/**
 * Global Page Header Styles
 * Reusable header components for all pages
 * 
 * Usage:
 * - .page-header-container: Main container
 * - .page-header-title: Main title
 * - .page-header-subtitle: Optional subtitle
 * - .page-header-actions: Action buttons area
 */

/* Page Header Container */
.page-header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--color-link);
}

.page-header-content {
    flex: 1;
}

.page-header-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

.page-header-subtitle {
    margin: 0.5rem 0 0 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-weight: 400;
}

.page-header-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: center;
}

/* Centered Header Variant */
.page-header-center,
.page-header-centered {
    flex-direction: column;
    text-align: center;
    align-items: center;
}

.page-header-center .page-header-content,
.page-header-centered .page-header-content {
    text-align: center;
}

.page-header-center .page-header-actions,
.page-header-centered .page-header-actions {
    margin-top: 1.5rem;
    justify-content: center;
}

/* Simple Header (No background) */
.page-header-simple {
    background: none;
    border-left: none;
    border-bottom: 2px solid var(--color-border);
    border-radius: 0;
    padding: 1.5rem 0;
}

/* Compact Header */
.page-header-compact {
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
}

.page-header-compact .page-header-title {
    font-size: 1.5rem;
}

.page-header-compact .page-header-subtitle {
    font-size: 0.875rem;
}

/* Header with Icon */
.page-header-with-icon {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.page-header-icon {
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-link);
    color: var(--color-on-brand);
    border-radius: var(--radius-md);
    font-size: 1.5rem;
}

/* Breadcrumb in Header */
.page-header-breadcrumb {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.page-header-breadcrumb a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

.page-header-breadcrumb a:hover {
    color: var(--color-link);
}

.page-header-breadcrumb-separator {
    color: var(--color-text-muted);
}

/* Header Status Badge */
.page-header-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    margin-left: 1rem;
}

.page-header-badge-success {
    background-color: var(--color-success-bg);
    color: var(--color-success-text);
}

.page-header-badge-warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning-text);
}

.page-header-badge-danger {
    background-color: var(--color-danger-bg);
    color: var(--color-danger-text);
}

.page-header-badge-info {
    background-color: var(--color-info-bg);
    color: var(--color-info-text);
}

/* ── Toolbar layout — compact header for list pages ─────────────────────── */
/*
 * Usage: replace .page-header-container on list pages that need
 *        title + search + action-button in one horizontal row.
 */
.page-header-toolbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 0 1.25rem;
    margin-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-link);
    flex-wrap: nowrap;
}

.page-header-toolbar-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-link);
    white-space: nowrap;
    flex-shrink: 0;
}

.page-header-toolbar-heading {
    min-width: 0;
    flex: 1 1 auto;
}

.page-header-toolbar-subtitle {
    margin: 0.35rem 0 0 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.page-header-toolbar-search {
    flex: 1;
    min-width: 0;
}

/* Override search-form max-width when inside toolbar */
.page-header-toolbar .search-form {
    max-width: 100%;
}

.page-header-toolbar-actions {
    flex-shrink: 0;
    display: flex;
    gap: 0.5rem;
    align-items: center;
    min-width: fit-content;
}

/* ── Course detail — one-line header inside .page-header-toolbar ─────────── */
.course-header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.course-back-arrow {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 1.1rem;
    line-height: 1;
    transition: color 0.2s ease;
}

.course-back-arrow:hover {
    color: var(--color-link);
}

.course-header-date {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-weight: 500;
    white-space: nowrap;
}

[data-theme="dark"] .page-header-container,
[data-theme="dark"] .page-header-toolbar {
    border-bottom-color: var(--color-border);
}

[data-theme="dark"] .page-header-toolbar-title {
    color: var(--color-text);
}

[data-theme="dark"] .page-header-icon {
    background: var(--color-surface-muted);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

/* Mobile — toolbar + course header */
@media (max-width: 767px) {
    /* Toolbar: wrap everything */
    .page-header-toolbar {
        flex-wrap: wrap;
        padding: 1rem 0;
    }

    /* Title: shares row 1 with actions/filters, grows to fill available space */
    .page-header-toolbar-title {
        font-size: 1.25rem;
        flex: 1;
        min-width: 0;
    }

    .page-header-toolbar-heading {
        flex: 1;
        min-width: 0;
    }

    .page-header-toolbar-subtitle {
        font-size: 0.8rem;
    }

    /* Actions: stay on row 1 next to title */
    .page-header-toolbar-actions {
        order: 10;
        width: 100%;
        flex-basis: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .page-header-toolbar-actions .btn {
        min-width: max-content;
    }

    /* Search: own full-width row below title+actions */
    .page-header-toolbar-search {
        order: 9;
        width: 100%;
        flex-basis: 100%;
    }

    /* Course detail: shrink so badge + date + Aktionen all sit on one line */
    .course-header-left {
        flex: 1;
        min-width: 0;
        flex-wrap: nowrap;
        gap: 0.4rem;
    }

    .course-header-date {
        font-size: 0.8rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* Action menu stays on the right of the same row */
    .page-header-toolbar .action-menu {
        flex-shrink: 0;
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .page-header-container {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
        gap: 1rem;
    }
    
    .page-header-title {
        font-size: 1.25rem;
    }
    
    .page-header-subtitle {
        font-size: 0.8125rem;
    }
    
    .page-header-actions {
        width: 100%;
        justify-content: flex-start;
    }
    
    .page-header-icon {
        width: 2.25rem;
        height: 2.25rem;
        font-size: 1.125rem;
    }
    
    .page-header-compact {
        padding: 0.875rem;
    }
    
    .page-header-badge {
        display: block;
        margin-left: 0;
        margin-top: 0.5rem;
        width: fit-content;
    }
}

@media (max-width: 480px) {
    .page-header-container {
        padding: 0.875rem;
    }
    
    .page-header-title {
        font-size: 1.125rem;
    }
    
    .page-header-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .page-header-actions .btn {
        width: 100%;
    }
}