/* Custom CSS for PDF Compressor */

/* Root Variables */
:root {
    --primary-color: #154E9B;
    --secondary-color: #4784F1;
    --success-color: #22c55e;
    --info-color: #0ea5e9;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --light-color: #f8fafc;
    --dark-color: #1e293b;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --border-radius: 1rem;
    --border-radius-sm: 0.5rem;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Styles */
body {
    font-family: 'Plus Jakarta Sans', 'Segoe UI', 'Roboto', system-ui, -apple-system, sans-serif;
    background: #ffffff !important;
    background-color: #ffffff !important;
    min-height: 100vh;
    line-height: 1.7;
    color: var(--gray-700);
    letter-spacing: -0.025em;
}

html {
    background: #ffffff !important;
    background-color: #ffffff !important;
}

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

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

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

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.8s ease-out;
}

.slide-up {
    animation: slideUp 0.6s ease-out;
}

.spin {
    animation: spin 2s linear infinite;
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

.bounce {
    animation: bounce 1s ease-in-out;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color) !important;
    transition: var(--transition);
    letter-spacing: -0.05em;
}

.navbar-brand:hover {
    color: var(--secondary-color) !important;
    transform: translateY(-1px);
}

/* Cards */
.card {
    border-radius: var(--border-radius);
    transition: var(--transition);
    background: #ffffff;
    border: 1px solid var(--gray-200);
    box-shadow: var(--box-shadow);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
    border-color: var(--gray-300);
}

/* Upload Area */
.upload-area {
    background: linear-gradient(135deg, rgba(21, 78, 155, 0.05), rgba(71, 132, 241, 0.08));
    border: 2px dashed var(--gray-300);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    transition: var(--transition);
    opacity: 0;
}

.upload-area:hover::before {
    opacity: 1;
    animation: shimmer 1.5s ease-in-out;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.upload-area:hover {
    border-color: var(--secondary-color) !important;
    background: linear-gradient(135deg, rgba(21, 78, 155, 0.08), rgba(71, 132, 241, 0.12));
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: var(--primary-color) !important;
    background: linear-gradient(135deg, rgba(21, 78, 155, 0.12), rgba(71, 132, 241, 0.15));
    transform: scale(1.02);
    box-shadow: var(--box-shadow-lg);
}

/* Buttons */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    letter-spacing: -0.025em;
    font-size: 0.875rem;
    padding: 0.75rem 1.5rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.25);
}

.btn:active {
    transform: translateY(0);
}

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

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

.btn-success {
    background: var(--success-color);
    border-color: var(--success-color);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

.btn-check:checked + .btn {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    box-shadow: 0 0 0 3px rgba(21, 78, 155, 0.2);
}

/* Progress Bar */
.progress {
    border-radius: var(--border-radius-sm);
    background: var(--gray-200);
    box-shadow: none;
    height: 0.75rem;
}

.progress-bar {
    border-radius: var(--border-radius-sm);
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: progressShine 2s ease-in-out infinite;
}

@keyframes progressShine {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* Feature Cards */
.feature-card {
    transition: var(--transition);
    border-radius: var(--border-radius);
    background: #ffffff;
    border: 1px solid var(--gray-200);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 280px;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
    border-color: var(--gray-300);
}

/* Alternating background colors for feature cards */
.feature-card:nth-child(1) {
    background: linear-gradient(135deg, var(--primary-color), #1e5bb8);
    color: white;
    border: none;
}

.feature-card:nth-child(1) h5,
.feature-card:nth-child(1) i {
    color: white !important;
}

.feature-card:nth-child(1) p {
    color: rgba(255, 255, 255, 0.9);
}

.feature-card:nth-child(2) {
    background: #ffffff;
}

.feature-card:nth-child(3) {
    background: linear-gradient(135deg, var(--secondary-color), #6b9bf7);
    color: white;
    border: none;
}

.feature-card:nth-child(3) h5,
.feature-card:nth-child(3) i {
    color: white !important;
}

.feature-card:nth-child(3) p {
    color: rgba(255, 255, 255, 0.9);
}

.feature-card i {
    transition: var(--transition);
}

.feature-card:hover i {
    transform: scale(1.2);
    animation: bounce 0.6s ease-in-out;
}

/* Alert Styles */
.alert {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--box-shadow);
    animation: slideUp 0.5s ease-out;
}

/* Typography Improvements */
h1, h2, h3, h4, h5, h6 {
    color: var(--gray-800);
    font-weight: 600;
}

.display-4 {
    font-weight: 800;
}

/* Main Container */
main {
    padding-top: 8rem;
}

/* Spacing adjustments */
.mb-5 {
    margin-bottom: 3.5rem !important;
}

.mt-5 {
    margin-top: 3.5rem !important;
}

/* Footer */
footer {
    background: var(--gray-100) !important;
    border-top: 1px solid var(--gray-200);
}

/* Responsive Design */
@media (max-width: 768px) {
    .display-5 {
        font-size: 2rem;
    }
    
    .upload-area {
        padding: 2rem 1rem !important;
    }
    
    .upload-area i {
        font-size: 3rem !important;
    }
    
    .feature-card {
        margin-bottom: 2rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card-body {
        padding: 1.5rem !important;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
}

/* Touch devices */
@media (hover: none) and (pointer: coarse) {
    .upload-area:hover {
        transform: none;
    }
    
    .btn:hover {
        transform: none;
    }
    
    .card:hover {
        transform: none;
    }
    
    .feature-card:hover {
        transform: none;
    }
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* Success animations */
.success-animation {
    animation: successPulse 0.6s ease-in-out;
}

@keyframes successPulse {
    0% {
        transform: scale(1);
        background: var(--success-color);
    }
    50% {
        transform: scale(1.05);
        background: #20c997;
    }
    100% {
        transform: scale(1);
        background: var(--success-color);
    }
}

/* Error animations */
.error-animation {
    animation: errorShake 0.6s ease-in-out;
}

@keyframes errorShake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

/* Scroll animations */
.scroll-fade {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-fade.visible {
    opacity: 1;
    transform: translateY(0);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .upload-area {
        border-width: 3px;
    }
    
    .btn {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .upload-area::before,
    .btn::before,
    .progress-bar::after {
        display: none;
    }
}

/* Content Protection */
* {
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
    user-select: none !important;
    -webkit-touch-callout: none !important;
    -webkit-tap-highlight-color: transparent !important;
}

body {
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
    user-select: none !important;
    -webkit-touch-callout: none !important;
    -webkit-tap-highlight-color: transparent !important;
}

/* Disable text selection on all elements */
::selection {
    background: transparent !important;
}

::-moz-selection {
    background: transparent !important;
}

/* Disable image dragging */
img {
    -webkit-user-drag: none !important;
    -khtml-user-drag: none !important;
    -moz-user-drag: none !important;
    -o-user-drag: none !important;
    user-drag: none !important;
    pointer-events: none !important;
}

/* Disable highlighting */
.no-select {
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
    user-select: none !important;
}

/* Hide scrollbars to prevent view source tricks */
::-webkit-scrollbar {
    display: none !important;
}

/* Disable print */
@media print {
    body {
        display: none !important;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --light-color: #343a40;
        --dark-color: #f8f9fa;
    }
    
    body {
        background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    }
    
    .card {
        background: rgba(52, 58, 64, 0.95);
        color: var(--dark-color);
    }
    
    .feature-card {
        background: rgba(52, 58, 64, 0.9);
        color: var(--dark-color);
    }
    
    .upload-area {
        background: linear-gradient(45deg, rgba(13, 110, 253, 0.2), rgba(25, 135, 84, 0.2));
        color: var(--dark-color);
    }
}