/* ═══════════════════════════════════════════════════════════
   FORMS
   Reusable form primitives: groups, inputs, selects,
   checkboxes, hints, affix wrappers, errors.
   Used in the calculator and any future forms.
   ═══════════════════════════════════════════════════════════ */

/* ── Form card (section wrapper) ────────────────────────── */

.form-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form-card__header {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-bottom: var(--space-xs);
}

.form-card__header h2 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0;
}

.form-card__note {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin: -0.25rem 0 0;
    padding: var(--space-sm) 0.75rem;
    background: var(--color-bg-page);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-border);
}

/* ── Section number badge ────────────────────────────────── */

.section-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 50%;
    font-size: 0.6875rem;
    font-weight: 800;
    flex-shrink: 0;
    letter-spacing: 0;
}

.section-optional {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--color-text-light);
    margin-left: var(--space-xs);
}

/* ── Form layout ─────────────────────────────────────────── */

.calc-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.875rem;
}

@media (max-width: 520px) {
    .form-row { grid-template-columns: 1fr; }
}

/* ── Form group ──────────────────────────────────────────── */

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.form-group--wide {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
}

.form-group label small {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--color-text-muted);
}

/* ── Label and text input (shared across forms) ──────────── */

.form-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
}

.form-control {
    padding: var(--space-sm) 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-family: inherit;
    background: var(--color-bg);
    color: var(--color-text);
    width: 100%;
    line-height: 1.5;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(26,86,50,.12);
}

/* ── Input / select ──────────────────────────────────────── */

.form-group input[type="number"],
.form-group input[type="date"],
.form-group select {
    padding: var(--space-sm) 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-family: inherit;
    background: var(--color-bg);
    color: var(--color-text);
    width: 100%;
    line-height: 1.5;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(26,86,50,.12);
}

/* ── Input with suffix (e.g. "€", "%") ──────────────────── */

.input-affix {
    display: flex;
}

.input-affix input {
    border-radius: var(--radius-sm) 0 0 var(--radius-sm) !important;
    border-right: none !important;
    flex: 1;
    min-width: 0;
}

.input-affix:focus-within .affix-tag {
    border-color: var(--color-border-focus);
}

.affix-tag {
    display: flex;
    align-items: center;
    padding: 0 0.625rem;
    background: var(--color-bg-page);
    border: 1px solid var(--color-border);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    flex-shrink: 0;
    transition: border-color var(--transition-fast);
}

/* ── Checkbox ────────────────────────────────────────────── */

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    padding-top: 0.35rem;
}

.checkbox-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--color-primary);
    flex-shrink: 0;
    cursor: pointer;
    border-radius: 3px;
}

/* ── Hints ───────────────────────────────────────────────── */

.form-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.form-hint--green { color: var(--color-success); font-weight: 500; }
.form-hint--amber { color: var(--color-amber);   font-weight: 500; }
.form-hint--error { color: var(--color-danger); }

/* ── Validation error ────────────────────────────────────── */

.form-error {
    color: var(--color-danger);
    background: var(--color-danger-bg);
    border: 1px solid #fca5a5;
    border-radius: var(--radius-sm);
    padding: var(--space-sm) 0.75rem;
    font-size: 0.875rem;
    margin: 0;
}