/**
 * FRAMEWORK CORE CSS
 * ==================
 * Do not modify this file unless you know what you're doing
 * Customize themes in themes.css instead
 */

/* CSS Variables (fallbacks) */
:root {
    --container-width: 1200px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 28px;
    --font-size-2xl: 36px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

/* App Container */
.framework-app {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Loading Screen */
.framework-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    gap: var(--spacing-md);
}

.framework-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-secondary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.framework-loading p {
    color: var(--text-secondary);
    font-size: var(--font-size-md);
}

/* Error Screen */
.framework-error {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    margin: var(--spacing-xl) auto;
    max-width: 500px;
}

.framework-error-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.framework-error h3 {
    color: var(--error-color, #ef4444);
    margin-bottom: var(--spacing-sm);
}

.framework-error p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.framework-error button {
    background: var(--accent-primary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
}

/* Header Section */
.framework-header {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.framework-header h1 {
    font-size: var(--font-size-2xl);
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.framework-header p {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
}

/* Controls Bar */
.framework-controls {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.framework-control-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-secondary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.framework-control-group label {
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.framework-select {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

.framework-select:hover {
    border-color: var(--accent-primary);
}

.framework-btn {
    padding: 8px 20px;
    border: none;
    border-radius: var(--border-radius-sm);
    background: var(--accent-primary);
    color: white;
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition);
}

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

/* Cards Grid */
.framework-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    flex: 1;
}

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* Footer */
.framework-footer {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-xl);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 1024px) {
    .grid-4, .grid-6 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .framework-app { padding: var(--spacing-md); }
    .framework-header h1 { font-size: var(--font-size-xl); }
    .grid-3, .grid-4, .grid-6 { grid-template-columns: repeat(2, 1fr); }
    .framework-controls { flex-direction: column; align-items: stretch; }
    .framework-control-group { justify-content: space-between; }
}

@media (max-width: 480px) {
    .grid-2, .grid-3, .grid-4, .grid-6 { grid-template-columns: 1fr; }
}

/* Utility Classes */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }