/* CSS Variables for Color Palette */
:root {
    --primary-color: #7868E6;
    --secondary-color: #B8B5FF;
    --light-bg: #EDEEF7;
    --accent-light: #E4FBFF;
    --accent-pink: #FFB4B4;
    --white: #ffffff;
    --dark: #2c3e50;
    --muted: #6c757d;
    --shadow: rgba(120, 104, 230, 0.15);
    --error-color: #dc3545;
    --success-color: #198754;
    --warning-color: #ffc107;
}

/* Paper Texture Base */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--light-bg) 0%, var(--accent-light) 100%);
    min-height: 100vh;
    position: relative;
    line-height: 1.6;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(120, 104, 230, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 180, 180, 0.05) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23B8B5FF' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
    z-index: -1;
}

/* Paper Texture Effect */
.paper-texture {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 
        0 4px 6px -1px var(--shadow),
        0 2px 4px -1px rgba(0, 0, 0, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.7);
    position: relative;
    border: 1px solid rgba(184, 181, 255, 0.1);
}

.paper-texture::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(90deg, transparent 50%, rgba(120, 104, 230, 0.02) 50%),
        linear-gradient(transparent 50%, rgba(120, 104, 230, 0.02) 50%);
    background-size: 20px 20px;
    border-radius: inherit;
    pointer-events: none;
}

/* Custom Bootstrap Overrides */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
    background: linear-gradient(135deg, #6b59d3 0%, #a5a2ff 100%);
}

.btn-primary:focus {
    box-shadow: 0 0 0 0.25rem rgba(120, 104, 230, 0.25);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.navbar-brand {
    color: var(--primary-color) !important;
    font-size: 1.5rem;
}

.nav-link {
    color: var(--dark) !important;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color) !important;
}

/* Hero Section */
.hero-card {
    margin-bottom: 3rem;
}

.display-4 {
    color: var(--primary-color);
}

.lead {
    color: var(--muted);
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Feature Cards */
.feature-card {
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(184, 181, 255, 0.2);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow);
}

.feature-icon {
    font-size: 2.5rem;
    display: block;
}

/* Data Management */
.data-category {
    border: 1px solid rgba(184, 181, 255, 0.2);
}

.data-item {
    background: rgba(237, 238, 247, 0.3);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.data-item:hover {
    background: rgba(237, 238, 247, 0.5);
    transform: translateX(5px);
}

.data-item.important {
    border-left-color: var(--accent-pink);
    background: rgba(255, 180, 180, 0.1);
}

.data-item h6 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.data-item p {
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.data-item-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    border-radius: 6px;
}

/* Share Section */
.share-config,
.share-result {
    border: 1px solid rgba(184, 181, 255, 0.2);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:focus {
    box-shadow: 0 0 0 0.25rem rgba(120, 104, 230, 0.25);
}

/* QR Code Container */
.qr-placeholder {
    padding: 3rem 1rem;
    background: rgba(237, 238, 247, 0.3);
    border-radius: 8px;
    border: 2px dashed rgba(184, 181, 255, 0.5);
}

#qrCodeContainer canvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--shadow);
}

/* Form Elements */
.form-control,
.form-select {
    border-radius: 8px;
    border: 1px solid rgba(184, 181, 255, 0.3);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(120, 104, 230, 0.25);
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--error-color);
    box-shadow: 0 0 0 0.25rem rgba(220, 53, 69, 0.25);
}

.form-control.is-valid,
.form-select.is-valid {
    border-color: var(--success-color);
    box-shadow: 0 0 0 0.25rem rgba(25, 135, 84, 0.25);
}

/* Offcanvas */
.offcanvas {
    border-radius: 12px 0 0 12px;
    border: 1px solid rgba(184, 181, 255, 0.2);
}

.offcanvas-header {
    background: linear-gradient(135deg, var(--light-bg) 0%, var(--accent-light) 100%);
    border-bottom: 1px solid rgba(184, 181, 255, 0.2);
}

/* Public Preview */
.public-preview {
    border: 1px solid rgba(184, 181, 255, 0.2);
}

.preview-item {
    background: rgba(237, 238, 247, 0.3);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--primary-color);
}

.preview-item.important {
    border-left-color: var(--accent-pink);
    background: rgba(255, 180, 180, 0.1);
}

/* Section Management */
.section-content {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

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

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

/* Drag and Drop Styles */
.drag-over {
    background: rgba(120, 104, 230, 0.1);
    border: 2px dashed var(--primary-color);
}

.draggable {
    cursor: move;
}

.draggable:hover {
    opacity: 0.8;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1055;
}

.toast {
    background: var(--white);
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--shadow);
    border: 1px solid rgba(184, 181, 255, 0.2);
}

.toast-header {
    background: linear-gradient(135deg, var(--light-bg) 0%, var(--accent-light) 100%);
    border-bottom: 1px solid rgba(184, 181, 255, 0.2);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .hero-card {
        padding: 2rem !important;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .feature-card {
        margin-bottom: 1rem;
    }
    
    .data-category {
        margin-bottom: 1rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .offcanvas {
        border-radius: 0;
    }
}

@media (max-width: 576px) {
    .hero-card {
        padding: 1.5rem !important;
    }
    
    .display-4 {
        font-size: 1.75rem;
    }
    
    .feature-icon {
        font-size: 2rem;
    }
    
    .data-item {
        padding: 0.75rem;
    }
    
    .btn {
        font-size: 0.875rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .offcanvas,
    footer {
        display: none !important;
    }
    
    .paper-texture {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    body::before {
        display: none;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #4a3ba8;
        --secondary-color: #9b98e8;
        --shadow: rgba(0, 0, 0, 0.3);
    }
    
    .paper-texture {
        border: 2px solid var(--primary-color);
    }
}

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

/* Focus Styles for Accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 6px;
}

/* Error and Success States */
.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.success-message {
    color: var(--success-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.warning-message {
    color: var(--warning-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Form Validation Styles */
.form-text {
    font-size: 0.875rem;
    color: var(--muted);
}

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

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

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

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

/* Accessibility Improvements */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Better focus indicators */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Improved button states */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Security and Responsibility Styles */
.security-warning {
    background: rgba(255, 193, 7, 0.1);
    border-radius: 8px;
    padding: 1rem;
    border-left: 4px solid var(--warning-color);
}

.selected-data-summary {
    background: rgba(13, 202, 240, 0.1);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid rgba(13, 202, 240, 0.3);
}

.category-badge {
    background: rgba(120, 104, 230, 0.1);
    border-radius: 6px;
    padding: 0.5rem;
    border: 1px solid rgba(120, 104, 230, 0.2);
    font-size: 0.875rem;
}

.security-checklist ul li {
    padding: 0.25rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.security-checklist ul li:last-child {
    border-bottom: none;
}

/* Alert Enhancements */
.alert {
    border-radius: 8px;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1) 0%, rgba(255, 193, 7, 0.05) 100%);
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: linear-gradient(135deg, rgba(13, 202, 240, 0.1) 0%, rgba(13, 202, 240, 0.05) 100%);
    border-left: 4px solid var(--info-color, #0dcaf0);
}

.alert-success {
    background: linear-gradient(135deg, rgba(25, 135, 84, 0.1) 0%, rgba(25, 135, 84, 0.05) 100%);
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.1) 0%, rgba(220, 53, 69, 0.05) 100%);
    border-left: 4px solid var(--error-color);
}

/* Modal Enhancements */
.modal-header.bg-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #ffca2c 100%) !important;
}

.modal-header.bg-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #20c997 100%) !important;
}

/* Card Enhancements */
.card.border-info {
    border-color: rgba(13, 202, 240, 0.3) !important;
    box-shadow: 0 2px 8px rgba(13, 202, 240, 0.1);
}

.card-header.bg-info {
    background: linear-gradient(135deg, #0dcaf0 0%, #0aa2c0 100%) !important;
}

/* Responsive Security Elements */
@media (max-width: 768px) {
    .security-warning,
    .selected-data-summary {
        padding: 0.75rem;
    }
    
    .category-badge {
        font-size: 0.8rem;
        padding: 0.4rem;
    }
    
    .alert {
        font-size: 0.875rem;
    }
}

/* Focus States for Security Elements */
.security-warning:focus-within,
.selected-data-summary:focus-within {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Animation for Security Warnings */
@keyframes securityPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.security-warning {
    animation: securityPulse 2s ease-in-out infinite;
}

/* High Contrast Mode for Security */
@media (prefers-contrast: high) {
    .security-warning {
        border-left-width: 6px;
        background: rgba(255, 193, 7, 0.2);
    }
    
    .alert {
        border-width: 2px;
    }
    
    .category-badge {
        border-width: 2px;
        background: rgba(120, 104, 230, 0.2);
    }
}