:root {
  --brand: #512bd4;
  --brand-dark: #3d1f9e;
  --bg: #f7f6fb;
  --surface: #ffffff;
  --text: #1a1a2e;
  --muted: #5c5c72;
  --border: #e4e2ef;
  --radius: 12px;
  --shadow: 0 8px 28px rgba(81, 43, 212, 0.08);
  --max: 920px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

a {
  color: var(--brand);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--brand-dark);
}

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

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), #7c5cff);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

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

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: var(--bg);
}

.lang-switch button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.lang-switch button.active {
  background: var(--brand);
  color: #fff;
}

.hero {
  padding: 3rem 0 2rem;
}

.hero-card,
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.hero h1,
.page-title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1.2;
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.25rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .grid.two {
    grid-template-columns: repeat(2, 1fr);
  }
}

.app-card {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.app-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--brand), #7c5cff);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  flex-shrink: 0;
}

.app-card h2,
.app-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
}

.app-card p {
  margin: 0 0 0.75rem;
  color: var(--muted);
}

.app-detail {
  margin-top: 0.5rem;
}

.app-detail-header {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.app-name {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
}

.app-tagline {
  margin: 0;
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--brand);
}

.app-actions {
  margin: 2rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.app-detail .prose h3:first-child {
  margin-top: 0;
}

.plan-grid {
  display: grid;
  gap: 1rem;
  margin: 1rem 0;
}

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

.plan-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
}

.plan-card h4 {
  margin: 0 0 0.65rem;
  color: var(--brand);
}

.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff !important;
  text-decoration: none;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn:hover {
  background: var(--brand-dark);
  color: #fff !important;
}

.btn-outline {
  background: transparent;
  color: var(--brand) !important;
  border: 1px solid var(--brand);
}

.btn-outline:hover {
  background: rgba(81, 43, 212, 0.08);
}

.page {
  padding: 2rem 0 3rem;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
}

.prose h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.05rem;
}

.prose p,
.prose li {
  color: var(--text);
}

.prose ul {
  padding-left: 1.2rem;
}

.prose ol.steps-list {
  padding-left: 1.2rem;
}

.prose li + li {
  margin-top: 0.35rem;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.contact-list li:last-child {
  border-bottom: 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

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

.email-preview {
  margin: 0;
  padding: 1rem 1.1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.prose h3 {
  margin: 1.5rem 0 0.75rem;
  font-size: 1rem;
}