/* ============================================================
   LD Institutional — front-end order builder
   Scoped under .ldi-builder-wrap so it won't bleed into the active theme.
   ============================================================ */

.ldi-builder-wrap {
    --ldi-accent:        #4f46e5;
    --ldi-accent-hover:  #4338ca;
    --ldi-accent-soft:   #eef2ff;
    --ldi-bg:            #ffffff;
    --ldi-surface:       #fafafa;
    --ldi-surface-up:    #ffffff;
    --ldi-border:        #e5e7eb;
    --ldi-border-strong: #d1d5db;
    --ldi-text:          #0f172a;
    --ldi-text-soft:     #475569;
    --ldi-text-muted:    #94a3b8;
    --ldi-success:       #047857;
    --ldi-success-soft:  #ecfdf5;
    --ldi-radius-md:     10px;
    --ldi-radius-lg:     14px;
    --ldi-space-2:       8px;
    --ldi-space-3:       12px;
    --ldi-space-4:       16px;
    --ldi-space-5:       24px;
    --ldi-shadow-focus:  0 0 0 3px rgba(79, 70, 229, 0.18);
    color: var(--ldi-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
    font-size: 15px;
    line-height: 1.5;
}

.ldi-builder-wrap * { box-sizing: border-box; }
.ldi-builder-wrap h2, .ldi-builder-wrap h3, .ldi-builder-wrap h4 {
    margin: 0; line-height: 1.2; font-weight: 600;
}
.ldi-builder-wrap h2 { font-size: 18px; }
.ldi-builder-wrap h3 { font-size: 16px; }
.ldi-builder-wrap p  { margin: 0; }

.ldi-builder {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: var(--ldi-space-5);
    align-items: flex-start;
}
@media (max-width: 880px) {
    .ldi-builder { grid-template-columns: 1fr; }
}

.ldi-builder__main { display: flex; flex-direction: column; gap: var(--ldi-space-5); }

/* Cards */
.ldi-card {
    background: var(--ldi-surface-up);
    border: 1px solid var(--ldi-border);
    border-radius: var(--ldi-radius-lg);
    padding: 24px;
}
.ldi-card--flush { padding: 0; }
.ldi-card__head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--ldi-border);
}
.ldi-card__body { padding: 24px; }

.ldi-row { display: flex; gap: var(--ldi-space-3); }
.ldi-row--between { justify-content: space-between; align-items: flex-start; }

.ldi-muted { color: var(--ldi-text-muted); font-size: 13px; }
.ldi-dim   { color: var(--ldi-text-soft); font-size: 13px; }
.ldi-num   { font-variant-numeric: tabular-nums; }

/* Billing selector (modules 13/16) — one option per line */
.ldi-billing-types {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
}
.ldi-billing-type {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}
.ldi-billing-type input[type="radio"] {
    margin: 0;
    accent-color: var(--ldi-accent);
}

/* Search */
.ldi-search { position: relative; margin-bottom: 12px; }
.ldi-input {
    width: 100%;
    height: 40px;
    padding: 0 12px;
    font-size: 14px;
    line-height: 1.4;
    color: var(--ldi-text);
    background: var(--ldi-surface-up);
    border: 1px solid var(--ldi-border-strong);
    border-radius: var(--ldi-radius-md);
    transition: border-color 120ms, box-shadow 120ms;
    font-family: inherit;
}
.ldi-input:focus { outline: none; border-color: var(--ldi-accent); box-shadow: var(--ldi-shadow-focus); }

/* Course list — capped height + internal scroll so a large catalogue never
   stretches the page; the search box above stays fixed while results scroll. */
.ldi-course-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    max-height: 380px;
    overflow-y: auto;
    overscroll-behavior: contain;
    border: 1px solid var(--ldi-border);
    border-radius: 8px;
}
.ldi-course-item { border-bottom: 1px solid var(--ldi-border); }
.ldi-course-item:last-child { border-bottom: 0; }
.ldi-course-item label {
    display: grid;
    grid-template-columns: 24px 1fr auto;
    align-items: center;
    gap: var(--ldi-space-3);
    padding: 12px 14px;
    cursor: pointer;
}
.ldi-course-item__title { font-weight: 500; }
.ldi-course-item__price {
    font-variant-numeric: tabular-nums;
    color: var(--ldi-text-soft);
    text-align: right;
}
.ldi-course-item__price strong { color: var(--ldi-text); font-weight: 500; }

.ldi-course-item--unavailable label { cursor: not-allowed; opacity: 0.55; }
.ldi-course-item--unavailable .ldi-check { cursor: not-allowed; }

.ldi-check {
    appearance: none; -webkit-appearance: none;
    width: 18px; height: 18px;
    border: 1px solid var(--ldi-border-strong);
    border-radius: 4px;
    background: var(--ldi-surface-up);
    position: relative;
    cursor: pointer;
    transition: background 120ms, border-color 120ms, box-shadow 120ms;
}
.ldi-check:checked { background: var(--ldi-accent); border-color: var(--ldi-accent); }
.ldi-check:checked::after {
    content: '';
    position: absolute;
    inset: 2px 5px;
    border-right: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: rotate(45deg) translate(-1px, -1px);
}
.ldi-check:focus-visible { outline: none; box-shadow: var(--ldi-shadow-focus); }

/* Stepper */
.ldi-stepper {
    display: inline-flex; align-items: stretch;
    border: 1px solid var(--ldi-border-strong);
    border-radius: var(--ldi-radius-md);
    overflow: hidden;
}
.ldi-stepper__btn {
    width: 40px;
    border: 0;
    background: var(--ldi-surface-up);
    color: var(--ldi-text);
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
}
.ldi-stepper__btn:hover,
.ldi-stepper__btn:focus { background: var(--ldi-border); color: var(--ldi-text); }
.ldi-stepper .ldi-input {
    width: 80px; text-align: center;
    border-left: 1px solid var(--ldi-border);
    border-right: 1px solid var(--ldi-border);
    border-top: 0; border-bottom: 0;
    border-radius: 0;
}
.ldi-min-hint { font-size: 12px; margin-top: 6px; text-align: right; }

/* Empty state */
.ldi-empty { color: var(--ldi-text-soft); font-size: 14px; padding: 8px 0; }

/* Summary */
.ldi-summary { position: sticky; top: 24px; }
.ldi-summary__title { margin-bottom: 12px; }
.ldi-summary__row {
    display: flex; justify-content: space-between;
    padding: 8px 0;
    color: var(--ldi-text-soft);
}
.ldi-summary__row[hidden] { display: none; }
.ldi-summary__row--discount { color: var(--ldi-success); }
.ldi-summary__row--total {
    margin-top: var(--ldi-space-4);
    padding-top: var(--ldi-space-4);
    border-top: 1px solid var(--ldi-border);
    color: var(--ldi-text);
    align-items: baseline;
}
.ldi-summary__row--total .ldi-summary__label { font-weight: 500; }
.ldi-summary__row--total .ldi-summary__value {
    font-size: 28px; font-weight: 600;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
}
.ldi-summary__fineprint { font-size: 12px; color: var(--ldi-text-muted); margin-top: -4px; margin-bottom: 4px; }
.ldi-summary__fineprint[hidden] { display: none; }
.ldi-summary__hint { font-size: 12px; color: var(--ldi-text-muted); margin-top: 8px; }
.ldi-summary__cta-stack { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }

/* Buttons — scoped + raised specificity so themes don't clobber the look */
.ldi-builder-wrap .ldi-btn,
.ldi-builder-wrap a.ldi-btn,
.ldi-builder-wrap button.ldi-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    height: 40px;
    padding: 0 16px;
    border-radius: var(--ldi-radius-md);
    font-size: 14px; font-weight: 500;
    border: 1px solid transparent;
    background: transparent;
    color: var(--ldi-text);
    text-decoration: none;
    cursor: pointer;
    transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
    white-space: nowrap;
    font-family: inherit;
    box-shadow: none;
    text-transform: none;
    letter-spacing: 0;
    outline: 0;
}
.ldi-builder-wrap .ldi-btn:focus-visible {
    outline: none;
    box-shadow: var(--ldi-shadow-focus);
}
.ldi-builder-wrap .ldi-btn--lg    { height: 48px; padding: 0 24px; font-size: 15px; }
.ldi-builder-wrap .ldi-btn--block { width: 100%; }

/* Primary (Proceed to checkout) — anchor + button selectors both, with text-decoration
   pinned and a clear hover lift so themes don't make it look unclickable. */
.ldi-builder-wrap a.ldi-btn--primary,
.ldi-builder-wrap button.ldi-btn--primary {
    background-color: var(--ldi-accent);
    color: #fff;
    border-color: var(--ldi-accent);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
    text-decoration: none;
}
.ldi-builder-wrap a.ldi-btn--primary:hover,
.ldi-builder-wrap button.ldi-btn--primary:hover,
.ldi-builder-wrap a.ldi-btn--primary:focus,
.ldi-builder-wrap button.ldi-btn--primary:focus {
    background-color: var(--ldi-accent-hover);
    border-color: var(--ldi-accent-hover);
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.22);
}
.ldi-builder-wrap a.ldi-btn--primary:active,
.ldi-builder-wrap button.ldi-btn--primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
}
.ldi-builder-wrap a.ldi-btn--primary:visited {
    color: #fff;
}

/* Secondary (Negotiate / etc.) */
.ldi-builder-wrap a.ldi-btn--secondary,
.ldi-builder-wrap button.ldi-btn--secondary {
    background-color: var(--ldi-surface-up);
    border-color: var(--ldi-border-strong);
    color: var(--ldi-text);
    text-decoration: none;
}
.ldi-builder-wrap a.ldi-btn--secondary:hover,
.ldi-builder-wrap button.ldi-btn--secondary:hover,
.ldi-builder-wrap a.ldi-btn--secondary:focus,
.ldi-builder-wrap button.ldi-btn--secondary:focus {
    background-color: var(--ldi-surface);
    border-color: var(--ldi-text-soft);
    color: var(--ldi-text);
    text-decoration: none;
}

.ldi-builder-wrap .ldi-btn[hidden] { display: none !important; }
.ldi-builder-wrap .ldi-btn.hidden  { display: none !important; }
.ldi-builder-wrap .ldi-btn.ldi-loading { opacity: 0.7; pointer-events: none; }

/* Badge */
.ldi-badge {
    display: inline-flex; align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px; font-weight: 500;
    margin-left: 4px;
}
.ldi-badge--success {
    background: var(--ldi-success-soft);
    color: var(--ldi-success);
}

/* Toast */
.ldi-toast {
    margin-top: 12px;
    padding: 8px 12px;
    background: #fef3c7;
    border: 1px solid #fde68a;
    border-radius: 8px;
    color: #92400e;
    font-size: 12px;
}
.ldi-toast[hidden] { display: none; }

/* Volume-pricing tier ladder (Module 03 — buyer-facing list of brackets) */
.ldi-tier-ladder {
    margin-top: var(--ldi-space-4);
    padding-top: var(--ldi-space-4);
    border-top: 1px solid var(--ldi-border);
}
.ldi-tier-ladder__title {
    font-size: 12px;
    font-weight: 600;
    color: var(--ldi-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
}
.ldi-tier-ladder__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.ldi-tier-ladder__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 10px;
    font-size: 13px;
    color: var(--ldi-text-soft);
    border-radius: 8px;
    transition: background-color 140ms ease, color 140ms ease;
}
.ldi-tier-ladder__range { font-variant-numeric: tabular-nums; }
.ldi-tier-ladder__pct {
    font-weight: 600;
    color: var(--ldi-text);
    font-variant-numeric: tabular-nums;
}
.ldi-tier-ladder__row--active {
    background: var(--ldi-accent-soft);
    color: var(--ldi-accent);
}
.ldi-tier-ladder__row--active .ldi-tier-ladder__pct { color: var(--ldi-accent); }
.ldi-tier-ladder__hint {
    margin: 8px 0 0;
    font-size: 12px;
    color: var(--ldi-text-muted);
    font-style: italic;
}
.ldi-tier-ladder__hint[hidden] { display: none; }

/* Shake animation for clamp + invalid */
@keyframes ldi-shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-3px, 0, 0); }
    40%, 60% { transform: translate3d(3px, 0, 0); }
}
.ldi-shake { animation: ldi-shake 320ms linear; }