:root {
    --color-bg: #f5f7fa;
    --color-surface: #ffffff;
    --color-text: #1f2937;
    --color-muted: #6b7280;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-secondary: #6b7280;
    --color-secondary-hover: #4b5563;
    --color-danger: #dc2626;
    --color-success: #16a34a;
    --color-warning: #d97706;
    --border-radius: 0.5rem;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1 0 auto;
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.main-nav .brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav a {
    color: var(--color-muted);
    text-decoration: none;
    font-weight: 500;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
    color: var(--color-primary);
}

.main-nav li > ul li a:hover,
.main-nav li > ul li a[aria-current="page"] {
    color: var(--color-primary);
    background-color: #f8fafc;
}

.main-nav li.has-children>a::after {
    content: '▾';
    display: inline-block;
    margin-left: 0.35rem;
    font-size: 0.75em;
    color: var(--color-muted);
}

/* Desktop: Submenüs bei Hover/Fokus anzeigen */
@media (min-width: 769px) {
    .main-nav > ul {
        display: flex;
        gap: 1rem;
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .main-nav > ul > li {
        position: relative;
    }

    

    .main-nav li > ul {
        display: none;
        position: absolute;
        top: calc(100% + 0.5rem);
        left: 0;
        min-width: 10rem;
        background-color: var(--color-surface);
        border-radius: var(--border-radius);
        /* box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1); */
        padding: 0;
        z-index: 100;
        list-style: none;
        margin: 0;
        text-align: left;
        border: none;
    }

    .main-nav > ul > li > ul::before {
        content: '';
        position: absolute;
        top: -0.5rem;
        left: 0;
        right: 0;
        height: 0.5rem;
    }

    .main-nav li > ul li {
        padding: 0;
        position: relative;
        border: none;
    }

    .main-nav li > ul li a {
        display: block;
        padding: 0.5rem 1rem;
        white-space: nowrap;
        border: none;
        background: transparent;
    }

    .main-nav li > ul li a:hover,
    .main-nav li > ul li a[aria-current="page"] {
        color: var(--color-primary);
        background-color: #f8fafc;
    }

    .main-nav li > ul ul {
        position: static;
        display: none;
        margin: 0;
        padding: 0;
        background: transparent;
        box-shadow: none;
        border-radius: 0;
        border: none;
    }

    .main-nav li > ul li.has-children > ul li a {
        padding-left: 2rem;
    }

    .main-nav li:hover > ul,
    .main-nav li:focus-within > ul {
        display: block;
    }

    .main-nav li > ul li strong {
        display: block;
        font-size: 0.75rem;
        color: var(--color-muted);
        text-transform: uppercase;
        letter-spacing: 0.05em;
        margin-bottom: 0.25rem;
        padding: 0 1rem;
    }
}

/* Mobil: Submenüs per Toggle-Button anzeigen */
@media (max-width: 768px) {
    .main-nav > ul {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }

    .main-nav > ul > li {
        border-bottom: 1px solid #e5e7eb;
        padding: 0.5rem 0;
    }

    .main-nav li > ul {
        display: none;
        list-style: none;
        margin: 0.25rem 0 0 1rem;
        padding: 0;
    }

    .main-nav li.submenu-open > ul {
        display: block;
    }
}

.public-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid #e5e7eb;
    padding: 2rem;
    text-align: center;
}

.public-header h1 {
    margin: 0;
    font-size: 1.75rem;
}

.public-header p {
    margin: 0.5rem 0 0;
    color: var(--color-muted);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(24rem, 1fr));
    gap: 1.5rem;
}

.course-card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.course-image {
    height: 10rem;
    background-color: #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-muted);
    font-size: 0.875rem;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-body {
    padding: 1.25rem;
}

.course-title {
    margin: 0 0 0.25rem;
    font-size: 1.25rem;
}

.course-subtitle {
    margin: 0 0 0.75rem;
    color: var(--color-muted);
    font-size: 0.875rem;
}

.course-description {
    color: var(--color-muted);
    font-size: 0.875rem;
    margin: 0 0 1rem;
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-type {
    background-color: #dbeafe;
    color: #1e40af;
}

.badge-abbreviation {
    background-color: #f3e8ff;
    color: #6b21a8;
}

.badge-units {
    background-color: #ecfdf5;
    color: #065f46;
}

.badge-price {
    background-color: #fff7ed;
    color: #9a3412;
}

.course-dates {
    margin-bottom: 1rem;
}

.course-dates h3 {
    margin: 0 0 0.5rem;
    font-size: 0.875rem;
}

.course-dates ul {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.875rem;
}

.course-dates li {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid #f3f4f6;
}

.course-dates li:last-child {
    border-bottom: none;
}

.status-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
}

.status-planned { background-color: #f3f4f6; color: #374151; }
.status-seats_available { background-color: #dcfce7; color: #166534; }
.status-guaranteed { background-color: #fed7aa; color: #9a4d00; }
.status-fully_booked { background-color: #fee2e2; color: #991b1b; }
.status-cancelled { background-color: #fef3c7; color: #92400e; }

.status-seats_available.status-guaranteed-variant,
.status-seats_available.status-guaranteed-variant {
    background-color: #fed7aa;
    color: #9a4d00;
}

.button {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background-color: var(--color-primary);
    color: #ffffff;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
}

.button:hover {
    background-color: var(--color-primary-hover);
}

.button-secondary {
    background-color: var(--color-secondary);
}

.button-secondary:hover {
    background-color: var(--color-secondary-hover);
}

.button-small {
    padding: 0.375rem 0.5rem;
    font-size: 0.75rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid #d1d5db;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-weight: normal;
    cursor: pointer;
}

.checkbox-label input {
    width: auto;
    margin-top: 0.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    gap: 1rem;
}

.success-message,
.error-message {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.success-message {
    background-color: #f0fdf4;
    color: var(--color-success);
}

.error-message {
    background-color: #fef2f2;
    color: var(--color-danger);
}

.info-box {
    background-color: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
    color: #1e40af;
}

.course-title a {
    color: inherit;
    text-decoration: none;
}

.course-title a:hover {
    color: var(--color-primary);
}

.course-image {
    text-decoration: none;
}

.course-detail {
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.course-detail-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 2fr;
    gap: 1.5rem;
    padding: 1.5rem;
    border-bottom: 1px solid #f3f4f6;
}

.course-detail-image {
    min-height: 12rem;
    background-color: #e5e7eb;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.course-detail-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-detail-intro h1 {
    margin: 0 0 0.5rem;
    font-size: 1.75rem;
}

.course-detail-body {
    padding: 1.5rem;
}

.course-section {
    margin-bottom: 1.5rem;
}

.course-section h2 {
    margin: 0 0 0.5rem;
    font-size: 1.125rem;
}

.course-section ul {
    margin: 0;
    padding-left: 1.25rem;
}

.course-detail-actions {
    background-color: #f9fafb;
    padding: 1.5rem;
    border-top: 1px solid #f3f4f6;
}

.course-detail-actions h2 {
    margin: 0 0 1rem;
    font-size: 1.125rem;
}

.course-date-form {
    max-width: 40rem;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

@media (max-width: 640px) {
    .course-detail-header {
        grid-template-columns: 1fr;
    }
}

.search-section {
    margin-bottom: 1.5rem;
}

.search-form {
    display: flex;
    gap: 0.5rem;
    max-width: 40rem;
}

.search-form-large {
    margin: 1.5rem auto;
    justify-content: center;
}

.search-input {
    flex: 1 1 auto;
    padding: 0.625rem;
    border: 1px solid #d1d5db;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
}

.search-input:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}

.search-results-info {
    color: var(--color-muted);
    margin-bottom: 1rem;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Kursdetailseite – erweitertes Layout */
.course-detail-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 2fr minmax(0, 18rem);
    gap: 2rem;
    padding: 1.5rem;
    border-bottom: 1px solid #f3f4f6;
    align-items: start;
}

.course-detail-intro h1 {
    margin: 0 0 0.5rem;
    font-size: 1.75rem;
    color: #1857a4;
}

.course-detail-intro .course-subtitle {
    margin: 0 0 1rem;
    color: var(--color-muted);
    font-size: 1rem;
}

.course-date-selection {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e5e7eb;
}

.course-date-selection .course-date-form {
    max-width: 24rem;
}

.course-status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.status-circles {
    display: flex;
    gap: 0.375rem;
}

.status-circle {
    display: block;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background-color: #e5e7eb;
    border: 1px solid #d1d5db;
}

.status-circle.is-active[data-state="seats_available"] {
    background-color: #28a745;
    border-color: #28a745;
}

.status-circle.is-active[data-state="guaranteed"] {
    background-color: #fd7e14;
    border-color: #fd7e14;
}

.status-circle.is-active[data-state="fully_booked"] {
    background-color: #dc3545;
    border-color: #dc3545;
}

.status-label {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text);
}

.status-label.status-seats_available {
    background-color: #dcfce7;
    color: #166534;
}

.status-label.status-guaranteed-variant {
    background-color: #fed7aa;
    color: #9a4d00;
}

.status-label.status-fully_booked {
    background-color: #fee2e2;
    color: #991b1b;
}

.course-schedule-text {
    margin-top: 1rem;
    color: var(--color-muted);
    font-size: 0.9375rem;
}

.course-detail-info {
    margin-top: 1.5rem;
}

.course-detail-info p {
    margin: 0 0 0.75rem;
    color: var(--color-text);
}

.course-detail-info strong {
    display: block;
    color: var(--color-muted);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.125rem;
}

.course-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1857a4;
}

.course-price-note {
    font-size: 0.75rem;
    color: var(--color-muted);
}

.course-detail-links {
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 1rem;
}

.action-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.action-links li {
    border-bottom: 1px solid #e5e7eb;
}

.action-links li:last-child {
    border-bottom: none;
}

.action-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 0.5rem;
    color: #1857a4;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
}

.action-link:hover {
    color: #124285;
    text-decoration: underline;
}

.action-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    border: 1px solid #1857a4;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.course-detail-booking-bar {
    padding: 1rem 1.5rem;
    background-color: #f9fafb;
    border-bottom: 1px solid #f3f4f6;
}

.course-detail-booking-bar .form-actions {
    margin-top: 0;
}

.course-detail-booking-bar .button {
    background-color: #c8102e;
}

.course-detail-booking-bar .button:hover {
    background-color: #a00d25;
}

/* Anfrageformular */
.inquiry-course-summary {
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

.inquiry-course-summary p {
    margin: 0;
    color: var(--color-text);
}

.inquiry-course-summary strong {
    color: var(--color-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.radio-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(6rem, 1fr));
    gap: 0.75rem;
}

.radio-card {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background-color: #f8f9fa;
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
}

.radio-card:hover {
    border-color: #bfdbfe;
}

.radio-card input {
    width: auto;
    margin: 0;
}

.field-optional {
    color: var(--color-muted);
    font-size: 0.75rem;
    font-weight: 400;
    float: right;
}

@media (max-width: 960px) {
    .course-detail-header {
        grid-template-columns: minmax(0, 1fr) 2fr;
    }

    .course-detail-links {
        grid-column: 1 / -1;
    }
}

@media (max-width: 640px) {
    .course-detail-header {
        grid-template-columns: 1fr;
    }

    .course-detail-booking-bar .form-actions {
        flex-direction: column;
    }

    .course-detail-booking-bar .form-actions .button,
    .course-detail-booking-bar .form-actions .button-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* Footer */
.site-footer {
    background-color: var(--color-surface);
    border-top: 1px solid #e5e7eb;
    padding: 1.5rem 2rem;
    margin-top: auto;
    text-align: center;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    list-style: none;
    margin: 0 0 0.75rem;
    padding: 0;
}

.footer-nav a {
    color: var(--color-muted);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
}

.footer-nav a:hover,
.footer-nav a[aria-current="page"] {
    color: var(--color-primary);
    text-decoration: underline;
}

.footer-copy {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.75rem;
}

/* Rechtstexte */
.legal-page section,
.contact-page section {
    margin-bottom: 1.5rem;
}

.legal-page h2,
.contact-page h2 {
    margin: 1.5rem 0 0.5rem;
    font-size: 1.125rem;
}

.legal-page p,
.contact-page p {
    margin: 0 0 0.75rem;
}