.comparison {
  padding: 3rem 1.5rem;
  background: var(--gray-50);
}

.comparison h3 {
  font-size: 1.25rem;
  color: var(--secondary);
  text-align: center;
  margin-bottom: 2rem;
}

.comparison-grid {
  display: grid;
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.comparison-card {
  background: #fff;
  border-radius: 1rem;
  padding: 1.5rem;
  border: 2px solid var(--gray-200);
}

.comparison-card.old {
  opacity: 0.7;
}

.comparison-card.new {
  border-color: var(--primary);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.15);
}

.comparison-card .label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
}

.comparison-card.old .label {
  color: var(--gray-500);
}

.comparison-card.new .label {
  color: var(--primary);
}

.invoice-list {
  font-family: monospace;
  font-size: 0.875rem;
  color: var(--gray-500);
}

.invoice-list li {
  padding: 0.5rem;
  border-bottom: 1px solid var(--gray-100);
  list-style: none;
}

/* Project Timeline */
.project-folder {
  background: var(--gray-50);
  border-radius: 0.5rem;
  padding: 1rem;
}

.project-folder-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 1rem;
}

.timeline-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  font-size: 0.875rem;
  border-left: 2px solid var(--primary);
  padding-left: 1rem;
  margin-left: 0.5rem;
}

.timeline-item .status {
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  font-weight: 500;
}

.timeline-item .status.sent { background: #dbeafe; color: #1d4ed8; }
.timeline-item .status.paid { background: #d1fae5; color: #059669; }
.timeline-item .status.pending { background: #fef3c7; color: #d97706; }

/* Quote Section */
.quote-section {
  padding: 3rem 1.5rem;
  background: var(--secondary);
  color: #fff;
  text-align: center;
}

.quote-section blockquote {
  font-size: 1.25rem;
  font-style: italic;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
  opacity: 0.95;
}

/* Beta Signup Form */
.signup-section {
  padding: 3rem 1.5rem;
  background: var(--gray-50);
  text-align: center;
}

.signup-section h3 {
  font-size: 1.5rem;
  color: var(--secondary);
  margin-bottom: 0.5rem;
}

.signup-section p {
  color: var(--gray-600);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.signup-form {
  max-width: 400px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group input {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--gray-200);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
}

.form-group select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--gray-200);
  border-radius: 0.5rem;
  font-size: 1rem;
  background: #fff;
}

.signup-note {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 1rem;
}

/* Footer */
.footer {
  padding: 2rem 1.5rem;
  background: var(--secondary);
  color: var(--gray-400);
  text-align: center;
  font-size: 0.875rem;
}

.footer a {
  color: var(--gray-300);
  text-decoration: none;
}

/* Error Mockup (for flexibility page) */
.error-box {
  background: #fef2f2;
  border: 1px solid #ef4444;
  border-radius: 0.5rem;
  padding: 1rem;
  margin: 1rem 0;
}

.error-box-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: #b91c1c;
  font-size: 0.875rem;
}

.success-box {
  background: #f0fdf4;
  border: 1px solid #22c55e;
  border-radius: 0.5rem;
  padding: 1rem;
  margin: 1rem 0;
}

.success-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

/* Responsive - Tablet and up */
@media (min-width: 768px) {
  .hero {
    padding: 4rem 2rem 3rem;
  }

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

  .hero h2 {
    font-size: 1.25rem;
  }

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

  .features {
    padding: 4rem 2rem;
  }

  .feature-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .feature-item {
    margin-bottom: 0;
  }
}

@media (min-width: 1024px) {
  .hero h1 {
    font-size: 3rem;
  }

  .phone-mockup {
    max-width: 360px;
  }
}