:root {
    --bg-gradient-start: #e3f2fd;
    --bg-gradient-end: #e1f5fe;
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    --primary-color: #1976D2;
    --primary-light: rgba(25, 118, 210, 0.15);
    --primary-hover: #1565C0;
    --text-color: #333;
    --text-light: #666;
    --input-bg: rgba(255, 255, 255, 0.6);
    --link-btn-bg: rgba(255, 255, 255, 0.5);
}

.theme-blue {
    --bg-gradient-start: #e3f2fd;
    --bg-gradient-end: #e1f5fe;
    --primary-color: #1976D2;
    --primary-light: rgba(25, 118, 210, 0.15);
    --primary-hover: #1565C0;
}

.theme-purple {
    --bg-gradient-start: #e8eaf6;
    --bg-gradient-end: #f3e5f5;
    --primary-color: #7E57C2;
    --primary-light: rgba(126, 87, 194, 0.15);
    --primary-hover: #6A4BBF;
}

.theme-green {
    --bg-gradient-start: #e8f5e9;
    --bg-gradient-end: #e0f7fa;
    --primary-color: #388E3C;
    --primary-light: rgba(56, 142, 60, 0.15);
    --primary-hover: #2E7D32;
}

.theme-dark-blue {
    --bg-gradient-start: #0d1b2a;
    --bg-gradient-end: #1b263b;
    --glass-bg: rgba(20, 30, 48, 0.8);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: rgba(0, 0, 0, 0.3);
    --primary-color: #64b5f6;
    --primary-light: rgba(100, 181, 246, 0.2);
    --primary-hover: #42a5f5;
    --text-color: #e0e0e0;
    --text-light: #a0a0a0;
    --input-bg: rgba(255, 255, 255, 0.1);
    --link-btn-bg: rgba(255, 255, 255, 0.1);
}

.theme-dark-purple {
    --bg-gradient-start: #1a1a2e;
    --bg-gradient-end: #16213e;
    --glass-bg: rgba(30, 30, 50, 0.8);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: rgba(0, 0, 0, 0.3);
    --primary-color: #bb86fc;
    --primary-light: rgba(187, 134, 252, 0.2);
    --primary-hover: #9a67ea;
    --text-color: #e0e0e0;
    --text-light: #a0a0a0;
    --input-bg: rgba(255, 255, 255, 0.1);
    --link-btn-bg: rgba(255, 255, 255, 0.1);
}

.theme-dark-green {
    --bg-gradient-start: #1b2a1b;
    --bg-gradient-end: #2d3b2d;
    --glass-bg: rgba(35, 50, 35, 0.8);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: rgba(0, 0, 0, 0.3);
    --primary-color: #81c784;
    --primary-light: rgba(129, 199, 132, 0.2);
    --primary-hover: #66bb6a;
    --text-color: #e0e0e0;
    --text-light: #a0a0a0;
    --input-bg: rgba(255, 255, 255, 0.1);
    --link-btn-bg: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: background 0.3s ease;
}

.color-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 8px;
    box-shadow: 0 8px 24px var(--glass-shadow);
    display: flex;
    gap: 8px;
    overflow: hidden;
    width: 48px;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.color-switcher:hover {
    width: 260px;
}

.color-btn {
    width: 32px;
    height: 32px;
    border-radius: 12px;
    border: 2px solid var(--glass-border);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
}

.color-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.color-btn.selected {
    transform: scale(1.15);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.color-btn.blue { background: linear-gradient(135deg, #e3f2fd, #e1f5fe); border-color: #1976D2; }
.color-btn.purple { background: linear-gradient(135deg, #e8eaf6, #f3e5f5); border-color: #7E57C2; }
.color-btn.green { background: linear-gradient(135deg, #e8f5e9, #e0f7fa); border-color: #388E3C; }
.color-btn.dark-blue { background: linear-gradient(135deg, #0d1b2a, #1b263b); border-color: #64b5f6; }
.color-btn.dark-purple { background: linear-gradient(135deg, #1a1a2e, #16213e); border-color: #bb86fc; }
.color-btn.dark-green { background: linear-gradient(135deg, #1b2a1b, #2d3b2d); border-color: #81c784; }

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 25px 50px var(--glass-shadow),
                0 0 0 1px rgba(255, 255, 255, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
    max-width: 600px;
    width: 100%;
    text-align: center;
}

.level-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.level-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.level-description {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.6;
}

.level-content {
    margin-bottom: 30px;
}

.answer-section {
    display: flex;
    gap: 12px;
}

.btn {
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
    flex-shrink: 0;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 14px var(--primary-light);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--primary-light);
}

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

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-light);
}

input[type="text"], input[type="password"] {
    flex: 1;
    padding: 14px 18px;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    font-size: 14px;
    color: var(--text-color);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus, input[type="password"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

input[type="text"]::placeholder, input[type="password"]::placeholder {
    color: var(--text-light);
    opacity: 0.7;
}

.notification {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px 24px;
    box-shadow: 0 8px 24px var(--glass-shadow);
    font-size: 14px;
    font-weight: 500;
    z-index: 1000;
    animation: slideDown 0.3s ease;
}

.notification.success {
    color: #10b981;
    border-color: rgba(16, 185, 129, 0.3);
}

.notification.error {
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.3);
}

.notification.info {
    color: var(--text-color);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.image-container {
    margin-bottom: 20px;
    position: relative;
    display: flex;
    justify-content: center;
}

.image-container img {
    max-width: 370px;
    max-height: 200px;
    border-radius: 8px;
    box-shadow: 0 8px 24px var(--glass-shadow);
}

.clickable-area {
    position: absolute;
    cursor: pointer;
    transition: all 0.2s ease;
}

.clickable-area:hover {
    opacity: 0.7;
}

.hint-text {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 10px;
    font-style: italic;
}

.canvas-container {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.canvas-container canvas {
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--glass-shadow);
}

.hotspot-area {
    position: absolute;
    border: 2px dashed var(--primary-color);
    border-radius: 12px;
    opacity: 0.5;
    cursor: pointer;
    transition: all 0.2s ease;
}

.hotspot-area:hover {
    opacity: 1;
    background: var(--primary-light);
}

.synth-table {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    max-width: 300px;
    margin: 0 auto;
    margin-bottom: 20px;
}

.synth-cell {
    aspect-ratio: 1;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--text-color);
}

.synth-cell.result {
    grid-column: span 3;
    aspect-ratio: auto;
    padding: 12px;
    font-weight: 600;
}

.material-selector {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 20px;
}

.material-btn {
    padding: 12px 20px;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-color);
    font-size: 14px;
}

.material-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateY(-2px);
}

.material-btn.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.beacon-glow {
    animation: glow 1.5s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px var(--primary-light);
    }
    50% {
        box-shadow: 0 0 40px var(--primary-color), 0 0 60px var(--primary-light);
    }
}

.maze-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    max-width: 300px;
    margin: 0 auto;
    margin-bottom: 20px;
}

.maze-node {
    aspect-ratio: 1;
    background: var(--input-bg);
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.maze-node:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.maze-node.visited {
    background: var(--primary-color);
    color: white;
}

.maze-node.current {
    background: var(--primary-light);
    border-color: var(--primary-color);
    animation: pulse 1s ease-in-out infinite;
}

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

.game-maze {
    position: relative;
    width: 300px;
    height: 300px;
    border: 2px solid var(--primary-color);
    border-radius: 16px;
    margin: 0 auto;
    margin-bottom: 20px;
}

.maze-wall {
    position: absolute;
    background: var(--primary-color);
}

.maze-player {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    transition: all 0.2s ease;
    box-shadow: 0 0 10px var(--primary-light);
}

.maze-goal {
    position: absolute;
    width: 20px;
    height: 20px;
    background: #10b981;
    border-radius: 50%;
    animation: goalGlow 1s ease-in-out infinite;
}

@keyframes goalGlow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(16, 185, 129, 0.8);
    }
}

.soul-sand-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 200px;
    margin: 0 auto;
    margin-bottom: 20px;
}

.soul-sand-item {
    aspect-ratio: 1;
    background: #8B4513;
    border: 2px solid #654321;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: #D2691E;
}

.soul-sand-item:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
}

.soul-sand-item.selected {
    background: var(--primary-color);
    border-color: white;
    color: white;
}

.portals-container {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 20px;
}

.portal-frame {
    width: 80px;
    height: 100px;
    border: 3px solid #4A4A4A;
    border-radius: 8px;
    background: linear-gradient(180deg, #2A2A2A 0%, #1A1A1A 100%);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.portal-frame:hover {
    transform: scale(1.05);
    border-color: #9932CC;
}

.portal-frame.active {
    border-color: #9932CC;
    box-shadow: 0 0 20px rgba(153, 50, 204, 0.5);
}

.portal-eye {
    width: 20px;
    height: 20px;
    background: #9932CC;
    border-radius: 50%;
    display: none;
}

.portal-frame.active .portal-eye {
    display: block;
    animation: eyeGlow 1s ease-in-out infinite;
}

@keyframes eyeGlow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(153, 50, 204, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(153, 50, 204, 0.8);
    }
}

.bad-ending {
    text-align: center;
}

.bad-ending h1 {
    font-size: 48px;
    font-weight: 800;
    color: #ef4444;
    margin-bottom: 20px;
    animation: shake 0.5s ease-in-out infinite;
}

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

.bad-ending p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 30px;
}

.reward-code {
    background: var(--input-bg);
    border: 2px dashed var(--primary-color);
    border-radius: 12px;
    padding: 20px;
    font-family: 'Courier New', monospace;
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: 2px;
    margin-bottom: 20px;
    animation: rewardPulse 2s ease-in-out infinite;
}

@keyframes rewardPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(25, 118, 210, 0.4);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(25, 118, 210, 0);
    }
}

@media (max-width: 640px) {
    .glass-card {
        padding: 24px;
    }
    
    .level-title {
        font-size: 24px;
    }
    
    .level-description {
        font-size: 14px;
    }
    
    .answer-section {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .synth-table {
        max-width: 250px;
    }
    
    .maze-container {
        max-width: 250px;
    }
    
    .game-maze {
        width: 250px;
        height: 250px;
    }
}