/* Tetris Game Styles */

body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333333;
}

header {
    text-align: center;
    padding: 2rem 1rem;
    background: rgba(26, 26, 26, 0.8);
    color: white;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
}

header p {
    margin: 0.5rem 0 0;
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
}

nav {
    background: rgba(26, 26, 26, 0.9);
    padding: 1rem;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.3s ease;
}

nav ul li a:hover {
    background: rgba(255, 255, 255, 0.1);
}

main {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 300px);
    padding: 2rem 1rem;
}

.game-container {
    display: flex;
    gap: 2rem;
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

canvas {
    border: 2px solid #333333;
    display: block;
    background: white;
}

.ui-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-width: 200px;
}

.ui-panel > div {
    background: #f5f5f5;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.ui-panel h3 {
    margin: 0 0 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: #667eea;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
}

.ui-panel p {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: #333333;
}

.next-piece-display canvas,
.hold-piece-display canvas {
    background: white;
    border: 1px solid #e0e0e0;
    margin-top: 0.5rem;
}

/* Mobile controls */
.game-and-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f5f5f5;
    border-radius: 8px;
}

.dpad-container {
    display: grid;
    grid-template-rows: auto auto;
    gap: 0.25rem;
    justify-items: center;
}

.dpad-middle {
    display: grid;
    grid-template-columns: auto auto auto;
    gap: 0.25rem;
}

.dpad-btn {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
    border: 2px solid #667eea;
    background: white;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.1s ease;
    color: #667eea;
    font-weight: bold;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.dpad-btn:hover {
    background: #667eea;
    color: white;
}

.dpad-btn:active {
    transform: scale(0.95);
    background: #5568d3;
    color: white;
}

.hold-btn {
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: bold;
    border: 2px solid #764ba2;
    background: white;
    color: #764ba2;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.1s ease;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.hold-btn:hover {
    background: #764ba2;
    color: white;
}

.hold-btn:active {
    transform: scale(0.95);
    background: #653a8a;
    color: white;
}

/* Tooltip */
.hold-piece-display h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #667eea;
    color: white;
    font-size: 0.75rem;
    font-weight: bold;
    cursor: help;
}

.tooltip {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: #333;
    color: white;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: normal;
    text-transform: none;
    letter-spacing: normal;
    line-height: 1.4;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.tooltip-icon:hover + .tooltip,
.tooltip-icon:focus + .tooltip,
.tooltip:hover {
    display: block;
}

footer {
    text-align: center;
    padding: 1rem;
    background: rgba(26, 26, 26, 0.9);
    color: white;
    margin-top: 2rem;
}

footer p {
    margin: 0;
    font-size: 0.9rem;
}

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

    .ui-panel {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        min-width: auto;
    }

    .ui-panel > div {
        flex: 1 1 calc(50% - 0.75rem);
        min-width: 150px;
    }

    canvas#tetris-game {
        width: 100%;
        max-width: 320px;
        height: auto;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8rem;
    }

    header p {
        font-size: 1rem;
    }

    .game-container {
        padding: 1rem;
    }

    .ui-panel > div {
        flex: 1 1 100%;
    }
}