:root {
    --ocean: #0a2647;
    --ocean-light: #144272;
    --accent: #ff8500;
    --hit: #e63946;
    --miss: #c9d6df;
    --ship: #2c3e50;
    --success: #2ecc71;
    --bg: #eef4fa;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: #1b1b1b;
}

.site-header {
    background: var(--ocean);
    color: white;
    text-align: center;
    padding: 1.25rem 1rem;
}

.site-header h1 {
    margin: 0;
    font-size: 2rem;
}

.tagline {
    margin: 0.25rem 0 0.75rem;
    opacity: 0.8;
    font-size: 0.9rem;
}

#stats-bar .stats-box {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 1.5rem;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.4rem 1rem;
    border-radius: 999px;
    display: inline-flex;
}

main#app {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.loading {
    text-align: center;
    padding: 3rem;
    font-size: 1.2rem;
    color: var(--ocean);
}

h2 {
    text-align: center;
    color: var(--ocean);
}

.fleet-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.ship-item {
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.9rem;
    background: white;
    border: 2px solid #ccc;
}

.ship-item.placed {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.ship-item.next {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 133, 0, 0.25);
    font-weight: bold;
}

.controls {
    text-align: center;
    margin-bottom: 1rem;
}

.controls button, .start-btn {
    background: var(--ocean-light);
    color: white;
    border: none;
    padding: 0.55rem 1.1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    margin: 0.25rem;
}

.controls button.secondary {
    background: #607d8b;
}

.controls button:hover, .start-btn:hover {
    filter: brightness(1.1);
}

.start-btn {
    display: block;
    margin: 1.5rem auto 0;
    background: var(--accent);
    font-size: 1.1rem;
    padding: 0.75rem 2rem;
}

.hint {
    text-align: center;
    color: #555;
    font-size: 0.9rem;
}

.boards-row {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    margin-top: 1rem;
}

.board-panel h3 {
    text-align: center;
    color: var(--ocean);
    margin-bottom: 0.5rem;
}

table.board {
    border-collapse: collapse;
    margin: 0 auto;
}

table.board th {
    color: #607d8b;
    font-size: 0.75rem;
    font-weight: normal;
    width: 32px;
    height: 24px;
}

table.board td.cell {
    width: 32px;
    height: 32px;
    border: 1px solid #a9c6e0;
    background: #d6e9f8;
}

table.board td.cell.water {
    background: #d6e9f8;
}

table.board td.cell.ship {
    background: var(--ship);
}

table.board td.cell.hit {
    background: var(--hit);
    position: relative;
}

table.board td.cell.hit::after {
    content: "\2716";
    color: white;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

table.board td.cell.miss {
    background: var(--miss);
    position: relative;
}

table.board td.cell.miss::after {
    content: "\2022";
    color: #607d8b;
    display: flex;
    align-items: center;
    justify-content: center;
}

table.board td.cell.sunk {
    background: #4a0e0e !important;
    border-color: #2a0808;
}

table.board td.cell.sunk::after {
    content: "\2620";
    color: #ffb3b3 !important;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

table.board td.cell.clickable {
    cursor: crosshair;
    transition: background 0.15s;
}

table.board td.cell.clickable:hover {
    background: #ffd899;
}

.status-banner {
    text-align: center;
    margin-bottom: 0.5rem;
    min-height: 1.5rem;
}

.status-banner.over h2 {
    color: var(--accent);
}

.error-banner {
    background: #ffe0e0;
    color: #a3231b;
    border: 1px solid #f5b5b0;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    text-align: center;
    margin: 0 auto 1rem;
    max-width: 500px;
}

.menu-screen, .waiting-room {
    text-align: center;
    max-width: 480px;
    margin: 0 auto;
    background: white;
    padding: 2rem 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(10, 38, 71, 0.08);
}

.menu-section {
    margin: 1rem 0;
}

.menu-divider {
    color: #90a4ae;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 1.5rem 0 1rem;
    position: relative;
}

.human-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
}

.join-form {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.join-form input {
    padding: 0.5rem 0.75rem;
    border: 2px solid #cfd8dc;
    border-radius: 6px;
    font-size: 1rem;
    text-transform: uppercase;
    width: 140px;
    text-align: center;
    letter-spacing: 0.1em;
}

.controls-btn {
    background: var(--ocean-light);
    color: white;
    border: none;
    padding: 0.55rem 1.1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
}

.controls-btn.secondary {
    background: #607d8b;
}

.controls-btn:hover {
    filter: brightness(1.1);
}

.access-code {
    font-size: 2.2rem;
    font-weight: bold;
    letter-spacing: 0.25em;
    color: var(--ocean);
    background: #eef4fa;
    border: 2px dashed var(--ocean-light);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin: 1rem 0;
}

.waiting-room .hint {
    margin-top: 1rem;
}

.rules-form {
    background: #f4f8fb;
    border: 1px solid #d5e3f0;
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0 1.5rem;
    text-align: left;
}

.rules-form h3 {
    margin: 0 0 0.75rem;
    font-size: 0.95rem;
    color: var(--ocean);
    text-align: center;
}

.rule-field {
    display: block;
    font-size: 0.85rem;
    color: #37474f;
    margin-bottom: 0.6rem;
}

.rule-field input[type="text"] {
    width: 100%;
    margin-top: 0.3rem;
    padding: 0.4rem 0.6rem;
    border: 2px solid #cfd8dc;
    border-radius: 6px;
    font-size: 0.95rem;
}

.rule-checkbox {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: #37474f;
}

.hint.small {
    font-size: 0.78rem;
    color: #78909c;
    margin: 0.4rem 0 0;
}

.site-footer {
    text-align: center;
    color: #607d8b;
    font-size: 0.8rem;
    padding: 1.5rem;
}

@media (max-width: 720px) {
    table.board td.cell, table.board th {
        width: 24px;
        height: 24px;
    }
}