/* Main Layout and Structure */

/* Load SF Intellivised font for header */
@font-face {
    font-family: 'SF Intellivised';
    src: url('/fonts/SF Intellivised.ttf') format('truetype');
    font-display: swap;
}

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

body {
    font-family: var(--font-family);
    background: var(--gradient-body);
    min-height: 100vh;
    padding: var(--spacing-lg);
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.header {
    background: var(--gradient-header);
    color: var(--white);
    padding: var(--spacing-xl) var(--spacing-xxl);
    border-bottom: 4px solid var(--primary-color);
}

.header h1 {
    font-family: 'SF Intellivised', var(--font-family);
    font-size: var(--font-size-2xl);
    margin-bottom: 8px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.header p {
    font-size: var(--font-size-lg);
    color: var(--gray-300);
}

.header a {
    color: #3498db;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.header a:hover {
    border-bottom-color: #3498db;
}

.main-content {
    display: grid;
    grid-template-columns: 50% 50%;
    gap: 0;
    min-height: calc(100vh - 200px);
}

.preview-panel {
    background: var(--gray-100);
    padding: var(--spacing-xxl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    border-right: 1px solid var(--gray-200);
}

.preview-container {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 0; /* let the svg occupy full panel */
    display: flex;
    justify-content: center;
    align-items: flex-start;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

#svg-preview {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    border: 2px solid var(--dark-800);
    border-radius: var(--radius-md);
    display: block;
    box-sizing: border-box;
}

/* Ensure inner SVG scales to container and covers (may crop) */
#svg-preview svg {
    width: 100%;
    height: 100%;
    display: block;
}

.controls-panel {
    background: var(--gray-50);
    padding: var(--spacing-xl);
    overflow-y: auto;
}

.control-section {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.control-section h2 {
    font-size: var(--font-size-xl);
    color: var(--dark-900);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.control-section h2::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--primary-color);
    border-radius: var(--radius-sm);
}

/* Responsive: stack panels vertically on narrow viewports */
@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .preview-panel {
        order: 1;
    }

    .controls-panel {
        order: 2;
    }

    .preview-container {
        padding: var(--spacing-lg);
        min-height: 320px;
    }
}