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

:root {
    /* Default Theme (Purple) */
    --bg-gradient-start: #667eea;
    --bg-gradient-end: #764ba2;
    --primary-color: #667eea;
    --primary-hover: #764ba2;
    --container-bg: #ffffff;
    --text-color: #333333;
    --text-secondary: #555555;
    --text-tertiary: #666666;
    --border-color: #e2e8f0;
    --surface-bg: #f7fafc;
    --pulse-active: #ff6b6b;
    --pulse-shadow: rgba(255, 107, 107, 0.6);
    --button-active: #667eea;
    --touch-area-bg: linear-gradient(145deg, #1a1a2e 0%, #16213e 100%);
}

body.theme-light {
    /* Light Theme (Olive/Yellow) */
    --bg-gradient-start: #97B22D;
    --bg-gradient-end: #89751B;
    --primary-color: #97B22D;
    --primary-hover: #89751B;
    --container-bg: #FEFCAD;
    --text-color: #2d3748;
    --text-secondary: #4a5568;
    --text-tertiary: #718096;
    --border-color: #E3DE81;
    --surface-bg: #f1ff72;
    --pulse-active: #89751B;
    --pulse-shadow: rgba(137, 117, 27, 0.6);
    --button-active: #97B22D;
    --touch-area-bg: linear-gradient(145deg, #3d4d1f 0%, #2a3a12 100%);
}

body.theme-dark {
    /* Dark Theme (Dark Olive) */
    --bg-gradient-start: #2d3d0f;
    --bg-gradient-end: #1a2208;
    --primary-color: #97B22D;
    --primary-hover: #E3DE81;
    --container-bg: #1f2d0a;
    --text-color: #E3DAB2;
    --text-secondary: #E3DE81;
    --text-tertiary: #97B22D;
    --border-color: #3d4d1f;
    --surface-bg: #2a3a12;
    --pulse-active: #E3DE81;
    --pulse-shadow: rgba(227, 222, 129, 0.6);
    --button-active: #97B22D;
    --touch-area-bg: linear-gradient(145deg, #1a2208 0%, #0f1505 100%);
}

body.theme-warm-light {
    /* Warm Light Theme */
    --bg-gradient-start: #C6BE28;
    --bg-gradient-end: #97B22D;
    --primary-color: #E49A32;
    --primary-hover: #C6BE28;
    --container-bg: #FEFCAD;
    --text-color: #3d3d1f;
    --text-secondary: #5d5d3f;
    --text-tertiary: #7d7d5f;
    --border-color: #E3DAB2;
    --surface-bg: #faedb6;
    --pulse-active: #E49A32;
    --pulse-shadow: rgba(228, 154, 50, 0.6);
    --button-active: #E49A32;
    --touch-area-bg: linear-gradient(145deg, #4a3f1a 0%, #3a3220 100%);
}

body.theme-warm-dark {
    /* Warm Dark Theme */
    --bg-gradient-start: #2a2510;
    --bg-gradient-end: #1a1808;
    --primary-color: #E49A32;
    --primary-hover: #C6BE28;
    --container-bg: #2d2815;
    --text-color: #FEFCAD;
    --text-secondary: #E3DAB2;
    --text-tertiary: #C6BE28;
    --border-color: #4a3f1a;
    --surface-bg: #3a3220;
    --pulse-active: #E49A32;
    --pulse-shadow: rgba(228, 154, 50, 0.6);
    --button-active: #E49A32;
    --touch-area-bg: linear-gradient(145deg, #1a1808 0%, #0f0d05 100%);
}

body.theme-red {
    /* Red Theme */
    --bg-gradient-start: #dc2626;
    --bg-gradient-end: #991b1b;
    --primary-color: #ef4444;
    --primary-hover: #dc2626;
    --container-bg: #ffffff;
    --text-color: #1f2937;
    --text-secondary: #374151;
    --text-tertiary: #4b5563;
    --border-color: #fecaca;
    --surface-bg: #fef2f2;
    --pulse-active: #b91c1c;
    --pulse-shadow: rgba(185, 28, 28, 0.6);
    --button-active: #ef4444;
    --touch-area-bg: linear-gradient(145deg, #450a0a 0%, #7f1d1d 100%);
}

body.theme-pink {
    /* Pink Theme */
    --bg-gradient-start: #ec4899;
    --bg-gradient-end: #be185d;
    --primary-color: #f472b6;
    --primary-hover: #ec4899;
    --container-bg: #ffffff;
    --text-color: #1f2937;
    --text-secondary: #374151;
    --text-tertiary: #4b5563;
    --border-color: #fbcfe8;
    --surface-bg: #fdf2f8;
    --pulse-active: #be185d;
    --pulse-shadow: rgba(190, 24, 93, 0.6);
    --button-active: #f472b6;
    --touch-area-bg: linear-gradient(145deg, #500724 0%, #831843 100%);
}

body.theme-red-dark {
    /* Dark Red Theme */
    --bg-gradient-start: #7f1d1d;
    --bg-gradient-end: #450a0a;
    --primary-color: #ef4444;
    --primary-hover: #f87171;
    --container-bg: #1a0505;
    --text-color: #fecaca;
    --text-secondary: #fca5a5;
    --text-tertiary: #f87171;
    --border-color: #7f1d1d;
    --surface-bg: #450a0a;
    --pulse-active: #f87171;
    --pulse-shadow: rgba(248, 113, 113, 0.6);
    --button-active: #ef4444;
    --touch-area-bg: linear-gradient(145deg, #1a0505 0%, #450a0a 100%);
}

body.theme-pink-dark {
    /* Dark Pink Theme */
    --bg-gradient-start: #831843;
    --bg-gradient-end: #500724;
    --primary-color: #f472b6;
    --primary-hover: #f9a8d4;
    --container-bg: #1a050f;
    --text-color: #fce7f3;
    --text-secondary: #fbcfe8;
    --text-tertiary: #f9a8d4;
    --border-color: #831843;
    --surface-bg: #500724;
    --pulse-active: #f9a8d4;
    --pulse-shadow: rgba(249, 168, 212, 0.6);
    --button-active: #f472b6;
    --touch-area-bg: linear-gradient(145deg, #1a050f 0%, #500724 100%);
}

body.theme-black {
    /* Black Theme */
    --bg-gradient-start: #1f2937;
    --bg-gradient-end: #111827;
    --primary-color: #6b7280;
    --primary-hover: #9ca3af;
    --container-bg: #0f172a;
    --text-color: #f3f4f6;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --border-color: #374151;
    --surface-bg: #1e293b;
    --pulse-active: #e5e7eb;
    --pulse-shadow: rgba(229, 231, 235, 0.6);
    --button-active: #6b7280;
    --touch-area-bg: linear-gradient(145deg, #0a0a0a 0%, #1f2937 100%);
}

body.theme-blue {
    /* Blue Theme */
    --bg-gradient-start: #3b82f6;
    --bg-gradient-end: #1e40af;
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --container-bg: #ffffff;
    --text-color: #1f2937;
    --text-secondary: #374151;
    --text-tertiary: #4b5563;
    --border-color: #bfdbfe;
    --surface-bg: #eff6ff;
    --pulse-active: #1e40af;
    --pulse-shadow: rgba(30, 64, 175, 0.6);
    --button-active: #60a5fa;
    --touch-area-bg: linear-gradient(145deg, #1e3a5f 0%, #1e40af 100%);
}

body.theme-blue-dark {
    /* Dark Blue Theme (Dark with Bright Blues) */
    --bg-gradient-start: #0c4a6e;
    --bg-gradient-end: #082f49;
    --primary-color: #38bdf8;
    --primary-hover: #0ea5e9;
    --container-bg: #0a1929;
    --text-color: #e0f2fe;
    --text-secondary: #7dd3fc;
    --text-tertiary: #38bdf8;
    --border-color: #0e7490;
    --surface-bg: #164e63;
    --pulse-active: #0ea5e9;
    --pulse-shadow: rgba(14, 165, 233, 0.6);
    --button-active: #38bdf8;
    --touch-area-bg: linear-gradient(145deg, #082f49 0%, #0c4a6e 100%);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, 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: 10px;
    transition: background 0.3s ease;
    touch-action: none;
    overflow: hidden;
}

.container {
    background: var(--container-bg);
    border-radius: 20px;
    padding: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 100%;
    height: calc(100vh - 20px);
    max-height: 800px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: background 0.3s ease;
}

/* Header Row */
.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    margin-bottom: 10px;
    flex-shrink: 0;
}

h1 {
    text-align: center;
    color: var(--text-color);
    font-size: 1.5em;
    flex: 1;
    transition: color 0.3s ease;
}

/* Theme Picker */
.theme-picker {
    position: relative;
    margin-right: 10px;
}

.theme-btn-active {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 3px solid var(--text-color);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.theme-btn-active:hover {
    transform: scale(1.1);
}

.theme-btn-active.theme-default {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.theme-btn-active.theme-light {
    background: linear-gradient(135deg, #97B22D 0%, #E3DE81 100%);
}

.theme-btn-active.theme-dark {
    background: linear-gradient(135deg, #2d3d0f 0%, #97B22D 100%);
}

.theme-btn-active.theme-warm-light {
    background: linear-gradient(135deg, #E49A32 0%, #FEFCAD 100%);
}

.theme-btn-active.theme-warm-dark {
    background: linear-gradient(135deg, #2a2510 0%, #E49A32 100%);
}

.theme-btn-active.theme-red {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
}

.theme-btn-active.theme-pink {
    background: linear-gradient(135deg, #ec4899 0%, #be185d 100%);
}

.theme-btn-active.theme-red-dark {
    background: linear-gradient(135deg, #7f1d1d 0%, #ef4444 100%);
}

.theme-btn-active.theme-pink-dark {
    background: linear-gradient(135deg, #831843 0%, #f472b6 100%);
}

.theme-btn-active.theme-black {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
}

.theme-btn-active.theme-blue {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

.theme-btn-active.theme-blue-dark {
    background: linear-gradient(135deg, #0c4a6e 0%, #38bdf8 100%);
}

.theme-dropdown {
    position: absolute;
    top: 40px;
    left: 0;
    background: var(--container-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 10px;
    display: none;
    grid-template-columns: 32px 32px;
    gap: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.theme-dropdown.visible {
    display: grid;
}

.theme-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-btn:hover {
    transform: scale(1.1);
    border-color: var(--primary-color);
}

.theme-btn.active {
    border: 3px solid var(--text-color);
    box-shadow: 0 0 0 2px var(--container-bg), 0 0 8px rgba(0, 0, 0, 0.3);
}

.theme-btn.theme-default {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.theme-btn.theme-light {
    background: linear-gradient(135deg, #97B22D 0%, #E3DE81 100%);
}

.theme-btn.theme-dark {
    background: linear-gradient(135deg, #2d3d0f 0%, #97B22D 100%);
}

.theme-btn.theme-warm-light {
    background: linear-gradient(135deg, #E49A32 0%, #FEFCAD 100%);
}

.theme-btn.theme-warm-dark {
    background: linear-gradient(135deg, #2a2510 0%, #E49A32 100%);
}

.theme-btn.theme-red {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
}

.theme-btn.theme-pink {
    background: linear-gradient(135deg, #ec4899 0%, #be185d 100%);
}

.theme-btn.theme-red-dark {
    background: linear-gradient(135deg, #7f1d1d 0%, #ef4444 100%);
}

.theme-btn.theme-pink-dark {
    background: linear-gradient(135deg, #831843 0%, #f472b6 100%);
}

.theme-btn.theme-black {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
}

.theme-btn.theme-blue {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

.theme-btn.theme-blue-dark {
    background: linear-gradient(135deg, #0c4a6e 0%, #38bdf8 100%);
}

/* Info Button */
.info-btn {
    background: none;
    border: none;
    font-size: 1.5em;
    color: var(--primary-color);
    cursor: pointer;
    padding: 5px;
    transition: color 0.3s;
}

.info-btn:hover {
    color: var(--primary-hover);
}

/* Effects Panel (Top Half) */
.effects-panel {
    flex-shrink: 0;
    padding: 10px 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.effects-row {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.effect-btn {
    flex: 1;
    max-width: 80px;
    aspect-ratio: 1;
    border: none;
    border-radius: 16px;
    background: var(--surface-bg);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border: 2px solid var(--border-color);
}

.effect-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.effect-btn:active {
    transform: scale(0.95);
}

.effect-btn.active {
    background: var(--button-active);
    border-color: var(--button-active);
    box-shadow: 0 4px 16px var(--pulse-shadow);
}

.effect-btn.active .effect-label {
    color: white;
}

.effect-icon {
    font-size: 1.5em;
}

.effect-label {
    font-size: 0.7em;
    font-weight: 600;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

/* Modifier Buttons */
.effects-row.modifiers {
    margin-top: 5px;
}

.modifier-btn {
    flex: 1;
    padding: 10px 8px;
    border: none;
    border-radius: 12px;
    background: var(--surface-bg);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    border: 2px solid var(--border-color);
}

.modifier-btn:hover {
    transform: translateY(-1px);
    border-color: var(--primary-color);
}

.modifier-btn:active {
    transform: scale(0.98);
}

.modifier-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.modifier-btn.active .modifier-label {
    color: white;
}

.modifier-label {
    font-size: 0.75em;
    font-weight: 600;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

/* Touch Area (Bottom Half) */
.touch-area {
    flex: 1;
    background: var(--touch-area-bg);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    touch-action: none;
    cursor: crosshair;
    min-height: 200px;
    box-shadow: inset 0 4px 20px rgba(0, 0, 0, 0.3);
}

.touch-instructions {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    pointer-events: none;
    z-index: 1;
}

.touch-instructions p {
    margin: 5px 0;
    font-size: 1em;
    font-weight: 500;
}

.touch-instructions .touch-hint {
    font-size: 0.75em;
    opacity: 0.7;
}

#touchCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.touch-feedback {
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 3;
    transition: opacity 0.1s ease;
}

.touch-feedback.active {
    opacity: 0.8;
    animation: pulse-feedback 0.3s ease-out;
}

@keyframes pulse-feedback {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

/* Info Modal */
.info-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.info-modal-content {
    background: var(--container-bg);
    border-radius: 15px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    transition: background 0.3s ease;
    overflow-y: auto;
}

.info-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 20px 15px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    transition: border-color 0.3s ease;
}

.info-modal-header h3 {
    margin: 0;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    color: var(--text-tertiary);
    padding: 0;
    line-height: 1;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: var(--text-color);
}

.info-modal-content h4 {
    color: var(--primary-color);
    margin-top: 15px;
    margin-bottom: 8px;
    font-size: 1.1em;
    transition: color 0.3s ease;
}

.info-modal-content h4:first-child {
    margin-top: 5px;
}

.info-modal-content p {
    margin: 8px 0;
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.9em;
    transition: color 0.3s ease;
}

.info-modal-content ul {
    list-style: none;
    padding: 0;
}

.info-modal-content li {
    margin: 10px 0;
    padding-left: 15px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.9em;
    transition: color 0.3s ease;
}

.info-modal-content li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    transition: color 0.3s ease;
}

/* Responsive Design */
@media (max-width: 400px) {
    .container {
        padding: 10px;
    }

    h1 {
        font-size: 1.2em;
    }

    .effect-btn {
        max-width: 65px;
        border-radius: 12px;
    }

    .effect-icon {
        font-size: 1.2em;
    }

    .effect-label {
        font-size: 0.6em;
    }

    .modifier-btn {
        padding: 8px 5px;
    }

    .modifier-label {
        font-size: 0.65em;
    }

    .touch-instructions p {
        font-size: 0.85em;
    }
}

@media (min-height: 700px) {
    .touch-area {
        min-height: 300px;
    }
}

@media (max-height: 600px) {
    .effects-panel {
        padding: 5px 0;
        gap: 5px;
    }
    
    .effect-btn {
        max-width: 60px;
    }
    
    .touch-area {
        min-height: 150px;
    }
}