:root {
    --external-appointment-bg: #f3f6fb;
    --external-appointment-card: #ffffff;
    --external-appointment-text: #1f2937;
    --external-appointment-muted: #6b7280;
    --external-appointment-primary: #2563eb;
    --external-appointment-primary-dark: #1d4ed8;
    --external-appointment-border: #e5e7eb;
    --external-appointment-success: #059669;
    --external-appointment-error: #dc2626;
}

* {
    box-sizing: border-box;
}

body.external-appointment-page {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    color: var(--external-appointment-text);
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.08), transparent 40%),
        var(--external-appointment-bg);
}

.external-appointment-shell {
    width: min(720px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 2.5rem 0 3rem;
}

.external-appointment-header {
    margin-bottom: 1.5rem;
}

.external-appointment-kicker {
    margin: 0 0 0.35rem;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--external-appointment-primary);
}

.external-appointment-header h1 {
    margin: 0;
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    line-height: 1.15;
}

.external-appointment-lead {
    margin: 0.75rem 0 0;
    color: var(--external-appointment-muted);
    font-size: 1.05rem;
    line-height: 1.6;
}

.external-appointment-card {
    background: var(--external-appointment-card);
    border: 1px solid var(--external-appointment-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

.external-appointment-card h2 {
    margin: 0 0 0.5rem;
    font-size: 1.35rem;
}

.external-appointment-hint {
    margin: 0 0 1.25rem;
    color: var(--external-appointment-muted);
    line-height: 1.5;
}

.external-appointment-form {
    display: grid;
    gap: 1rem;
}

.external-appointment-field {
    display: grid;
    gap: 0.4rem;
}

.external-appointment-field > span {
    font-size: 0.92rem;
    font-weight: 600;
}

.external-appointment-field input,
.external-appointment-field textarea {
    width: 100%;
    border: 1px solid var(--external-appointment-border);
    border-radius: 10px;
    padding: 0.75rem 0.85rem;
    font: inherit;
    color: inherit;
    background: #fff;
}

.external-appointment-field input:focus,
.external-appointment-field textarea:focus {
    outline: 2px solid rgba(37, 99, 235, 0.25);
    border-color: var(--external-appointment-primary);
}

.external-appointment-slots {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
    gap: 0.5rem;
}

.external-appointment-slots-empty {
    grid-column: 1 / -1;
    margin: 0;
    color: var(--external-appointment-muted);
    font-size: 0.95rem;
}

.external-appointment-slot {
    border: 1px solid var(--external-appointment-border);
    border-radius: 10px;
    background: #fff;
    padding: 0.65rem 0.5rem;
    font: inherit;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.external-appointment-slot:hover:not(:disabled) {
    border-color: var(--external-appointment-primary);
}

.external-appointment-slot.is-selected {
    border-color: var(--external-appointment-primary);
    background: rgba(37, 99, 235, 0.08);
    color: var(--external-appointment-primary-dark);
    font-weight: 600;
}

.external-appointment-slot:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    text-decoration: line-through;
}

.external-appointment-error {
    margin: 0;
    color: var(--external-appointment-error);
    font-size: 0.95rem;
}

.external-appointment-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    border: 0;
    border-radius: 12px;
    padding: 0.9rem 1rem;
    font: inherit;
    font-weight: 600;
    color: #fff;
    background: var(--external-appointment-primary);
    cursor: pointer;
}

.external-appointment-submit:hover:not(:disabled) {
    background: var(--external-appointment-primary-dark);
}

.external-appointment-submit:disabled {
    opacity: 0.6;
    cursor: wait;
}

.external-appointment-submit-secondary {
    background: #fff;
    color: var(--external-appointment-primary);
    border: 1px solid var(--external-appointment-border);
}

.external-appointment-success {
    text-align: center;
}

.external-appointment-success-icon {
    font-size: 2.5rem;
    color: var(--external-appointment-success);
    margin-bottom: 0.5rem;
}

@media (max-width: 600px) {
    .external-appointment-shell {
        width: min(100%, calc(100% - 1rem));
        padding-top: 1.25rem;
    }

    .external-appointment-card {
        padding: 1rem;
    }
}