/* Root Variables */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --light-gray: #f8f9fa;
    --dark-gray: #6c757d;
    --border-color: #dee2e6;
    --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-heavy: 0 8px 25px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--secondary-color);
    background-color: var(--light-gray);
}

.container-fluid {
    padding: 0;
    min-height: 100vh;
}

/* Left Panel Styles */
.left-panel {
    background: white;
    min-height: 100vh;
    padding: 2rem;
    box-shadow: var(--shadow-medium);
    overflow-y: auto;
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
}

.form-container header h1 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

/* Template Selector */
.template-selector {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1.5rem;
}

.template-options {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.template-btn {
    flex: 1;
    min-width: 120px;
    padding: 1rem;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.template-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

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

.template-btn i {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

/* Form Sections */
.form-sections {
    margin: 2rem 0;
}

.form-section {
    display: none;
    animation: fadeIn 0.3s ease;
}

.form-section.active {
    display: block;
}

.form-section h3 {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

/* Form Controls */
.form-control {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-label {
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

/* Profile Upload */
.profile-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.profile-upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(52, 152, 219, 0.05);
}

.profile-upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(52, 152, 219, 0.1);
}

.upload-placeholder {
    color: var(--dark-gray);
}

.profile-preview {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--border-color);
}

/* Experience, Education, and Portfolio Items */
.experience-item,
.education-item,
.portfolio-item {
    background: var(--light-gray);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--primary-color);
}

.remove-experience,
.remove-education,
.remove-portfolio {
    margin-top: 1rem;
}

/* Skills Categories */
.skills-categories {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-category h5 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

/* Navigation */
.form-navigation {
    display: flex;
    justify-content: space-between;
    margin: 2rem 0;
}

.form-navigation button {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.action-buttons button {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    min-width: 150px;
}

/* Right Panel Styles */
.right-panel {
    background: #f0f2f5;
    min-height: 100vh;
    padding: 2rem;
    overflow-y: auto;
}

.preview-container {
    max-width: 100%;
    margin: 0 auto;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.preview-header h3 {
    color: var(--secondary-color);
    font-weight: 700;
}

.preview-controls {
    display: flex;
    gap: 0.5rem;
}

.preview-content {
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow-medium);
    padding: 2rem;
    min-height: 80vh;
    overflow: auto;
}

.resume-preview {
    width: 100%;
    transform-origin: top center;
    transition: transform 0.3s ease;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    background: white;
    padding: 3rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow-heavy);
}

.loading-spinner i {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 991.98px) {
    .left-panel,
    .right-panel {
        min-height: auto;
        padding: 1rem;
    }
    
    .template-options {
        flex-direction: column;
    }
    
    .template-btn {
        min-width: auto;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .action-buttons button {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 767.98px) {
    .form-navigation {
        flex-direction: column;
        gap: 1rem;
    }
    
    .form-navigation button {
        width: 100%;
    }
    
    .preview-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .preview-content {
        padding: 1rem;
    }
}

@media (max-width: 575.98px) {
    .left-panel,
    .right-panel {
        padding: 0.5rem;
    }
    
    .form-container {
        padding: 1rem;
    }
    
    .template-options {
        gap: 0.5rem;
    }
    
    .experience-item,
    .education-item,
    .portfolio-item {
        padding: 1rem;
    }
}

/* Print Styles */
@media print {
    .left-panel {
        display: none !important;
    }
    
    .right-panel {
        width: 100% !important;
        padding: 0 !important;
        background: white !important;
    }
    
    .preview-header {
        display: none !important;
    }
    
    .preview-content {
        box-shadow: none !important;
        padding: 0 !important;
    }
    
    .resume-preview {
        transform: none !important;
    }
}

/* Button Hover Effects */
.btn {
    transition: var(--transition);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

/* Form Validation States */
.form-control.is-invalid {
    border-color: var(--accent-color);
}

.form-control.is-valid {
    border-color: var(--success-color);
}

.invalid-feedback {
    display: block;
    color: var(--accent-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: var(--dark-gray);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}