@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/vazirmatn-variable.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('../fonts/jetbrains-mono-regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('../fonts/jetbrains-mono-bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --background: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --brand: #fed82a;
  --brand-dim: #c9a800;
  --brand-ink: #0d1117;
  --ok: #3fb950;
  --danger: #f85149;
  --font-fa: 'Vazirmatn', Tahoma, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 50% 0%, #1a1a12 0%, var(--background) 60%);
  color: var(--text);
  font-family: var(--font-fa);
  font-size: 15px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

header .brand {
  font-family: var(--font-mono);
  color: var(--brand);
  letter-spacing: 0.1em;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-inline-start: 1rem;
  transition: color 0.15s;
}

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

main {
  max-width: 44rem;
  margin: 3rem auto;
  padding: 0 1.5rem;
}

main.wide {
  max-width: 60rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}

.ascii-logo {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 4.4vw, 1.9rem);
  line-height: 1;
  font-weight: 400;
  direction: ltr;
  display: block;
  width: max-content;
  max-width: 100%;
  margin: 0 auto 0.75rem;
  color: var(--brand);
  text-shadow: 0 0 28px rgba(254, 216, 42, 0.3);
  white-space: pre;
}

.page-title {
  font-family: var(--font-fa);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0;
  color: var(--brand);
  text-shadow: 0 0 28px rgba(254, 216, 42, 0.3);
}

.lead {
  margin: 0.5rem 0 2rem;
  text-align: center;
  color: var(--muted);
}

.countdown {
  margin: 0 0 2rem;
}

.countdown-lead {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.countdown-units {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  direction: ltr;
}

.countdown .unit {
  flex: 1 1 0;
  text-align: center;
  padding: 0.7rem 0.35rem 0.55rem;
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.countdown .value {
  display: block;
  margin: 0;
  direction: ltr;
  text-align: center;
  white-space: pre;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--brand);
  padding-bottom: 0.12em;
}

.countdown .label {
  display: block;
  text-align: center;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.countdown-when {
  margin: 0.9rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  direction: ltr;
  text-align: center;
  transition: border-color 0.15s;
}

#nickname {
  font-family: var(--font-fa);
  direction: rtl;
}

input:focus {
  outline: none;
  border-color: var(--brand);
}

button {
  margin-top: 1rem;
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--brand);
  border: none;
  border-radius: 8px;
  color: var(--brand-ink);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s;
}

button:hover:not(:disabled) {
  filter: brightness(1.12);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

button.link {
  width: auto;
  margin-top: 0.75rem;
  padding: 0;
  background: none;
  color: var(--muted);
  font-weight: normal;
  text-decoration: underline;
}

button.link:hover:not(:disabled) {
  filter: none;
  color: var(--text);
}

.message {
  margin-top: 1.25rem;
  color: var(--danger);
}

.message:empty {
  display: none;
}

.message.ok {
  color: var(--ok);
}

.panel-note {
  margin-top: 1.5rem;
  padding: 1rem;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: var(--background);
  color: var(--muted);
}

.panel-note p {
  margin: 0;
}

.panel-note .hint-lead {
  margin-bottom: 0.25rem;
}

.panel-note .answer {
  margin: 0.25rem 0 0.75rem;
}

.panel-note .answer code {
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

.panel-note .hint-aside {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  opacity: 0.8;
}

.panel-note a {
  color: var(--brand);
}

.panel-note code {
  font-family: var(--font-mono);
  color: var(--brand);
  direction: ltr;
  display: inline-block;
}

.order-toggle {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.chip {
  width: auto;
  margin: 0;
  padding: 0.35rem 0.9rem;
  font-size: 0.85rem;
  font-weight: normal;
  background: var(--background);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 999px;
}

.chip:hover:not(:disabled) {
  filter: none;
  color: var(--text);
}

.chip.is-on {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--brand-ink);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 0.75rem 1rem;
  text-align: right;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: normal;
  font-size: 0.9rem;
}

.table-scroll {
  overflow-x: auto;
}

td.rank,
td.id,
td.score,
td.solved,
td.phone,
td.time {
  font-family: var(--font-mono);
  direction: ltr;
  text-align: left;
}

td.nickname {
  white-space: nowrap;
}

@media (max-width: 40rem) {
  .countdown .unit {
    flex: 0 0 calc(50% - 0.25rem);
    padding: 0.6rem 0.25rem 0.5rem;
  }

  .countdown .value {
    font-size: 1rem;
  }

  th.phone,
  td.phone,
  th.time,
  td.time {
    display: none;
  }

  main {
    padding: 0 0.75rem;
  }

  .card {
    padding: 1.25rem;
  }

  th,
  td {
    padding: 0.6rem 0.5rem;
  }
}

tr.podium-1 td.rank {
  color: var(--brand);
  font-weight: 700;
}

td.id {
  color: var(--muted);
}

tr.podium-2 td.rank,
tr.podium-3 td.rank {
  color: var(--muted);
}

tr.me {
  background: rgba(254, 216, 42, 0.07);
}

.empty {
  color: var(--muted);
  text-align: center;
  padding: 2rem 0;
}

.charm {
  margin: 1.2rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.note {
  margin: 0.35rem 0 0;
  font-size: 0.95rem;
  line-height: 1.9;
  opacity: 0.85;
}