:root {
  --color-primary: #1A237E;
  --color-accent: #3949AB;
  --color-success: #2E7D32;
  --color-warning: #E65100;
  --color-danger: #C62828;
  --color-text: #212121;
  --color-text-secondary: #616161;
  --color-text-muted: #757575;
  --color-border: #E0E0E0;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F5F6FA;
  --radius-button: 8px;
  --radius-card: 12px;
  --radius-panel: 16px;
  --font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-surface);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

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

h1, h2, h3 {
  color: var(--color-primary);
  line-height: 1.25;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

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

nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-weight: 500;
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  background: var(--color-primary);
  color: #FFFFFF;
  text-align: center;
  padding: 64px 24px;
}

.hero h1 {
  color: #FFFFFF;
  font-size: clamp(28px, 4vw, 40px);
  margin: 0 0 16px;
}

.hero p {
  max-width: 640px;
  margin: 0 auto 28px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
}

.btn,
.btn-outline {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius-button);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 15px;
  font-family: inherit;
}

.hero .btn {
  background: #FFFFFF;
  color: var(--color-primary);
}

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

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

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

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

section {
  padding: 56px 0;
}

.page-title {
  text-align: center;
  padding: 48px 24px 24px;
}

.page-title h1 {
  margin: 0 0 12px;
}

.page-title p {
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.feature {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.feature h3 {
  margin-top: 0;
}

.feature p {
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.price-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.price-card.popular {
  border-color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(26, 35, 126, 0.12);
}

.badge {
  align-self: flex-start;
  background: var(--color-primary);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  margin: 0;
}

.badge-promo {
  align-self: flex-start;
  background: var(--color-warning);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  margin: 0;
}

.price-card h3 {
  margin: 0;
}

.price {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.price span {
  font-size: 15px;
  font-weight: 400;
  color: var(--color-text-muted);
}

.price-original {
  font-size: 14px;
  color: var(--color-text-muted);
  text-decoration: line-through;
  margin: -8px 0 0;
}

.price-note {
  font-size: 13px;
  color: var(--color-text-muted);
  margin: -4px 0 0;
}

.price-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  flex-grow: 1;
}

.price-card li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-surface-alt);
}

.price-card li:last-child {
  border-bottom: none;
}

.price-card .btn,
.price-card .btn-outline {
  text-align: center;
  margin-top: 8px;
}

.pricing-footnote {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 13px;
  margin-top: 32px;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.contact-card {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  text-align: center;
}

.contact-card h3 {
  margin-top: 0;
}

.contact-card a {
  text-decoration: none;
  font-weight: 600;
}

.legal h2 {
  font-size: 18px;
  margin-top: 32px;
}

.legal h2:first-child {
  margin-top: 0;
}

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

.downloads-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.download-card {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.download-card h3 {
  margin-top: 0;
}

.verifier-card {
  border-left: 4px solid var(--color-primary);
}

.verifier-hint {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.verifier-status {
  margin-top: 16px;
  font-weight: 700;
  font-size: 16px;
  min-height: 24px;
}

.verifier-status.status-success {
  color: var(--color-success);
}

.verifier-status.status-danger {
  color: var(--color-danger);
}

.verifier-status.status-pending {
  color: var(--color-primary);
}

.verifier-result {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
  padding: 16px;
  margin-top: 12px;
  display: none;
  overflow-wrap: anywhere;
  font-size: 12px;
  color: var(--color-primary);
  font-family: 'Consolas', monospace;
}

.verifier-result.status-success {
  border-color: var(--color-success);
  color: var(--color-success);
}

.verifier-result.status-danger {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

details.manual-check {
  margin-top: 24px;
  padding: 16px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-card);
}

details.manual-check summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary);
}

.manual-check-body {
  margin-top: 16px;
  padding: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
}

.manual-check-body code {
  display: block;
  overflow-wrap: anywhere;
  font-size: 12px;
  color: var(--color-primary);
  background: var(--color-surface-alt);
  padding: 8px;
  border-radius: 4px;
  margin: 8px 0;
}

.manual-check-body p {
  font-size: 12px;
  color: var(--color-text-muted);
}

footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 14px;
}

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

.status-panel {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--color-surface-alt);
}

.status-panel .status-card {
  max-width: 420px;
  width: 100%;
  background: var(--color-surface);
  border-radius: var(--radius-panel);
  border: 1px solid var(--color-border);
  padding: 40px 32px;
  text-align: center;
}

.status-panel .status-card h1 {
  font-size: 64px;
  margin: 0;
  color: var(--color-warning);
}

.status-panel .status-card h2 {
  color: var(--color-text);
  font-weight: 400;
  margin: 8px 0 16px;
}

.status-panel .status-card p {
  color: var(--color-text-secondary);
}

@media (max-width: 640px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding: 48px 20px;
  }
}