.vsta-app {
    --vsta-primary: #1d4f7a;
    --vsta-primary-dark: #153c5e;
    --vsta-soft: #eef5fa;
    --vsta-border: #cbd7e0;
    --vsta-text: #1f2933;
    --vsta-muted: #5d6a75;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--vsta-text);
}

.vsta-app * { box-sizing: border-box; }

.vsta-shell {
    max-width: 820px;
    margin: 24px auto;
    background: #fff;
    border: 1px solid var(--vsta-border);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 12px 34px rgba(0,0,0,.08);
}

.vsta-header {
    display: flex;
    gap: 16px;
    align-items: center;
    padding: 24px 28px;
    background: var(--vsta-soft);
    border-bottom: 1px solid var(--vsta-border);
}

.vsta-brand {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--vsta-primary);
    color: #fff;
    font-size: 28px;
    font-weight: 700;
    flex: 0 0 auto;
}

.vsta-kicker {
    margin: 0 0 4px;
    color: var(--vsta-primary);
    font-weight: 700;
}

.vsta-header h1 {
    margin: 0;
    font-size: clamp(25px, 4vw, 36px);
    line-height: 1.1;
}

.vsta-main { padding: 30px 28px; }

.vsta-card {
    border: 1px solid var(--vsta-border);
    border-radius: 16px;
    padding: 26px;
    background: #fff;
}

.vsta-progress {
    height: 12px;
    border-radius: 999px;
    background: #e8edf1;
    overflow: hidden;
    margin-bottom: 22px;
}

.vsta-progress > span {
    display: block;
    height: 100%;
    background: var(--vsta-primary);
    border-radius: inherit;
}

.vsta-step {
    color: var(--vsta-muted);
    font-size: 15px;
    margin: 0 0 10px;
}

.vsta-question {
    font-size: clamp(23px, 3.8vw, 31px);
    line-height: 1.25;
    margin: 0 0 12px;
}

.vsta-help {
    font-size: 17px;
    line-height: 1.5;
    color: var(--vsta-muted);
    margin: 0 0 22px;
}

.vsta-input {
    width: 100%;
    min-height: 54px;
    border: 2px solid #98a9b7;
    border-radius: 11px;
    padding: 12px 14px;
    font-size: 20px;
    background: #fff;
}

textarea.vsta-input { min-height: 105px; resize: vertical; }

.vsta-input:focus {
    outline: 3px solid rgba(29,79,122,.16);
    border-color: var(--vsta-primary);
}

.vsta-options {
    display: grid;
    gap: 12px;
}

.vsta-option {
    width: 100%;
    text-align: left;
    border: 2px solid #98a9b7;
    background: #fff;
    border-radius: 12px;
    padding: 15px 16px;
    font-size: 19px;
    cursor: pointer;
}

.vsta-option:hover,
.vsta-option:focus {
    border-color: var(--vsta-primary);
    background: var(--vsta-soft);
    outline: none;
}

.vsta-option.is-selected {
    border-color: var(--vsta-primary);
    background: var(--vsta-soft);
    font-weight: 700;
}

.vsta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.vsta-button {
    border: 0;
    border-radius: 10px;
    padding: 13px 18px;
    font-size: 17px;
    font-weight: 700;
    cursor: pointer;
    min-height: 50px;
}

.vsta-button--primary {
    background: var(--vsta-primary);
    color: #fff;
}

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

.vsta-button--secondary {
    background: #e9eef2;
    color: #24313b;
}

.vsta-button--voice {
    background: #fff;
    color: var(--vsta-primary);
    border: 2px solid var(--vsta-primary);
}

.vsta-notice {
    margin-top: 18px;
    padding: 14px 16px;
    border-radius: 10px;
    background: #f2f7fa;
    line-height: 1.45;
}

.vsta-notice--error {
    background: #fff1f1;
    color: #8a1f1f;
}

.vsta-summary {
    display: grid;
    gap: 10px;
}

.vsta-summary-row {
    padding: 12px 14px;
    border: 1px solid var(--vsta-border);
    border-radius: 10px;
}

.vsta-summary-row strong {
    display: block;
    margin-bottom: 4px;
}

.vsta-footer {
    border-top: 1px solid var(--vsta-border);
    padding: 18px 28px;
    color: var(--vsta-muted);
    font-size: 14px;
}

.vsta-footer p { margin: 3px 0; }

@media (max-width: 600px) {
    .vsta-shell { margin: 0; border-radius: 0; border-left: 0; border-right: 0; }
    .vsta-header, .vsta-main, .vsta-footer { padding-left: 18px; padding-right: 18px; }
    .vsta-card { padding: 20px 16px; }
    .vsta-actions { display: grid; }
    .vsta-button { width: 100%; }
}


/* M001.1 - Sprache, Signatur, PDF-Prüfung und E-Mail */
.vsta-input-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: stretch;
}

.vsta-mic {
    min-width: 155px;
    border: 2px solid var(--vsta-primary);
    border-radius: 11px;
    background: #fff;
    color: var(--vsta-primary);
    font-size: 16px;
    font-weight: 700;
    padding: 10px 14px;
    cursor: pointer;
}

.vsta-signature-card,
.vsta-pdf-preview-card,
.vsta-email-card {
    margin-top: 24px;
    padding: 20px;
    border: 2px solid var(--vsta-primary);
    border-radius: 14px;
    background: #f7fbfd;
}

.vsta-signature-card h3,
.vsta-pdf-preview-card h3,
.vsta-email-card h3 {
    margin: 0 0 12px;
    font-size: 23px;
}

.vsta-signature-photo-help {
    margin: 16px 0;
    padding: 16px;
    border: 1px solid #b8cbd8;
    border-radius: 12px;
    background: #fff;
}

.vsta-signature-photo-help h4 {
    margin: 0 0 14px;
    font-size: 20px;
}

.vsta-signature-photo-help-list {
    display: grid;
    gap: 10px;
}

.vsta-signature-photo-help-item {
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 10px;
    padding: 10px;
    border: 1px solid #d5e0e7;
    border-radius: 10px;
}

.vsta-signature-photo-help-item--important {
    border: 2px solid var(--vsta-primary);
    background: #eef7fc;
}

.vsta-photo-help-icon {
    font-size: 25px;
}

.vsta-signature-photo-help-item strong {
    display: block;
    margin-bottom: 3px;
}

.vsta-signature-photo-help-item span:not(.vsta-photo-help-icon),
.vsta-signature-status,
.vsta-signature-privacy,
.vsta-email-note {
    color: var(--vsta-muted);
    line-height: 1.45;
}

.vsta-signature-photo-read {
    margin-top: 12px;
}

.vsta-signature-upload-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 58px;
    padding: 13px 18px;
    border: 2px solid var(--vsta-primary);
    border-radius: 11px;
    color: var(--vsta-primary);
    background: #fff;
    font-weight: 700;
    font-size: 17px;
    cursor: pointer;
}

.vsta-signature-upload-button input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
}

.vsta-signature-preview-wrap {
    margin-top: 18px;
}

.vsta-signature-preview-box {
    margin-top: 8px;
    min-height: 120px;
    padding: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #b9cad5;
    border-radius: 12px;
    background: #fff;
    overflow: hidden;
}

.vsta-signature-preview-box img {
    max-width: 100%;
    max-height: 150px;
}

.vsta-signature-size-title {
    margin: 18px 0 10px;
    font-weight: 700;
}

.vsta-signature-size-buttons {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.vsta-size-choice {
    min-height: 48px;
    border: 2px solid var(--vsta-primary);
    border-radius: 10px;
    background: #fff;
    color: var(--vsta-primary);
    font-weight: 700;
    cursor: pointer;
}

.vsta-size-choice.is-selected {
    background: var(--vsta-primary);
    color: #fff;
}

.vsta-confirm {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    margin-top: 22px;
    padding: 16px;
    border: 2px solid var(--vsta-border);
    border-radius: 12px;
    background: #fafcfd;
    font-size: 18px;
    line-height: 1.4;
}

.vsta-confirm input {
    width: 24px;
    height: 24px;
    margin-top: 1px;
    flex: 0 0 auto;
}

.vsta-pdf-preview-page,
.vsta-pdf-preview-zoom {
    margin-top: 12px;
    padding: 8px;
    border: 1px solid #b9cad5;
    border-radius: 12px;
    background: #fff;
    overflow: hidden;
}

.vsta-pdf-preview-page img,
.vsta-pdf-preview-zoom img {
    display: block;
    width: 100%;
    height: auto;
}

.vsta-pdf-preview-card h4 {
    margin: 20px 0 8px;
    font-size: 20px;
}

.vsta-pdf-open-link {
    display: inline-flex;
    margin-top: 14px;
    text-decoration: none;
}

.vsta-button--email {
    background: #176b3a;
    color: #fff;
}

.vsta-button--email:disabled {
    background: #d7dee3 !important;
    color: #596771 !important;
    cursor: not-allowed;
    opacity: 1;
}

.vsta-email-note {
    margin-top: 12px;
    padding: 12px 14px;
    border: 1px solid #cbd8e0;
    border-radius: 10px;
    background: #fff;
}

@media (max-width: 600px) {
    .vsta-input-row,
    .vsta-signature-size-buttons {
        grid-template-columns: 1fr;
    }

    .vsta-mic,
    .vsta-signature-upload-button,
    .vsta-signature-photo-read,
    .vsta-button--email,
    .vsta-pdf-open-link {
        width: 100%;
    }
}


/* M001.2 – einfache Datumseingabe ohne problematischen Handy-Datepicker */
.vsta-date-help {
    margin: 10px 0 0;
    padding: 10px 12px;
    border-radius: 9px;
    background: #eef6fb;
    color: var(--vsta-muted);
    font-size: 15px;
    line-height: 1.45;
}

.vsta-date-help strong {
    color: var(--vsta-text);
}