/* /assets/css/registration-theme.css */

/*
 * Gemeinsames, rein optisches Theme fuer alle Registrierungsseiten. Wird direkt
 * nach Bootstrap und vor den seitenspezifischen Stylesheets eingebunden, damit
 * die Seiten-CSS (Sichtbarkeits-Toggles, Projektseite usw.) weiterhin gewinnen.
 * Es aendert kein Markup und kein Verhalten - nur Farben, Abstaende, Radien.
 * Bewusst ohne Webfonts (kein Google-Fonts-Request aus DSGVO-Gruenden).
 */

:root {
    --rt-accent: #2563eb;
    --rt-accent-rgb: 37, 99, 235;
    --rt-accent-hover: #1d4ed8;
    --rt-accent-active: #1e40af;
    --rt-ink: #0f172a;
    --rt-muted: #64748b;
    --rt-line: #e2e8f0;
    --rt-surface: #ffffff;
    --rt-canvas: #f6f8fb;
    --rt-radius: 0.75rem;
    --rt-radius-lg: 1.25rem;
    --rt-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px -6px rgba(15, 23, 42, 0.08);

    --bs-body-font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --bs-body-color: var(--rt-ink);
    --bs-body-color-rgb: 15, 23, 42;
    --bs-heading-color: var(--rt-ink);
    --bs-secondary-color: var(--rt-muted);
    --bs-border-color: var(--rt-line);
    --bs-border-radius: var(--rt-radius);
    --bs-border-radius-lg: var(--rt-radius-lg);
    --bs-primary: var(--rt-accent);
    --bs-primary-rgb: var(--rt-accent-rgb);
    --bs-link-color: var(--rt-accent);
    --bs-link-color-rgb: var(--rt-accent-rgb);
    --bs-link-hover-color: var(--rt-accent-hover);
    --bs-link-hover-color-rgb: 29, 78, 216;
    --bs-tertiary-bg: var(--rt-canvas);
    --bs-tertiary-bg-rgb: 246, 248, 251;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(60rem 30rem at 50% -10rem, rgba(var(--rt-accent-rgb), 0.08), transparent 70%),
        var(--rt-canvas) !important;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

main {
    max-width: 1120px;
    margin-inline: auto;
}

a {
    text-underline-offset: 0.2em;
}

/* Kopfbereich */

main > form > .py-5.text-center,
main > .py-5.text-center {
    max-width: 720px;
    margin-inline: auto;
    padding-top: 3.5rem !important;
    padding-bottom: 2.5rem !important;
}

main .py-5.text-center h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 0.75rem;
}

main .py-5.text-center .lead {
    color: var(--rt-muted);
    font-size: 1.125rem;
    line-height: 1.6;
}

/* Inhaltsspalten als Karten. Der Hintergrund liegt auf einem Pseudo-Element
   innerhalb des Gutters, damit das Bootstrap-Grid unveraendert bleibt. */

main .row.g-5 > [class*="col-"]:not(:has(> .card)) {
    position: relative;
    isolation: isolate;
    padding: 2rem calc(var(--bs-gutter-x) * 0.5 + 1.25rem);
}

main .row.g-5 > [class*="col-"]:not(:has(> .card))::before {
    content: "";
    position: absolute;
    inset: 0 calc(var(--bs-gutter-x) * 0.5);
    z-index: -1;
    background: var(--rt-surface);
    border: 1px solid var(--rt-line);
    border-radius: var(--rt-radius-lg);
    box-shadow: var(--rt-shadow);
}

@media (min-width: 768px) {
    main .row.g-5 > [class*="col-"]:not(:has(> .card)) {
        padding: 2.5rem calc(var(--bs-gutter-x) * 0.5 + 2.25rem);
    }

    main .row.g-5 > .order-md-last {
        position: sticky;
        top: 1.5rem;
        align-self: flex-start;
        padding-inline: calc(var(--bs-gutter-x) * 0.5 + 1.5rem) !important;
        padding-block: 1.75rem !important;
    }
}

@media (max-width: 575.98px) {
    main .row.g-5 {
        --bs-gutter-x: 1rem;
        --bs-gutter-y: 1.25rem;
    }

    main .row.g-5 > [class*="col-"]:not(:has(> .card)) {
        padding: 1.5rem calc(var(--bs-gutter-x) * 0.5 + 1.25rem);
    }
}

/* Ueberschriften und Trenner */

main h4 {
    font-size: 1.125rem;
    font-weight: 650;
    letter-spacing: -0.01em;
}

main h6 {
    font-weight: 600;
}

main hr.my-4 {
    margin-block: 2rem !important;
    border-color: var(--rt-line);
    opacity: 1;
}

/* Formularfelder */

.form-label {
    font-size: 0.875rem;
    font-weight: 550;
    color: #334155;
    margin-bottom: 0.4rem;
}

.form-control,
.form-select {
    padding: 0.625rem 0.875rem;
    border-color: #cbd5e1;
    border-radius: 0.625rem;
    background-color: var(--rt-surface);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-select {
    padding-right: 2.25rem;
}

.form-control::placeholder {
    color: #94a3b8;
}

.form-control:hover,
.form-select:hover {
    border-color: #94a3b8;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--rt-accent);
    box-shadow: 0 0 0 4px rgba(var(--rt-accent-rgb), 0.15);
}

.form-control:disabled,
.form-control[readonly] {
    background-color: #f1f5f9;
}

.input-group-text {
    background-color: #f8fafc;
    border-color: #cbd5e1;
    color: var(--rt-muted);
    border-radius: 0.625rem;
}

.form-text {
    color: var(--rt-muted);
    font-size: 0.8125rem;
}

/* Checkboxen und Radios */

.form-check {
    padding-left: 1.875rem;
    margin-bottom: 0.625rem;
}

.form-check .form-check-input {
    margin-left: -1.875rem;
    width: 1.125rem;
    height: 1.125rem;
    margin-top: 0.2rem;
    border-color: #94a3b8;
    cursor: pointer;
}

.form-check-input[type="checkbox"] {
    border-radius: 0.3rem;
}

.form-check-input:checked {
    background-color: var(--rt-accent);
    border-color: var(--rt-accent);
}

.form-check-input:focus {
    border-color: var(--rt-accent);
    box-shadow: 0 0 0 4px rgba(var(--rt-accent-rgb), 0.15);
}

.form-check-label {
    cursor: pointer;
    line-height: 1.5;
}

/* Buttons */

.btn {
    border-radius: 0.625rem;
    font-weight: 600;
    transition: background-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 1.0625rem;
    border-radius: 0.75rem;
}

.btn-primary {
    --bs-btn-bg: var(--rt-accent);
    --bs-btn-border-color: var(--rt-accent);
    --bs-btn-hover-bg: var(--rt-accent-hover);
    --bs-btn-hover-border-color: var(--rt-accent-hover);
    --bs-btn-active-bg: var(--rt-accent-active);
    --bs-btn-active-border-color: var(--rt-accent-active);
    --bs-btn-disabled-bg: var(--rt-accent);
    --bs-btn-disabled-border-color: var(--rt-accent);
    --bs-btn-focus-shadow-rgb: var(--rt-accent-rgb);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08), 0 6px 16px -4px rgba(var(--rt-accent-rgb), 0.45);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08), 0 10px 20px -6px rgba(var(--rt-accent-rgb), 0.55);
}

.btn-primary:active {
    transform: none;
}

/* Zusammenfassung (Deine Auswahl) */

.list-group {
    --bs-list-group-border-color: var(--rt-line);
    --bs-list-group-border-radius: var(--rt-radius);
}

.list-group-item {
    padding: 0.875rem 1rem;
}

.list-group-item h6 {
    margin-bottom: 0.2rem !important;
}

/* In der Auswahl-Karte keine Karte-in-Karte: Liste ohne eigenen Rahmen */
main .row.g-5 > .order-md-last .list-group {
    --bs-list-group-bg: transparent;
    border-radius: 0;
}

main .row.g-5 > .order-md-last .list-group-item {
    padding-inline: 0;
    border-width: 0 0 1px;
    border-radius: 0;
}

main .row.g-5 > .order-md-last .list-group-item:last-child {
    border-bottom-width: 0;
}

/* Hinweise */

.alert {
    border: 0;
    border-radius: var(--rt-radius);
    padding: 1rem 1.25rem;
    box-shadow: inset 4px 0 0 currentColor;
}

/* Footer */

footer.text-small {
    font-size: 0.8125rem;
    margin-top: 3rem !important;
    padding-top: 2rem !important;
    border-top: 1px solid var(--rt-line);
}

footer .list-inline-item:not(:last-child) {
    margin-right: 1rem;
}

footer a {
    color: var(--rt-muted);
    text-decoration: none;
}

footer a:hover {
    color: var(--rt-ink);
    text-decoration: underline;
}

@media (prefers-reduced-motion: reduce) {
    .btn,
    .form-control,
    .form-select {
        transition: none;
    }

    .btn-primary:hover {
        transform: none;
    }
}