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

:root {
  --color-ink: #18181b;
  --color-muted: #52525b;
  --color-accent: #6d28d9;
  --color-accent-soft: #ede9fe;
  --color-error: #be123c;
  --color-surface: rgba(255, 255, 255, .92);
  --color-border: rgba(255, 255, 255, .8);
  --shadow-card: 0 8px 24px -12px rgba(76, 29, 149, .15);
  --shadow-login: 0 24px 60px -24px rgba(76, 29, 149, .35);
  --radius-md: 14px;
  --radius-lg: 28px;
  --radius-pill: 999px;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  background: radial-gradient(40% 50% at 15% 20%, #ddd6fe, transparent 80%),
    radial-gradient(35% 45% at 85% 25%, #fecdd3, transparent 80%),
    radial-gradient(45% 50% at 60% 95%, #bfdbfe, transparent 80%),
    #f5f0ff;
  background-attachment: fixed;
  color: var(--color-ink);
}

h1, h2, h3 {
  margin: 0;
  color: var(--color-ink);
  font-weight: 600;
}

h1 { font-size: 36px; line-height: 46px; }
h2 { font-size: 24px; line-height: 32px; }

p, li {
  font-size: 16px;
  line-height: 25px;
  color: var(--color-muted);
  margin: 0;
}

ul { margin: 0; padding: 0; }

a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}

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

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 15px;
}

.container-narrow {
  max-width: 800px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -15px;
}

.col-12 { flex: 0 0 100%; max-width: 100%; padding: 0 15px; }

@media (min-width: 992px) {
  .col-lg-5, .col-lg-7 { padding: 0 15px; }
  .col-lg-5 { flex: 0 0 41.67%; max-width: 41.67%; }
  .col-lg-7 { flex: 0 0 58.33%; max-width: 58.33%; }
}

/* --- Topbar --- */

.topbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 15px;
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--color-ink);
}

.topbar-actions {
  display: flex;
  gap: 10px;
}

/* --- Buttons --- */

.btn {
  display: inline-block;
  font-size: 14px;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, transform 0.15s;
  background: transparent;
  color: var(--color-muted);
}

.btn:hover {
  background: #f4f4f5;
  color: var(--color-ink);
}

.btn:active {
  transform: scale(.99);
}

.btn-dark {
  background: var(--color-ink);
  color: #fff;
}

.btn-dark:hover {
  background: #3f3f46;
  color: #fff;
}

/* --- Hero (index) --- */

.hero {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  padding: 32px 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-login);
}

.hero__badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
}

.hero__title {
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: -.02em;
}

.hero__text {
  font-size: 17px;
  line-height: 28px;
}

/* --- About section (index) --- */

.about {
  padding: 100px 0;
}

.about-row {
  align-items: flex-start;
}

@media (min-width: 992px) {
  .about-row .col-lg-5 { flex: 0 0 58%; max-width: 58%; }
  .about-row .col-lg-7 { flex: 0 0 42%; max-width: 42%; }
}

.about-left {
  position: sticky;
  top: 90px;
}

.about-right {
  display: flex;
  flex-direction: column;
}

/* --- Cards --- */

.card {
  padding: 14px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

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

.card h3 {
  margin: 0 0 5px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
}

.card p {
  margin: 0;
  font-size: 13px;
  line-height: 19px;
}

/* --- Wiki page --- */

.page {
  padding: 60px 0;
}

.intro {
  margin-bottom: 50px;
}

.intro h1 {
  font-size: 36px;
  line-height: 46px;
  margin-bottom: 12px;
}

.intro p {
  font-size: 18px;
}

.block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 24px;
  margin-bottom: 20px;
}

.block h2 {
  font-size: 24px;
  line-height: 32px;
  margin-bottom: 12px;
  margin-top: 0;
}

/* --- FAQ (wiki) --- */

.faq {
  margin-top: 50px;
}

.faq > h2 {
  font-size: 24px;
  line-height: 32px;
  margin-bottom: 20px;
}

.spoiler {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  margin-bottom: 10px;
  overflow: hidden;
}

.spoiler summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.spoiler summary::-webkit-details-marker {
  display: none;
}

.spoiler summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-muted);
  transition: transform 0.2s;
}

.spoiler[open] summary::after {
  transform: rotate(45deg);
}

.spoiler p {
  padding: 0 20px 16px 20px;
  font-size: 15px;
}

/* --- Footer --- */

.footer {
  text-align: center;
  padding: 5px 0;
}

.copyright {
  font-size: 13px;
  color: var(--color-muted);
}

/* --- Donate --- */

.donate-box {
  text-align: center;
}

.donate-box iframe {
  border: 0;
  background: transparent;
}

/* --- Contacts --- */

.contacts p {
  white-space: pre-line;
}

/* --- Login --- */

.login-page {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  place-items: center;
  min-height: 100vh;
  box-sizing: border-box;
  padding: 40px 16px;
}

.login {
  width: 100%;
  max-width: 440px;
  box-sizing: border-box;
  padding: 32px clamp(20px, 6vw, 36px) 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-login);
  color: var(--color-ink);
  line-height: 1.5;
}

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

.login [hidden] {
  display: none !important;
}

.login__lang {
  position: fixed;
  top: 16px;
  right: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 36px;
  padding: 0 12px;
  border: none;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-muted);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.login__lang:hover {
  background: #f4f4f5;
  color: var(--color-ink);
}

.login {
  position: relative;
}

.login__head {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 12px;
  align-items: center;
  margin-bottom: 24px;
}

.login__logo {
  grid-row: span 2;
}

.login__brand {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
}

.login__tagline {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.login__tabs {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 4px;
  border-radius: var(--radius-pill);
  background: #f4f4f5;
}

.login__thumb {
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 4px;
  width: calc(50% - 4px);
  border-radius: var(--radius-pill);
  background: #fff;
  box-shadow: 0 1px 3px rgba(24, 24, 27, .12), 0 4px 10px -4px rgba(76, 29, 149, .25);
  transition: transform .3s cubic-bezier(.3, .7, .2, 1);
}

.login__tabs.is-second .login__thumb {
  transform: translateX(100%);
}

.login__tab {
  position: relative;
  z-index: 1;
  min-height: 42px;
  border: 0;
  border-radius: var(--radius-pill);
  background: none;
  color: var(--color-muted);
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: color .2s ease;
}

.login__tab[aria-selected="true"],
.login__tab:hover {
  color: var(--color-ink);
}

.login__panels {
  overflow: hidden;
}

.login__panel {
  padding-top: 24px;
  border-radius: 12px;
}

.login__field {
  margin-bottom: 14px;
}

.login__label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 600;
}

.login__input {
  display: block;
  width: 100%;
  min-height: 46px;
  padding: 10px 14px;
  border: 1px solid #d4d4d8;
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--color-ink);
  font: inherit;
  font-size: 15px;
  transition: border-color .15s ease, box-shadow .15s ease;
}

.login__input:hover {
  border-color: #a1a1aa;
}

.login__input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.login__pw {
  position: relative;
}

.login__pw .login__input {
  padding-right: 50px;
}

.login__eye {
  position: absolute;
  top: 4px;
  right: 4px;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
}

.login__eye:hover {
  background: #f4f4f5;
  color: var(--color-ink);
}

.login__eye-off,
.login__eye[aria-pressed="true"] .login__eye-on {
  display: none;
}

.login__eye[aria-pressed="true"] .login__eye-off {
  display: block;
}

.login__hint {
  margin: 6px 0 0;
  color: var(--color-muted);
  font-size: 13px;
}

.login__link {
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 4px;
}

.login__submit {
  width: 100%;
  min-height: 50px;
  margin-top: 6px;
  border: 0;
  border-radius: var(--radius-md);
  background: var(--color-ink);
  color: #fff;
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color .15s ease, transform .15s ease;
}

.login__submit:hover {
  background: #3f3f46;
}

.login__submit:active {
  transform: scale(.99);
}

.login__back-btn {
  width: 100%;
  padding: 8px 20px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: none;
  color: var(--color-ink);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.login__back-btn:hover {
  background: var(--color-ink);
  color: #fff;
}

.login__swap {
  margin: 16px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  text-align: center;
}

.login__tab:focus-visible,
.login__panel:focus-visible,
.login__eye:focus-visible,
.login__link:focus-visible,
.login__submit:focus-visible,
.login__back-btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.login__error {
  margin: 6px 0 0;
  color: var(--color-error);
  font-size: 13px;
  font-weight: 500;
}

.login__error:empty {
  display: none;
}

.login__field.is-error .login__input {
  border-color: var(--color-error);
}

.login__demo {
  margin: 18px 0 0;
  color: #5f5f68;
  font-size: 12px;
  text-align: center;
}

/* --- Responsive --- */

@media (max-width: 991px) {
  .about {
    padding: 60px 0;
  }

  .about-left {
    position: static;
    margin-bottom: 40px;
  }

  .hero {
    align-items: center;
    text-align: center;
  }

  .hero__title {
    font-size: 32px;
  }

  .hero__text {
    font-size: 16px;
    line-height: 26px;
  }

  .card {
    padding: 14px 16px;
  }

  .card h3 {
    font-size: 14px;
    margin-bottom: 4px;
  }

  .card p {
    font-size: 12px;
  }

  .page {
    padding: 40px 0;
  }

  .intro p {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .login *,
  .login *::before,
  .login *::after {
    transition: none !important;
    animation: none !important;
  }
}