:root {
    --bg: #f3f5f8;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --text: #18212f;
    --muted: #5b6574;
    --border: #dbe2ea;
    --border-strong: #c9d3df;
    --primary: #1f3a5f;
    --primary-hover: #294a77;
    --link: #2457d6;
    --success-bg: #ebf8ef;
    --success-border: #9cd3ab;
    --success-text: #19683a;
    --error-bg: #fdecec;
    --error-border: #e2aaaa;
    --error-text: #9d1f1f;
    --shadow-sm: 0 3px 10px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --space-1: 8px;
    --space-2: 12px;
    --space-3: 16px;
    --space-4: 20px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 40px;
}

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

html {
    /* "clip" statt "hidden": verhindert weiterhin horizontales Scrollen, macht aber
       (anders als "hidden") die klebende Kopfzeile (position: sticky) nicht kaputt. */
    overflow-x: clip;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.55;
    color: var(--text);
    background: linear-gradient(180deg, #f5f7fa 0%, #eef2f7 100%);
    /* siehe html-Regel oben: "clip" bewahrt das sticky-Verhalten der Kopfzeile. */
    overflow-x: clip;
    min-width: 0;
}

img,
svg,
video,
canvas,
iframe {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--link);
    text-decoration: none;
}

    a:hover {
        text-decoration: underline;
    }

h1,
h2,
h3,
h4 {
    margin-top: 0;
    margin-bottom: var(--space-3);
    line-height: 1.2;
    color: #101828;
}

h1 {
    font-size: 2.05rem;
    margin-bottom: var(--space-5);
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.42rem;
    margin-bottom: var(--space-4);
}

h3 {
    font-size: 1.14rem;
    margin-bottom: var(--space-3);
}

h4 {
    font-size: 1rem;
    margin-bottom: var(--space-2);
}

p {
    margin-top: 0;
    margin-bottom: var(--space-3);
    color: var(--text);
}

small,
.muted {
    color: var(--muted);
}

.topbar {
    background: linear-gradient(135deg, #111827 0%, #1b2940 100%);
    color: #fff;
    padding: 20px 28px 18px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.14);
    position: sticky;
    top: 0;
    z-index: 1000;
}

    .topbar .brand {
        font-size: 28px;
        font-weight: 700;
        line-height: 1.2;
        letter-spacing: 0.2px;
    }

    .topbar .nav {
        margin-top: var(--space-3);
        display: flex;
        flex-wrap: wrap;
        gap: 10px 18px;
        min-width: 0;
    }

        .topbar .nav a {
            color: rgba(255, 255, 255, 0.96);
            font-weight: 500;
        }

.container,
.page {
    width: 100%;
    max-width: 1180px;
    margin: var(--space-6) auto;
    padding: 0 24px var(--space-6);
}

.card,
.stat,
.stat-card,
.login-box {
    min-width: 0;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-4);
}

    .card.narrow {
        max-width: 760px;
    }

section.card h2,
section.card h3,
section.card h4 {
    margin-bottom: var(--space-4);
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 16px;
}

.login-box {
    width: 100%;
    max-width: 500px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 30px 28px;
    box-shadow: var(--shadow-md);
}

    .login-box h1,
    .login-box h2 {
        margin-bottom: var(--space-5);
        font-size: 30px;
        line-height: 1.2;
    }

.form-row {
    margin-bottom: var(--space-3);
}

    .form-row label,
    label {
        display: block;
        margin-bottom: 6px;
        font-weight: 600;
        font-size: 14px;
        color: #17212f;
    }

    .form-row input[type="text"],
    .form-row input[type="password"],
    .form-row input[type="email"],
    .form-row input[type="date"],
    .form-row input[type="datetime"],
    .form-row input[type="datetime-local"],
    .form-row input[type="number"],
    .form-row input[type="time"],
    .form-row select,
    .form-row textarea,
    input[type="text"],
    input[type="password"],
    input[type="email"],
    input[type="date"],
    input[type="datetime"],
    input[type="datetime-local"],
    input[type="number"],
    input[type="time"],
    select,
    textarea {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        padding: 12px 14px;
        border: 1px solid var(--border-strong);
        border-radius: var(--radius-sm);
        font-size: 16px;
        line-height: 1.4;
        color: var(--text);
        background: #fff;
        margin-bottom: var(--space-3);
        transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
        appearance: none;
    }

    textarea,
    .form-row textarea {
        min-height: 108px;
        resize: vertical;
    }

input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
    transform: translateY(1px);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: #7ca4ff;
    box-shadow: 0 0 0 3px rgba(36, 87, 214, 0.14);
    background: #fff;
}

button,
input[type="submit"],
input[type="button"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    max-width: 100%;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 18px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.2;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.05s ease, box-shadow 0.15s ease;
    box-shadow: 0 2px 8px rgba(17, 24, 39, 0.08);
}

    button:hover,
    input[type="submit"]:hover,
    input[type="button"]:hover {
        background: var(--primary-hover);
        text-decoration: none;
    }

    button:active,
    input[type="submit"]:active,
    input[type="button"]:active {
        transform: translateY(1px);
    }

.actions {
    margin-top: var(--space-4);
}

.success-message,
.alert.success {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-text);
    padding: 13px 15px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-4);
}

.error-message,
.validation-summary-errors {
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error-text);
    padding: 13px 15px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-4);
}

.field-validation-error {
    display: block;
    color: #b42318;
    margin-top: -6px;
    margin-bottom: 10px;
    font-size: 14px;
}

.input-validation-error {
    border-color: #d92d20 !important;
    background: #fff7f7;
}

.validation-summary-errors ul {
    margin: 0;
    padding-left: 18px;
}

.validation-summary-errors li {
    margin-bottom: 4px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.stat,
.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 18px;
    box-shadow: var(--shadow-sm);
    min-height: 88px;
}

    .stat strong,
    .stat-card strong {
        display: block;
        font-size: 14px;
        color: var(--muted);
        margin-bottom: 10px;
    }

    .stat span,
    .stat-card span {
        display: block;
        font-size: 1.6rem;
        font-weight: 700;
        color: #111827;
    }

.grid-two,
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
    align-items: start;
}

    .grid-two > *,
    .form-grid > * {
        min-width: 0;
    }

.filter-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: var(--space-3);
    align-items: end;
    margin-bottom: var(--space-4);
}

    .filter-bar > * {
        min-width: 0;
    }

    .filter-bar button {
        width: fit-content;
        min-width: 120px;
    }

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
    table-layout: fixed;
}

    .table th,
    .table td {
        text-align: left;
        padding: 12px 10px;
        border-bottom: 1px solid #e7edf4;
        vertical-align: top;
        overflow-wrap: anywhere;
        word-break: break-word;
    }

    .table th {
        font-size: 14px;
        color: var(--muted);
        font-weight: 700;
        white-space: nowrap;
    }

    .table tr:last-child td {
        border-bottom: none;
    }

.list-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-3);
    padding: 14px 0;
    border-bottom: 1px solid #e8edf3;
}

    .list-row > * {
        min-width: 0;
        overflow-wrap: anywhere;
        word-break: break-word;
    }

    .list-row:last-child {
        border-bottom: none;
    }

    .list-row a {
        white-space: normal;
    }

.inline {
    display: inline-block;
    margin-left: 8px;
}

hr {
    border: 0;
    border-top: 1px solid #e5e7eb;
    margin: var(--space-5) 0;
}

pre,
code {
    max-width: 100%;
    overflow-x: auto;
}

@media (max-width: 900px) {
    .container,
    .page {
        margin-top: 24px;
        padding: 0 18px 28px;
    }

    .grid-two,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .topbar {
        padding: 16px 18px 14px;
    }

        .topbar .brand {
            font-size: 24px;
        }

    .stats {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    }

    .card {
        padding: 20px;
    }
}

@media (max-width: 640px) {
    html,
    body {
        font-size: 15px;
    }

    .topbar {
        padding: 14px 14px 12px;
    }

        .topbar .brand {
            font-size: 21px;
            line-height: 1.25;
        }

        .topbar .nav {
            margin-top: 10px;
            gap: 8px 12px;
        }

            .topbar .nav a {
                font-size: 15px;
            }

    .container,
    .page {
        margin: 18px auto;
        padding: 0 12px 22px;
    }

    .card {
        padding: 16px 14px;
        border-radius: 14px;
        margin-bottom: 16px;
    }

    .login-page {
        padding: 18px 12px;
        align-items: flex-start;
    }

    .login-box {
        padding: 20px 16px 18px;
        border-radius: 14px;
    }

        .login-box h1,
        .login-box h2 {
            font-size: 24px;
            margin-bottom: 18px;
        }

    h1 {
        font-size: 1.75rem;
        margin-bottom: 18px;
    }

    h2 {
        font-size: 1.24rem;
        margin-bottom: 14px;
    }

    h3 {
        font-size: 1.06rem;
        margin-bottom: 12px;
    }

    p {
        margin-bottom: 10px;
    }

    .form-row {
        margin-bottom: 14px;
    }

        .form-row label,
        label {
            font-size: 14px;
            margin-bottom: 6px;
        }

        .form-row input[type="text"],
        .form-row input[type="password"],
        .form-row input[type="email"],
        .form-row input[type="date"],
        .form-row input[type="datetime"],
        .form-row input[type="datetime-local"],
        .form-row input[type="number"],
        .form-row input[type="time"],
        .form-row select,
        .form-row textarea,
        input[type="text"],
        input[type="password"],
        input[type="email"],
        input[type="date"],
        input[type="datetime"],
        input[type="datetime-local"],
        input[type="number"],
        input[type="time"],
        select,
        textarea {
            padding: 11px 12px;
            font-size: 16px;
            margin-bottom: 12px;
        }

        textarea,
        .form-row textarea {
            min-height: 96px;
        }

    button,
    input[type="submit"],
    input[type="button"] {
        width: 100%;
        padding: 12px 16px;
        font-size: 15px;
    }

    .actions button,
    .filter-bar button,
    .login-box button {
        width: 100%;
    }

    .stats {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 18px;
    }

    .stat,
    .stat-card {
        min-height: auto;
        padding: 16px 14px;
    }

        .stat strong,
        .stat-card strong {
            margin-bottom: 8px;
        }

        .stat span,
        .stat-card span {
            font-size: 1.4rem;
        }

    .list-row {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        padding: 12px 0;
    }

    .filter-bar {
        grid-template-columns: 1fr;
        gap: 10px;
    }

        .filter-bar button {
            min-width: 0;
        }

    .table,
    .table thead,
    .table tbody,
    .table th,
    .table td,
    .table tr {
        display: block;
        width: 100%;
    }

    .table {
        table-layout: auto;
    }

        .table thead {
            display: none;
        }

        .table tr {
            border: 1px solid #e8edf3;
            border-radius: 12px;
            padding: 10px 12px;
            margin-bottom: 12px;
            background: #fff;
        }

        .table td {
            border: none;
            padding: 6px 0;
            white-space: normal;
        }

    .inline {
        display: block;
        margin-left: 0;
        margin-top: 8px;
    }
}

@media (max-width: 420px) {
    .topbar .brand {
        font-size: 19px;
    }

    .container,
    .page {
        padding: 0 10px 18px;
    }

    .card {
        padding: 14px 12px;
    }

    h1 {
        font-size: 1.58rem;
    }

    .login-box h1,
    .login-box h2 {
        font-size: 22px;
    }
}

/* Kleine Aktions-Buttons (z.B. Löschen) */
.mini-action {
    padding: 4px 10px;
    font-size: 13px;
}

button.mini-danger,
.mini-danger {
    background: #c0392b;
}

    button.mini-danger:hover,
    .mini-danger:hover {
        background: #a93226;
    }

/* Auswahl-Häkchen für den Dokumentenversand */
label.send-check {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid #cfcfcf;
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
}

    label.send-check input[type="checkbox"] {
        margin: 0;
    }