* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: linear-gradient(135deg, rgba(240,240,245,0.4) 0%, rgba(255,255,255,0.4) 100%);
}

body.dark-theme {
    background-color: #121212;
    color: #e0e0e0;
    background-image: linear-gradient(135deg, rgba(25,25,30,0.4) 0%, rgba(40,40,45,0.4) 100%);
}

body.ocean-blue-theme {
    background-color: #004a7c;
    color: #e0e0e0;
    background-image: linear-gradient(135deg, rgba(0,65,110,0.4) 0%, rgba(0,85,145,0.4) 100%);
}

body.purple-theme {
    background-color: #3c096c;
    color: #e0e0e0;
    background-image: linear-gradient(135deg, rgba(50,10,95,0.4) 0%, rgba(75,15,115,0.4) 100%);
}

.container {
    max-width: 1100px;
    margin: 30px auto;
    padding: 35px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease-in-out;
    position: relative;
    overflow: hidden;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #4361ee, #7400b8);
}

.dark-theme .container {
    background: #1e1e1e;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

.dark-theme .container::before {
    background: linear-gradient(90deg, #738adb, #9d4edd);
}

.ocean-blue-theme .container {
    background: #003559;
    box-shadow: 0 20px 50px rgba(0, 10, 30, 0.25);
}

.ocean-blue-theme .container::before {
    background: linear-gradient(90deg, #0096c7, #48cae4);
}

.purple-theme .container {
    background: #240046;
    box-shadow: 0 20px 50px rgba(60, 9, 108, 0.25);
}

.purple-theme .container::before {
    background: linear-gradient(90deg, #9d4edd, #c77dff);
}

.header {
    display: flex;
    align-items: center;
    margin-bottom: 35px;
    gap: 20px;
    justify-content: space-between;
}

.header > div:first-of-type {
    flex: 1;
}

.points-counter {
    display: flex;
    align-items: center;
    padding: 10px 20px;
    background: #f1f5ff;
    border-radius: 50px;
    box-shadow: 0 3px 15px rgba(67, 97, 238, 0.15);
    transition: all 0.3s ease;
    transform: translateY(0);
}

.points-counter:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(67, 97, 238, 0.2);
}

.dark-theme .points-counter {
    background: rgba(255, 255, 255, 0.08);
}

.ocean-blue-theme .points-counter {
    background: rgba(76, 201, 240, 0.08);
}

.purple-theme .points-counter {
    background: rgba(181, 23, 158, 0.08);
}

.total-points {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: bold;
    font-size: 20px;
}

.points-label {
    font-size: 16px;
    color: #6c757d;
    font-weight: normal;
}

.dark-theme .points-label, 
.ocean-blue-theme .points-label, 
.purple-theme .points-label {
    color: #cccccc;
}

.total-points i {
    color: #ffb703;
    font-size: 22px;
    filter: drop-shadow(0 3px 5px rgba(255, 183, 3, 0.3));
}

#totalPointsCounter {
    color: #4361ee;
    font-family: 'Luckiest Guy', cursive;
    font-size: 24px;
    text-shadow: 0 1px 3px rgba(67, 97, 238, 0.2);
}

.dark-theme #totalPointsCounter {
    color: #738adb;
}

.ocean-blue-theme #totalPointsCounter {
    color: #4cc9f0;
}

.purple-theme #totalPointsCounter {
    color: #b5179e;
}

.theme-controls {
    margin-left: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
}

h1 {
    color: #4361ee;
    margin-bottom: 8px;
    font-weight: 700;
    font-family: 'Luckiest Guy', cursive;
    letter-spacing: 1px;
    font-size: 2.5rem;
    text-shadow: 0 2px 4px rgba(67, 97, 238, 0.15);
}

h2, h3 {
    color: #4361ee;
    margin-bottom: 15px;
    font-family: 'Luckiest Guy', cursive;
    letter-spacing: 0.5px;
}

.dark-theme h1, .dark-theme h2, .dark-theme h3 {
    color: #738adb;
    text-shadow: 0 2px 4px rgba(115, 138, 219, 0.2);
}

.ocean-blue-theme h1, .ocean-blue-theme h2, .ocean-blue-theme h3 {
    color: #4cc9f0;
    text-shadow: 0 2px 4px rgba(76, 201, 240, 0.2);
}

.purple-theme h1, .purple-theme h2, .purple-theme h3 {
    color: #b5179e;
    text-shadow: 0 2px 4px rgba(181, 23, 158, 0.2);
}

.subtitle {
    color: #6c757d;
    font-size: 1.1rem;
    font-weight: 400;
    opacity: 0.85;
}

.dark-theme .subtitle, .ocean-blue-theme .subtitle, .purple-theme .subtitle {
    color: #cccccc;
}

.drawing-area {
    display: flex;
    gap: 25px;
    margin-bottom: 35px;
}

.canvas-container {
    position: relative;
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: auto;
    max-width: 600px;
}

canvas {
    background: white;
    border: none;
    border-radius: 16px;
    cursor: crosshair;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    width: 100%;
    height: auto;
    display: block;
}

.dark-theme canvas, .ocean-blue-theme canvas, .purple-theme canvas {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.undo-redo-controls {
    display: flex;
    gap: 10px;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px;
    border-radius: 50px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.undo-redo-controls:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.dark-theme .undo-redo-controls {
    background: rgba(40, 40, 40, 0.9);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.25);
}

.ocean-blue-theme .undo-redo-controls {
    background: rgba(0, 53, 89, 0.9);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.25);
}

.purple-theme .undo-redo-controls {
    background: rgba(36, 0, 70, 0.9);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.25);
}

.undo-redo-controls button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #4361ee;
    transition: all 0.2s ease;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.08);
    font-size: 16px;
}

.undo-redo-controls button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.12);
    color: #3451d1;
}

.undo-redo-controls button:active {
    transform: translateY(-1px);
}

.dark-theme .undo-redo-controls button {
    background: rgba(60, 60, 60, 0.9);
    color: #e0e0e0;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.ocean-blue-theme .undo-redo-controls button {
    background: rgba(0, 65, 109, 0.9);
    color: #e0e0e0;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.purple-theme .undo-redo-controls button {
    background: rgba(56, 0, 110, 0.9);
    color: #e0e0e0;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.undo-redo-controls button:disabled {
    opacity: 0.4;
    transform: none;
    box-shadow: none;
    cursor: not-allowed;
}

.tools-panel {
    width: 280px;
    background: #f8f9fa;
    border-radius: 16px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.dark-theme .tools-panel {
    background: rgba(40, 40, 40, 0.9);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.ocean-blue-theme .tools-panel {
    background: rgba(0, 53, 89, 0.9);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.purple-theme .tools-panel {
    background: rgba(36, 0, 70, 0.9);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.tool-section {
    position: relative;
}

.tool-section h3 {
    position: relative;
    display: inline-block;
    margin-bottom: 15px;
}

.tool-section h3::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 40px;
    height: 3px;
    background: #4361ee;
    border-radius: 3px;
}

.dark-theme .tool-section h3::after {
    background: #738adb;
}

.ocean-blue-theme .tool-section h3::after {
    background: #4cc9f0;
}

.purple-theme .tool-section h3::after {
    background: #b5179e;
}

.tool-buttons, .brush-shapes {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.tool-btn, .shape-btn {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: white;
    border: none;
    transition: all 0.3s ease;
    font-size: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.tool-btn:hover, .shape-btn:hover {
    background: #f5f7ff;
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

.tool-btn:active, .shape-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.06);
}

.tool-btn.active, .shape-btn.active {
    background: #4361ee;
    color: white;
    box-shadow: 0 6px 15px rgba(67, 97, 238, 0.25);
}

.dark-theme .tool-btn, .dark-theme .shape-btn {
    background: rgba(60, 60, 60, 0.9);
    color: #e0e0e0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.ocean-blue-theme .tool-btn, .ocean-blue-theme .shape-btn {
    background: rgba(0, 65, 109, 0.9);
    color: #e0e0e0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.purple-theme .tool-btn, .purple-theme .shape-btn {
    background: rgba(56, 0, 110, 0.9);
    color: #e0e0e0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.dark-theme .tool-btn:hover, .dark-theme .shape-btn:hover {
    background: rgba(75, 75, 75, 0.9);
}

.ocean-blue-theme .tool-btn:hover, .ocean-blue-theme .shape-btn:hover {
    background: rgba(0, 80, 130, 0.9);
}

.purple-theme .tool-btn:hover, .purple-theme .shape-btn:hover {
    background: rgba(70, 0, 130, 0.9);
}

.dark-theme .tool-btn.active, .dark-theme .shape-btn.active {
    background: #738adb;
}

.ocean-blue-theme .tool-btn.active, .ocean-blue-theme .shape-btn.active {
    background: #4cc9f0;
}

.purple-theme .tool-btn.active, .purple-theme .shape-btn.active {
    background: #b5179e;
}

input[type="color"] {
    width: 100%;
    height: 48px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    padding: 0;
    margin-bottom: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

input[type="color"]:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

.color-presets {
    display: flex;
    gap: 12px;
    margin-bottom: 15px;
    justify-content: space-between;
}

.color-preset {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.color-preset:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.12);
}

input[type="range"] {
    width: 100%;
    cursor: pointer;
    margin-top: 10px;
    height: 8px;
    -webkit-appearance: none;
    background: #e0e0e0;
    border-radius: 4px;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #4361ee;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(67, 97, 238, 0.3);
    transition: all 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 3px 8px rgba(67, 97, 238, 0.4);
}

.dark-theme input[type="range"] {
    background: #444;
}

.dark-theme input[type="range"]::-webkit-slider-thumb {
    background: #738adb;
}

.ocean-blue-theme input[type="range"] {
    background: #006d99;
}

.ocean-blue-theme input[type="range"]::-webkit-slider-thumb {
    background: #4cc9f0;
}

.purple-theme input[type="range"] {
    background: #3a015c;
}

.purple-theme input[type="range"]::-webkit-slider-thumb {
    background: #b5179e;
}

.action-panel {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-bottom: 30px;
}

.ai-options {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
}

.dark-theme .ai-options {
    background: rgba(40, 40, 40, 0.9);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.ocean-blue-theme .ai-options {
    background: rgba(0, 53, 89, 0.9);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.purple-theme .ai-options {
    background: rgba(36, 0, 70, 0.9);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.ai-option-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.ai-option-btn {
    padding: 12px 20px;
    border-radius: 50px;
    background: white;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.ai-option-btn:hover {
    background: #f5f7ff;
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

.ai-option-btn:active {
    transform: translateY(-1px);
}

.ai-option-btn.active {
    background: #4361ee;
    color: white;
    box-shadow: 0 6px 15px rgba(67, 97, 238, 0.25);
}

.dark-theme .ai-option-btn {
    background: rgba(60, 60, 60, 0.9);
    color: #e0e0e0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.dark-theme .ai-option-btn:hover {
    background: rgba(75, 75, 75, 0.9);
}

.dark-theme .ai-option-btn.active {
    background: #738adb;
}

.ocean-blue-theme .ai-option-btn {
    background: rgba(0, 65, 109, 0.9);
    color: #e0e0e0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.ocean-blue-theme .ai-option-btn:hover {
    background: rgba(0, 80, 130, 0.9);
}

.ocean-blue-theme .ai-option-btn.active {
    background: #4cc9f0;
}

.purple-theme .ai-option-btn {
    background: rgba(56, 0, 110, 0.9);
    color: #e0e0e0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.purple-theme .ai-option-btn:hover {
    background: rgba(70, 0, 130, 0.9);
}

.purple-theme .ai-option-btn.active {
    background: #b5179e;
}

.primary-btn, .secondary-btn {
    padding: 16px 24px;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.primary-btn::after, .secondary-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.6s cubic-bezier(0.7, 0, 0.2, 1);
    z-index: -1;
}

.primary-btn:hover::after, .secondary-btn:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.primary-btn {
    background: linear-gradient(45deg, #4361ee, #3a56d4);
    color: white;
    box-shadow: 0 8px 20px rgba(67, 97, 238, 0.3);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(67, 97, 238, 0.4);
}

.secondary-btn {
    background: linear-gradient(45deg, #38b000, #2d9600);
    color: white;
    box-shadow: 0 8px 20px rgba(56, 176, 0, 0.3);
}

.secondary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(56, 176, 0, 0.4);
}

.primary-btn:active, .secondary-btn:active {
    transform: translateY(-1px);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.result-area {
    padding: 35px;
    border-radius: 16px;
    background: #f8f9fa;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    animation: fadeInUp 0.5s ease-out;
    margin-top: 30px;
    position: relative;
    overflow: hidden;
}

.result-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #4361ee, #38b000);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dark-theme .result-area {
    background: rgba(40, 40, 40, 0.9);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.dark-theme .result-area::before {
    background: linear-gradient(90deg, #738adb, #2d9600);
}

.ocean-blue-theme .result-area {
    background: rgba(0, 53, 89, 0.9);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.ocean-blue-theme .result-area::before {
    background: linear-gradient(90deg, #4cc9f0, #38b000);
}

.purple-theme .result-area {
    background: rgba(36, 0, 70, 0.9);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.purple-theme .result-area::before {
    background: linear-gradient(90deg, #b5179e, #38b000);
}

.rating-container {
    margin: 25px 0;
}

.ai-description {
    margin-bottom: 25px;
    line-height: 1.8;
    padding: 25px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
}

.dark-theme .ai-description {
    background: rgba(50, 50, 50, 0.6);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.ocean-blue-theme .ai-description {
    background: rgba(0, 63, 99, 0.6);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.purple-theme .ai-description {
    background: rgba(46, 0, 80, 0.6);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.rating-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-top: 25px;
    background: white;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
}

.dark-theme .rating-display {
    background: rgba(50, 50, 50, 0.6);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.ocean-blue-theme .rating-display {
    background: rgba(0, 63, 99, 0.6);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.purple-theme .rating-display {
    background: rgba(46, 0, 80, 0.6);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.rating-stars {
    display: flex;
    gap: 8px;
    font-size: 32px;
    color: #ffb703;
    filter: drop-shadow(0 3px 5px rgba(255, 183, 3, 0.3));
}

.rating-number {
    font-size: 32px;
    font-weight: bold;
    color: #4361ee;
    font-family: 'Luckiest Guy', cursive;
    text-shadow: 0 2px 4px rgba(67, 97, 238, 0.15);
}

.dark-theme .rating-number {
    color: #738adb;
}

.ocean-blue-theme .rating-number {
    color: #4cc9f0;
}

.purple-theme .rating-number {
    color: #b5179e;
}

.points-display {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 30px;
    margin-top: 25px;
    background: white;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
    flex-wrap: wrap;
}

.dark-theme .points-display {
    background: rgba(50, 50, 50, 0.6);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.ocean-blue-theme .points-display {
    background: rgba(0, 63, 99, 0.6);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.purple-theme .points-display {
    background: rgba(46, 0, 80, 0.6);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.points-section, .market-section {
    display: flex;
    align-items: center;
    gap: 20px;
    min-width: 220px;
    position: relative;
}

.points-section::after, .market-section::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 80%;
    height: 3px;
    background: rgba(67, 97, 238, 0.2);
    border-radius: 3px;
}

.points-section i, .market-section i {
    font-size: 28px;
    color: #4361ee;
    filter: drop-shadow(0 3px 5px rgba(67, 97, 238, 0.2));
}

.dark-theme .points-section i, .dark-theme .market-section i {
    color: #738adb;
}

.ocean-blue-theme .points-section i, .ocean-blue-theme .market-section i {
    color: #4cc9f0;
}

.purple-theme .points-section i, .purple-theme .market-section i {
    color: #b5179e;
}

.points-info, .market-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.points-value, .art-value {
    font-size: 28px;
    font-weight: bold;
    color: #38b000;
    font-family: 'Luckiest Guy', cursive;
    text-shadow: 0 2px 4px rgba(56, 176, 0, 0.15);
}

.hidden {
    display: none;
}

.loading-indicator {
    text-align: center;
    margin: 30px 0;
    animation: fadeIn 0.5s ease;
    padding: 30px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
}

.dark-theme .loading-indicator {
    background: rgba(40, 40, 40, 0.9);
}

.ocean-blue-theme .loading-indicator {
    background: rgba(0, 53, 89, 0.9);
}

.purple-theme .loading-indicator {
    background: rgba(36, 0, 70, 0.9);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.spinner {
    width: 60px;
    height: 60px;
    border: 6px solid rgba(67, 97, 238, 0.1);
    border-left-color: #4361ee;
    border-radius: 50%;
    animation: spin 1.2s cubic-bezier(0.17, 0.67, 0.83, 0.67) infinite;
    margin: 0 auto 20px;
}

.dark-theme .spinner {
    border: 6px solid rgba(115, 138, 219, 0.1);
    border-left-color: #738adb;
}

.ocean-blue-theme .spinner {
    border: 6px solid rgba(76, 201, 240, 0.1);
    border-left-color: #4cc9f0;
}

.purple-theme .spinner {
    border: 6px solid rgba(181, 23, 158, 0.1);
    border-left-color: #b5179e;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.layers-header, .layer-btn, .layers-list, .layer-item, .layer-name,
.layer-visibility-btn, .layer-delete-btn, .layer-move-btn,
.layer-opacity-control, .opacity-value, .layer-move-controls {
    display: none;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropbtn {
    background: linear-gradient(45deg, #4361ee, #3a56d4);
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 6px 15px rgba(67, 97, 238, 0.25);
}

.dropbtn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.35);
}

.dropbtn:active {
    transform: translateY(-1px);
    box-shadow: 0 6px 15px rgba(67, 97, 238, 0.25);
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    background-color: white;
    min-width: 180px;
    box-shadow: 0px 15px 35px rgba(0,0,0,0.15);
    z-index: 1;
    border-radius: 16px;
    overflow: hidden;
    transform-origin: top right;
    animation: dropdownOpen 0.3s cubic-bezier(0.17, 0.67, 0.83, 0.67);
}

@keyframes dropdownOpen {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.dark-theme .dropdown-content {
    background-color: #2d2d2d;
    box-shadow: 0px 15px 35px rgba(0,0,0,0.3);
}

.ocean-blue-theme .dropdown-content {
    background-color: #00273d;
    box-shadow: 0px 15px 35px rgba(0,0,0,0.3);
}

.purple-theme .dropdown-content {
    background-color: #1a0033;
    box-shadow: 0px 15px 35px rgba(0,0,0,0.3);
}

.dropdown-content button {
    color: #333;
    padding: 15px 20px;
    text-decoration: none;
    display: block;
    width: 100%;
    text-align: left;
    cursor: pointer;
    border: none;
    background: transparent;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.dark-theme .dropdown-content button,
.ocean-blue-theme .dropdown-content button,
.purple-theme .dropdown-content button {
    color: #e0e0e0;
}

.dropdown-content button:hover {
    background-color: #f5f7ff;
    padding-left: 25px;
}

.dark-theme .dropdown-content button:hover {
    background-color: #3d3d3d;
}

.ocean-blue-theme .dropdown-content button:hover {
    background-color: #00395a;
}

.purple-theme .dropdown-content button:hover {
    background-color: #2b0066;
}

.dropdown-content button.active {
    background-color: #f0f3ff;
    font-weight: bold;
    border-left: 3px solid #4361ee;
}

.dark-theme .dropdown-content button.active {
    background-color: #3a3a3a;
    border-left: 3px solid #738adb;
}

.ocean-blue-theme .dropdown-content button.active {
    background-color: #00395a;
    border-left: 3px solid #4cc9f0;
}

.purple-theme .dropdown-content button.active {
    background-color: #2b0066;
    border-left: 3px solid #b5179e;
}

.dropdown:hover .dropdown-content {
    display: block;
}

@media (max-width: 768px) {
    .drawing-area {
        flex-direction: column;
    }
    
    .tools-panel {
        width: 100%;
    }

    .header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .points-counter, .theme-controls {
        margin: 10px 0;
    }

    .layer-item {
        flex-wrap: wrap;
    }
    
    .layer-opacity-control,
    .layer-move-controls {
        width: 100%;
        justify-content: space-between;
    }
}