/* Modern styles for Advanced PDF Compressor application */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #3B82F6;
    --primary-dark: #1D4ED8;
    --primary-light: #93C5FD;
    --secondary-color: #6B7280;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --info-color: #3B82F6;
    
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-tertiary: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base animations */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

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

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

@keyframes scaleIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

@keyframes shimmer {
    0% { background-position: -200px 0; }
    100% { background-position: calc(200px + 100%) 0; }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
    40%, 43% { transform: translate3d(0, -30px, 0); }
    70% { transform: translate3d(0, -15px, 0); }
    90% { transform: translate3d(0, -4px, 0); }
}

/* Utility animations */
.animate-spin { animation: spin 1s linear infinite; }
.animate-pulse { animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite; }
.animate-fadeIn { animation: fadeIn 0.5s ease-out; }
.animate-slideUp { animation: slideUp 0.4s ease-out; }
.animate-slideDown { animation: slideDown 0.4s ease-out; }
.animate-scaleIn { animation: scaleIn 0.3s ease-out; }
.animate-bounce { animation: bounce 2s infinite; }

/* Enhanced upload area styles */
.upload-area {
    transition: var(--transition);
    cursor: pointer;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px dashed #d1d5db;
    border-radius: var(--border-radius-lg);
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.5s;
}

.upload-area:hover::before {
    left: 100%;
}

.upload-area.drag-over {
    border-color: var(--primary-color);
    background: linear-gradient(145deg, #eff6ff 0%, #dbeafe 100%);
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.upload-area:hover {
    border-color: #6B7280;
    background: linear-gradient(145deg, #f9fafb 0%, #f3f4f6 100%);
    box-shadow: var(--shadow-md);
}

/* Profile card styles */
.profile-card {
    transition: var(--transition);
    cursor: pointer;
    border-radius: var(--border-radius);
    background: white;
    border: 2px solid #e5e7eb;
    position: relative;
    overflow: hidden;
}

.profile-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

.profile-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #d1d5db;
}

.profile-card:hover::before {
    transform: scaleX(1);
}

.profile-card.selected {
    border-color: var(--primary-color);
    background: linear-gradient(145deg, #eff6ff 0%, #dbeafe 100%);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.profile-card.selected::before {
    transform: scaleX(1);
}

/* Prediction card styles */
.prediction-card {
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg);
    position: relative;
    overflow: hidden;
}

.prediction-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

.analysis-card {
    background: var(--gradient-secondary);
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
}

.optimization-card {
    background: var(--gradient-tertiary);
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
}

/* Custom slider styles */
.slider-container {
    position: relative;
    margin: 1rem 0;
}

.slider-container input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: #e5e7eb;
    outline: none;
    appearance: none;
    transition: var(--transition);
}

.slider-container input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.slider-container input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.slider-container input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.slider-tooltip {
    position: absolute;
    top: -40px;
    transform: translateX(-50%);
    background: #1f2937;
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.slider-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: #1f2937;
}

.slider-tooltip.show {
    opacity: 1;
}

/* Progress bar enhancements */
.progress-bar {
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    border-radius: 9999px;
}

.progress-bar-animated {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark), var(--primary-color));
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

/* Stage indicator styles */
.stage-indicator {
    transition: var(--transition);
    border-radius: 9999px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    background: #f3f4f6;
    color: #6b7280;
    border: 2px solid transparent;
}

.stage-indicator.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
    animation: pulse 2s infinite;
}

.stage-indicator.completed {
    background: var(--success-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* Enhanced notification styles */
.notification {
    animation: slideDown 0.4s ease-out;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.notification-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.9), rgba(5, 150, 105, 0.9));
    color: white;
}

.notification-error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.9), rgba(220, 38, 38, 0.9));
    color: white;
}

.notification-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.9), rgba(217, 119, 6, 0.9));
    color: white;
}

.notification-info {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.9), rgba(37, 99, 235, 0.9));
    color: white;
}

/* Job status indicators with enhanced styling */
.job-status-pending {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
    border: 1px solid #f59e0b;
}

.job-status-processing {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    color: #1e40af;
    border: 1px solid #3b82f6;
    animation: pulse 2s infinite;
}

.job-status-completed {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #065f46;
    border: 1px solid #10b981;
}

.job-status-failed {
    background: linear-gradient(135deg, #fee2e2, #fecaca);
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* Loading states with modern design */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease-out;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-dots {
    display: flex;
    gap: 4px;
}

.loading-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
    animation: bounce 1.4s ease-in-out infinite both;
}

.loading-dots .dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dots .dot:nth-child(2) { animation-delay: -0.16s; }

/* Enhanced file list styles */
.file-item {
    transition: var(--transition);
    border-radius: var(--border-radius);
    background: white;
    border: 1px solid #e5e7eb;
}

.file-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.file-analysis {
    max-height: 400px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e0 #f7fafc;
}

.file-analysis::-webkit-scrollbar {
    width: 6px;
}

.file-analysis::-webkit-scrollbar-track {
    background: #f7fafc;
    border-radius: 3px;
}

.file-analysis::-webkit-scrollbar-thumb {
    background: #cbd5e0;
    border-radius: 3px;
    transition: var(--transition);
}

.file-analysis::-webkit-scrollbar-thumb:hover {
    background: #a0aec0;
}

/* Form validation enhancements */
.form-field.error input,
.form-field.error textarea,
.form-field.error select {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
    animation: shake 0.5s ease-in-out;
}

.form-field.success input,
.form-field.success textarea,
.form-field.success select {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

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

/* Button enhancements */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

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

.btn-secondary {
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: var(--border-radius);
    color: #374151;
    font-weight: 500;
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

/* Card enhancements */
.card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

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

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

.card-gradient {
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
}

/* Modal enhancements */
.modal-backdrop {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    animation: scaleIn 0.3s ease-out;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
}

/* Responsive enhancements */
@media (max-width: 768px) {
    .upload-area {
        min-height: 150px;
        padding: 1rem;
    }
    
    .notification {
        margin: 0 1rem;
        max-width: calc(100% - 2rem);
    }
    
    .profile-card {
        margin-bottom: 1rem;
    }
    
    .slider-container {
        margin: 0.5rem 0;
    }
    
    .prediction-card {
        padding: 1rem;
    }
}

@media (max-width: 640px) {
    :root {
        --border-radius: 0.375rem;
        --border-radius-lg: 0.75rem;
    }
    
    .stage-indicator {
        padding: 0.375rem 0.75rem;
        font-size: 0.75rem;
    }
    
    .file-item {
        padding: 0.75rem;
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #60A5FA;
        --primary-dark: #3B82F6;
        --secondary-color: #9CA3AF;
    }
    
    .upload-area {
        background: linear-gradient(145deg, #1f2937 0%, #111827 100%);
        border-color: #374151;
        color: #f9fafb;
    }
    
    .profile-card {
        background: #1f2937;
        border-color: #374151;
        color: #f9fafb;
    }
    
    .card {
        background: #1f2937;
        color: #f9fafb;
        border-color: #374151;
    }
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        color: black;
        background: white;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .btn-primary,
    .btn-secondary {
        border: 1px solid #000;
        background: white;
        color: black;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .upload-area {
        border-width: 3px;
    }
    
    .upload-area.drag-over {
        border-width: 4px;
    }
    
    .profile-card {
        border-width: 3px;
    }
    
    .profile-card.selected {
        border-width: 4px;
    }
    
    .btn-primary,
    .btn-secondary {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .upload-area.drag-over {
        transform: none;
    }
    
    .profile-card:hover {
        transform: none;
    }
    
    .file-item:hover {
        transform: none;
    }
    
    .btn-primary:hover {
        transform: none;
    }
}

/* Focus styles for accessibility */
.focus-visible:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

/* Custom scrollbar for modern browsers */
.custom-scrollbar {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-light) #f1f5f9;
}

.custom-scrollbar::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 4px;
    transition: var(--transition);
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Skeleton loading animation */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

/* Tooltip styles */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 140px;
    background-color: #1f2937;
    color: white;
    text-align: center;
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 12px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -70px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip .tooltip-text::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #1f2937 transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}