/* =============================================================================
   Submarine v1.5 Landing Page Styles
   ============================================================================= */

/* -----------------------------------------------------------------------------
   CSS Variables
   ----------------------------------------------------------------------------- */

:root {
  /* Colors */
  --color-bg: #0a0a0b;
  --color-bg-alt: #111113;
  --color-surface: #18181b;
  --color-surface-hover: #1f1f23;
  --color-border: #27272a;
  --color-border-light: #3f3f46;

  --color-text: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;

  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-muted: #1d4ed8;

  --color-accent: #10b981;
  --color-accent-muted: #059669;

  --color-negative: #ef4444;
  --color-positive: #22c55e;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Sizing */
  --container-max: 1200px;
  --container-narrow: 800px;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* -----------------------------------------------------------------------------
   Reset & Base
   ----------------------------------------------------------------------------- */

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

/* -----------------------------------------------------------------------------
   Typography
   ----------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

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

strong {
  color: var(--color-text);
  font-weight: 600;
}

/* -----------------------------------------------------------------------------
   Layout
   ----------------------------------------------------------------------------- */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-4xl) 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

/* -----------------------------------------------------------------------------
   Navigation
   ----------------------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 10, 11, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text);
  font-weight: 600;
  font-size: 1.25rem;
}

.nav-logo:hover {
  color: var(--color-text);
}

.logo-icon {
  color: var(--color-primary);
  font-size: 1.5rem;
}

.logo-text {
  letter-spacing: -0.02em;
}

.version-badge {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  background-color: rgba(16, 185, 129, 0.1);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  background-color: var(--color-surface);
}

.nav-cta {
  background-color: var(--color-primary);
  color: var(--color-text) !important;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-cta:hover {
  background-color: var(--color-primary-hover);
}

/* -----------------------------------------------------------------------------
   Buttons
   ----------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-xl);
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-text);
}

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

.btn-secondary:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-border-light);
  color: var(--color-text);
}

.btn-demo {
  background-color: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-accent);
}

.btn-demo:hover {
  background-color: var(--color-accent-muted);
  border-color: var(--color-accent-muted);
  color: #fff;
}

.nav-demo {
  color: var(--color-accent) !important;
  font-weight: 500;
}

.nav-demo:hover {
  color: var(--color-accent-muted) !important;
}

.btn-large {
  padding: var(--space-md) var(--space-2xl);
  font-size: 1.1rem;
}

/* -----------------------------------------------------------------------------
   Hero Section
   ----------------------------------------------------------------------------- */

.hero {
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-content {
  max-width: var(--container-narrow);
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* -----------------------------------------------------------------------------
   Page Header
   ----------------------------------------------------------------------------- */

.page-header {
  padding: var(--space-3xl) 0;
  background-color: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.page-title {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

.page-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Value Proposition
   ----------------------------------------------------------------------------- */

.value-prop {
  padding: var(--space-3xl) 0;
}

.value-box {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: var(--space-2xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.value-text {
  font-size: 1.25rem;
  color: var(--color-text);
  line-height: 1.8;
}

/* -----------------------------------------------------------------------------
   Section Titles
   ----------------------------------------------------------------------------- */

.section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
}

.section-intro {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
}

/* -----------------------------------------------------------------------------
   Differentiators
   ----------------------------------------------------------------------------- */

.diff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.diff-card {
  padding: var(--space-2xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all 0.2s;
}

.diff-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
}

.diff-icon {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.diff-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

.diff-text {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* -----------------------------------------------------------------------------
   Features Grid
   ----------------------------------------------------------------------------- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  padding: var(--space-xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all 0.2s;
}

.feature-card:hover {
  border-color: var(--color-primary);
}

.feature-phase {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.feature-title {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
}

.feature-text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* -----------------------------------------------------------------------------
   Architecture Diagram
   ----------------------------------------------------------------------------- */

.arch-diagram {
  max-width: var(--container-narrow);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.arch-layer {
  display: flex;
  align-items: stretch;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.arch-label {
  flex-shrink: 0;
  width: 180px;
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-bg-alt);
  border-right: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
}

.arch-items {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.arch-items span {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

/* -----------------------------------------------------------------------------
   Social Proof
   ----------------------------------------------------------------------------- */

.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.testimonial {
  padding: var(--space-xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
}

.testimonial-text {
  font-size: 1.1rem;
  color: var(--color-text);
  font-style: italic;
  margin-bottom: var(--space-md);
  line-height: 1.7;
}

.testimonial-source {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   CTA Section
   ----------------------------------------------------------------------------- */

.cta {
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.cta-content {
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
}

.cta-title {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.cta-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
}

.cta-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.cta-input {
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
  font-family: var(--font-sans);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all 0.2s;
}

.cta-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.cta-input::placeholder {
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Footer
   ----------------------------------------------------------------------------- */

.footer {
  padding: var(--space-3xl) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 600;
}

.footer-text {
  color: var(--color-text-secondary);
}

.footer-version {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Content Blocks (Product Page)
   ----------------------------------------------------------------------------- */

.content-block {
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.content-block p {
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

.content-list {
  list-style: none;
  padding: 0;
  margin-top: var(--space-lg);
}

.content-list li {
  padding: var(--space-sm) 0;
  padding-left: var(--space-xl);
  position: relative;
  color: var(--color-text-secondary);
}

.content-list li::before {
  content: "•";
  position: absolute;
  left: var(--space-sm);
  color: var(--color-primary);
}

.content-list-negative li::before {
  content: "✗";
  color: var(--color-negative);
}

.content-list-positive li::before {
  content: "✓";
  color: var(--color-positive);
}

/* -----------------------------------------------------------------------------
   Two Column Layout
   ----------------------------------------------------------------------------- */

.two-column {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-3xl);
  max-width: var(--container-max);
  margin: 0 auto;
}

.column-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

/* -----------------------------------------------------------------------------
   Audience Grid
   ----------------------------------------------------------------------------- */

.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.audience-card {
  padding: var(--space-xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
}

.audience-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.audience-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Architecture Sections
   ----------------------------------------------------------------------------- */

.arch-section {
  margin-bottom: var(--space-3xl);
}

.arch-section:last-child {
  margin-bottom: 0;
}

.arch-section-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
  padding-left: var(--space-md);
  border-left: 3px solid var(--color-primary);
}

/* -----------------------------------------------------------------------------
   Tables
   ----------------------------------------------------------------------------- */

.table-container {
  overflow-x: auto;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.spec-table th,
.spec-table td {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.spec-table th {
  background-color: var(--color-surface);
  font-weight: 600;
  color: var(--color-text);
}

.spec-table td {
  color: var(--color-text-secondary);
}

.spec-table td:first-child {
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
}

.spec-table tbody tr:hover {
  background-color: var(--color-surface);
}

/* -----------------------------------------------------------------------------
   Foundation Grid
   ----------------------------------------------------------------------------- */

.foundation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.foundation-item {
  padding: var(--space-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.foundation-item h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.foundation-item p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Guarantees Grid
   ----------------------------------------------------------------------------- */

.guarantees-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.guarantee-card {
  padding: var(--space-xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  border-top: 3px solid var(--color-accent);
}

.guarantee-card h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.guarantee-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Pricing Grid
   ----------------------------------------------------------------------------- */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  padding: var(--space-2xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.pricing-card-highlight {
  border-color: var(--color-primary);
  position: relative;
}

.pricing-card-highlight::before {
  content: "Recommended";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: var(--color-text);
  font-size: 0.75rem;
  font-weight: 600;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-tier {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.pricing-desc {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.pricing-action {
  font-weight: 600;
  color: var(--color-primary);
}

/* -----------------------------------------------------------------------------
   Early Access Form
   ----------------------------------------------------------------------------- */

.early-access-section {
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.form-container {
  max-width: 700px;
  margin: 0 auto;
  padding: var(--space-2xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.form-intro {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
}

.signup-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

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

.form-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}

.form-label .required {
  color: var(--color-negative);
}

.form-label .optional {
  color: var(--color-text-muted);
  font-weight: 400;
}

.form-input,
.form-select,
.form-textarea {
  padding: var(--space-md);
  font-size: 1rem;
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: var(--space-2xl);
}

.form-select option {
  background-color: var(--color-surface);
  color: var(--color-text);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-actions {
  display: flex;
  justify-content: center;
  margin-top: var(--space-md);
}

.btn-submit {
  min-width: 200px;
}

/* Form Messages */
.form-message {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-xl);
}

.form-message[hidden] {
  display: none;
}

.form-message-success {
  background-color: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-message-success .form-message-icon {
  color: var(--color-positive);
  font-size: 1.25rem;
}

.form-message-error {
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.form-message-error .form-message-icon {
  color: var(--color-negative);
  font-size: 1.25rem;
}

.form-message-content strong {
  display: block;
  margin-bottom: var(--space-xs);
}

.form-message-content p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.form-microcopy {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  text-align: center;
}

.form-trust {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

/* -----------------------------------------------------------------------------
   Screenshots Section
   ----------------------------------------------------------------------------- */

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.screenshot-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.2s;
}

.screenshot-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.screenshot-placeholder {
  aspect-ratio: 16 / 10;
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.screenshot-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.screenshot-title {
  font-size: 1.1rem;
  margin: var(--space-lg) var(--space-lg) var(--space-sm);
}

.screenshot-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0 var(--space-lg) var(--space-lg);
  line-height: 1.6;
}

/* -----------------------------------------------------------------------------
   How It Works Section
   ----------------------------------------------------------------------------- */

.how-it-works {
  background-color: var(--color-bg);
}

.steps-flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: 1000px;
  margin: 0 auto;
}

.step-card {
  flex: 1;
  text-align: center;
  padding: var(--space-xl);
  position: relative;
}

.step-number {
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  color: var(--color-text);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0 auto var(--space-md);
}

.step-icon {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.step-title {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
}

.step-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.step-connector {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-border) 0%, var(--color-primary) 50%, var(--color-border) 100%);
  margin-top: 80px;
  flex-shrink: 0;
}

/* -----------------------------------------------------------------------------
   Investigation Story Section
   ----------------------------------------------------------------------------- */

.story-article {
  max-width: var(--container-narrow);
  margin: 0 auto;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
}

.story-headline {
  font-size: 1.5rem;
  margin-bottom: var(--space-xl);
  color: var(--color-text);
  text-align: center;
}

.story-content {
  margin-bottom: var(--space-2xl);
}

.story-content p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.story-content p:last-child {
  margin-bottom: 0;
}

.story-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.stat-item {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* -----------------------------------------------------------------------------
   Integrations Section
   ----------------------------------------------------------------------------- */

.integrations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.integration-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
}

.integration-card h4 {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.integration-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.integration-endpoints,
.integration-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.integration-endpoints li {
  padding: var(--space-xs) 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
}

.integration-endpoints code {
  background-color: var(--color-bg);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.integration-list li {
  padding: var(--space-xs) 0;
  padding-left: var(--space-lg);
  position: relative;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.integration-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

.api-note {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* -----------------------------------------------------------------------------
   Responsive
   ----------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .nav-links {
    gap: var(--space-sm);
  }

  .nav-link {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.85rem;
  }

  .nav-cta {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.85rem;
  }

  .arch-layer {
    flex-direction: column;
  }

  .arch-label {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .two-column {
    grid-template-columns: 1fr;
  }

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

  .form-container {
    padding: var(--space-xl);
  }

  .steps-flow {
    flex-direction: column;
    gap: var(--space-md);
  }

  .step-connector {
    width: 2px;
    height: 40px;
    margin: 0 auto;
  }

  .story-stats {
    flex-direction: column;
    gap: var(--space-xl);
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .nav-container {
    flex-direction: column;
    gap: var(--space-md);
  }

  .form-container {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
  }

  .btn-submit {
    width: 100%;
  }

  .story-article {
    padding: var(--space-lg);
  }

  .story-headline {
    font-size: 1.25rem;
  }

  .stat-value {
    font-size: 1.5rem;
  }

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