/* IDEA Light Theme - Global Styles */
:root {
    /* IDEA Light Theme Colors */
    --primary-bg: #ffffff;
    --secondary-bg: #f5f5f5;
    --tertiary-bg: #fafafa;
    --border-color: #e1e1e1;
    --border-hover: #c1c1c1;
    --text-primary: #2b2b2b;
    --text-secondary: #6e6e6e;
    --text-disabled: #999999;
    --accent-color: #365880;
    --accent-hover: #2d4a6b;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --info-color: #2196f3;
    
    /* Shadows */
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-medium: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 4px 16px rgba(0, 0, 0, 0.2);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Border Radius */
    --radius-sm: 3px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    
    /* Font */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-size-xs: 11px;
    --font-size-sm: 12px;
    --font-size-md: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-xxl: 24px;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--primary-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    background-color: var(--primary-bg);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-light);
}

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

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo img {
    max-height: 60px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo:hover img {
    transform: scale(1.05);
}

/* Language Switcher */
.language-switcher {
    position: relative;
    display: inline-block;
}

.language-dropdown {
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    cursor: pointer;
    min-width: 120px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right var(--spacing-sm) center;
    background-size: 16px;
    padding-right: var(--spacing-xl);
}

.language-dropdown:hover {
    border-color: var(--border-hover);
}

.language-dropdown:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(54, 88, 128, 0.2);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 140px);
    padding: var(--spacing-xl) 0;
}

.content-section {
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.section-title {
    font-size: var(--font-size-xxl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.section-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

/* Dropzone Styles */
.dropzone-container {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xxl);
    text-align: center;
    background-color: var(--tertiary-bg);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.dropzone-container:hover {
    border-color: var(--accent-color);
    background-color: rgba(54, 88, 128, 0.02);
}

.dropzone-container.dragover {
    border-color: var(--accent-color);
    background-color: rgba(54, 88, 128, 0.05);
    transform: scale(1.02);
}

.dropzone-icon {
    font-size: 48px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.dropzone-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.dropzone-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.dropzone-button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dropzone-button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

/* Footer */
.footer {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-info {
    color: var(--text-secondary);
    font-size: var(--font-size-md);
}

.footer-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-md);
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: var(--accent-color);
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-secondary);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .main-content {
        padding: var(--spacing-lg) 0;
    }
    
    .content-section {
        padding: var(--spacing-lg);
    }
    
    .dropzone-container {
        padding: var(--spacing-xl);
    }
    
    .dropzone-icon {
        font-size: 36px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-nav {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .dropzone-container {
        padding: var(--spacing-lg);
    }
    
    .dropzone-icon {
        font-size: 32px;
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Focus States */
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(54, 88, 128, 0.2);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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