/**
 * Social Caption Generator - Custom Styles
 * Modern, responsive design with smooth animations
 */

/* Root Variables */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    --border-radius: 0.5rem;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

.display-4 {
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

/* Navigation */
.navbar {
    backdrop-filter: blur(10px);
    background: rgba(13, 110, 253, 0.95) !important;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

/* Language Selector */
#languageSelect {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    transition: var(--transition);
}

#languageSelect:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25);
}

#languageSelect option {
    background: var(--dark-color);
    color: white;
}

/* Main Container */
.container {
    position: relative;
    z-index: 1;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
    transition: var(--transition);
    overflow: hidden;
}

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

.card-header {
    border: none;
    font-weight: 600;
    padding: 1.25rem;
}

.card-body {
    padding: 2rem;
}

/* Form Elements */
.form-control, .form-select {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: var(--transition);
    font-size: 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    transform: scale(1.02);
}

.form-control-lg {
    padding: 0.75rem 1rem;
    font-size: 1.1rem;
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

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

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    border: none;
}

/* Loading Animation */
#loadingState {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--border-radius);
    margin: 2rem 0;
    animation: fadeIn 0.5s ease;
}

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

.spinner-border {
    animation: spin 1s linear infinite;
}

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

/* Image Preview */
#imagePreview {
    animation: slideIn 0.5s ease;
}

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

#previewImg {
    border: 3px solid white;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

#previewImg:hover {
    transform: scale(1.05);
}

/* Results Section */
#resultsSection {
    animation: slideUp 0.7s ease;
}

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

/* Caption Cards */
.card-text {
    font-size: 1.1rem;
    line-height: 1.7;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Copy Button Animation */
.btn-outline-primary {
    position: relative;
    overflow: hidden;
}

.btn-outline-primary.copied {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
    animation: pulse 0.6s ease;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Features Section */
.features-icon {
    transition: var(--transition);
}

.features-icon:hover {
    transform: scale(1.1) rotate(5deg);
}

/* Error Section */
#errorSection {
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Footer */
footer {
    background: rgba(33, 37, 41, 0.95) !important;
    backdrop-filter: blur(10px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .display-4 {
        font-size: 2.5rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .btn-lg {
        padding: 0.6rem 1.5rem;
        font-size: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.3rem;
    }
    
    #languageSelect {
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .lead {
        font-size: 1rem;
    }
    
    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 0.95rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .card {
        background: white;
        border: 2px solid var(--dark-color);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --light-color: #212529;
        --dark-color: #f8f9fa;
    }
    
    body {
        background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    }
    
    .card {
        background: rgba(33, 37, 41, 0.95);
        color: var(--light-color);
    }
}

/* Print styles */
@media print {
    body {
        background: white !important;
    }
    
    .navbar, footer, #loadingState {
        display: none !important;
    }
    
    .card {
        background: white !important;
        box-shadow: none !important;
        border: 1px solid #ccc !important;
    }
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* Selection styles */
::selection {
    background: rgba(13, 110, 253, 0.3);
    color: var(--dark-color);
}

::-moz-selection {
    background: rgba(13, 110, 253, 0.3);
    color: var(--dark-color);
}