/**
 * NP Edge Standalone - Main Stylesheet
 * Mobile-first responsive design
 */

/* CSS Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-secondary: #10b981;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-gray-50);
    min-height: 100vh;
}

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
}

.mx-auto { margin-left: auto; margin-right: auto; }
.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.py-4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }
.py-8 { padding-top: var(--spacing-8); padding-bottom: var(--spacing-8); }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mt-1 { margin-top: var(--spacing-1); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }

.flex { display: flex; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }

.text-center { text-align: center; }
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }

.font-medium { font-weight: 500; }
.font-bold { font-weight: 700; }

.text-white { color: white; }
.text-gray-500 { color: var(--color-gray-600); }
.text-gray-600 { color: var(--color-gray-600); }
.text-gray-700 { color: var(--color-gray-700); }
.text-gray-900 { color: var(--color-gray-900); }

.w-full { width: 100%; }
.max-w-md { max-width: 28rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-5xl { max-width: 64rem; }
.min-h-screen { min-height: 100vh; }

.space-y-1 > * + * { margin-top: 0.25rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-4 > * + * { margin-top: 1rem; }

.hidden { display: none; }
.block { display: block; }

/* Gradient Backgrounds */
.bg-gradient-to-br {
    background: linear-gradient(to bottom right, var(--from), var(--to));
}

.from-gray-50 { --from: #f9fafb; }
.to-gray-100 { --to: #f3f4f6; }

/* Grid System */
.grid {
    display: grid;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

@media (min-width: 768px) {
    .md\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

/* Header */
.app-header {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 50;
}

/* Card Component */
.card {
    background: white;
    border-radius: 1rem;
    border: 2px solid var(--color-gray-200);
    padding: 1.5rem;
    transition: all 0.2s ease;
}

.card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

/* Tile Variants */
.tile-blue { border-color: #dbeafe; background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%); }
.tile-purple { border-color: #e9d5ff; background: linear-gradient(135deg, #f5f3ff 0%, #ffffff 100%); }
.tile-green { border-color: #d1fae5; background: linear-gradient(135deg, #ecfdf5 0%, #ffffff 100%); }
.tile-orange { border-color: #fed7aa; background: linear-gradient(135deg, #fff7ed 0%, #ffffff 100%); }
.tile-pink { border-color: #fce7f3; background: linear-gradient(135deg, #fdf2f8 0%, #ffffff 100%); }
.tile-indigo { border-color: #e0e7ff; background: linear-gradient(135deg, #eef2ff 0%, #ffffff 100%); }

.tile-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.tile-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 0.25rem;
}

.tile-subtitle {
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    border: 1px solid;
}

.badge-blue { background: #dbeafe; color: #1e40af; border-color: #93c5fd; }
.badge-green { background: #d1fae5; color: #065f46; border-color: #6ee7b7; }
.badge-gray { background: var(--color-gray-200); color: var(--color-gray-700); border-color: var(--color-gray-300); }

/* Input Fields */
.input-field {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-gray-300);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: all 0.2s ease;
}

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

/* Module List */
.module-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.module-card {
    padding: 1.25rem;
    background: white;
    border: 2px solid var(--color-gray-200);
    border-radius: 0.75rem;
    transition: all 0.2s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.module-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.module-icon {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border-radius: 0.5rem;
    margin-bottom: 0.75rem;
}

.module-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: 0.25rem;
}

.module-description {
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

/* Loading Spinner */
.spinner {
    width: 3rem;
    height: 3rem;
    border: 4px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

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

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

/* Department Headers */
.department-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--color-gray-100);
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.department-icon {
    width: 2rem;
    height: 2rem;
}

.department-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
}

/* Responsive */
@media (max-width: 768px) {
    .app-header .flex {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .grid {
        grid-template-columns: 1fr;
    }
}