/* ─────────────────────────────────────────────────────────────────────────────
   BATTLESHIPS – Style Sheet
   Naval dark theme · Mobile-first · Responsive 10×10 grid
───────────────────────────────────────────────────────────────────────────── */

/* ── Reset & base ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy-deep:    #060f1e;
  --navy-dark:    #0a1628;
  --navy-mid:     #0d2040;
  --navy-light:   #1a3a5c;
  --ocean:        #1a9fd4;
  --ocean-dim:    #137aaa;
  --gold:         #f4a261;
  --text-light:   #e8f4fd;
  --text-muted:   #7bafc8;
  --ship-green:   #2d6a4f;
  --ship-hit:     #e63946;
  --miss-blue:    #457b9d;
  --preview-ok:   rgba(82, 183, 136, 0.55);
  --preview-bad:  rgba(230, 57, 70, 0.50);
  --cell-size:    clamp(26px, 7vw, 38px);
  --border-radius: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.5);
}

html, body {
  height: 100%;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--navy-deep);
  color: var(--text-light);
  overflow-x: hidden;
}

/* ── Screens ─────────────────────────────────────────────────────────────── */
.screen {
  display: none;
  min-height: 100dvh;
  padding: 16px;
  animation: fadeIn 0.25s ease;
}
.screen.active { display: flex; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.screen-inner {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
}
.center-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding-top: 32px;
}

/* ── Typography ──────────────────────────────────────────────────────────── */
.title {
  font-size: clamp(2rem, 8vw, 3.2rem);
  font-weight: 900;
  letter-spacing: 0.12em;
  color: var(--gold);
  text-shadow: 0 0 30px rgba(244,162,97,0.4);
  text-align: center;
}
.title.compact { font-size: 1.6rem; }
.screen-title { font-size: 1.4rem; font-weight: 700; color: var(--gold); margin-bottom: 6px; }
.section-label { font-size: 1rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
button { cursor: pointer; border: none; border-radius: var(--border-radius); font-size: 1rem; font-weight: 600; transition: all 0.15s; }

.btn-primary {
  background: var(--ocean);
  color: #fff;
  padding: 14px 36px;
  font-size: 1.05rem;
  border-radius: 50px;
  box-shadow: 0 4px 16px rgba(26,159,212,0.35);
  min-width: 180px;
}
.btn-primary:hover  { background: var(--ocean-dim); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(26,159,212,0.5); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { background: #2a4a6a; color: #5a7a9a; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-secondary {
  background: transparent;
  color: var(--ocean);
  border: 2px solid var(--ocean);
  padding: 10px 24px;
  border-radius: 50px;
}
.btn-secondary:hover { background: rgba(26,159,212,0.12); }
.btn-secondary.small { padding: 7px 14px; font-size: 0.85rem; }
.btn-secondary.danger { color: var(--ship-hit); border-color: var(--ship-hit); }
.btn-secondary.danger:hover { background: rgba(230,57,70,0.12); }

.btn-confirm {
  background: var(--gold);
  color: var(--navy-deep);
  border: none;
  border-radius: 50px;
  padding: 12px 20px;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 0 4px 14px rgba(244,162,97,0.4);
  letter-spacing: 0.03em;
}
.btn-confirm:hover:not(:disabled)  { background: #e8923a; transform: translateY(-2px); box-shadow: 0 6px 18px rgba(244,162,97,0.55); }
.btn-confirm:active:not(:disabled) { transform: translateY(0); }
.btn-confirm:disabled { background: #3a3020; color: #6a5a3a; cursor: not-allowed; box-shadow: none; }

kbd {
  background: var(--navy-light);
  color: var(--text-muted);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.75rem;
  font-family: monospace;
}

/* ── Home – Rules cards ──────────────────────────────────────────────────── */
.rule-cards {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.rule-card {
  background: var(--navy-mid);
  border: 2px solid var(--navy-light);
  border-radius: 12px;
  padding: 20px 24px;
  width: 160px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
}
.rule-card:hover { border-color: var(--ocean); background: rgba(26,159,212,0.08); }
.rule-card.selected { border-color: var(--ocean); background: rgba(26,159,212,0.14); box-shadow: 0 0 0 3px rgba(26,159,212,0.25); }
.rule-icon { font-size: 1.8rem; margin-bottom: 6px; }
.rule-card h3 { font-size: 1rem; font-weight: 700; color: var(--text-light); margin-bottom: 6px; }
.rule-card p  { font-size: 0.78rem; color: var(--text-muted); line-height: 1.4; }

.home-buttons { display: flex; flex-direction: column; align-items: center; gap: 12px; width: 100%; }

/* ── Lobby ───────────────────────────────────────────────────────────────── */
.qr-box {
  background: #fff;
  padding: 12px;
  border-radius: 12px;
  display: inline-block;
  box-shadow: var(--shadow);
}
.qr-box canvas, .qr-box img { display: block; }

.room-code-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.room-code-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; }
.room-code-value {
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: 0.3em;
  color: var(--gold);
  font-family: 'Courier New', monospace;
}

.hint-text { font-size: 0.85rem; color: var(--text-muted); }

.badge {
  background: var(--navy-mid);
  border: 1px solid var(--navy-light);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 0.82rem;
  color: var(--ocean);
}

.status-pill {
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
}
.status-pill.waiting { background: rgba(244,162,97,0.12); border: 1px solid rgba(244,162,97,0.3); color: var(--gold); }
.status-pill.ready   { background: rgba(26,159,212,0.12); border: 1px solid rgba(26,159,212,0.4); color: var(--ocean); }

/* ── Join screen ─────────────────────────────────────────────────────────── */
.code-input {
  background: var(--navy-mid);
  border: 2px solid var(--navy-light);
  border-radius: var(--border-radius);
  color: var(--text-light);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-align: center;
  text-transform: uppercase;
  padding: 14px 20px;
  width: 280px;
  outline: none;
  font-family: 'Courier New', monospace;
}
.code-input:focus { border-color: var(--ocean); box-shadow: 0 0 0 3px rgba(26,159,212,0.2); }
.error-msg { color: var(--ship-hit); font-size: 0.88rem; min-height: 20px; }

/* ── Placement screen ────────────────────────────────────────────────────── */
.opponent-status { font-size: 0.85rem; color: var(--ocean); min-height: 20px; margin-bottom: 4px; }

.placement-layout {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.placement-sidebar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 170px;
  flex-shrink: 0;
}

.ship-list { display: flex; flex-direction: column; gap: 5px; }
.ship-list h3 { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 4px; }

.ship-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--navy-mid);
  border: 1px solid var(--navy-light);
  border-radius: 6px;
  padding: 7px 10px;
  font-size: 0.85rem;
  transition: all 0.15s;
}
.ship-item.active { border-color: var(--ocean); background: rgba(26,159,212,0.1); color: var(--ocean); font-weight: 700; }
.ship-item.placed { opacity: 0.4; text-decoration: line-through; }
.ship-name { flex: 1; }
.ship-cells { color: var(--ship-green); font-size: 0.75rem; letter-spacing: 1px; }
.ship-item.placed .ship-cells { color: var(--text-muted); }
.ship-item.active .ship-cells { color: var(--ocean); }

.orientation-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.orient-label { font-size: 0.8rem; color: var(--text-muted); }

.placement-hint { font-size: 0.82rem; color: var(--ocean); min-height: 20px; }

.grid-wrap { overflow: auto; }

/* ── The Grid ────────────────────────────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: 24px repeat(10, var(--cell-size));
  gap: 2px;
  user-select: none;
}

.grid-corner { width: 24px; height: 24px; }

.grid-header {
  width: var(--cell-size);
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
}
.grid-header.row-header { width: 24px; }

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  border-radius: 3px;
  background: var(--navy-mid);
  border: 1px solid var(--navy-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.6rem, 2vw, 0.85rem);
  transition: background 0.1s, transform 0.1s;
  cursor: default;
}

/* Placement states */
.cell.has-ship    { background: var(--ship-green); border-color: #3d8a66; }
.cell.staging     { background: rgba(244,162,97,0.55); border-color: var(--gold); box-shadow: 0 0 0 2px rgba(244,162,97,0.4); }
.cell.preview-ok  { background: var(--preview-ok); border-color: #52b788; }
.cell.preview-bad { background: var(--preview-bad); border-color: var(--ship-hit); }

/* Battle states */
.cell.hit-enemy   { background: var(--ship-hit); border-color: #c0303b; }
.cell.hit-enemy::after { content: '✕'; color: #fff; font-weight: 900; font-size: 0.8em; }

.cell.miss-enemy  { background: var(--miss-blue); border-color: #3a6a8a; }
.cell.miss-enemy::after { content: '○'; color: rgba(255,255,255,0.7); font-size: 0.8em; }

.cell.hit-mine    { background: var(--ship-hit); border-color: #c0303b; }
.cell.hit-mine::after { content: '✕'; color: #fff; font-weight: 900; font-size: 0.8em; }

.cell.miss-mine   { background: var(--miss-blue); border-color: #3a6a8a; }
.cell.miss-mine::after { content: '○'; color: rgba(255,255,255,0.7); font-size: 0.8em; }

.attack-grid .cell:not(.hit-enemy):not(.miss-enemy) { cursor: crosshair; }
.attack-grid .cell:not(.hit-enemy):not(.miss-enemy):hover { background: rgba(26,159,212,0.25); border-color: var(--ocean); transform: scale(1.1); z-index: 1; }
.attack-grid.locked .cell { cursor: not-allowed; }
.attack-grid.locked .cell:hover { background: var(--navy-mid); border-color: var(--navy-light); transform: none; }

/* ── Battle screen ───────────────────────────────────────────────────────── */
.battle-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.turn-indicator {
  padding: 8px 18px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  flex: 1;
  text-align: center;
}
.turn-indicator.my-turn    { background: rgba(26,159,212,0.18); border: 1px solid var(--ocean); color: var(--ocean); }
.turn-indicator.their-turn { background: rgba(244,162,97,0.12); border: 1px solid rgba(244,162,97,0.4); color: var(--gold); }

.rules-indicator { font-size: 0.78rem; color: var(--text-muted); white-space: nowrap; }

.battle-layout {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.battle-board-wrap { display: flex; flex-direction: column; gap: 6px; }
.board-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; }

.battle-log {
  background: var(--navy-mid);
  border: 1px solid var(--navy-light);
  border-radius: var(--border-radius);
  padding: 10px 14px;
  max-height: 180px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.log-entry { font-size: 0.83rem; padding: 3px 0; border-bottom: 1px solid rgba(255,255,255,0.04); color: var(--text-muted); }
.log-entry:last-child { border: none; }
.log-hit   { color: #ff8f9e; }
.log-miss  { color: #7bafc8; }
.log-sunk  { color: var(--gold); font-weight: 700; }
.log-info  { color: var(--ocean); }

/* ── Game over screen ────────────────────────────────────────────────────── */
.gameover-result { text-align: center; }
.gameover-result .win  { display: block; font-size: 4rem; }
.gameover-result .loss { display: block; font-size: 4rem; }
.gameover-result p { font-size: 1.1rem; color: var(--text-muted); margin-top: 8px; }

/* ── Home subtitle ──────────────────────────────────────────────────────────────────── */
.home-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 340px;
  line-height: 1.5;
}

/* ── Spectator screen ───────────────────────────────────────────────────────────── */
.spectator-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.spectator-status-bar {
  flex: 1;
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  background: rgba(26,159,212,0.1);
  border: 1px solid rgba(26,159,212,0.3);
  color: var(--ocean);
  text-align: center;
}

.spectator-layout {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.spectator-board-wrap { display: flex; flex-direction: column; gap: 6px; }

.spectator-divider {
  font-size: 2rem;
  align-self: center;
  color: var(--gold);
  padding: 0 4px;
  flex-shrink: 0;
}

.board-label.spectator-p1 { color: var(--ocean); }
.board-label.spectator-p2 { color: var(--gold); }

.spectator-log { max-height: 220px; }
/* Placed-ship flash animation */
@keyframes cellFlash {
  0%   { background: var(--gold); border-color: #e09040; transform: scale(1.15); }
  60%  { background: var(--ship-green); border-color: #3d8a66; transform: scale(1.05); }
  100% { background: var(--ship-green); border-color: #3d8a66; transform: scale(1); }
}
.cell-flash { animation: cellFlash 0.4s ease forwards; z-index: 2; }
/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  :root { --cell-size: clamp(24px, 8.5vw, 32px); }

  .battle-layout { flex-direction: column; gap: 14px; }
  .placement-layout { flex-direction: column; }
  .placement-sidebar { flex-direction: row; flex-wrap: wrap; align-items: flex-start; gap: 8px; }
  .ship-list { flex-direction: row; flex-wrap: wrap; }
  .ship-item { font-size: 0.75rem; padding: 5px 8px; }
  .orientation-row { width: 100%; }
  .battle-header { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 860px) {
  .screen { align-items: center; justify-content: flex-start; }
  .battle-layout { flex-wrap: nowrap; }
}

/* ── Name picker ─────────────────────────────────────────────────────────── */
.name-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 100%;
  max-width: 340px;
}

.name-btn {
  background: var(--navy-mid);
  border: 2px solid var(--navy-light);
  border-radius: 16px;
  color: var(--text-light);
  font-size: 1.5rem;
  font-weight: 700;
  padding: 28px 16px;
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1.4;
}
.name-btn:hover  { border-color: var(--gold); background: rgba(244,162,97,0.1); transform: translateY(-3px); box-shadow: 0 6px 20px rgba(244,162,97,0.25); }
.name-btn:active { transform: translateY(0); }

/* ── Home – player chip ──────────────────────────────────────────────────── */
.player-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--navy-mid);
  border: 1px solid var(--navy-light);
  border-radius: 50px;
  padding: 7px 14px 7px 18px;
  font-size: 0.9rem;
  color: var(--gold);
  font-weight: 600;
}

.btn-chip {
  background: transparent;
  border: 1px solid var(--navy-light);
  border-radius: 50px;
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 3px 10px;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-chip:hover { border-color: var(--ocean); color: var(--ocean); }

.btn-leaderboard {
  background: transparent;
  border: 2px solid var(--gold);
  border-radius: 50px;
  color: var(--gold);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 10px 28px;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-leaderboard:hover { background: rgba(244,162,97,0.1); transform: translateY(-2px); }

/* ── Leaderboard ─────────────────────────────────────────────────────────── */
.leaderboard-table {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.lb-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--navy-mid);
  border: 1px solid var(--navy-light);
  border-radius: 12px;
  padding: 14px 16px;
  transition: all 0.15s;
}
.lb-row.lb-me { border-color: var(--gold); background: rgba(244,162,97,0.08); }

.lb-medal  { font-size: 1.4rem; width: 28px; text-align: center; flex-shrink: 0; }
.lb-avatar { font-size: 1.6rem; flex-shrink: 0; }
.lb-name   { font-size: 1.05rem; font-weight: 700; color: var(--text-light); flex: 1; }
.lb-stat   { display: flex; flex-direction: column; align-items: center; min-width: 44px; }
.lb-stat strong { font-size: 1.1rem; color: var(--ocean); font-weight: 800; }
.lb-stat small  { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.lb-pct    { font-size: 0.85rem; color: var(--text-muted); min-width: 36px; text-align: right; }

.lb-loading { color: var(--text-muted); font-size: 0.9rem; text-align: center; padding: 20px; }