:root {
    --primary-color: #5e72e4;
    --primary-hover: #4c63d2;
    --secondary-color: #11cdef;
    --success-color: #2dce89;
    --danger-color: #f5365c;
    --warning-color: #fb6340;
    --bg-color: #f4f5f7;
    --card-bg: #ffffff;
    --text-primary: #32325d;
    --text-secondary: #525f7f;
    --text-muted: #8898aa;
    --border-color: #e9ecef;
    --shadow: 0 0 2rem 0 rgba(136,152,170,.15);
    --shadow-hover: 0 0 3rem 0 rgba(136,152,170,.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: var(--card-bg);
    box-shadow: 0 1px 0 0 var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.language-selector select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    background-color: var(--card-bg);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.language-selector select:hover {
    border-color: var(--primary-color);
}

/* Main Content */
main {
    flex: 1;
    padding: 3rem 0;
}

/* Upload Section */
.upload-section {
    background-color: var(--card-bg);
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 0.5rem;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--bg-color);
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(94, 114, 228, 0.05);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(94, 114, 228, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-area h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.upload-area p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.supported-formats {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    text-align: center;
    padding: 1.5rem;
    border-radius: 0.5rem;
    background-color: var(--bg-color);
    transition: all 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.feature h3 {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.feature p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Processing Section */
.processing-section {
    background-color: var(--card-bg);
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    padding: 2rem;
}

.image-preview {
    max-width: 600px;
    margin: 0 auto 2rem;
    text-align: center;
}

.image-preview img {
    max-width: 100%;
    max-height: 400px;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
}

/* Controls */
.controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.controls label {
    font-weight: 500;
    color: var(--text-secondary);
}

.controls select {
    padding: 0.75rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    background-color: var(--card-bg);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.controls select:hover {
    border-color: var(--primary-color);
}

/* Buttons */
.process-button,
.reset-button,
.action-button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.process-button {
    background-color: var(--primary-color);
    color: white;
}

.process-button:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(94, 114, 228, 0.3);
}

.process-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.reset-button {
    background-color: var(--warning-color);
    color: white;
}

.reset-button:hover {
    background-color: #ea5227;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(251, 99, 64, 0.3);
}

.action-button {
    background-color: var(--success-color);
    color: white;
}

.action-button:hover {
    background-color: #26b56a;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(45, 206, 137, 0.3);
}

/* Loading */
.loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Result Section */
.result-section {
    background-color: var(--bg-color);
    border-radius: 0.5rem;
    padding: 2rem;
    margin-top: 2rem;
}

.result-section h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.result-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

#resultText {
    width: 100%;
    min-height: 200px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    background-color: var(--card-bg);
    color: var(--text-primary);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    resize: vertical;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--success-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 0.375rem;
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
}

footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .upload-area {
        padding: 2rem;
    }
    
    .features {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .controls {
        flex-direction: column;
        width: 100%;
    }
    
    .controls select,
    .process-button,
    .reset-button {
        width: 100%;
    }
    
    .result-actions {
        flex-direction: column;
    }
    
    .action-button {
        width: 100%;
    }
    
    .toast {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
    }
}