/* Modern Design System for YourNoteBook */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --background-light: #ffffff;
    --background-dark: #111827;
    --surface-light: #f9fafb;
    --surface-dark: #1f2937;
    --text-light: #111827;
    --text-dark: #f9fafb;
    --border-light: #e5e7eb;
    --border-dark: #374151;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

/* Dark mode variables */
.dark {
    --background-light: #111827;
    --background-dark: #f9fafb;
    --surface-light: #1f2937;
    --surface-dark: #f9fafb;
    --text-light: #f9fafb;
    --text-dark: #111827;
    --border-light: #374151;
    --border-dark: #e5e7eb;
}

/* Base styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    background-color: var(--background-light);
    transition: color var(--transition-normal), background-color var(--transition-normal);
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

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

/* Button base styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--surface-light);
    color: var(--text-light);
    border-color: var(--border-light);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--border-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-light);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--surface-light);
}

/* Card styles */
.card {
    background-color: var(--background-light);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

/* Input styles */
.input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background-color: var(--background-light);
    color: var(--text-light);
    transition: all var(--transition-normal);
}

.input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.input::placeholder {
    color: var(--secondary-color);
}

/* Badge styles */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    background-color: var(--surface-light);
    color: var(--text-light);
    border: 1px solid var(--border-light);
}

.badge-primary {
    background-color: rgb(59 130 246 / 0.1);
    color: var(--primary-color);
    border-color: rgb(59 130 246 / 0.2);
}

.badge-success {
    background-color: rgb(16 185 129 / 0.1);
    color: var(--success-color);
    border-color: rgb(16 185 129 / 0.2);
}

.badge-warning {
    background-color: rgb(245 158 11 / 0.1);
    color: var(--warning-color);
    border-color: rgb(245 158 11 / 0.2);
}

.badge-error {
    background-color: rgb(239 68 68 / 0.1);
    color: var(--error-color);
    border-color: rgb(239 68 68 / 0.2);
}

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

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

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

.animate-fade-in {
    animation: fadeIn var(--transition-slow) ease-out;
}

.animate-slide-in {
    animation: slideIn var(--transition-slow) ease-out;
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Loading spinner */
.spinner {
    width: 1.5rem;
    height: 1.5rem;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Utility classes */
.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;
}

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.line-clamp-1 {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Responsive grid utilities */
.grid-auto-fit {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.grid-auto-fill {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

/* Glass morphism effect */
.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dark .glass {
    background: rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Hover effects */
.hover-lift {
    transition: transform var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-4px);
}

.hover-scale {
    transition: transform var(--transition-normal);
}

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

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

::-webkit-scrollbar-track {
    background: var(--surface-light);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

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