/* ============================================
   Keyboard Crash - Ant Design Inspired Styles
   Mobile-first responsive design
   ============================================ */

/* CSS Custom Properties (Variables) */
:root {
    /* Ant Design Color Palette */
    --primary-color: #1890ff;
    --primary-hover: #40a9ff;
    --primary-active: #096dd9;
    --success-color: #52c41a;
    --warning-color: #faad14;
    --error-color: #ff4d4f;
    
    /* Neutral Colors */
    --text-color: rgba(0, 0, 0, 0.85);
    --text-secondary: rgba(0, 0, 0, 0.65);
    --text-disabled: rgba(0, 0, 0, 0.25);
    --border-color: #d9d9d9;
    --border-hover: #40a9ff;
    --background-color: #f0f2f5;
    --card-background: #ffffff;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --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);
    
    /* Border Radius */
    --border-radius-sm: 2px;
    --border-radius-md: 6px;
    --border-radius-lg: 8px;
    --border-radius-xl: 12px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Transitions */
    --transition-fast: 0.1s ease-in-out;
    --transition-normal: 0.2s ease-in-out;
    --transition-slow: 0.3s ease-in-out;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.5715;
    color: var(--text-color);
    background: var(--background-color);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

/* Page Wrapper */
.page-wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Container */
.container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Hero Card - Ant Design Card Style */
.hero-card {
    background: var(--card-background);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: box-shadow var(--transition-normal);
}

.hero-card:hover {
    box-shadow: var(--shadow-lg);
}

/* Card Header */
.card-header {
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.title i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Card Content */
.card-content {
    padding: var(--spacing-lg);
}

.content-section {
    margin-bottom: var(--spacing-lg);
}

.description {
    font-size: 1.0625rem;
    line-height: 1.6;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
}

.note {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-style: italic;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-color);
    border-left: 3px solid var(--primary-color);
    border-radius: var(--border-radius-sm);
}

/* Blob Figure */
.blob-figure {
    margin: var(--spacing-lg) 0;
    text-align: center;
}

.blob-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-xl);
    transition: transform var(--transition-slow);
}

.blob-image:hover {
    transform: scale(1.02);
}

.blob-caption {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Fallback when image fails to load */
.blob-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--border-radius-xl);
    color: white;
    font-size: 1rem;
    font-weight: 500;
    padding: var(--spacing-lg);
}

.blob-fallback::before {
    content: "Blob animation unavailable";
}

/* Card Footer */
.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--background-color);
    border-top: 1px solid var(--border-color);
}

.status-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

/* Animations */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.1);
    }
}

/* Responsive Design - Mobile First */
@media (max-width: 767px) {
    body {
        padding: var(--spacing-sm);
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .card-header {
        padding: var(--spacing-lg) var(--spacing-md) var(--spacing-sm);
    }
    
    .title {
        font-size: 1.5rem;
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .title i {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .card-content {
        padding: var(--spacing-md);
    }
    
    .description {
        font-size: 1rem;
    }
    
    .blob-figure {
        margin: var(--spacing-md) 0;
    }
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .card-header {
        padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg);
    }
    
    .title {
        font-size: 2.25rem;
    }
}

@media (min-width: 992px) {
    .container {
        max-width: 900px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --text-color: #000000;
        --text-secondary: #333333;
        --border-color: #000000;
    }
}

/* Print styles */
@media print {
    body {
        background: white;
        padding: 0;
    }
    
    .hero-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .blob-image {
        max-width: 300px;
    }
    
    .status-indicator {
        display: none;
    }
}