.signup-selection-container,
.signup-form-container {
    width: min(720px, 100%);
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    align-items: center;
}

.signup-card {
    width: 100%;
    background: var(--app-surface);
    border-radius: var(--radius-xl);
    border: 1px solid var(--app-border);
    box-shadow: var(--app-shadow);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    color: var(--app-text-primary);
}

.signup-selection-card {
    gap: 2.25rem;
    text-align: left;
}

.signup-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-sm);
}

.signup-option {
    background: var(--app-surface-alt);
    border: 1px solid var(--app-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: inset 0 0 0 1px rgba(155, 179, 156, 0.1);
}

.signup-option h2 {
    font-size: 1.35rem;
}

.signup-option ul {
    list-style: none;
    display: grid;
    gap: 0.5rem;
    color: var(--app-text-muted);
    font-size: 0.95rem;
}

.signup-option .btn {
    align-self: flex-start;
}

.signup-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-control {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-control label {
    font-weight: 600;
    color: var(--app-text-secondary);
}

.form-control input,
.form-control textarea,
.form-control select {
    border: 1px solid var(--app-border);
    border-radius: var(--radius-lg);
    padding: 0.85rem 1rem;
    font-size: 1rem;
    background: var(--app-surface-alt);
    color: var(--app-text-primary);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control textarea {
    resize: vertical;
    min-height: 3.25rem;
}

.form-control input:focus-visible,
.form-control textarea:focus-visible,
.form-control select:focus-visible {
    outline: none;
    border-color: var(--app-accent);
    box-shadow: 0 0 0 3px rgba(155, 179, 156, 0.22);
}

.form-section {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    border: 1px solid var(--app-border);
    border-radius: var(--radius-lg);
    background: var(--app-surface-alt);
    padding: 1.25rem;
}

.form-section legend,
.form-section h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--app-text-secondary);
}

.form-section p.helper {
    font-size: 0.9rem;
    color: var(--app-text-muted);
}

.notification-checkboxes {
    display: grid;
    gap: 0.75rem;
}

.notification-checkboxes label {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.75rem;
    align-items: center;
    font-weight: 600;
    color: var(--app-text-primary);
}

.notification-checkboxes input {
    width: 18px;
    height: 18px;
}

.form-error {
    display: none;
    background: rgba(217, 82, 82, 0.14);
    color: #7f2121;
    border: 1px solid rgba(217, 82, 82, 0.3);
    padding: 0.9rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
}

.form-error.is-visible {
    display: block;
}

.btn-primary.auth-submit,
.btn-primary.signup-submit {
    display: inline-flex;
    gap: 0.5rem;
    justify-content: center;
    align-items: center;
}

.btn-primary.auth-submit.loading .btn-label,
.btn-primary.signup-submit.loading .btn-label {
    opacity: 0;
}

.btn-primary.auth-submit.loading .btn-progress,
.btn-primary.signup-submit.loading .btn-progress {
    display: inline-block;
    border-color: rgba(255, 255, 255, 0.5);
    border-top-color: var(--white);
}

.btn-progress {
    display: none;
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 999px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: var(--white);
    animation: spin 0.75s linear infinite;
}

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

@media (max-width: 720px) {
    .signup-card {
        padding: 1.75rem;
    }

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