:root {
  --bg: #0a0e14;
  --panel: #12161f;
  --panel-border: #232b3a;
  --text: #d8e0ee;
  --text-dim: #7d8aa3;
  --accent: #4fd1c5;
  --accent-dim: #2a5c57;
  --danger: #e5626b;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

/* Any element using the `hidden` attribute must actually stay hidden, even
   when another rule here sets `display` on the same element (author rules
   beat the UA's [hidden]{display:none} regardless of specificity). */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  overflow: hidden;
}

.screen { height: 100%; width: 100%; }

/* ---------------- login ---------------- */

#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 2.5rem;
  width: min(90vw, 360px);
}

.login-card h1 {
  margin: 0;
  letter-spacing: 0.08em;
  font-size: 1.5rem;
}

.subtitle {
  color: var(--text-dim);
  margin: 0.25rem 0 1.5rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

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

.tab-btn {
  flex: 1;
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  padding: 0.5rem;
  border-radius: 6px;
  cursor: pointer;
}

.tab-btn.active { color: var(--accent); border-color: var(--accent-dim); }

.tab-panel { display: none; flex-direction: column; gap: 1rem; }
.tab-panel.active { display: flex; }

label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.85rem; color: var(--text-dim); }

input, button {
  font-family: inherit;
  font-size: 1rem;
}

input {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 0.6rem 0.7rem;
  border-radius: 6px;
}

button {
  background: var(--accent-dim);
  color: var(--text);
  border: 1px solid var(--accent);
  padding: 0.6rem 0.9rem;
  border-radius: 6px;
  cursor: pointer;
}

button:hover { filter: brightness(1.15); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.hint { color: var(--text-dim); font-size: 0.75rem; margin: 0.5rem 0 0; }
.error { color: var(--danger); font-size: 0.85rem; margin-top: 1rem; }

/* ---------------- game screen ---------------- */

#game-screen { display: flex; flex-direction: column; }

#topbar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--panel);
  border-bottom: 1px solid var(--panel-border);
  z-index: 2;
}

.brand { font-weight: 600; letter-spacing: 0.08em; }

.bracket-toggle { display: flex; gap: 0.4rem; }

.bracket-btn {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  padding: 0.35rem 0.9rem;
  border-radius: 20px;
  font-size: 0.85rem;
}

.bracket-btn.active { color: var(--bg); background: var(--accent); border-color: var(--accent); }

.whoami { margin-left: auto; display: flex; align-items: center; gap: 1rem; font-size: 0.85rem; color: var(--text-dim); }
.whoami a { color: var(--accent); text-decoration: none; }
.whoami button { padding: 0.35rem 0.7rem; font-size: 0.8rem; }

#board-canvas {
  position: absolute;
  top: 52px;
  left: 0;
  right: 0;
  bottom: 0;
  display: block;
}

#tile-tooltip {
  position: fixed;
  pointer-events: none;
  background: rgba(18, 22, 31, 0.95);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 0.5rem 0.7rem;
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--text);
  z-index: 5;
  white-space: nowrap;
}

#tile-tooltip .owner { font-weight: 600; }
#tile-tooltip .fortified { color: var(--accent); }
#tile-tooltip .bonus { color: #e0a458; font-weight: 600; }

#sidebar {
  position: absolute;
  top: 68px;
  right: 16px;
  width: 300px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 2;
}

#sidebar section {
  background: rgba(18, 22, 31, 0.9);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  backdrop-filter: blur(6px);
}

#sidebar h2 {
  margin: 0 0 0.6rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.stat { display: flex; justify-content: space-between; align-items: baseline; }
.stat .label { color: var(--text-dim); font-size: 0.85rem; }
#reserve-count { font-size: 1.5rem; color: var(--accent); font-weight: 600; }

#tile-info { font-size: 0.85rem; color: var(--text-dim); margin-bottom: 0.6rem; }

#deploy-controls, #fortify-controls, #attack-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

#deploy-controls input, #attack-controls input { width: 5rem; }

#standings-list, #activity-list { list-style: none; padding: 0; margin: 0; font-size: 0.85rem; }
#activity-list li {
  display: flex;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--panel-border);
  color: var(--text-dim);
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
}
#activity-list li:last-child { border-bottom: none; }

.leaderboard-row {
  display: grid;
  grid-template-columns: 1.6rem 1fr auto;
  align-items: center;
  column-gap: 0.6rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--panel-border);
}
.leaderboard-row:last-child { border-bottom: none; }
.leaderboard-row .rank { text-align: center; color: var(--text-dim); font-weight: 600; font-size: 0.8rem; }
.leaderboard-row .rank.medal { font-size: 1.05rem; }
.leaderboard-row .name { font-weight: 500; }
.leaderboard-row.eliminated .name { color: var(--danger); }
.leaderboard-row .score-wrap { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.2; }
.leaderboard-row .score { font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.leaderboard-row .sub { font-size: 0.7rem; color: var(--text-dim); }