/* ==========================================================================
   components/forms.css — inputs, selects, checkboxes, labels, validation
   --------------------------------------------------------------------------
   Used by: registration, login, account, admin, slide-in forms.
   Includes the password strength meter used on registration.
   FLAT: focus is shown by border color only, no glow/shadow.
   ========================================================================== */

/* ----- Field wrapper — one label + control + hint/error -------------------- */
.field {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    margin-bottom: var(--space-4);
}

.field label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
}

/* Row of fields side by side (expiry month/year/CVC, amount/currency).
   Each child .field keeps its own bottom margin; they stack on mobile. */
.field-row {
    display: flex;
    gap: var(--space-3);
}

.field-row .field {
    flex: 1;
    min-width: 0;
}

@media (max-width: 480px) {
    .field-row {
        flex-wrap: wrap;
    }

    .field-row .field {
        flex-basis: 100%;
    }
}

/* Hint text under a control */
.field .hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Error message under a control (filled by JS/i18n, never hardcoded) */
.field .error {
    font-size: var(--font-size-xs);
    color: var(--color-danger);
}

/* Real-time validation states (e.g. card number in the virtual terminal) */
.input.is-valid {
    border-color: var(--color-success);
}

.input.is-invalid {
    border-color: var(--color-danger);
}

.field .hint.is-valid {
    color: var(--color-success);
}

.field .hint.is-invalid {
    color: var(--color-danger);
}

/* ----- Text inputs / selects / textareas ----------------------------------- */
.input,
.select,
.textarea {
    width: 100%;
    min-height: 44px;                    /* touch-friendly */
    padding: 0 var(--space-3);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    background: var(--color-surface);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}

.textarea {
    padding: var(--space-3);
    min-height: 100px;
    resize: vertical;
}

.input:focus,
.select:focus,
.textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.input::placeholder,
.textarea::placeholder {
    color: var(--color-text-muted);
}

/* Locked fields — frozen after verification (readonly input / disabled select) */
.input[readonly],
.select:disabled,
.textarea[readonly] {
    background: var(--color-surface-alt);
    color: var(--color-text-muted);
    cursor: not-allowed;
}

.field-lock {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: var(--space-1);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Grouped form section — a titled card (e.g. Required vs Optional fields) */
.form-block {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
}

.form-block-title {
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3);
}

.form-block .field:last-child {
    margin-bottom: 0;
}

/* ----- Validation states — set by JS during live checks --------------------- */
.input.is-invalid,
.select.is-invalid,
.textarea.is-invalid {
    border-color: var(--color-danger);
}

.input.is-valid,
.select.is-valid {
    border-color: var(--color-success);
}

/* ----- Checkbox / radio row (e.g. accept terms on registration) ------------- */
.check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
}

.check input {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--color-primary);
    flex-shrink: 0;
}

/* ----- Two-column form row (stacks on mobile) -------------------------------- */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ----- Password strength meter (registration) ---------------------------------
   JS toggles data-strength="weak|fair|good|strong" on .strength. */
.strength {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.strength .strength-bar {
    flex: 1;
    height: 6px;
    border-radius: var(--radius-sm);
    background: var(--color-border);
    overflow: hidden;
}

.strength .strength-fill {
    height: 100%;
    width: 0;
    transition: width var(--transition-fast), background var(--transition-fast);
}

.strength .strength-text {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    min-width: 48px;
    text-align: right;
}

.strength[data-strength="weak"] .strength-fill { width: 25%; background: var(--color-danger); }
.strength[data-strength="fair"] .strength-fill { width: 50%; background: var(--color-warning); }
.strength[data-strength="good"] .strength-fill { width: 75%; background: var(--color-info); }
.strength[data-strength="strong"] .strength-fill { width: 100%; background: var(--color-success); }

/* ----------------------------------------------------------------------------
   Plan picker — searchable list of subscription plans in the "new
   subscription" form. The search field filters the list below it; a chosen
   plan is highlighted. Flat: bordered rows, no shadow.
---------------------------------------------------------------------------- */
.plan-picker {
    position: relative;
}

.plan-picker .plan-picker-list {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    z-index: 20;
    margin-top: 0;
    max-height: 240px;
    overflow-y: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.plan-picker .plan-picker-list[hidden] {
    display: none;
}

.plan-picker .plan-option {
    display: flex;
    flex-direction: column;
    gap: 2px;
    width: 100%;
    text-align: left;
    padding: var(--space-2) var(--space-3);
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
}

.plan-picker .plan-option:last-child {
    border-bottom: none;
}

.plan-picker .plan-option:hover {
    background: var(--color-surface-alt);
}

.plan-picker .plan-option.is-selected {
    background: var(--color-primary-soft, rgba(6, 63, 71, 0.08));
}

.plan-picker .plan-option-name {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
}

.plan-picker .plan-option-meta {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ----------------------------------------------------------------------------
   Info box — a flat, subtle callout used for a short, important note inside a
   form (e.g. "the first charge happens now"). Not an alert; no shadow.
---------------------------------------------------------------------------- */
.info-box {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-3);
    margin: var(--space-4) 0;
    border: 1px solid var(--color-info-border, rgba(59, 130, 246, 0.25));
    background: var(--color-info-soft, rgba(59, 130, 246, 0.07));
    border-radius: var(--radius);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    line-height: 1.45;
}

.info-box i {
    flex: 0 0 auto;
    font-size: 18px;
    color: var(--color-info, #3b82f6);
    margin-top: 1px;
}