/* =====================================================================
   Advanced Pricing Engine Pro — Design System
   Black & White, Clean, Premium, Fully Responsive
===================================================================== */

/* ── CSS Variables ── */
:root {
    --apep-black:   #0a0a0a;
    --apep-white:   #ffffff;
    --apep-border:  #e0e0e0;
    --apep-light:   #f5f5f5;
    --apep-mid:     #888888;
    --apep-danger:  #b91c1c;
    --apep-success: #15803d;
    --apep-radius:  7px;
    --apep-shadow:  0 1px 3px rgba(0,0,0,.08), 0 1px 8px rgba(0,0,0,.04);
    --apep-shadow-h:0 4px 20px rgba(0,0,0,.13);
    --apep-font:    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --apep-mono:    "SFMono-Regular", "Fira Code", Consolas, monospace;
    --apep-transition: .16s cubic-bezier(.4,0,.2,1);
}

/* ── Reset / Base ── */
.apep-wrap { max-width: 1280px; margin: 0 auto; font-family: var(--apep-font); color: var(--apep-black); background: transparent; }
.apep-wrap *, .apep-wrap *::before, .apep-wrap *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Top bar ── */
.apep-topbar {
    display: flex; align-items: flex-start; justify-content: space-between;
    flex-wrap: wrap; gap: 12px; margin-bottom: 20px; padding-bottom: 18px;
    border-bottom: 1px solid var(--apep-border);
}
.apep-page-title { font-size: 1.45rem; font-weight: 800; color: var(--apep-black); line-height: 1.2; }
.apep-sub { font-size: .85rem; color: var(--apep-mid); margin-top: 4px; }
.apep-topbar-actions { display: flex; gap: 10px; align-items: center; flex-shrink: 0; }

/* ── Card ── */
.apep-card {
    background: var(--apep-white);
    border: 1px solid var(--apep-border);
    border-radius: var(--apep-radius);
    padding: 22px 24px;
    box-shadow: var(--apep-shadow);
    margin-bottom: 16px;
}
.apep-card:last-child { margin-bottom: 0; }

/* ── Section title ── */
.apep-section-title {
    font-size: .82rem; font-weight: 800; letter-spacing: .07em;
    text-transform: uppercase; color: var(--apep-black);
    margin-bottom: 16px; padding-bottom: 10px;
    border-bottom: 1.5px solid var(--apep-border);
}
.apep-section-head {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 10px; margin-bottom: 14px;
}
.apep-section-head .apep-section-title { margin-bottom: 0; border-bottom: none; padding-bottom: 0; }

/* ── Fields ── */
.apep-field { display: flex; flex-direction: column; gap: 5px; margin-bottom: 14px; }
.apep-field:last-child { margin-bottom: 0; }
.apep-field label { font-size: .75rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: #555; }
.apep-hint { font-size: .73rem; color: var(--apep-mid); line-height: 1.4; }
.apep-field-grow { flex: 1; }
.apep-field-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }

.apep-field input[type="text"],
.apep-field input[type="number"],
.apep-field select,
.apep-field textarea {
    width: 100%; padding: 9px 12px;
    border: 1px solid var(--apep-border); border-radius: var(--apep-radius);
    font-size: .92rem; color: var(--apep-black); background: var(--apep-white);
    transition: border-color var(--apep-transition), box-shadow var(--apep-transition);
    outline: none; font-family: var(--apep-font);
    appearance: none; -webkit-appearance: none;
}
.apep-field input:focus, .apep-field select:focus, .apep-field textarea:focus {
    border-color: var(--apep-black); box-shadow: 0 0 0 3px rgba(10,10,10,.07);
}
.apep-field textarea { resize: vertical; min-height: 58px; }

/* Combo input (input + type select) */
.apep-input-combo { display: flex; gap: 0; }
.apep-input-combo input { border-radius: var(--apep-radius) 0 0 var(--apep-radius); flex: 1; }
.apep-input-combo .apep-type-sel { border-radius: 0 var(--apep-radius) var(--apep-radius) 0; border-left: none; max-width: 110px; flex-shrink: 0; background: var(--apep-light); }

/* ── Grid ── */
.apep-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
.apep-calc-grid { display: grid; grid-template-columns: 1fr 380px; gap: 16px; align-items: start; }
.apep-calc-left {}
.apep-calc-right {}
.apep-sticky-card { position: sticky; top: 20px; }

/* ── Buttons ── */
.apep-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 9px 20px; border: 1.5px solid var(--apep-black); border-radius: var(--apep-radius);
    font-size: .85rem; font-weight: 700; cursor: pointer; letter-spacing: .02em;
    background: var(--apep-white); color: var(--apep-black); text-decoration: none;
    transition: background var(--apep-transition), color var(--apep-transition),
                border-color var(--apep-transition), box-shadow var(--apep-transition);
    user-select: none; white-space: nowrap;
}
.apep-btn:hover { background: var(--apep-black); color: var(--apep-white); box-shadow: var(--apep-shadow-h); text-decoration: none; }
.apep-btn:active { transform: translateY(1px); }
.apep-btn:disabled { opacity: .5; cursor: not-allowed; pointer-events: none; }

.apep-btn-primary { background: var(--apep-black); color: var(--apep-white); }
.apep-btn-primary:hover { background: #333; border-color: #333; }

.apep-btn-outline { background: transparent; border-color: var(--apep-black); color: var(--apep-black); }

.apep-btn-sm { padding: 5px 13px; font-size: .78rem; }

.apep-btn-danger { border-color: var(--apep-danger); color: var(--apep-danger); }
.apep-btn-danger:hover { background: var(--apep-danger); color: var(--apep-white); border-color: var(--apep-danger); }

.apep-btn-success { border-color: var(--apep-success); color: var(--apep-success); }
.apep-btn-success:hover { background: var(--apep-success); color: var(--apep-white); border-color: var(--apep-success); }

/* ── Tables ── */
.apep-table-scroll { overflow-x: auto; }
.apep-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.apep-table thead th {
    text-align: left; font-size: .72rem; font-weight: 800; text-transform: uppercase;
    letter-spacing: .06em; color: var(--apep-mid); padding: 12px 16px;
    border-bottom: 1.5px solid var(--apep-border); white-space: nowrap; background: var(--apep-white);
}
.apep-table tbody td { padding: 12px 16px; border-bottom: 1px solid var(--apep-border); vertical-align: middle; }
.apep-table tbody tr:last-child td { border-bottom: none; }
.apep-table tbody tr:hover { background: var(--apep-light); }
.apep-strong { font-weight: 800; }
.apep-empty { text-align: center; color: var(--apep-mid); padding: 40px !important; font-size: .9rem; }

/* ── Badges ── */
.apep-badge {
    display: inline-block; padding: 2px 9px; border: 1px solid var(--apep-black);
    border-radius: 20px; font-size: .72rem; font-weight: 700; color: var(--apep-black); background: var(--apep-white);
}
.apep-badge-muted { border-color: var(--apep-border); color: var(--apep-mid); }

/* ── Messages ── */
.apep-msg { font-size: .85rem; font-weight: 700; padding: 8px 14px; border-radius: var(--apep-radius); display: inline-block; }
.apep-msg.success { color: var(--apep-success); background: #f0fdf4; border: 1px solid #bbf7d0; }
.apep-msg.error   { color: var(--apep-danger);  background: #fef2f2; border: 1px solid #fecaca; }
.apep-note { font-size: .85rem; color: var(--apep-mid); }
.apep-loading-note { padding: 20px 0; text-align: center; }

/* ── Code ── */
.apep-code {
    display: inline-block; background: var(--apep-light); border: 1px solid var(--apep-border);
    border-radius: 4px; padding: 2px 8px; font-size: .8rem; font-family: var(--apep-mono); color: var(--apep-black);
}

/* ── Search box ── */
.apep-search-box {
    padding: 8px 14px; border: 1px solid var(--apep-border); border-radius: var(--apep-radius);
    font-size: .88rem; outline: none; min-width: 180px; font-family: var(--apep-font);
    transition: border-color var(--apep-transition);
}
.apep-search-box:focus { border-color: var(--apep-black); }

/* ── Dynamic rows (commissions / location / extras) ── */
.apep-dyn-row {
    display: grid; gap: 8px; align-items: end; margin-bottom: 10px;
    padding: 12px; background: var(--apep-light); border-radius: var(--apep-radius);
    border: 1px solid var(--apep-border);
}
.apep-dyn-row.comm-row { grid-template-columns: 60px 1fr 1fr 1fr auto; }
.apep-dyn-row.loc-row  { grid-template-columns: 80px 1fr 1fr 1fr auto; }
.apep-dyn-row.extra-row{ grid-template-columns: 1fr 1fr 1fr auto; }

.apep-dyn-row label { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: #666; display: block; margin-bottom: 4px; }
.apep-dyn-row input, .apep-dyn-row select {
    width: 100%; padding: 7px 10px; border: 1px solid var(--apep-border);
    border-radius: 5px; font-size: .87rem; color: var(--apep-black);
    background: var(--apep-white); outline: none; font-family: var(--apep-font);
    appearance: none; -webkit-appearance: none;
    transition: border-color var(--apep-transition);
}
.apep-dyn-row input:focus, .apep-dyn-row select:focus { border-color: var(--apep-black); }
.apep-dyn-col { display: flex; flex-direction: column; }
.apep-remove-btn {
    background: none; border: 1.5px solid var(--apep-border); border-radius: 5px;
    color: var(--apep-mid); cursor: pointer; padding: 6px 10px; font-size: .8rem;
    transition: all var(--apep-transition); align-self: flex-end;
}
.apep-remove-btn:hover { border-color: var(--apep-danger); color: var(--apep-danger); background: #fef2f2; }
.apep-level-badge {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border: 2px solid var(--apep-black);
    border-radius: 50%; font-size: .8rem; font-weight: 800; color: var(--apep-black);
    align-self: flex-end; flex-shrink: 0;
}

/* ── Breakdown ── */
.apep-breakdown { border: 1px solid var(--apep-border); border-radius: var(--apep-radius); overflow: hidden; }
.apep-bd-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 9px 16px; border-bottom: 1px solid var(--apep-border);
    font-size: .88rem; color: #333; background: var(--apep-white);
}
.apep-bd-row:last-child { border-bottom: none; }
.apep-bd-label { flex: 1; padding-right: 12px; }
.apep-bd-value { font-weight: 700; white-space: nowrap; font-variant-numeric: tabular-nums; }
.apep-bd-minus .apep-bd-value { color: var(--apep-danger); }
.apep-bd-subtotal { background: var(--apep-light); font-weight: 700; }
.apep-bd-subtotal .apep-bd-value { font-weight: 800; }
.apep-bd-total {
    background: var(--apep-black) !important; color: var(--apep-white) !important;
    font-size: 1rem; font-weight: 800; padding: 14px 16px !important; border-top: 2px solid var(--apep-black);
}
.apep-bd-total .apep-bd-label, .apep-bd-total .apep-bd-value { color: var(--apep-white); font-weight: 800; font-size: 1.05rem; }
.apep-bd-section-head {
    font-size: .7rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
    color: var(--apep-mid); padding: 8px 16px 4px; background: var(--apep-light);
    border-bottom: 1px solid var(--apep-border);
}
/* inline inside table */
tr.apep-bd-row > td > .apep-breakdown { border: none; border-radius: 0; margin: 0; }

/* ── Saved entries list (calc shortcode admin view) ── */
.apep-entry-list { display: flex; flex-direction: column; gap: 0; }
.apep-entry-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; border-bottom: 1px solid var(--apep-border);
    font-size: .88rem; flex-wrap: wrap; gap: 8px; transition: background var(--apep-transition);
}
.apep-entry-item:last-child { border-bottom: none; }
.apep-entry-item:hover { background: var(--apep-light); }
.apep-entry-name { font-weight: 700; flex: 1; }
.apep-entry-price { font-weight: 800; white-space: nowrap; }
.apep-entry-actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* ── Admin area ── */
.apep-admin-header { margin-bottom: 20px; }
.apep-admin-header h1 { font-size: 1.4rem; font-weight: 800; color: #1d2327; margin: 0 0 4px; }
.apep-admin-card {
    background: var(--apep-white); border: 1px solid var(--apep-border);
    border-radius: var(--apep-radius); padding: 24px; box-shadow: var(--apep-shadow); margin-bottom: 16px;
}
.apep-admin-card h3 { color: var(--apep-black); }

/* ── Responsive ── */
@media (max-width: 960px) {
    .apep-calc-grid { grid-template-columns: 1fr; }
    .apep-sticky-card { position: static; }
}
@media (max-width: 680px) {
    .apep-grid-2 { grid-template-columns: 1fr; }
    .apep-dyn-row.comm-row  { grid-template-columns: 1fr 1fr; }
    .apep-dyn-row.loc-row   { grid-template-columns: 1fr 1fr; }
    .apep-dyn-row.extra-row { grid-template-columns: 1fr 1fr; }
    .apep-card { padding: 16px; }
    .apep-table thead { display: none; }
    .apep-table tbody td { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; }
    .apep-table tbody td::before { content: attr(data-label); font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; color: var(--apep-mid); }
    .apep-table tbody tr { display: block; border-bottom: 2px solid var(--apep-border); }
    .apep-topbar { flex-direction: column; }
}
@media (max-width: 420px) {
    .apep-page-title { font-size: 1.15rem; }
    .apep-dyn-row.comm-row, .apep-dyn-row.loc-row, .apep-dyn-row.extra-row { grid-template-columns: 1fr; }
}