/* ==========================================================================
   EchoSeiten Kunden-Backend – System UI
   Ruhige, app-artige Verwaltungsoberfläche ohne festen Logo-Header.
   ========================================================================== */

:root {
    --color-bg: #f6f7f8;
    --color-bg-subtle: #f8f9fa;
    --color-bg-muted: #eef1f3;
    --color-surface: #ffffff;

    --color-text: #15181c;
    --color-text-secondary: #5f6670;
    --color-text-muted: #8b939d;

    --color-border: #e1e5e9;
    --color-border-strong: #cbd1d7;

    --color-primary: #12161a;
    --color-primary-hover: #2a3036;
    --color-primary-text: #ffffff;

    --color-success: #167a55;
    --color-success-hover: #116744;
    --color-success-text: #ffffff;
    --color-success-bg: #edf8f3;
    --color-success-border: #c8e8d9;
    --color-success-text-dark: #145c42;

    --color-danger: #b42318;
    --color-danger-hover: #941d14;
    --color-danger-text: #ffffff;
    --color-danger-bg: #fff1f0;
    --color-danger-border: #f3c7c3;
    --color-danger-text-dark: #8f1d15;

    --color-secondary-bg: #ffffff;
    --color-secondary-hover: #f4f5f6;
    --color-secondary-text: #15181c;
    --color-secondary-border: #d6dbe0;

    --content-max-width: 760px;
    --content-padding: clamp(16px, 4vw, 28px);
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 16px;

    --shadow-sm: none;
    --shadow-card: none;
    --shadow-modal: 0 18px 55px rgba(15, 23, 42, 0.18);
    --overlay-bg: rgba(17, 24, 39, 0.45);

    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;

    --settings-group-radius: 16px;
    --settings-row-min-height: 72px;
    --settings-row-padding-x: 16px;
    --settings-row-hover: #f4f6f7;
    --settings-icon-size: 40px;
    --settings-icon-bg: #eef1f3;
    --settings-chevron-size: 22px;
}

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

html {
    scroll-behavior: auto;
    -webkit-text-size-adjust: 100%;
    background: var(--color-bg);
}

body {
    min-height: 100vh;
    min-height: 100dvh;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: "Roboto", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body.modal-open { overflow: hidden; }

img { max-width: 100%; display: block; }
ul { list-style: none; }

a {
    color: inherit;
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
}

a:visited { color: inherit; }

button, input, textarea, select { font: inherit; }

h1, h2, h3, h4 {
    color: var(--color-text);
    font-weight: 700;
    line-height: 1.2;
}

/* Layout */
#container {
    width: 100%;
    max-width: var(--content-max-width);
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0 auto;
    padding: 30px var(--content-padding) calc(42px + env(safe-area-inset-bottom, 0px));
}

main { width: 100%; }

footer {
    margin-top: 28px;
}

/* In-flow navigation instead of a fixed brand header */
.backend-page-nav {
    margin: 0 0 20px;
}

.backend-back-link,
.backend-back-link:visited {
    width: max-content;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 0 8px 0 4px;
    border-radius: 10px;
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.backend-back-link:hover {
    background: var(--color-bg-muted);
    color: var(--color-text);
}

.backend-back-link:focus-visible {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}

.backend-back-link__icon {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Page hierarchy */
.page-header,
.overview-header,
.beitraege-header {
    margin-bottom: 24px;
}

.page-header .eyebrow,
.page-eyebrow {
    margin-bottom: 7px;
    color: var(--color-text-muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .075em;
    text-transform: uppercase;
}

.page-title,
.page-header h1 {
    margin: 0 0 7px;
    font-size: clamp(28px, 5vw, 34px);
    font-weight: 700;
    letter-spacing: -.035em;
}

.page-text,
.page-header p:not(.eyebrow) {
    max-width: 58ch;
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.55;
}

/* Buttons */
.button-link,
button.button-link,
.btn,
form input[type="submit"],
form button[type="submit"] {
    min-height: 48px;
    border: 1px solid transparent;
    border-radius: 12px;
    padding: 11px 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.3;
    text-align: center;
    cursor: pointer;
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast),
        opacity var(--transition-fast);
}

.button-link,
button.button-link,
.btn { width: 100%; }

.button-link:focus-visible,
button.button-link:focus-visible,
.btn:focus-visible,
form input[type="submit"]:focus-visible,
form button[type="submit"]:focus-visible {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}

.button-link:disabled,
button.button-link:disabled,
.btn:disabled,
form input[type="submit"]:disabled,
form button[type="submit"]:disabled {
    opacity: .55;
    cursor: not-allowed;
}

.button-primary,
.btn-primary,
form input[type="submit"],
form button[type="submit"] {
    background: var(--color-primary);
    color: var(--color-primary-text);
    border-color: var(--color-primary);
}

.button-primary:visited,
.btn-primary:visited { color: var(--color-primary-text); }

.button-primary:hover,
.btn-primary:hover,
form input[type="submit"]:hover,
form button[type="submit"]:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.button-secondary,
.btn-secondary {
    background: var(--color-secondary-bg);
    color: var(--color-secondary-text);
    border-color: var(--color-secondary-border);
}

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

.button-success,
.btn-success {
    background: var(--color-success);
    color: var(--color-success-text);
    border-color: var(--color-success);
}

.button-success:visited,
.btn-success:visited { color: var(--color-success-text); }

.button-success:hover,
.btn-success:hover {
    background: var(--color-success-hover);
    border-color: var(--color-success-hover);
}

.button-danger,
.btn-danger,
.delete-button {
    background: var(--color-danger);
    color: var(--color-danger-text);
    border-color: var(--color-danger);
}

.button-danger:hover,
.btn-danger:hover,
.delete-button:hover {
    background: var(--color-danger-hover);
    border-color: var(--color-danger-hover);
}

.delete-button {
    min-height: 44px;
    border: 0;
    border-radius: 10px;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
}

.button-group {
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

/* Forms */
form label {
    display: block;
    margin: 19px 0 7px;
    color: var(--color-text);
    font-size: 13px;
    font-weight: 650;
}

form input:not([type="submit"]):not([type="button"]):not([type="hidden"]):not([type="checkbox"]):not([type="radio"]),
form textarea,
form select {
    width: 100%;
    min-height: 50px;
    padding: 12px 13px;
    border: 1px solid var(--color-border-strong);
    border-radius: 12px;
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 16px;
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        background-color var(--transition-fast);
}

form textarea {
    min-height: 180px;
    resize: vertical;
    line-height: 1.55;
}

form input:not([type="submit"]):not([type="button"]):not([type="hidden"]):focus,
form textarea:focus,
form select:focus {
    outline: none;
    border-color: #626a73;
    box-shadow: 0 0 0 3px rgba(17, 24, 39, .07);
}

form input[type="submit"],
form button[type="submit"] {
    width: 100%;
    margin-top: 26px;
}

.eingabe { margin-bottom: 18px; }

/* System-like grouped surfaces */
.section-box,
.panel,
.datenform,
.upload-form,
.upload-section > form,
.login-form,
.contract-card,
.confirmation-document {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: none;
}

.section-box {
    padding: 22px;
    margin-bottom: 18px;
}

.section-box h2 {
    margin-bottom: 7px;
    font-size: 19px;
}

.section-desc {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.info-box,
.preview-box,
.empty-box {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 15px;
    background: var(--color-bg-subtle);
}

.info-row {
    padding: 11px 0;
    border-bottom: 1px solid var(--color-border);
}

.info-row:last-child { border-bottom: 0; }

.info-label {
    display: block;
    margin-bottom: 4px;
    color: var(--color-text-muted);
    font-size: 10.5px;
    font-weight: 700;
    letter-spacing: .065em;
    text-transform: uppercase;
}

.info-value {
    display: block;
    color: var(--color-text);
    font-size: 14px;
    line-height: 1.45;
    word-break: break-word;
}

/* Alerts */
.alert {
    margin: 0 0 16px;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid transparent;
    font-size: 13px;
    line-height: 1.45;
}

.alert-success {
    color: var(--color-success-text-dark);
    background: var(--color-success-bg);
    border-color: var(--color-success-border);
}

.alert-danger {
    color: var(--color-danger-text-dark);
    background: var(--color-danger-bg);
    border-color: var(--color-danger-border);
}

.error {
    margin-top: 6px;
    color: var(--color-danger);
    font-size: 12.5px;
}

/* Settings components */
.settings-group {
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: var(--settings-group-radius);
    background: var(--color-surface);
    box-shadow: none;
}

.settings-row,
button.settings-row {
    width: 100%;
    min-height: var(--settings-row-min-height);
    margin: 0;
    padding: 13px var(--settings-row-padding-x);
    display: grid;
    grid-template-columns: var(--settings-icon-size) minmax(0, 1fr) var(--settings-chevron-size);
    align-items: center;
    gap: 14px;
    border: 0;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    background: transparent;
    color: var(--color-text);
    font-family: inherit;
    text-align: left;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.settings-group > .settings-row:last-child,
.settings-group > a.settings-row:last-child,
.settings-group > form:last-child .settings-row,
.settings-group > details:last-child > summary.settings-row {
    border-bottom: 0;
}

.settings-row:hover,
button.settings-row:hover,
.settings-row:focus-visible,
button.settings-row:focus-visible {
    background: var(--settings-row-hover);
}

.settings-row:focus-visible,
button.settings-row:focus-visible {
    outline: 2px solid var(--color-text);
    outline-offset: -2px;
}

.settings-row__icon {
    width: var(--settings-icon-size);
    height: var(--settings-icon-size);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--settings-icon-bg);
    color: #454d55;
}

.settings-row__icon--primary {
    background: var(--color-primary);
    color: #fff;
}

.settings-row__icon svg {
    width: 21px;
    height: 21px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.settings-row__content {
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.settings-row__title {
    display: block;
    color: var(--color-text);
    font-size: 15px;
    font-weight: 650;
    line-height: 1.3;
}

.settings-row__subtitle {
    display: block;
    margin-top: 3px;
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: 400;
    line-height: 1.4;
    overflow-wrap: anywhere;
}

.settings-row__chevron {
    width: var(--settings-chevron-size);
    height: var(--settings-chevron-size);
    justify-self: end;
    fill: none;
    stroke: #89919a;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform var(--transition-fast), stroke var(--transition-fast);
}

.settings-row:hover .settings-row__chevron,
button.settings-row:hover .settings-row__chevron {
    stroke: #505860;
}

/* Dialogs */
.modal-overlay,
.popup-overlay {
    position: fixed;
    inset: 0;
    z-index: 3000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--overlay-bg);
}

.modal-overlay {
    display: flex;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.popup-overlay { display: none; }
.modal-overlay.active { opacity: 1; visibility: visible; pointer-events: auto; }
.popup-overlay.active { display: flex; }

.modal-box,
.popup-box {
    width: 100%;
    max-width: 390px;
    padding: 24px;
    border: 1px solid rgba(255,255,255,.55);
    border-radius: 18px;
    background: var(--color-surface);
    box-shadow: var(--shadow-modal);
    text-align: left;
}

.modal-box h3,
.popup-box h4 {
    margin-bottom: 9px;
    font-size: 20px;
}

.modal-box p,
.popup-box p {
    margin-bottom: 20px;
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.modal-actions,
.popup-actions {
    display: flex;
    justify-content: flex-end;
    gap: 9px;
}

.modal-cancel,
.modal-confirm,
.popup-cancel,
.popup-confirm,
.popup-close {
    min-height: 42px;
    min-width: 108px;
    padding: 9px 15px;
    border: 0;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
}

.modal-cancel,
.popup-cancel {
    background: var(--color-bg-muted);
    color: var(--color-text);
}

.modal-confirm,
.popup-confirm,
.popup-close {
    background: var(--color-primary);
    color: var(--color-primary-text);
}

.logout-post-form {
    display: inline;
    margin: 0;
}

.logout-post-form button {
    background: none;
    border: 0;
    padding: 0;
    font: inherit;
    color: inherit;
    cursor: pointer;
}

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

@keyframes spin { to { transform: rotate(360deg); } }

@media (min-width: 640px) {
    .button-group.two-columns { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 639px) {
    #container {
        padding-top: 20px;
    }

    .backend-page-nav {
        margin-bottom: 16px;
    }

    .page-title,
    .page-header h1 {
        font-size: 28px;
    }

    .modal-actions,
    .popup-actions {
        flex-direction: column-reverse;
    }

    .modal-cancel,
    .modal-confirm,
    .popup-cancel,
    .popup-confirm,
    .popup-close {
        width: 100%;
    }
}

@media (max-width: 480px) {
    :root {
        --settings-row-min-height: 68px;
        --settings-row-padding-x: 14px;
        --settings-icon-size: 38px;
    }

    .settings-row,
    button.settings-row {
        gap: 12px;
    }

    .settings-row__icon svg {
        width: 20px;
        height: 20px;
    }

    .settings-row__title {
        font-size: 14.5px;
    }

    .settings-row__subtitle {
        font-size: 12.5px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}