/* ================================================================
   Velqir PC Builder — v5.4 Professional UI
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
    --bg:     #111111;
    --s1:     #181818;
    --s2:     #202020;
    --s3:     #282828;
    --b1:     #2e2e2e;
    --b2:     #404040;
    --t1:     #f0f0f0;
    --t2:     #888888;
    --t3:     #4a4a4a;
    --white:  #ffffff;
    --black:  #000000;
    --accent: #ffffff;
    --ok:     #4ade80;
    --warn:   #facc15;
    --err:    #f87171;
    --r:      2px;
    --r2:     4px;
}

.pcb-builder *, .pcb-builder *::before, .pcb-builder *::after {
    box-sizing: border-box; margin: 0; padding: 0;
}

/* ── Outer shell ─────────────────────────────────────────────── */
.pcb-builder {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 13px;
    line-height: 1.5;
    background: var(--bg);
    color: var(--t1);
    max-width: 1100px;
    margin: 0 auto;
    border: 1px solid var(--b1);
    border-radius: var(--r2);
    overflow: hidden;
}

/* ── Top bar ─────────────────────────────────────────────────── */
.pcb-header {
    background: var(--black);
    padding: 20px 28px 16px;
    border-bottom: 1px solid var(--b1);
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
}
.pcb-header h2 {
    font-size: 17px; font-weight: 700;
    color: var(--white); letter-spacing: -0.2px;
}
.pcb-header p {
    font-size: 11px; color: var(--t3);
    text-transform: uppercase; letter-spacing: 0.8px;
}

/* ── Step nav bar ────────────────────────────────────────────── */
.pcb-progress {
    display: flex;
    background: var(--black);
    border-bottom: 1px solid var(--b1);
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}
.pcb-progress::-webkit-scrollbar { display: none; }

.pcb-progress-step {
    flex: 1; min-width: 80px;
    display: flex; flex-direction: column; align-items: center;
    gap: 3px; padding: 10px 6px 9px;
    font-size: 9px; font-weight: 600;
    color: var(--t3); text-align: center;
    border-right: 1px solid var(--b1);
    text-transform: uppercase; letter-spacing: 0.5px;
    transition: background 0.1s;
    position: relative;
}
.pcb-progress-step:last-child { border-right: none; }

.pcb-step-num {
    width: 18px; height: 18px; border-radius: 50%;
    border: 1px solid var(--b2); background: var(--s3);
    display: flex; align-items: center; justify-content: center;
    font-size: 9px; font-weight: 700; transition: all 0.15s;
}

.pcb-progress-step.active {
    color: var(--white);
    background: rgba(255,255,255,0.03);
}
.pcb-progress-step.active::after {
    content: '';
    position: absolute; bottom: 0; left: 0; right: 0;
    height: 2px; background: var(--white);
}
.pcb-progress-step.active .pcb-step-num {
    background: var(--white); border-color: var(--white); color: var(--black);
}
.pcb-progress-step.completed { color: var(--t3); }
.pcb-progress-step.completed .pcb-step-num {
    background: var(--s3); border-color: var(--b2); font-size: 0;
}
.pcb-progress-step.completed .pcb-step-num::after { content: '✓'; font-size: 9px; color: var(--t2); }

/* ── Step body ───────────────────────────────────────────────── */
.pcb-steps-container { padding: 0; min-height: 420px; }

.pcb-step-header {
    display: flex; align-items: center; gap: 10px;
    padding: 16px 24px 14px;
    border-bottom: 1px solid var(--b1);
    background: var(--s1);
}
.pcb-step-icon { font-size: 16px; opacity: 0.5; flex-shrink: 0; }
.pcb-step-header h3 { font-size: 14px; font-weight: 600; color: var(--white); }
.pcb-optional-badge {
    font-size: 9px; font-weight: 600; padding: 1px 6px;
    border: 1px solid var(--b2); border-radius: var(--r);
    color: var(--t3); text-transform: uppercase; letter-spacing: 0.5px;
    margin-left: 4px;
}
.pcb-compat-note { font-size: 11px; color: var(--t2); margin-left: auto; text-align: right; max-width: 400px; }

/* ── Compat banner ───────────────────────────────────────────── */
#pcb-builder [id^="pcb-compat-"] {
    display: none;
    padding: 8px 24px;
    font-size: 12px; color: var(--t2); line-height: 1.4;
    border-bottom: 1px solid var(--b1);
    background: var(--s2);
    border-left: 3px solid var(--b2);
}

/* ── Filter toolbar ──────────────────────────────────────────── */
.pcb-filter-bar {
    display: none;
    align-items: center; gap: 12px; flex-wrap: wrap;
    padding: 10px 24px;
    border-bottom: 1px solid var(--b1);
    background: var(--s1);
}
.pcb-filter-bar[style*="flex"], .pcb-filter-bar[style*="block"] {
    display: flex !important;
}
.pcb-sort-select {
    padding: 5px 8px; border: 1px solid var(--b2); border-radius: var(--r);
    font-family: inherit; font-size: 11px; background: var(--s2); color: var(--t1);
    cursor: pointer; outline: none; transition: border-color 0.1s;
}
.pcb-sort-select:focus { border-color: var(--white); }
.pcb-filter-chips { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.pcb-filter-group { display: flex; align-items: center; gap: 4px; }
.pcb-filter-label { font-size: 10px; color: var(--t3); text-transform: uppercase; letter-spacing: 0.5px; white-space: nowrap; margin-right: 2px; }
.pcb-chip {
    display: inline-flex; align-items: center; gap: 3px;
    padding: 3px 8px; border: 1px solid var(--b1); border-radius: var(--r);
    font-size: 11px; font-weight: 500; cursor: pointer;
    background: var(--s2); color: var(--t2);
    transition: all 0.1s; user-select: none; white-space: nowrap;
}
.pcb-chip:has(input:checked) { background: var(--white); border-color: var(--white); color: var(--black); }
.pcb-chip-green:has(input:checked) { background: var(--ok); border-color: var(--ok); color: #000; }
.pcb-chip-red:has(input:checked) { background: var(--err); border-color: var(--err); color: #000; }
.pcb-chip input[type="radio"] { display: none; }
.pcb-filter-showing { font-size: 10px; color: var(--t3); margin-left: auto; }

/* ── Parts grid ──────────────────────────────────────────────── */
.pcb-parts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    padding: 16px 24px;
    background: var(--bg);
}

.pcb-loading, .pcb-empty {
    grid-column: 1/-1; text-align: center;
    padding: 56px 20px; color: var(--t3); font-size: 13px;
}
.pcb-loading { animation: fade 1.4s ease-in-out infinite; }
@keyframes fade { 0%,100%{opacity:1} 50%{opacity:0.35} }

.pcb-error-state {
    grid-column: 1/-1; text-align: center; padding: 48px 20px;
    display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.pcb-error-icon { font-size: 22px; color: var(--warn); }
.pcb-error-state p { font-size: 12px; color: var(--t2); }

/* ═══ PART CARD ════════════════════════════════════════════════ */
.pcb-card {
    background: var(--s1);
    border: 1px solid var(--b1);
    border-radius: 12px;
    cursor: pointer;
    transition: border-color 0.18s, transform 0.18s, box-shadow 0.18s;
    display: flex; flex-direction: column;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.pcb-card:hover {
    border-color: var(--b2);
    transform: translateY(-3px);
    box-shadow: 0 10px 28px rgba(0,0,0,0.5);
}
.pcb-card.is-selected {
    border-color: var(--white);
    border-width: 2px;
    background: var(--s2);
}
.pcb-card.is-incompatible { opacity: 0.4; }
.pcb-card.is-incompatible:hover { opacity: 0.65; border-color: var(--err); transform: none; box-shadow: none; }

/* — Image — */
.pcb-card-img-wrap {
    width: 100%;
    background: var(--s3);
    display: flex; align-items: center; justify-content: center;
    padding: 16px;
    border-bottom: 1px solid var(--b1);
    min-height: 150px;
}
.pcb-part-img {
    width: 100%; max-height: 140px;
    object-fit: contain;
    display: block;
}
.pcb-part-img-placeholder {
    font-size: 3rem; opacity: 0.3;
}

/* — Text — */
.pcb-card-body {
    display: flex; flex-direction: column; gap: 4px;
    padding: 12px 14px; flex: 1;
}
.pcb-card-brand {
    font-size: 10px; font-weight: 700;
    color: var(--t3); text-transform: uppercase; letter-spacing: 0.8px;
}
.pcb-card-name {
    font-size: 13px; font-weight: 600; color: var(--t1); line-height: 1.35;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.pcb-card-specs {
    font-size: 11px; color: var(--t2); line-height: 1.45; margin-top: 1px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* — Compat lines — */
.pcb-compat-lines { display: flex; flex-direction: column; gap: 3px; margin-top: 4px; }
.pcb-compat-warn {
    font-size: 10px; color: var(--err);
    background: rgba(248,113,113,0.08);
    border-radius: var(--r); padding: 3px 7px; line-height: 1.3;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.pcb-compat-note {
    font-size: 10px; color: var(--ok);
    background: rgba(74,222,128,0.07);
    border-radius: var(--r); padding: 3px 7px; line-height: 1.3;
    display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden;
}

/* — Badge — */
.pcb-badge {
    position: absolute; top: 10px; left: 10px;
    font-size: 9px; font-weight: 700; padding: 2px 7px;
    border-radius: 20px; pointer-events: none; z-index: 2;
    text-transform: uppercase; letter-spacing: 0.4px;
}
.pcb-badge-ok  { background: rgba(74,222,128,0.15); color: var(--ok);  border: 1px solid rgba(74,222,128,0.25); }
.pcb-badge-warn{ background: rgba(248,113,113,0.15); color: var(--err); border: 1px solid rgba(248,113,113,0.25); }
.pcb-card.is-selected .pcb-badge { display: none; }

/* — Footer: price + button — */
.pcb-card-footer {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 14px 12px;
    border-top: 1px solid var(--b1);
    gap: 8px;
    margin-top: auto;
}
.pcb-price {
    font-size: 16px; font-weight: 700; color: var(--white);
    font-variant-numeric: tabular-nums; white-space: nowrap;
}
.pcb-price-tbd { font-size: 11px; color: var(--t3); font-weight: 400; font-style: italic; }

/* — Select button — */
.pcb-select-btn {
    font-family: inherit;
    font-size: 11px; font-weight: 600;
    padding: 6px 14px;
    border-radius: 6px;
    border: 1px solid var(--b2);
    background: var(--s3);
    color: var(--t1);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    white-space: nowrap;
    pointer-events: none; /* card click handles it */
}
.pcb-card:hover .pcb-select-btn {
    background: var(--white);
    color: var(--black);
    border-color: var(--white);
}
.pcb-select-btn--selected {
    background: var(--white) !important;
    color: var(--black) !important;
    border-color: var(--white) !important;
}

/* ── Bottom bar (nav) ────────────────────────────────────────── */
.pcb-step-nav {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 24px;
    border-top: 1px solid var(--b1);
    background: var(--s1);
}
.pcb-step-total { font-size: 12px; color: var(--t2); font-variant-numeric: tabular-nums; }
.pcb-step-total strong { color: var(--white); font-weight: 700; }

/* Skip */
.pcb-skip-wrap { text-align: center; padding: 8px 24px; background: var(--bg); border-top: 1px solid var(--b1); }
.pcb-skip-btn {
    background: none; border: none; color: var(--t3);
    font-family: inherit; font-size: 11px; cursor: pointer; transition: color 0.1s;
    padding: 4px 0; text-decoration: underline; text-underline-offset: 3px;
}
.pcb-skip-btn:hover { color: var(--t2); }

/* ── Buttons ─────────────────────────────────────────────────── */
.pcb-btn {
    padding: 8px 16px; border-radius: var(--r);
    font-family: inherit; font-size: 12px; font-weight: 600;
    cursor: pointer; border: none; transition: all 0.1s;
    display: inline-flex; align-items: center; gap: 5px;
    letter-spacing: 0.1px;
}
.pcb-btn:disabled { opacity: 0.2; cursor: not-allowed; }
.pcb-btn-next, .pcb-btn-primary {
    background: var(--white); color: var(--black);
}
.pcb-btn-next:hover:not(:disabled), .pcb-btn-primary:hover:not(:disabled) { background: #e8e8e8; }
.pcb-btn-back {
    background: none; color: var(--t2); border: 1px solid var(--b1);
}
.pcb-btn-back:hover { color: var(--t1); border-color: var(--b2); }
.pcb-btn-secondary {
    background: var(--s2); color: var(--t1); border: 1px solid var(--b1);
}
.pcb-btn-secondary:hover:not(:disabled) { border-color: var(--b2); }

/* Retry */
.pcb-retry-btn {
    background: var(--s2); color: var(--t1); border: 1px solid var(--b1);
    border-radius: var(--r); padding: 6px 14px;
    font-family: inherit; font-size: 11px; font-weight: 600;
    cursor: pointer; transition: all 0.1s;
}
.pcb-retry-btn:hover { border-color: var(--b2); }

/* ── Checkout ────────────────────────────────────────────────── */
.pcb-checkout-header {
    display: flex; align-items: center; gap: 10px;
    padding: 16px 24px 14px;
    border-bottom: 1px solid var(--b1);
    background: var(--s1);
}
.pcb-checkout-header h3 { font-size: 14px; font-weight: 600; color: var(--white); }

.pcb-checkout-body { padding: 20px 24px; }

#pcb-summary-parts {
    border: 1px solid var(--b1); border-radius: var(--r2);
    overflow: hidden; margin-bottom: 16px;
}
.pcb-summary-row {
    display: grid; grid-template-columns: 130px 1fr auto;
    gap: 12px; align-items: center;
    padding: 8px 14px; font-size: 12px;
    border-bottom: 1px solid var(--b1); background: var(--s1);
}
.pcb-summary-row:last-child { border-bottom: none; }
.pcb-summary-cat { font-size: 10px; color: var(--t3); text-transform: uppercase; letter-spacing: 0.5px; }
.pcb-summary-name {
    color: var(--t2);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pcb-summary-price { color: var(--white); font-weight: 600; text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }

.pcb-totals-box {
    border: 1px solid var(--b1); border-radius: var(--r2);
    overflow: hidden; margin-bottom: 16px; max-width: 320px;
}
.pcb-total-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 9px 14px; font-size: 12px; color: var(--t2);
    border-bottom: 1px solid var(--b1); background: var(--s1);
}
.pcb-total-row:last-child { border-bottom: none; background: var(--s2); }
.pcb-grand-total { font-size: 14px; font-weight: 700; color: var(--white); }
.pcb-fee-label { font-size: 9px; color: var(--t3); margin-left: 6px; text-transform: uppercase; }

/* Withdrawal */
#pcb-withdrawal-consent {
    background: var(--s2); border: 1px solid var(--b1);
    border-radius: var(--r2); padding: 12px 14px; margin-bottom: 14px;
}
#pcb-withdrawal-consent.has-error { border-color: var(--err); }
#pcb-withdrawal-consent label {
    display: flex; align-items: flex-start; gap: 10px; cursor: pointer;
}
#pcb-withdrawal-consent label span { font-size: 11px; color: var(--t2); line-height: 1.5; }
#pcb-withdrawal-consent input[type="checkbox"] { margin-top: 2px; flex-shrink: 0; accent-color: var(--white); }
#pcb-checkbox-error { font-size: 10px; color: var(--err); margin: 5px 0 0 22px; }

#pcb-add-to-cart-btn {
    background: var(--white); color: var(--black);
    font-family: inherit; font-size: 13px; font-weight: 700;
    padding: 11px 28px; border: none; border-radius: var(--r);
    cursor: pointer; transition: background 0.1s; letter-spacing: 0.1px;
}
#pcb-add-to-cart-btn:hover:not(:disabled) { background: #e8e8e8; }
#pcb-add-to-cart-btn:disabled { opacity: 0.2; cursor: not-allowed; }

/* ── Sidebar ─────────────────────────────────────────────────── */
.pcb-build-sidebar {
    position: fixed; right: -230px; top: 50%;
    transform: translateY(-50%);
    width: 210px; max-height: 70vh; overflow-y: auto;
    background: var(--s1); border: 1px solid var(--b1);
    border-right: none; border-radius: var(--r2) 0 0 var(--r2);
    padding: 12px; transition: right 0.2s ease; z-index: 999;
}
.pcb-build-sidebar.visible { right: 0; }
.pcb-build-sidebar h4 { font-size: 9px; font-weight: 700; color: var(--t3); text-transform: uppercase; letter-spacing: 0.7px; margin-bottom: 8px; }
.pcb-sidebar-row { display: flex; justify-content: space-between; gap: 8px; padding: 5px 0; border-bottom: 1px solid var(--b1); font-size: 10px; }
.pcb-sidebar-label { color: var(--t2); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pcb-sidebar-price { color: var(--white); font-weight: 600; white-space: nowrap; }
#pcb-sidebar-total { display: flex; justify-content: space-between; margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--b2); font-size: 11px; color: var(--t2); }
#pcb-sidebar-amount { color: var(--white); font-weight: 700; }

/* ── Success ─────────────────────────────────────────────────── */
.pcb-success { text-align: center; padding: 60px 32px; background: var(--bg); }
.pcb-success-icon { font-size: 32px; margin-bottom: 12px; animation: pop 0.35s ease; }
@keyframes pop { from{transform:scale(0)} 80%{transform:scale(1.1)} to{transform:scale(1)} }
.pcb-success h2 { font-size: 20px; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.pcb-success p { font-size: 12px; color: var(--t3); margin-bottom: 18px; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
    .pcb-header { padding: 14px 16px 12px; flex-direction: column; align-items: flex-start; gap: 2px; }
    .pcb-step-header, .pcb-step-nav, .pcb-checkout-body, #pcb-builder [id^="pcb-compat-"] { padding-left: 14px; padding-right: 14px; }
    .pcb-filter-bar { padding-left: 14px; padding-right: 14px; }
    .pcb-parts-grid { grid-template-columns: repeat(2, 1fr); }
    .pcb-summary-row { grid-template-columns: 90px auto; }
    .pcb-summary-name { display: none; }
    .pcb-build-sidebar { display: none; }
    .pcb-totals-box { max-width: 100%; }
}
@media (max-width: 480px) {
    .pcb-progress-step { min-width: 60px; font-size: 8px; padding: 9px 3px 8px; }
    .pcb-parts-grid { grid-template-columns: repeat(2, 1fr); }
    .pcb-part-img { height: 100px; }
    .pcb-btn { padding: 8px 12px; font-size: 11px; }
}
@media (max-width: 360px) {
    .pcb-parts-grid { grid-template-columns: 1fr; }
}