/* eshchess — login page of a password-protected server. Same slate & brass palette as style.css. */

:root {
  --bg: #15181c;
  --bg-2: #1a1e23;
  --card: #1f242a;
  --card-2: #252b32;
  --line: #2e353d;
  --line-2: #3a424b;
  --text: #e8e3d8;
  --text-2: #b9b4a9;
  --muted: #a0a7a2;
  --accent: #d6a44e;
  --accent-ink: #1b1608;
  --accent-soft: rgba(214, 164, 78, 0.14);
  --danger: #e07a70;
  --danger-soft: rgba(217, 104, 93, 0.14);
  --radius: 10px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --font: 'Segoe UI Variable Text', 'Segoe UI', system-ui, -apple-system, 'Noto Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, 'Book Antiqua', Georgia, serif;
  color-scheme: dark;
}

/* One page, two languages: the server picks <html lang>, the switcher changes it. */
html[lang='ru'] [lang='en']:not([data-lang]),
html[lang='en'] [lang='ru']:not([data-lang]) {
  display: none !important;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(214, 164, 78, 0.08), transparent 60%),
    repeating-conic-gradient(rgba(255, 255, 255, 0.018) 0 25%, transparent 0 50%) 0 0 / 96px 96px,
    var(--bg);
  color: var(--text);
  font: 14px/1.45 var(--font);
  -webkit-font-smoothing: antialiased;
}

[hidden] {
  display: none !important;
}

.login {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
}

.card {
  width: min(400px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  padding: 28px 28px 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.brand img {
  border-radius: 10px;
  flex: none;
}

h1 {
  margin: 0;
  font: 600 24px/1.1 var(--font-serif);
  letter-spacing: 0.01em;
}

.sub {
  margin: 4px 0 0;
  color: var(--text-2);
  font-size: 13px;
}

.form {
  display: grid;
  gap: 10px;
}

.label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-2);
}

.field {
  display: flex;
  align-items: stretch;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field.invalid {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px var(--danger-soft);
}

.field input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 16px;
  padding: 11px 12px;
  outline: none;
}

.reveal {
  border: 0;
  border-left: 1px solid var(--line);
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 12.5px;
  padding: 0 12px;
  cursor: pointer;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.reveal:hover {
  color: var(--text);
}

.reveal:focus-visible,
.btn:focus-visible,
.langs button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.error {
  margin: 0;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 13px;
}

.btn {
  margin-top: 6px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 600;
  font-size: 15px;
  padding: 11px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: filter 0.15s, opacity 0.15s;
}

.btn:hover {
  filter: brightness(1.08);
}

.btn:disabled {
  opacity: 0.6;
  cursor: progress;
}

.hint {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12.5px;
}

.langs {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.langs button {
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 12.5px;
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
}

.langs button:hover {
  color: var(--text);
}

.langs button[aria-pressed='true'] {
  color: var(--text);
  border-color: var(--line-2);
  background: var(--card-2);
}

.noscript {
  text-align: center;
  color: var(--text-2);
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}