/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0d1f1a 0%, #1a3a2e 50%, #1e4d3a 100%);
    min-height: 100vh;
    color: #ffffff;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Main Content Layout */
.main-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    justify-content: center;
    gap: 20px;
}

/* Timer Display */
.timer-display {
    background: linear-gradient(135deg, #1e3a30 0%, #2d4a3e 100%);
    padding: 15px 30px;
    border-radius: 12px;
    border: 2px solid #3d9970;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    text-align: center;
}

.timer-label {
    font-size: 0.9rem;
    color: #a8d5ba;
    margin-bottom: 5px;
}

.timer-value {
    font-size: 2rem;
    font-weight: bold;
    color: #3d9970;
    font-family: 'Courier New', monospace;
}

/* Game Container */
.game-container {
    width: 90vw;
    max-width: 900px;
    background: #1a2e26;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    border: 2px solid #2d4a3e;
}

/* Memory Grid */
.memory-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(5, 1fr);
    gap: 12px;
    max-width: 720px;
    margin: 0 auto;
}

/* Memory Card */
.memory-card {
    aspect-ratio: 1;
    background: linear-gradient(135deg, #1e3a30 0%, #2d4a3e 100%);
    border: 3px solid #2d4a3e;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.memory-card::before {
    content: '?';
    position: absolute;
    font-size: 3rem;
    color: #3d9970;
    font-weight: bold;
}

.memory-card.selected {
    border-color: #3d9970;
    box-shadow: 0 0 20px rgba(61, 153, 112, 0.6);
    transform: scale(1.05);
}

.memory-card.flipped {
    background: linear-gradient(135deg, #3d9970 0%, #2d7a56 100%);
    border-color: #52b788;
}

.memory-card.flipped::before {
    content: '';
}

.memory-card.matched {
    background: linear-gradient(135deg, #52b788 0%, #40916c 100%);
    border-color: #74c69d;
    animation: match-pulse 0.6s ease-in-out;
}

.memory-card.matched::before {
    content: '';
}

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

.card-icon {
    font-size: 3rem;
    display: none;
}

.memory-card.flipped .card-icon,
.memory-card.matched .card-icon {
    display: block;
}

@keyframes match-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* Controls */
.controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.control-btn {
    padding: 12px 25px;
    border: 2px solid #3d9970;
    border-radius: 20px;
    background: linear-gradient(45deg, #3d9970, #2d7a56);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.control-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(61, 153, 112, 0.4);
    border-color: #52b788;
}

.control-btn:active {
    transform: translateY(0);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.game-status {
    font-size: 0.9rem;
    color: #a8d5ba;
    font-weight: 500;
}

/* Mission Box */
.mission-box {
    display: flex;
    align-items: center;
    gap: 15px;
    background: linear-gradient(135deg, #1e3a30 0%, #2d4a3e 100%);
    padding: 15px 25px;
    border-radius: 12px;
    border: 2px solid #3d9970;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    max-width: 600px;
    margin: 0 auto;
}

/* Byte Companion */
.byte-companion {
    position: relative;
}

.byte-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3d9970, #2d7a56);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid #52b788;
    box-shadow: 0 4px 12px rgba(61, 153, 112, 0.3);
    transition: all 0.5s ease;
}

.byte-character {
    width: 3rem;
    height: 3rem;
    object-fit: contain;
    transition: all 0.3s ease;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

/* Byte Happy State */
.byte-companion.happy .byte-circle {
    background: linear-gradient(135deg, #52b788, #40916c);
    border-color: #74c69d;
    box-shadow: 0 4px 15px rgba(82, 183, 136, 0.5);
    animation: byte-bounce 0.6s ease-in-out;
}

.byte-companion.happy .byte-character {
    transform: scale(1.2);
}

@keyframes byte-bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.mission-text h3 {
    margin: 0;
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 600;
}

.mission-text p {
    margin: 2px 0 0 0;
    color: #a8d5ba;
    font-size: 0.9rem;
    line-height: 1.3;
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: linear-gradient(135deg, #1e3a30 0%, #2d4a3e 100%);
    padding: 40px 60px;
    border-radius: 20px;
    border: 3px solid #3d9970;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    text-align: center;
}

.modal-content h2 {
    color: #ffffff;
    font-size: 2rem;
    margin-bottom: 20px;
}

.modal-timer {
    margin-top: 20px;
}

.modal-timer-value {
    font-size: 4rem;
    font-weight: bold;
    color: #3d9970;
    font-family: 'Courier New', monospace;
    margin-bottom: 10px;
}

.modal-timer-text {
    font-size: 1.2rem;
    color: #a8d5ba;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .game-container {
        width: 95vw;
    }
    
    .memory-grid {
        gap: 10px;
    }
    
    .memory-card {
        font-size: 2rem;
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .game-container {
        width: 98vw;
        padding: 20px;
    }
    
    .memory-grid {
        gap: 8px;
    }
    
    .memory-card {
        font-size: 2rem;
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
    
    .mission-box {
        flex-direction: column;
        text-align: center;
        gap: 10px;
        padding: 12px 20px;
        max-width: 90vw;
    }
    
    .mission-text h3 {
        font-size: 1rem;
    }
    
    .mission-text p {
        font-size: 0.8rem;
    }
    
    .controls {
        flex-direction: column;
        gap: 10px;
    }
    
    .timer-value {
        font-size: 1.5rem;
    }
    
    .modal-content {
        padding: 30px 40px;
    }
    
    .modal-content h2 {
        font-size: 1.5rem;
    }
    
    .modal-timer-value {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .memory-grid {
        gap: 5px;
    }
    
    .memory-card {
        font-size: 1.5rem;
        border-width: 2px;
    }
    
    .card-icon {
        font-size: 1.8rem;
    }
}