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

/* CSS Variables */
:root {
    /* Primary Brand Colors */
    --color-primary: #eb690b;
    --color-primary-hover: #d05a08;
    --color-primary-light: #ffa46354;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --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-900: #111827;
    
    /* Typography */
    --font-family-primary: Arial, Sans;
    --font-size-base: 14px;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    /* Shadows */
    --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);
}

/* Base Styles */
body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    color: var(--color-gray-900);
    background-color: var(--color-gray-100);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

/* Header */
.header {
    background: var(--color-white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--color-gray-300);
}

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

.logo {
    height: 48px;
    width: auto;
    flex-shrink: 0;
}

.header-divider {
    width: 1px;
    height: 48px;
    background: var(--color-gray-300);
    flex-shrink: 0;
}

.header-text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.header-text h1 {
    font-size: 1.4rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin: 0;
}

.header-subtitle {
    font-size: 0.8rem;
    color: var(--color-gray-600);
    margin: 0;
    font-weight: var(--font-weight-normal);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

.lang-btn {
    background: none;
    border: none;
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    font-family: inherit;
}

.lang-btn.active {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.lang-divider {
    color: var(--color-gray-400);
    font-size: 0.9rem;
    user-select: none;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-lg) 0;
}

/* Section */
.section {
    margin-bottom: 1.75rem;
}

.section-header {
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-gray-300);
}

.section-title {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-700);
    margin-bottom: 0.25rem;
}

.section-description {
    color: var(--color-gray-600);
    font-size: 0.8rem;
}

/* App Grid */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 0.75rem;
}

/* App Card */
.app-card {
    background-color: var(--color-white);
    border-radius: var(--radius-sm);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 1.125rem;
    transition: box-shadow 0.2s ease;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--color-gray-200);
}

.app-card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    border-color: var(--color-gray-300);
}

.app-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.625rem;
}

.app-icon {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    background: var(--color-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-hover);
    font-size: 0.8rem;
    font-weight: var(--font-weight-semibold);
    flex-shrink: 0;
    text-transform: uppercase;
}

.app-card-title {
    font-size: 0.95rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin: 0;
}

.app-card-description {
    color: var(--color-gray-600);
    font-size: 0.8rem;
    line-height: 1.4;
    flex-grow: 1;
    margin-bottom: var(--spacing-xs);
}

.app-card-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--color-gray-200);
}

.app-card-link {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    font-size: 0.8rem;
}

.app-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-top: var(--spacing-xs);
    margin-bottom: 5px;
}

.app-tag {
    background-color: var(--color-gray-200);
    color: var(--color-gray-600);
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: var(--font-weight-normal);
}

/* Footer */
.footer {
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-300);
    padding: var(--spacing-md) 0;
    margin-top: auto;
}

.footer p {
    text-align: center;
    color: var(--color-gray-600);
    font-size: 0.85rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-gray-600);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state-message {
    font-size: 1.1rem;
}

/* Loading State */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-gray-600);
}

.loading-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        gap: var(--spacing-sm);
    }
    
    .logo {
        height: 38px;
    }
    
    .header-divider {
        height: 38px;
    }
    
    .header-text h1 {
        font-size: 1.15rem;
    }
    
    .header-subtitle {
        font-size: 0.7rem;
    }
    
    .language-switcher {
        gap: 0.35rem;
    }
    
    .lang-btn {
        font-size: 0.85rem;
        padding: 0.2rem 0.4rem;
    }
    
    .app-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .header-content {
        flex-wrap: wrap;
    }
    
    .header-subtitle {
        display: none;
    }
    
    .language-switcher {
        order: -1;
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .main-content {
        padding: var(--spacing-lg) 0;
    }
    
    .section {
        margin-bottom: var(--spacing-lg);
    }
}