/* TU Braunschweig inspired survey interface */

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

:root {
    --tu-red: #be1e3c;
    --tu-red-dark: #8f152d;
    --tu-red-soft: #f7e8ec;
    --tu-black: #000000;
    --tu-white: #ffffff;
    --ink: #191919;
    --muted: #5f5f5f;
    --surface: #ffffff;
    --surface-muted: #f4f4f4;
    --surface-red: #fff7f8;
    --border: #d8d8d8;
    --success: #0f7a48;
    --warning: #b26a00;
    --danger: #be1e3c;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 18px 45px rgba(0, 0, 0, 0.12);
    --radius: 8px;
}

html {
    background: var(--tu-black);
    transform: scale(0.8);
    transform-origin: top left; /* Verankert das Layout oben links */
    width: 125%; /* Kompensiert die 80% Breite (100 / 0.8) */
    height: 125%; /* Kompensiert die 80% Höhe, verhindert Scrollbalken unten */
    overflow-x: hidden; /* Sicherung gegen horizontale Scrollbalken */
}

body {
    min-height: 125%;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
    background:
        linear-gradient(90deg, rgba(190, 30, 60, 0.08) 0 1px, transparent 1px 100%),
        linear-gradient(180deg, #ffffff 0, #f3f3f3 58%, #ededed 100%);
    background-size: 88px 88px, auto;
    color: var(--ink);
    line-height: 1.55;
    display: flex;
    flex-direction: column;
}

a {
    color: inherit;
}

.container {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 24px 0 0;
    flex: 1;
}

header {
    position: relative;
    display: grid;
    grid-template-columns: minmax(240px, 28%) 1fr;
    min-height: 80px;
    margin-bottom: 34px;
    overflow: hidden;
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-lg);
}

header::before {
    content: "";
    position: absolute;
    inset: 0;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: inherit;
    pointer-events: none;
}

.brand-panel {
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 14px 20px;
    background: var(--surface);
}

.tu-logo {
    display: block;
    width: min(198px, 100%);
    height: auto;
}

.hero-panel {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    padding: 12px 24px 12px 20px;
    background:
        linear-gradient(90deg, rgba(190, 30, 60, 0.06), transparent 48%),
        var(--surface);
}

header h1 {
    max-width: 820px;
    color: var(--tu-black);
    font-size: clamp(1.1rem, 2.5vw, 2rem);
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: 0;
}

header .subtitle {
    max-width: 720px;
    color: var(--muted);
    font-size: 0.85rem;
}

main {
    min-height: 55vh;
}

.progress-bar {
    height: 10px;
    overflow: hidden;
    margin-bottom: 10px;
    border-radius: 999px;
    background: #dedede;
    border: 1px solid #cfcfcf;
}

.progress-fill {
    height: 100%;
    background: var(--tu-red);
    transition: width 0.25s ease;
}

.progress-text {
    margin-bottom: 18px;
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 700;
}

.welcome-section,
.survey-section,
.thankyou-section {
    max-width: 940px;
    margin: 0 auto;
}

.welcome-card,
.survey-form,
.thankyou-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.welcome-card {
    padding: clamp(28px, 5vw, 52px);
}

.welcome-card h2,
.survey-form h2,
.thankyou-card h2 {
    color: var(--tu-black);
    font-size: clamp(1.8rem, 3vw, 2.65rem);
    line-height: 1.08;
    margin-bottom: 16px;
    letter-spacing: 0;
}

.intro-text,
.section-description,
.thankyou-text {
    max-width: 760px;
    color: var(--muted);
    font-size: 1.08rem;
    line-height: 1.7;
}

.intro-text {
    margin-bottom: 30px;
}

.info-box {
    position: relative;
    padding: 22px 24px 22px 28px;
    margin-bottom: 18px;
    border: 1px solid var(--border);
    border-left: 8px solid var(--tu-red);
    border-radius: var(--radius);
    background: var(--surface-muted);
}

.info-box h3 {
    margin-bottom: 10px;
    color: var(--tu-black);
    font-size: 1.05rem;
    letter-spacing: 0;
}

.info-box p {
    color: var(--muted);
}

.info-box ul {
    list-style: none;
}

.info-box li {
    position: relative;
    padding: 8px 0 8px 26px;
}

.info-box li::before {
    content: "";
    position: absolute;
    top: 1.05rem;
    left: 2px;
    width: 10px;
    height: 10px;
    background: var(--tu-red);
}

.survey-form {
    padding: clamp(26px, 4vw, 44px);
}

.section-description {
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 9px;
    color: var(--tu-black);
    font-weight: 700;
}

.form-group select,
.form-group input[type="number"] {
    width: 100%;
    min-height: 48px;
    padding: 12px 15px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--tu-white);
    color: var(--ink);
    font: inherit;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: var(--tu-red);
    box-shadow: 0 0 0 4px rgba(190, 30, 60, 0.14);
}

.form-group small {
    display: block;
    margin-top: 7px;
    color: var(--muted);
    font-size: 0.9rem;
}

.likert-group {
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-muted);
}

.likert-group:last-of-type {
    margin-bottom: 0;
}

.likert-scale {
    display: grid;
    grid-template-columns: repeat(var(--likert-count, 5), minmax(0, 1fr));
    gap: 10px;
    margin-top: 16px;
}

.likert-option {
    min-width: 0;
    text-align: center;
}

.likert-option input[type="radio"],
.choice-card input[type="radio"] {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.likert-option label {
    display: flex;
    min-height: 88px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 12px 8px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    background: var(--tu-white);
    transition: border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.likert-option label:hover,
.likert-option input[type="radio"]:focus + label {
    border-color: var(--tu-red);
    box-shadow: 0 0 0 4px rgba(190, 30, 60, 0.12);
}

.likert-option input[type="radio"]:checked + label {
    border-color: var(--tu-red);
    background: var(--surface-red);
}

.likert-label {
    color: var(--muted);
    font-size: 0.72rem;
    line-height: 1.15;
}

.likert-number {
    color: var(--tu-black);
    font-size: 1.5rem;
    font-weight: 700;
}

.choice-section {
    max-width: min(calc(var(--num-alts, 3) * 360px), calc(100vw - 32px));
}

.choice-section .progress-bar,
.choice-section .progress-text {
    max-width: 940px;
}

.choice-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
    margin: 30px 0;
}

.choice-card.choice-none {
    grid-column: 1 / -1;
}

.choice-card {
    position: relative;
    min-width: 0;
    padding: 0;
    overflow: hidden;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--tu-white);
    cursor: pointer;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.choice-card:hover {
    transform: translateY(-2px);
    border-color: var(--tu-red);
    box-shadow: var(--shadow-lg);
}

.choice-card.selected {
    border-color: var(--tu-red);
    box-shadow: 0 0 0 4px rgba(190, 30, 60, 0.12), var(--shadow-lg);
}

.choice-card.selected::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 8px;
    background: var(--tu-red);
}

.choice-card label {
    display: block;
    min-height: 100%;
    padding: 20px;
    cursor: pointer;
}

.choice-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--border);
}

.choice-label {
    color: var(--tu-black);
    font-size: 1.15rem;
    font-weight: 700;
}

.mode-icon {
    min-width: 46px;
    padding: 5px 8px;
    border: 1px solid var(--tu-black);
    background: var(--tu-black);
    color: var(--tu-white);
    border-radius: 999px;
    font-size: 0.74rem;
    font-weight: 700;
    text-align: center;
}

.choice-attribute {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid #ececec;
}

.choice-attribute:last-child {
    border-bottom: 0;
}

.attr-label {
    min-width: 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.attr-value {
    color: var(--tu-black);
    font-weight: 700;
    text-align: right;
}

.co2-hoch {
    color: var(--danger);
}

.co2-mittel {
    color: var(--warning);
}

.co2-niedrig,
.co2-keine-Emissionen {
    color: var(--success);
}

.choice-none {
    grid-column: 1 / -1;
    background: var(--tu-black);
    border-color: var(--tu-black);
    color: var(--tu-white);
}

.choice-none:hover,
.choice-none.selected {
    border-color: var(--tu-red);
}

.choice-none .choice-label,
.choice-none .none-description {
    color: var(--tu-white);
}

.choice-none .mode-icon {
    border-color: var(--tu-white);
    background: var(--tu-white);
    color: var(--tu-black);
}

.none-description {
    max-width: 760px;
    margin-top: 10px;
    color: var(--muted);
}

.button-container {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    align-items: center;
    margin-top: 30px;
    flex-wrap: wrap;
}

.choice-section .button-container {
    justify-content: flex-start;
}

.welcome-card .button-container,
.thankyou-card .button-container {
    justify-content: flex-start;
}

.welcome-card .button-container,
.thankyou-card .button-container {
    justify-content: flex-start;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    min-width: 150px;
    padding: 12px 22px;
    border: 2px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
    transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.btn-primary {
    background: var(--tu-red);
    color: var(--tu-white);
}

.btn-primary:hover,
.btn-primary:focus-visible {
    background: var(--tu-red-dark);
    box-shadow: 0 0 0 4px rgba(190, 30, 60, 0.16);
}

.btn-secondary {
    background: var(--tu-white);
    color: var(--tu-black);
    border-color: var(--tu-black);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
    background: var(--tu-black);
    color: var(--tu-white);
}

.btn-danger {
    background: var(--tu-black);
    color: var(--tu-white);
}

.btn-danger:hover,
.btn-danger:focus-visible {
    background: var(--tu-red);
    box-shadow: 0 0 0 4px rgba(190, 30, 60, 0.16);
}

.btn-large {
    min-width: 210px;
    min-height: 54px;
    padding-inline: 30px;
}

/* Dashboard */
.dashboard-section {
    max-width: 1180px;
    margin: 0 auto;
}

.dashboard-panel {
    padding: clamp(26px, 4vw, 44px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-lg);
}

.dashboard-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 24px;
    align-items: start;
    margin-bottom: 28px;
}

.dashboard-kicker {
    margin-bottom: 8px;
    color: var(--tu-red);
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
}

.dashboard-header h2 {
    margin-bottom: 12px;
    color: var(--tu-black);
    font-size: clamp(1.8rem, 3vw, 2.65rem);
    line-height: 1.08;
}

.dashboard-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.clear-form {
    display: contents;
}

.dashboard-notice {
    margin-bottom: 18px;
    padding: 16px 18px;
    border-left: 8px solid var(--tu-red);
    border-radius: var(--radius);
    background: var(--surface-red);
    color: var(--tu-black);
    font-weight: 700;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.stat-box {
    min-width: 0;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-muted);
}

.stat-value,
.stat-label {
    display: block;
}

.stat-value {
    overflow: hidden;
    color: var(--tu-black);
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.stat-label {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.85rem;
}

.table-shell {
    max-height: 66vh;
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--tu-white);
}

.data-table {
    width: 100%;
    min-width: 2200px;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.88rem;
}

.data-table th,
.data-table td {
    padding: 10px 12px;
    border-right: 1px solid #ececec;
    border-bottom: 1px solid #ececec;
    text-align: left;
    vertical-align: top;
}

.data-table th {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--tu-black);
    color: var(--tu-white);
    font-size: 0.78rem;
    font-weight: 700;
    white-space: nowrap;
}

.data-table td {
    max-width: 220px;
    color: var(--ink);
}

.data-table tbody tr:nth-child(even) {
    background: #f8f8f8;
}

.data-table tbody tr:hover {
    background: var(--surface-red);
}

.empty-state {
    padding: 34px;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    background: var(--surface-muted);
}

.empty-state h3 {
    margin-bottom: 8px;
    color: var(--tu-black);
}

.empty-state p {
    color: var(--muted);
}

.thankyou-card {
    padding: clamp(30px, 5vw, 54px);
    text-align: left;
}

.success-icon {
    width: 72px;
    height: 72px;
    display: grid;
    place-items: center;
    margin-bottom: 24px;
    border-radius: 50%;
    background: var(--tu-red);
    color: var(--tu-white);
    font-size: 2.4rem;
    font-weight: 700;
}

.thankyou-text {
    margin-bottom: 28px;
}

.small-text {
    margin-top: 28px;
    color: var(--muted);
    font-size: 0.9rem;
}

footer {
    margin-top: 46px;
    padding: 24px 0 30px;
    border-top: 4px solid var(--tu-red);
    color: var(--muted);
    font-size: 0.9rem;
}

footer p {
    max-width: 940px;
    margin: 0 auto;
}

@media (max-width: 900px) {
    header {
        grid-template-columns: 1fr;
    }

    .brand-panel {
        padding: 20px 20px 0;
    }

    .tu-logo {
        width: 198px;
    }

    .hero-panel {
        padding: 28px 28px 30px;
    }

}

@media (max-width: 700px) {
    .container {
        width: min(100% - 20px, 1180px);
        padding-top: 10px;
    }

    header {
        min-height: 0;
        margin-bottom: 24px;
    }

    .brand-panel {
        padding: 18px 18px 0;
    }

    .hero-panel {
        padding: 24px 22px 24px;
    }

    .welcome-card,
    .survey-form,
    .thankyou-card {
        padding: 24px 18px;
    }

    .likert-group {
        padding: 18px;
    }

    .likert-scale {
        grid-template-columns: 1fr;
    }

    .likert-option label {
        min-height: 58px;
        flex-direction: row;
        justify-content: space-between;
        padding: 12px 14px;
    }

    .button-container,
    .welcome-card .button-container,
    .thankyou-card .button-container {
        justify-content: stretch;
    }

    .dashboard-header {
        grid-template-columns: 1fr;
    }

    .dashboard-actions {
        justify-content: stretch;
    }

    .dashboard-stats {
        grid-template-columns: 1fr 1fr;
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 460px) {
    header h1 {
        font-size: 1.3rem;
    }

    .tu-logo {
        width: min(198px, 72vw);
    }

    .choice-card label {
        padding: 18px;
    }

    .choice-attribute {
        grid-template-columns: 1fr;
        gap: 3px;
    }

    .attr-value {
        text-align: left;
    }

    .dashboard-stats {
        grid-template-columns: 1fr;
    }
}

/* ===== Survey Config Section ===== */

.dashboard-notice-success {
    border-left-color: var(--success);
    background: #f0faf5;
    color: var(--success);
}

.config-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 8px;
}

.config-row {
    display: contents;
}

.config-fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    background: var(--surface-muted);
}

.config-fieldset legend {
    padding: 0 6px;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--tu-black);
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 24px;
    margin-top: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--ink);
}

.checkbox-label input[type="checkbox"] {
    width: 17px;
    height: 17px;
    cursor: pointer;
    accent-color: var(--tu-red);
    flex-shrink: 0;
}

/* ===== Page Section Config ===== */

.page-section-config {
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}

.page-section-config:last-child {
    border-bottom: none;
}

.page-section-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-section-header .checkbox-label {
    font-weight: 600;
}

.page-section-body {
    margin-top: 4px;
    margin-left: 26px;
}

.page-section-body input,
.page-section-body textarea {
    font-size: 0.9rem;
}

/* ===== Preview Tabs ===== */

.preview-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
}

.preview-tab {
    padding: 6px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius) var(--radius) 0 0;
    background: var(--surface-muted);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ink-light);
    transition: background 0.15s, color 0.15s;
}

.preview-tab:hover {
    background: var(--surface);
    color: var(--ink);
}

.preview-tab-active {
    background: var(--surface);
    color: var(--ink);
    border-bottom-color: var(--surface);
}

.preview-box {
    border: 1px solid var(--border);
    border-radius: 0 var(--radius) var(--radius) var(--radius);
    padding: 20px;
    background: var(--surface);
    max-height: 500px;
    overflow-y: auto;
}

.preview-box .welcome-card,
.preview-box .thankyou-card {
    max-width: 100%;
}

/* ===== Config Preview ===== */

.config-preview {
    margin-top: 36px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
}

.config-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.config-preview-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--tu-black);
}

.preview-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.preview-nav .btn {
    min-width: 0;
    padding: 5px 12px;
    font-size: 0.82rem;
    min-height: 32px;
}

.btn-preview-active {
    background: var(--tu-black) !important;
    color: var(--tu-white) !important;
    border-color: var(--tu-black) !important;
}

/* Survey-ID read-only display */
.survey-id-display {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin: 6px 0 4px;
}

.survey-id-display code {
    font-size: 0.9rem;
    color: var(--tu-red);
    font-family: monospace;
}

/* ===== Survey Selector Tabs ===== */

.survey-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.survey-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface-muted);
    color: var(--ink);
    font-size: 0.88rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s;
}

.survey-tab:hover {
    background: var(--surface);
    border-color: var(--tu-red);
    color: var(--tu-red);
}

.survey-tab-active {
    background: var(--tu-black);
    border-color: var(--tu-black);
    color: var(--tu-white);
}

.survey-tab-active:hover {
    background: var(--tu-black);
    border-color: var(--tu-black);
    color: var(--tu-white);
}

.survey-tab-badge {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 20px;
    background: var(--tu-red);
    color: var(--tu-white);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* ===== Admin Navigation ===== */

.admin-nav {
    display: flex;
    gap: 4px;
    padding: 12px 0 4px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
}

.admin-nav-link {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: var(--radius) var(--radius) 0 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.15s, background 0.15s;
    border: 1px solid transparent;
    border-bottom: none;
}

.admin-nav-link:hover {
    color: var(--tu-red);
    background: var(--surface-red);
    border-color: var(--border);
}

/* ===== Small Buttons ===== */

.btn-sm {
    padding: 4px 10px;
    font-size: 0.82rem;
    min-height: 28px;
}

/* ===== Action Cell ===== */

.action-cell {
    white-space: nowrap;
}

.action-cell .btn {
    margin-right: 4px;
}