:root {
    --bg-color: #0b0e14;
    --card-bg: #1a1f2c;
    --accent-color: #00d2ff;
    --text-primary: #e0e6ed;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --grid-color: rgba(255, 255, 255, 0.05);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    overscroll-behavior: none;
    /* Pull-to-refresh engellemek için */
}

#mute-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.icon-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(0, 210, 255, 0.1);
}

.icon-btn:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.3);
    color: var(--accent-color);
    transform: scale(1.1);
}

.icon-btn i {
    width: 20px;
    height: 20px;
}

#game-container {
    max-width: 900px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

header h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    text-align: center;
    letter-spacing: 4px;
    margin-bottom: 10px;
}

.accent {
    color: var(--accent-color);
    text-shadow: 0 0 10px rgba(0, 210, 255, 0.5);
}

.main-layout {
    display: flex;
    gap: 30px;
    justify-content: center;
    align-items: flex-start;
}

.canvas-wrapper {
    background: var(--card-bg);
    padding: 10px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border: 2px solid var(--border-color);
    position: relative;
}

#tetris {
    display: block;
    background: #000;
    border-radius: 4px;
}

#ui-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
    flex: 0 0 250px;
}

.stat-card,
.controls-guide {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

#player-list {
    list-style: none;
}

.player-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.color-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.controls-guide ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.key {
    background: #1e293b;
    border: 1px solid #475569;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: monospace;
    color: var(--accent-color);
    font-weight: bold;
}

.hidden {
    display: none !important;
}

/* Lobi Overlay */
#lobby-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 14, 20, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.lobby-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 25px;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lobby-card h2 {
    font-family: 'Orbitron', sans-serif;
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.input-group label,
.color-picker-group label {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

#nickname {
    background: #0b0e14;
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

#nickname:focus {
    border-color: var(--accent-color);
}

#color-options {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.color-opt {
    width: 30px;
    height: 30px;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 2px solid transparent;
}

.color-opt:hover {
    transform: scale(1.1);
}

.color-opt.disabled {
    opacity: 0.2;
    cursor: not-allowed;
    pointer-events: none;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.host-tag {
    color: #ffd700;
    font-weight: bold;
    margin-left: 5px;
    text-shadow: 0 0 5px rgba(255, 215, 0, 0.5);
}

.color-opt.active {
    border-color: #fff;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
    transform: scale(1.1);
}

#host-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border: 1px dashed var(--border-color);
}

.size-picker {
    display: flex;
    gap: 15px;
    font-size: 0.9rem;
}

.size-picker label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

#join-btn {
    background: linear-gradient(135deg, var(--accent-color), #0080ff);
    color: #fff;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-family: 'Orbitron', sans-serif;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

#join-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 210, 255, 0.3);
}

.lobby-footer {
    text-align: center;
    margin-top: -10px;
}

.lobby-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    transition: color 0.3s;
}

.lobby-footer a:hover {
    color: var(--accent-color);
}

@media (max-width: 768px) {
    .main-layout {
        flex-direction: column;
        align-items: center;
    }
}