/**
 * Learnature-ly Apps Dashboard
 * Modern, responsive CSS
 */

/* ========================================
   CSS Variables
   ======================================== */
:root {
    /* Colors */
    --color-primary: #4A90E2;
    --color-primary-dark: #357ABD;
    --color-secondary: #50E3C2;
    --color-accent: #F5A623;
    --color-background: #F8F9FA;
    --color-surface: #FFFFFF;
    --color-text: #2C3E50;
    --color-text-light: #6C757D;
    --color-border: #E9ECEF;
    --color-success: #28A745;
    --color-warning: #FFC107;
    --color-info: #17A2B8;

    /* Category Colors */
    --color-finance: #28A745;
    --color-education: #4A90E2;
    --color-ai: #9B59B6;
    --color-ordering: #F5A623;
    --color-resources: #E74C3C;

    /* Typography */
    --font-heading: 'Inter', 'Segoe UI', sans-serif;
    --font-body: 'Open Sans', system-ui, sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ========================================
   Reset & Base
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* ========================================
   Header
   ======================================== */
.main-header {
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
}

.main-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    font-weight: 500;
    color: var(--color-text-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: rgba(74, 144, 226, 0.1);
}

.btn-login {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.btn-login:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
}

/* ========================================
   Search Section
   ======================================== */
.search-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-left: 3rem;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-background);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-surface);
    box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.1);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-light);
}

/* ========================================
   Featured Section (Skills Map)
   ======================================== */
.featured-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.featured-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.featured-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    pointer-events: none;
}

.featured-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.featured-icon {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.featured-content h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.featured-content p {
    opacity: 0.9;
    margin-bottom: var(--spacing-md);
}

.featured-cta {
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.featured-cta .arrow {
    transition: transform var(--transition-fast);
}

.featured-card:hover .featured-cta .arrow {
    transform: translateX(4px);
}

.featured-badge {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ========================================
   Filters Section
   ======================================== */
.filters-section {
    padding: var(--spacing-lg) var(--spacing-lg);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.filters-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: var(--spacing-sm);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
    -webkit-overflow-scrolling: touch;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-background);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-light);
    white-space: nowrap;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.filter-btn:hover {
    background: var(--color-surface);
    border-color: var(--color-border);
}

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

.filter-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.filter-btn.active .filter-icon {
    background: rgba(255, 255, 255, 0.2);
}

.filter-count {
    background: rgba(0, 0, 0, 0.1);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.filter-btn.active .filter-count {
    background: rgba(255, 255, 255, 0.2);
}

/* ========================================
   Apps Grid
   ======================================== */
.apps-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    min-height: 400px;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

/* App Card */
.app-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

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

.app-card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.app-logo {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    object-fit: cover;
    background: var(--color-background);
    flex-shrink: 0;
}

.app-logo-placeholder {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.app-logo-placeholder.finance { background: var(--color-finance); }
.app-logo-placeholder.education { background: var(--color-education); }
.app-logo-placeholder.ai { background: var(--color-ai); }
.app-logo-placeholder.ordering { background: var(--color-ordering); }
.app-logo-placeholder.resources { background: var(--color-resources); }

.app-info {
    flex: 1;
}

.app-name {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.app-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.app-category.finance { background: rgba(40, 167, 69, 0.1); color: var(--color-finance); }
.app-category.education { background: rgba(74, 144, 226, 0.1); color: var(--color-education); }
.app-category.ai { background: rgba(155, 89, 182, 0.1); color: var(--color-ai); }
.app-category.ordering { background: rgba(245, 166, 35, 0.1); color: var(--color-ordering); }
.app-category.resources { background: rgba(231, 76, 60, 0.1); color: var(--color-resources); }

.app-description {
    color: var(--color-text-light);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-lg);
    flex: 1;
    line-height: 1.5;
}

.app-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.app-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8125rem;
    font-weight: 500;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-dot.available { background: var(--color-success); }
.status-dot.development { background: var(--color-warning); }
.status-dot.planned { background: var(--color-info); }

.app-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

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

.app-btn.primary:hover {
    background: var(--color-primary-dark);
}

.app-btn.secondary {
    background: var(--color-background);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

/* No Results */
.no-results {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-light);
}

.no-results svg {
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.no-results h3 {
    font-family: var(--font-heading);
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   Coming Soon Section
   ======================================== */
.coming-soon-section {
    background: var(--color-surface);
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.coming-soon-section h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.coming-soon-section > p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.coming-soon-list {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.coming-soon-item {
    background: var(--color-background);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* ========================================
   Footer
   ======================================== */
.main-footer {
    background: var(--color-text);
    color: white;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xl);
}

.footer-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
}

.footer-links h4,
.footer-apps h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.footer-links a,
.footer-apps a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-xs) 0;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-apps a:hover {
    color: white;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .footer-container {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-wrap: wrap;
    }

    .main-nav {
        order: 3;
        width: 100%;
        justify-content: center;
        padding-top: var(--spacing-md);
        border-top: 1px solid var(--color-border);
        margin-top: var(--spacing-md);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .featured-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-lg);
    }

    .featured-badge {
        position: static;
        margin-top: var(--spacing-md);
    }

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

    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links,
    .footer-apps {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.75rem;
    }

    .logo-text {
        display: none;
    }

    .filter-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8125rem;
    }
}

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

.app-card {
    animation: fadeIn var(--transition-normal) ease;
}

/* Stagger animation for cards */
.app-card:nth-child(1) { animation-delay: 0ms; }
.app-card:nth-child(2) { animation-delay: 50ms; }
.app-card:nth-child(3) { animation-delay: 100ms; }
.app-card:nth-child(4) { animation-delay: 150ms; }
.app-card:nth-child(5) { animation-delay: 200ms; }
.app-card:nth-child(6) { animation-delay: 250ms; }