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

body {
    font-family: "Arial", sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    padding: 100px 0;
}

.container {
    background: #222;
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    text-align: center;
    max-width: 500px;
    width: 90%;
}

h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 15px;
}

.info-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.info-label {
    font-size: 0.9em;
    opacity: 0.8;
    margin-bottom: 5px;
}

.info-value {
    font-size: 1.5em;
    font-weight: bold;
}

#timer {
    color: #ffd700;
}

#current-number {
    color: #00ff7f;
}

#start-btn {
    background: linear-gradient(45deg, #ff6b6b, #ff8e8e);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.2em;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(255, 107, 107, 0.3);
    margin: 30px 0;
}

#start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(255, 107, 107, 0.4);
}

#game-board {
    display: none;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin: auto;
    max-width: 400px;
    width: 100%;
}

.block {
    position: relative;
    aspect-ratio: 1;
    min-height: 60px;
    border-radius: 12px;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
}

.block:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.layer {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2em;
    font-weight: bold;
    transition: all 0.5s ease;
    border-radius: 12px;
}

.front {
    background: linear-gradient(135deg, #74b9ff, #0984e3);
    color: white;
    z-index: 2;
}

.back {
    background: linear-gradient(135deg, #fd79a8, #e84393);
    color: white;
    opacity: 0;
    transform: rotateY(180deg);
}

.flip .front {
    opacity: 0;
    transform: rotateY(-180deg);
    transition: 0.5s;
}

.flip .back {
    opacity: 1;
    transform: rotateY(0deg);
    transform: 1s;
}

.completed {
    background: linear-gradient(135deg, #00b894, #00cec9) !important;
    transform: scale(0.9);
    pointer-events: none;
}

.completed .layer {
    background: linear-gradient(135deg, #00b894, #00cec9);
}

.shake {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%,
    100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-5px);
    }
    75% {
        transform: translateX(5px);
    }
}

.pulse {
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

#result {
    font-size: 1.5em;
    font-weight: bold;
    margin: 20px 0;
    opacity: 0;
    transition: opacity 0.5s ease;
}

#result.show {
    opacity: 1;
}

.buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 20px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

.btn-restart {
    background: linear-gradient(45deg, #55a3ff, #3742fa);
    color: white;
}

.btn-ranking {
    background: linear-gradient(45deg, #ffa502, #ff6348);
    color: white;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.ranking-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.ranking-content {
    background: white;
    color: #333;
    padding: 30px;
    border-radius: 20px;
    max-width: 400px;
    width: 90%;
    text-align: center;
}

.ranking-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.close-btn {
    background: #ff4757;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
    margin-top: 20px;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
    overflow: hidden;
    margin: 20px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(45deg, #00b894, #00cec9);
    width: 0%;
    transition: width 0.3s ease;
}

@media (max-width: 600px) {
    body {
        padding: 5% 0;
    }
    .container {
        margin: 20px;
        padding: 20px;
    }

    h1 {
        font-size: 2em;
    }

    .block {
        min-height: 50px;
    }
    .info-item {
        font-size: 12px;
    }
}