/* Global Styles and Variables */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #4ade80;
    --error-color: #f87171;
    --warning-color: #fbbf24;
    --bg-color: #f7f9fc;
    --card-bg: white;
    --text-primary: #333;
    --text-secondary: #666;
    --border-color: #e1e8ed;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 10px 20px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 40px rgba(0,0,0,0.1);
    --shadow-xl: 0 30px 60px rgba(0,0,0,0.2);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* Dark mode variables */
[data-theme="dark"] {
    --bg-color: #1a1b26;
    --card-bg: #24283b;
    --text-primary: #f7f7f7;
    --text-secondary: #a9b1d6;
    --border-color: #414868;
}

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

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
.header {
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-gradient);
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    padding: 8px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.theme-toggle:hover {
    border-color: var(--primary-color);
}

/* Cards and Sections */
.section {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    margin-bottom: 2rem;
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

input, select, textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-primary);
    transition: var(--transition);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--border-color);
    color: var(--text-primary);
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Image Upload */
.image-upload {
    border: 3px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    background: var(--card-bg);
}

.image-upload:hover {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.05);
}

.image-upload.dragover {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.image-upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.image-upload-text {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.image-upload-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.image-preview {
    margin-top: 1rem;
    display: none;
}

.image-preview.active {
    display: block;
}

.image-preview img {
    max-width: 300px;
    max-height: 300px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

/* Progress Bar */
.progress-container {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 2rem;
    display: none;
    box-shadow: var(--shadow-md);
}

.progress-container.active {
    display: block;
    animation: slideIn 0.3s ease;
}

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

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: var(--primary-gradient);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.status-message {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.logs {
    background: #1e1e1e;
    color: #4ade80;
    padding: 1rem;
    border-radius: 8px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    max-height: 300px;
    overflow-y: auto;
    margin-top: 1rem;
}

/* Results */
.result-container {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 2rem;
    display: none;
    box-shadow: var(--shadow-md);
}

.result-container.active {
    display: block;
    animation: slideIn 0.3s ease;
}

.result-container h3 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.result-container img,
.result-container video {
    width: 100%;
    max-width: 800px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 1rem;
}

.result-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* Error Messages */
.error {
    background: rgba(248, 113, 113, 0.1);
    color: var(--error-color);
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--error-color);
    margin: 1rem 0;
}

.success {
    background: rgba(74, 222, 128, 0.1);
    color: var(--success-color);
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--success-color);
    margin: 1rem 0;
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--card-bg);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 300px;
    animation: slideInRight 0.3s ease;
    z-index: 1000;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--error-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.tab {
    padding: 1rem 1.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.tab.active {
    color: var(--primary-color);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-gradient);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* Collapsible */
.collapsible {
    margin: 1rem 0;
}

.collapsible-header {
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.collapsible-header:hover {
    background: var(--border-color);
}

.collapsible-content {
    padding: 1rem;
    display: none;
}

.collapsible.active .collapsible-content {
    display: block;
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        width: 100%;
        justify-content: space-between;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .tabs {
        flex-wrap: wrap;
    }
    
    .result-actions {
        flex-direction: column;
    }
}

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden {
    display: none !important;
}

.flex {
    display: flex;
}

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

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }