/* Shared styles for PDF Tools application */

/* CSS Variables for theming */
:root {
    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-light: #e0e7ff;
    --color-bg-gradient-from: #eff6ff;
    --color-bg-gradient-to: #e0e7ff;
    --color-text-primary: #1f2937;
    --color-text-secondary: #4b5563;
    --color-text-muted: #6b7280;
    --color-border: #d1d5db;
    --color-success-bg: #ecfdf5;
    --color-success-border: #a7f3d0;
    --color-success-text: #047857;
    --color-error-bg: #fef2f2;
    --color-error-border: #fecaca;
    --color-error-text: #dc2626;
    --color-info-bg: #eff6ff;
    --color-info-border: #bfdbfe;
    --color-info-text: #1e40af;
    --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);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --transition-fast: 150ms;
    --transition-normal: 300ms;
    --focus-ring: 0 0 0 3px rgba(79, 70, 229, 0.5);
}

/* Dark mode variables */
.dark {
    --color-bg-gradient-from: #1a202c;
    --color-bg-gradient-to: #2d3748;
    --color-text-primary: #f7fafc;
    --color-text-secondary: #cbd5e0;
    --color-text-muted: #a0aec0;
    --color-border: #4a5568;
    --color-primary-light: #2d3748;
    --color-success-bg: #22543d;
    --color-success-border: #38a169;
    --color-success-text: #9ae6b4;
    --color-error-bg: #742a2a;
    --color-error-border: #c53030;
    --color-error-text: #feb2b2;
    --color-info-bg: #2d3748;
    --color-info-border: #4a5568;
    --color-info-text: #90cdf4;
}

/* Base styles */
body {
    background: linear-gradient(to bottom right, var(--color-bg-gradient-from), var(--color-bg-gradient-to));
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Focus visible styles for accessibility */
.focus-visible:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* Button base styles */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    font-weight: 600;
    color: white;
    background-color: var(--color-primary);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    transform: scale(1.02);
}

.btn-primary:active:not(:disabled) {
    transform: scale(0.98);
}

.btn-primary:disabled {
    background-color: #d1d5db;
    cursor: not-allowed;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    color: var(--color-primary);
    background-color: transparent;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

/* Card styles */
.card {
    background-color: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: 2rem;
    transition: background-color var(--transition-normal);
}

.dark .card {
    background-color: #1a202c;
}

/* Drop area styles */
.drop-area {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.drop-area:hover {
    border-color: var(--color-primary);
    background-color: rgba(79, 70, 229, 0.05);
}

.drop-area-active {
    background-color: rgba(79, 70, 229, 0.1);
    border-color: var(--color-primary);
}

.dark .drop-area:hover {
    background-color: rgba(79, 70, 229, 0.1);
}

.dark .drop-area-active {
    background-color: rgba(79, 70, 229, 0.1);
    border-color: #818cf8;
}

/* Progress bar styles */
.progress-container {
    width: 100%;
}

.progress-bar-track {
    width: 100%;
    background-color: #e5e7eb;
    border-radius: 9999px;
    height: 0.5rem;
    overflow: hidden;
}

.dark .progress-bar-track {
    background-color: #4a5568;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: 9999px;
    transition: width var(--transition-normal);
}

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

.progress-bar-indeterminate .progress-bar-fill {
    animation: progress-indeterminate 1.5s infinite;
}

/* Alert styles */
.alert {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid;
}

.alert-error {
    background-color: var(--color-error-bg);
    border-color: var(--color-error-border);
    color: var(--color-error-text);
}

.alert-success {
    background-color: var(--color-success-bg);
    border-color: var(--color-success-border);
    color: var(--color-success-text);
}

.alert-info {
    background-color: var(--color-info-bg);
    border-color: var(--color-info-border);
    color: var(--color-info-text);
}

/* Modal styles */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: white;
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    max-width: 32rem;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform var(--transition-fast);
}

.modal-overlay.open .modal-content {
    transform: scale(1);
}

.dark .modal-content {
    background-color: #1a202c;
}

/* File list styles */
.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background-color: #f9fafb;
    border-radius: var(--radius-lg);
    transition: background-color var(--transition-fast);
}

.dark .file-item {
    background-color: #2d3748;
}

.file-item:hover {
    background-color: #f3f4f6;
}

.dark .file-item:hover {
    background-color: #4a5568;
}

.file-item-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.875rem;
    color: var(--color-text-primary);
}

.file-item-actions {
    display: flex;
    gap: 0.5rem;
    margin-left: 0.75rem;
}

/* Navigation styles */
.nav-menu {
    display: flex;
    gap: 0.25rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.desktop-nav {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.desktop-nav::-webkit-scrollbar {
    display: none;
}

.nav-link {
    display: inline-block;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-lg);
    font-weight: 500;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.nav-link-active {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.nav-link-inactive {
    color: var(--color-text-secondary);
}

.nav-link-inactive:hover {
    background-color: #f3f4f6;
}

.dark .nav-link-inactive:hover {
    background-color: #4a5568;
}

/* Desktop nav link with icons */
.desktop-nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-lg);
    font-weight: 500;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.desktop-nav-link.active,
.desktop-nav-link.bg-indigo-100 {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.desktop-nav-link:not(.active):not(.bg-indigo-100) {
    color: var(--color-text-secondary);
}

.desktop-nav-link:not(.active):not(.bg-indigo-100):hover {
    background-color: #f3f4f6;
}

.dark .desktop-nav-link:not(.active):not(.bg-indigo-100):hover {
    background-color: #4a5568;
}

/* Touch target optimization for mobile */
@media (max-width: 640px) {
    button,
    a,
    input,
    select {
        min-height: 44px;
        min-width: 44px;
    }
    
    .nav-link {
        padding: 0.75rem 1rem;
    }
}

/* Prevent horizontal scrolling */
html, body {
    overflow-x: hidden;
    max-width: 100vw;
}

/* Loading spinner */
.spinner {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Visually hidden but accessible */
.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;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 0.5rem 1rem;
    z-index: 100;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* Responsive utilities */
@media (max-width: 768px) {
    .card {
        padding: 1.5rem;
        border-radius: var(--radius-xl);
    }
    
    .hide-mobile {
        display: none !important;
    }
}

@media (min-width: 769px) {
    .show-mobile-only {
        display: none !important;
    }
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }
}