/* Wars on Paper — white, minimal interface.
   Structure comes from whitespace and hairline rules, not cards or shadows. */

:root {
  --white: #ffffff;
  --ink: #111111;
  --ink-soft: #6f6f6f;
  --ink-faint: #b5b5b5;
  --line: #ececec;
  --line-strong: #d9d9d9;
  --accent: #e0492f;
  --font-sans: 'Inter', 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', system-ui, sans-serif;
  --font-display: Georgia, 'Times New Roman', 'Songti SC', 'Noto Serif SC', serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  background: var(--white);
}

body {
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: rgba(224, 73, 47, 0.14);
}

.screen {
  display: flex;
  min-height: 100vh;
  align-items: flex-start;
  justify-content: center;
  padding: 64px clamp(32px, 9vw, 160px);
}

.column {
  width: min(700px, 100%);
}

h1 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.3em;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.4vw, 3.2rem);
  font-weight: 400;
  letter-spacing: -0.012em;
  line-height: 1.12;
}

.title-zh {
  letter-spacing: 0.06em;
}

.title-sep {
  color: var(--ink-faint);
  font-size: 0.82em;
  font-weight: 300;
}

  .title-en {
  font-style: italic;
  font-size: 0.95em;
  letter-spacing: -0.015em;
}

.tagline {
  max-width: 26em;
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.9;
}

.menu {
  max-width: 460px;
  margin-top: 64px;
  border-top: 1px solid var(--line);
}

.menu-item {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: baseline;
  gap: 16px;
  width: 100%;
  margin: 0;
  padding: 20px 4px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
  transition:
    background-color 0.15s ease,
    padding-left 0.15s ease;
}

.menu-item:hover:not(:disabled) {
  padding-left: 10px;
  background: #fafafa;
}

.menu-item:hover:not(:disabled) .menu-index,
.menu-item:hover:not(:disabled) .menu-note {
  color: var(--accent);
}

.menu-item:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: -2px;
}

.menu-item:disabled {
  cursor: not-allowed;
  color: var(--ink-faint);
}

.menu-index {
  color: var(--ink-faint);
  font-size: 0.68rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.14em;
  transition: color 0.15s ease;
}

.menu-label {
  font-weight: 400;
}

.menu-note {
  color: var(--ink-faint);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  transition: color 0.15s ease;
}

.notice {
  min-height: 1.5em;
  margin: 20px 0 0;
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.7;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.notice.is-visible {
  opacity: 1;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 20px;
  margin-top: 72px;
  color: var(--ink-faint);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.footer-link {
  color: var(--ink-faint);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.footer-link:hover {
  color: var(--ink);
  border-color: var(--ink);
}

@media (max-width: 520px) {
  .screen {
    align-items: stretch;
    padding: 40px 22px;
  }

  .menu {
    margin-top: 48px;
  }

  .menu-item {
    grid-template-columns: 34px 1fr auto;
    gap: 12px;
    padding: 17px 2px;
  }

  .footer {
    margin-top: 56px;
  }
}