/* CommercePing — static site styles */
/* Calm, trustworthy commerce SaaS; one accent colour; system font stack; mobile first */

/* CSS Custom Properties */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-surface: #ffffff;
  --color-surface-hover: #f1f3f4;
  --color-border: #e0e0e0;
  --color-border-strong: #d0d0d0;
  --color-text: #1a1a2e;
  --color-text-muted: #5f6368;
  --color-text-light: #80868b;
  --color-accent: #2d6a4f;
  --color-accent-hover: #1b4d3a;
  --color-accent-light: #e8f5e9;
  --color-accent-text: #ffffff;
  --color-disabled-bg: #f5f5f5;
  --color-disabled-text: #9e9e9e;
  --color-disabled-border: #e0e0e0;
  --color-error: #c62828;
  --color-error-bg: #fdeaea;
  --color-focus: #2d6a4f;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --max-width: 720px;
  --header-height: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #121212;
    --color-bg-alt: #1e1e1e;
    --color-surface: #1e1e1e;
    --color-surface-hover: #2a2a2a;
    --color-border: #333333;
    --color-border-strong: #444444;
    --color-text: #e8e8e8;
    --color-text-muted: #a0a0a0;
    --color-text-light: #888888;
    --color-accent: #6fc98f;
    --color-accent-hover: #8fd9a8;
    --color-accent-light: #1b3d2a;
    --color-accent-text: #121212;
    --color-disabled-bg: #2a2a2a;
    --color-disabled-text: #666666;
    --color-disabled-border: #444444;
    --color-error: #ef5350;
    --color-error-bg: #3d1a1a;
    --color-focus: #6fc98f;
    --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);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Focus visible for accessibility */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--color-accent-text);
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: 1000;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-md);
}

/* Layout */
.page-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1;
}

.site-logo:hover {
  color: var(--color-accent);
}

.site-logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

/* Navigation */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

.nav-toggle:hover {
  background: var(--color-surface-hover);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  list-style: none;
}

.nav-link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background 0.15s ease;
}

.nav-link:hover {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.nav-link[aria-current="page"] {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.nav-cta {
  margin-left: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--color-accent-text);
  border-radius: var(--radius-md);
  font-weight: 600;
}

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

.nav-cta:disabled,
.nav-cta[aria-disabled="true"] {
  background: var(--color-disabled-bg);
  color: var(--color-disabled-text);
  border: 1px solid var(--color-disabled-border);
  cursor: not-allowed;
}

/* Main content */
main {
  flex: 1;
  padding: var(--space-2xl) 0;
}

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

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

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-text);
}

h1 {
  font-size: clamp(1.75rem, 4vw + 1rem, 2.5rem);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: clamp(1.375rem, 3vw + 0.75rem, 1.875rem);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-md);
}

h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.6;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
}

.btn-primary:focus-visible {
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-surface-hover);
  border-color: var(--color-border-strong);
}

.btn-secondary:focus-visible {
  box-shadow: 0 0 0 3px var(--color-bg);
}

.btn-disabled {
  background: var(--color-disabled-bg);
  color: var(--color-disabled-text);
  border: 1px solid var(--color-disabled-border);
  cursor: not-allowed;
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
}

.card-price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
  white-space: nowrap;
}

.card-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.card-features {
  list-style: none;
  margin-bottom: var(--space-lg);
}

.card-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  color: var(--color-text);
  font-size: 0.9375rem;
}

.card-features li::before {
  content: "";
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232d6a4f' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}

@media (prefers-color-scheme: dark) {
  .card-features li::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236fc98f' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  }
}

.card-cta {
  width: 100%;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-free {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.badge-popular {
  background: var(--color-accent);
  color: var(--color-accent-text);
}

.badge-coming-soon {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

/* Footer */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0 var(--space-xl);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-column h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.15s ease;
}

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

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
}

.footer-brand {
  font-weight: 600;
  color: var(--color-text);
}

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

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

/* Home page specific */
.hero {
  text-align: center;
  padding: var(--space-xl) 0;
}

.hero h1 {
  margin-bottom: var(--space-md);
}

.hero .lead {
  margin: 0 auto var(--space-xl);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

@media (min-width: 480px) {
  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  color: var(--color-accent);
}

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

.feature-card h3 {
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* Pricing page */
.pricing-table {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .pricing-table {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .pricing-table {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pricing-note {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-top: var(--space-xl);
}

.pricing-details {
  margin-top: var(--space-2xl);
}

.pricing-details h2 {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.detail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .detail-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.detail-card h3 {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.detail-card h3::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
}

.detail-card ul {
  list-style: none;
}

.detail-card li {
  padding: var(--space-xs) 0;
  color: var(--color-text);
  position: relative;
  padding-left: var(--space-lg);
}

.detail-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* Legal pages */
.legal-content {
  max-width: 720px;
  margin: 0 auto;
}

.legal-content h1 {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.legal-content h2 {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.legal-content h2:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.legal-content h3 {
  margin-top: var(--space-lg);
}

.legal-content ul {
  margin-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.legal-content li {
  margin-bottom: var(--space-xs);
}

.legal-content a {
  color: var(--color-accent);
  text-decoration: underline;
}

.legal-content a:hover {
  color: var(--color-accent-hover);
}

.last-updated {
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

/* Support page */
.support-options {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

@media (min-width: 640px) {
  .support-options {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.support-card h3 {
  margin-bottom: var(--space-sm);
}

.support-card p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

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

.contact-info {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.contact-info p {
  margin-bottom: var(--space-xs);
}

/* 404 page */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: var(--space-2xl) var(--space-md);
}

.error-code {
  font-size: clamp(4rem, 15vw, 8rem);
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: var(--space-md);
}

.error-page h1 {
  margin-bottom: var(--space-md);
}

.error-page .lead {
  max-width: 40ch;
  margin-bottom: var(--space-xl);
}

/* Utility classes */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* Responsive nav */
@media (max-width: 899px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-xs);
    box-shadow: var(--shadow-md);
    display: none;
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    text-align: center;
  }

  .nav-cta {
    margin-left: 0;
    width: 100%;
    text-align: center;
  }
}

/* Print styles */
@media print {
  .site-header,
  .site-footer,
  .btn,
  .nav-toggle {
    display: none !important;
  }
  
  main {
    padding: 0;
  }
  
  .container {
    max-width: none;
    padding: 0;
  }
  
  body {
    color: #000;
    background: #fff;
  }
  
  a {
    text-decoration: none;
    color: #000;
  }
}