* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: #e8eefc;
    background:
        radial-gradient(circle at top, #1f3b73 0%, transparent 45%),
        linear-gradient(160deg, #0b1020 0%, #111827 55%, #0a0f1a 100%);
}

.layout {
    max-width: 1180px;
    margin: 0 auto;
    padding: 24px;
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 24px;
}

.header {
    grid-column: 1 / -1;
}

.header h1 {
    font-size: 2rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.subtitle {
    margin-top: 6px;
    color: #9fb3d9;
}

.game-area {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

#gameCanvas {
    display: block;
    width: 100%;
    background: #05070f;
}

.overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(5, 7, 15, 0.72);
    backdrop-filter: blur(4px);
}

.overlay.hidden {
    display: none;
}

.overlay-card {
    width: min(90%, 360px);
    padding: 28px;
    border-radius: 16px;
    text-align: center;
    background: rgba(17, 24, 39, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.overlay-card h2 {
    margin-bottom: 10px;
}

.overlay-card p {
    margin-bottom: 18px;
    color: #b8c7e6;
    line-height: 1.5;
}

.overlay-card button {
    border: none;
    border-radius: 999px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    color: #08111f;
    background: linear-gradient(135deg, #7dd3fc, #38bdf8);
}

.overlay-card button:hover {
    filter: brightness(1.05);
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.panel {
    padding: 18px;
    border-radius: 16px;
    background: rgba(17, 24, 39, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.panel h2 {
    margin-bottom: 12px;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #93c5fd;
}

.panel ul {
    list-style: none;
    line-height: 1.8;
    color: #c7d5ef;
}

kbd {
    display: inline-block;
    min-width: 1.6rem;
    padding: 2px 6px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.06);
    font-size: 0.85rem;
    text-align: center;
}

.score-list {
    padding-left: 20px;
    line-height: 1.8;
    color: #dbeafe;
}

.score-list li.empty {
    list-style: none;
    margin-left: -20px;
    color: #94a3b8;
}

.lobby,
.waiting-room {
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #05070f;
}

.lobby-card {
    width: min(92%, 420px);
    padding: 28px;
    border-radius: 16px;
    background: rgba(17, 24, 39, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.lobby-card-wide {
    width: min(92%, 760px);
}

.lobby-card h2 {
    margin-bottom: 10px;
}

.mode-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 18px;
}

.mode-card {
    display: grid;
    gap: 8px;
    padding: 18px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: #e8eefc;
    text-align: left;
    cursor: pointer;
}

.mode-card strong {
    font-size: 1.05rem;
}

.mode-card span {
    color: #b8c7e6;
    line-height: 1.4;
    font-size: 0.92rem;
}

.mode-card:hover {
    border-color: rgba(125, 211, 252, 0.55);
    background: rgba(125, 211, 252, 0.08);
}

.text-button {
    border: none;
    background: none;
    color: #93c5fd;
    cursor: pointer;
    margin-bottom: 12px;
    padding: 0;
    font-size: 0.95rem;
}

.speed-options {
    display: grid;
    gap: 8px;
}

.speed-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
}

.speed-option input {
    accent-color: #38bdf8;
}

.field-hint,
.room-settings {
    color: #94a3b8;
    font-size: 0.9rem;
    line-height: 1.5;
}

.room-settings {
    margin-top: 8px;
}

.quick-join {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.quick-join h3 {
    margin-bottom: 8px;
    font-size: 1rem;
    color: #93c5fd;
}

.field-compact {
    margin: 14px 0;
}

.lobby-hint,
.lobby-status,
.session-info {
    color: #b8c7e6;
    line-height: 1.5;
}

.lobby-status.error {
    color: #fca5a5;
}

.field {
    display: grid;
    gap: 8px;
    margin: 18px 0;
}

.field span {
    color: #93c5fd;
    font-size: 0.9rem;
}

.field input,
.join-row input {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.05);
    color: #e8eefc;
    font-size: 1rem;
}

.lobby-actions {
    display: grid;
    gap: 12px;
}

.lobby-actions button,
.launch-button {
    border: none;
    border-radius: 999px;
    padding: 12px 20px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    color: #08111f;
    background: linear-gradient(135deg, #7dd3fc, #38bdf8);
}

.join-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.players-list {
    list-style: none;
    margin-top: 16px;
    line-height: 1.8;
    color: #dbeafe;
}

.countdown-label {
    margin-top: 16px;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fde68a;
}

.hidden {
    display: none !important;
}

.launch-button {
    width: 100%;
    margin-top: 14px;
}

.launch-button.hidden {
    display: none !important;
}

.surrender-button {
    width: 100%;
    margin-top: 10px;
    border: 1px solid rgba(248, 113, 113, 0.45);
    border-radius: 999px;
    padding: 11px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    color: #fecaca;
    background: rgba(127, 29, 29, 0.35);
}

.surrender-button:hover {
    background: rgba(153, 27, 27, 0.5);
}

.surrender-button.hidden {
    display: none !important;
}

@media (max-width: 980px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .mode-grid {
        grid-template-columns: 1fr;
    }
}