:root {
  --bg: #f7f8fc;
  --bg-soft: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --primary: #635bff;
  --primary-dark: #4f46e5;
  --primary-soft: rgba(99, 91, 255, 0.12);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --border: #e5e7eb;
  --card-shadow: 0 20px 50px rgba(17, 24, 39, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --container: 1800px;
  --container-min: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(99, 91, 255, 0.16), transparent 34%),
    radial-gradient(circle at top right, rgba(16, 185, 129, 0.12), transparent 28%),
    var(--bg);
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button,
input {
  font: inherit;
}

.container {
  width: min(var(--container), max(var(--container-min), calc(100% - 40px)));
  margin: 0 auto;
}

.btn {
  border: 0;
  outline: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 20px;
  border-radius: 999px;
  font-weight: 800;
  transition: 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  box-shadow: 0 16px 30px rgba(99, 91, 255, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(99, 91, 255, 0.38);
}

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

.btn-secondary:hover {
  border-color: #c7d2fe;
  background: #fafaff;
  transform: translateY(-1px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(247, 248, 252, 0.78);
  border-bottom: 1px solid rgba(229, 231, 235, 0.75);
}

.nav-shell {
  position: relative;
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  letter-spacing: -0.03em;
  font-size: 20px;
  position: relative;
  z-index: 2;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(135deg, #635bff, #8b5cf6 55%, #10b981);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 12px 28px rgba(99, 91, 255, 0.28);
}

.nav-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-weight: 700;
  font-size: 14px;
  justify-content: center;
  flex: 1;
}

.nav-links a {
  position: relative;
  padding: 8px 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), #10b981);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--text);
}

.nav-links a:hover::after,
.nav-links a.is-active::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.auth-link {
  min-height: 48px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.86);
  font-weight: 800;
  color: var(--text);
  display: inline-flex;
  align-items: center;
}

.auth-link:hover {
  border-color: #c7d2fe;
  background: #fafaff;
}

.user-switch {
  position: relative;
}

.user-trigger {
  gap: 8px;
}

.user-trigger svg {
  flex-shrink: 0;
}

.user-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 250px;
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 22px 50px rgba(17, 24, 39, 0.12);
  padding: 10px;
  display: none;
}

.user-switch.open .user-menu {
  display: grid;
}

/* Force click-only behavior: hover alone must not open the user menu. */
.user-switch:hover .user-menu {
  display: none;
}

.user-switch.open:hover .user-menu {
  display: grid;
}

.user-menu a,
.user-menu .user-menu-item {
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
  font-weight: 700;
  font-size: 14px;
}

.user-menu a:hover {
  color: var(--text);
  background: rgba(99, 91, 255, 0.08);
}

.user-menu .user-menu-item {
  cursor: default;
}

.language-switch {
  position: relative;
}

.language-trigger {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.86);
  border-radius: 999px;
  min-height: 48px;
  padding: 10px 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  cursor: pointer;
  font-weight: 800;
}

.language-trigger span {
  color: var(--muted);
  font-size: 13px;
}

.language-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 220px;
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 22px 50px rgba(17, 24, 39, 0.12);
  padding: 10px;
  display: none;
}

.language-switch.open .language-menu {
  display: grid;
}

.language-menu a {
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
  font-weight: 700;
}

.language-menu a:hover,
.language-menu a.is-current {
  color: var(--text);
  background: rgba(99, 91, 255, 0.08);
}

.mobile-menu-btn {
  display: none;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.mobile-menu-btn span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
}

.site-main {
  min-height: calc(100vh - 180px);
}

.site-main > h1,
.site-main > p {
  width: min(920px, calc(100% - 40px));
  margin-left: auto;
  margin-right: auto;
}

.site-main > h1 {
  margin-top: 48px;
  margin-bottom: 16px;
  font-size: clamp(34px, 6vw, 56px);
  letter-spacing: -0.05em;
}

.site-main > p {
  margin-top: 0;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 17px;
}

.site-footer {
  padding: 34px 0 44px;
  color: var(--muted);
  font-size: 14px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 22px;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

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

@media (max-width: 920px) {
  .nav {
    padding: 14px 0;
    align-items: flex-start;
  }

  .mobile-menu-btn {
    display: inline-flex;
    margin-left: auto;
    position: relative;
    z-index: 2;
  }

  .nav-panel {
    position: absolute;
    top: calc(100% + 12px);
    left: 20px;
    right: 20px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(255, 255, 255, 0.97);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 18px;
    box-shadow: 0 22px 50px rgba(17, 24, 39, 0.12);
    display: none;
  }

  .site-header.menu-open .nav-panel {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .nav-links a {
    width: 100%;
    padding: 10px 0;
  }

  .nav-actions {
    justify-content: stretch;
    display: grid;
    gap: 10px;
  }

  .language-switch,
  .user-switch,
  .auth-link,
  .user-trigger,
  .language-trigger,
  .language-menu,
  .user-menu {
    width: 100%;
  }

  .language-menu,
  .user-menu {
    position: static;
    margin-top: 10px;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, var(--container));
  }

  .brand {
    font-size: 18px;
  }

  .site-main > h1,
  .site-main > p {
    width: min(100% - 28px, 920px);
  }
}