/* ==========================================================================
   QuickBuy — stylesheet riêng cho luồng mua nhanh.
   Scope toàn bộ dưới .qb-app để không ảnh hưởng theme admin/client cũ.
   ========================================================================== */

.qb-app {
    --qb-bg: #F5F7FB;
    --qb-card: #FFFFFF;
    --qb-ink: #111827;
    --qb-muted: #6B7280;
    --qb-primary: #2563EB;
    --qb-primary-soft: #EFF4FF;
    --qb-primary-ink: #FFFFFF;
    --qb-border: #E5E7EB;
    --qb-success: #059669;
    --qb-success-soft: #ECFDF5;
    --qb-warn: #D97706;
    --qb-warn-soft: #FFFBEB;
    --qb-danger: #DC2626;
    --qb-danger-soft: #FEF2F2;
    --qb-radius: 16px;
    --qb-radius-sm: 10px;
    --qb-sp: 8px;
    --qb-shadow: 0 1px 2px rgba(17, 24, 39, .04), 0 8px 24px rgba(17, 24, 39, .04);
    --qb-font: 'Be Vietnam Pro', 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;

    margin: 0;
    min-height: 100vh;
    background: var(--qb-bg);
    color: var(--qb-ink);
    font-family: var(--qb-font);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.qb-app *,
.qb-app *::before,
.qb-app *::after { box-sizing: border-box; }

.qb-app h1, .qb-app h2, .qb-app h3, .qb-app h4 {
    margin: 0 0 8px;
    line-height: 1.25;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--qb-ink);
}
.qb-app h1 { font-size: 34px; }
.qb-app h2 { font-size: 22px; }
.qb-app h3 { font-size: 17px; }
.qb-app p  { margin: 0 0 12px; }
.qb-app a  { color: var(--qb-primary); text-decoration: none; }
.qb-app a:hover { text-decoration: underline; }
.qb-app small { color: var(--qb-muted); }

.qb-wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.qb-top {
    position: sticky; top: 0; z-index: 40;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--qb-border);
}
.qb-top__inner {
    display: flex; align-items: center; gap: 24px;
    min-height: 64px;
}
.qb-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--qb-ink); }
.qb-brand:hover { text-decoration: none; }
.qb-brand__mark {
    width: 34px; height: 34px; border-radius: 10px;
    background: var(--qb-primary); color: #fff;
    display: grid; place-items: center; font-size: 16px; font-weight: 700;
}
.qb-nav { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.qb-nav a {
    color: #374151; padding: 10px 12px; border-radius: 10px; font-weight: 500; font-size: 14px;
}
.qb-nav a:hover { background: var(--qb-primary-soft); color: var(--qb-primary); text-decoration: none; }
.qb-nav a.is-active { background: var(--qb-primary-soft); color: var(--qb-primary); }
.qb-top__actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.qb-top__toggle {
    display: none; border: 1px solid var(--qb-border); background: #fff;
    width: 44px; height: 44px; border-radius: 12px; cursor: pointer; color: var(--qb-ink);
    font-size: 20px; line-height: 1;
}

/* ---------- Buttons ---------- */
.qb-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 44px; padding: 10px 18px;
    border-radius: 12px; border: 1px solid transparent;
    background: var(--qb-primary); color: var(--qb-primary-ink);
    font: inherit; font-weight: 600; font-size: 15px;
    cursor: pointer; text-decoration: none;
    transition: transform .06s ease, box-shadow .15s ease, background .15s ease;
}
.qb-btn:hover { text-decoration: none; filter: brightness(1.04); }
.qb-btn:active { transform: translateY(1px); }
.qb-btn:focus-visible,
.qb-app a:focus-visible,
.qb-app input:focus-visible,
.qb-app textarea:focus-visible,
.qb-app select:focus-visible {
    outline: 3px solid rgba(37, 99, 235, .35);
    outline-offset: 2px;
}
.qb-btn[disabled], .qb-btn.is-disabled { opacity: .55; cursor: not-allowed; filter: none; }
.qb-btn--ghost { background: #fff; color: var(--qb-ink); border-color: var(--qb-border); }
.qb-btn--ghost:hover { border-color: #CBD5E1; background: #F9FAFB; }
.qb-btn--soft { background: var(--qb-primary-soft); color: var(--qb-primary); }
.qb-btn--block { width: 100%; }
.qb-btn--sm { min-height: 38px; padding: 6px 12px; font-size: 13px; border-radius: 10px; }

/* ---------- Hero ---------- */
.qb-hero { padding: 48px 0 28px; }
.qb-hero__grid {
    display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center;
}
.qb-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 12px; border-radius: 999px;
    background: var(--qb-primary-soft); color: var(--qb-primary);
    font-size: 13px; font-weight: 600; margin-bottom: 16px;
}
.qb-hero h1 { font-size: 40px; margin-bottom: 14px; }
.qb-hero h1 span { color: var(--qb-primary); }
.qb-hero__lead { font-size: 16px; color: #374151; max-width: 540px; margin-bottom: 24px; }

.qb-search { display: flex; gap: 8px; max-width: 560px; }
.qb-search input { flex: 1; }
.qb-hero__hint { margin-top: 12px; font-size: 13px; color: var(--qb-muted); }

.qb-hero__panel {
    background: var(--qb-card); border: 1px solid var(--qb-border);
    border-radius: var(--qb-radius); box-shadow: var(--qb-shadow); padding: 20px;
}
.qb-hero__panel h3 { font-size: 15px; margin-bottom: 12px; }
.qb-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.qb-steps li { display: flex; gap: 12px; align-items: flex-start; font-size: 14px; color: #374151; }
.qb-steps__n {
    flex: 0 0 26px; width: 26px; height: 26px; border-radius: 8px;
    background: var(--qb-primary-soft); color: var(--qb-primary);
    display: grid; place-items: center; font-size: 13px; font-weight: 700;
}

/* ---------- Sections ---------- */
.qb-section { padding: 28px 0; }
.qb-section__head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.qb-section__head p { margin: 0; color: var(--qb-muted); font-size: 14px; }

/* ---------- Platform tiles ---------- */
.qb-platforms { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.qb-platform {
    display: flex; align-items: center; gap: 14px;
    background: var(--qb-card); border: 1px solid var(--qb-border);
    border-radius: var(--qb-radius); padding: 16px 18px;
    color: var(--qb-ink); box-shadow: var(--qb-shadow);
    transition: border-color .15s ease, transform .12s ease;
}
.qb-platform:hover { border-color: #BFD3FF; text-decoration: none; transform: translateY(-2px); }
.qb-platform__icon {
    width: 44px; height: 44px; border-radius: 12px; flex: 0 0 44px;
    background: var(--qb-primary-soft); color: var(--qb-primary);
    display: grid; place-items: center; font-weight: 700; font-size: 15px; overflow: hidden;
}
.qb-platform__icon img { width: 100%; height: 100%; object-fit: contain; }
.qb-platform__name { font-weight: 600; font-size: 15px; line-height: 1.3; }
.qb-platform__meta { font-size: 12.5px; color: var(--qb-muted); }
.qb-platform__arrow { margin-left: auto; color: #9CA3AF; }

/* ---------- Cards / service list ---------- */
.qb-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.qb-card {
    background: var(--qb-card); border: 1px solid var(--qb-border);
    border-radius: var(--qb-radius); box-shadow: var(--qb-shadow);
    padding: 18px; display: flex; flex-direction: column; gap: 12px;
}
.qb-card__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.qb-card__name { font-size: 15px; font-weight: 600; line-height: 1.4; margin: 0; }
.qb-card__name a { color: var(--qb-ink); }
.qb-card__meta { display: flex; flex-wrap: wrap; gap: 6px; }
.qb-card__price { display: flex; align-items: baseline; gap: 6px; }
.qb-card__price strong { font-size: 20px; font-weight: 700; }
.qb-card__price span { font-size: 12.5px; color: var(--qb-muted); }
.qb-card__range { font-size: 13px; color: var(--qb-muted); }
.qb-card__actions { margin-top: auto; display: flex; gap: 8px; }
.qb-card__actions .qb-btn { flex: 1; }

.qb-chip {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 8px; border-radius: 999px;
    background: #F3F4F6; color: #374151; font-size: 12px; font-weight: 500;
    white-space: nowrap;
}
.qb-chip--primary { background: var(--qb-primary-soft); color: var(--qb-primary); }
.qb-chip--success { background: var(--qb-success-soft); color: var(--qb-success); }
.qb-chip--warn { background: var(--qb-warn-soft); color: var(--qb-warn); }
.qb-chip--danger { background: var(--qb-danger-soft); color: var(--qb-danger); }

/* ---------- Forms ---------- */
.qb-field { display: grid; gap: 6px; margin-bottom: 16px; }
.qb-field label { font-size: 14px; font-weight: 600; }
.qb-field .qb-help { font-size: 12.5px; color: var(--qb-muted); }
.qb-app input[type=text],
.qb-app input[type=url],
.qb-app input[type=number],
.qb-app input[type=email],
.qb-app input[type=tel],
.qb-app input[type=password],
.qb-app textarea,
.qb-app select {
    width: 100%; min-height: 44px; padding: 10px 12px;
    border: 1px solid var(--qb-border); border-radius: 12px;
    background: #fff; color: var(--qb-ink); font: inherit; font-size: 15px;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.qb-app textarea { min-height: 120px; resize: vertical; line-height: 1.55; }
.qb-app input:hover, .qb-app textarea:hover, .qb-app select:hover { border-color: #CBD5E1; }
.qb-app input:focus, .qb-app textarea:focus, .qb-app select:focus {
    border-color: var(--qb-primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, .12); outline: none;
}
.qb-error { color: var(--qb-danger); font-size: 13px; min-height: 18px; }
.qb-hint { color: var(--qb-muted); font-size: 13px; }

.qb-qty { display: flex; align-items: center; gap: 8px; }
.qb-qty input { text-align: center; }
.qb-qty .qb-btn { min-width: 44px; padding: 0; }

.qb-presets { display: flex; flex-wrap: wrap; gap: 8px; }
.qb-presets button {
    min-height: 36px; padding: 4px 12px; border-radius: 999px;
    border: 1px solid var(--qb-border); background: #fff; color: #374151;
    font: inherit; font-size: 13px; font-weight: 500; cursor: pointer;
}
.qb-presets button:hover { border-color: var(--qb-primary); color: var(--qb-primary); }

/* ---------- Layout: service / checkout ---------- */
.qb-split { display: grid; grid-template-columns: 240px 1fr; gap: 24px; align-items: start; }
.qb-split--buy { grid-template-columns: 1fr 340px; }

.qb-side {
    background: var(--qb-card); border: 1px solid var(--qb-border);
    border-radius: var(--qb-radius); padding: 14px; position: sticky; top: 88px;
}
.qb-side h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--qb-muted); margin: 4px 8px 10px; }
.qb-side ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.qb-side a {
    display: flex; justify-content: space-between; align-items: center; gap: 8px;
    padding: 9px 10px; border-radius: 10px; color: #374151; font-size: 14px;
}
.qb-side a:hover { background: #F3F4F6; text-decoration: none; }
.qb-side a.is-active { background: var(--qb-primary-soft); color: var(--qb-primary); font-weight: 600; }
.qb-side a span { font-size: 12px; color: var(--qb-muted); }

.qb-panel {
    background: var(--qb-card); border: 1px solid var(--qb-border);
    border-radius: var(--qb-radius); box-shadow: var(--qb-shadow); padding: 22px;
}
.qb-panel + .qb-panel { margin-top: 16px; }
.qb-panel__head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 16px; }

/* ---------- Summary ---------- */
.qb-summary { position: sticky; top: 88px; }
.qb-summary__rows { display: grid; gap: 8px; margin: 0 0 16px; }
.qb-row { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; color: #374151; }
.qb-row--total {
    border-top: 1px dashed var(--qb-border); margin-top: 8px; padding-top: 12px;
    font-size: 17px; font-weight: 700; color: var(--qb-ink);
}
.qb-row small { color: var(--qb-muted); }
.qb-note {
    font-size: 13px; color: #4B5563; background: #F9FAFB;
    border: 1px solid var(--qb-border); border-radius: 12px; padding: 10px 12px;
}

/* ---------- Alerts ---------- */
.qb-alert {
    display: flex; gap: 10px; align-items: flex-start;
    border-radius: 12px; padding: 12px 14px; font-size: 14px;
    border: 1px solid transparent; margin-bottom: 16px;
}
.qb-alert--info { background: var(--qb-primary-soft); border-color: #D6E4FF; color: #1E40AF; }
.qb-alert--success { background: var(--qb-success-soft); border-color: #C7F0DF; color: #065F46; }
.qb-alert--warn { background: var(--qb-warn-soft); border-color: #FDE8BC; color: #92400E; }
.qb-alert--danger { background: var(--qb-danger-soft); border-color: #FBD5D5; color: #991B1B; }
.qb-alert svg { flex: 0 0 18px; margin-top: 2px; }

.qb-empty { text-align: center; padding: 48px 20px; color: var(--qb-muted); }
.qb-empty h3 { color: var(--qb-ink); margin-bottom: 8px; }
.qb-skeleton {
    background: linear-gradient(90deg, #EEF1F6 25%, #F6F8FB 37%, #EEF1F6 63%);
    background-size: 400% 100%; animation: qb-shimmer 1.3s ease-in-out infinite;
    border-radius: 10px; min-height: 14px;
}
@keyframes qb-shimmer { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

/* ---------- Pay page ---------- */
.qb-pay { display: grid; grid-template-columns: 380px 1fr; gap: 20px; align-items: start; }
.qb-qr {
    background: #fff; border: 1px solid var(--qb-border); border-radius: var(--qb-radius);
    padding: 18px; text-align: center;
}
.qb-qr svg { width: 100%; max-width: 260px; height: auto; display: block; margin: 0 auto; }
.qb-qr__fallback {
    border: 1px dashed var(--qb-border); border-radius: 12px; padding: 20px;
    font-size: 13px; color: var(--qb-muted); word-break: break-all;
}
.qb-copy { display: flex; align-items: center; gap: 8px; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--qb-border); }
.qb-copy:last-child { border-bottom: 0; }
.qb-copy__label { font-size: 13px; color: var(--qb-muted); }
.qb-copy__value { font-weight: 600; font-size: 15px; text-align: right; word-break: break-word; }
.qb-copy button {
    border: 1px solid var(--qb-border); background: #fff; color: #374151;
    border-radius: 8px; min-height: 34px; padding: 4px 10px; font: inherit; font-size: 12.5px; cursor: pointer;
}
.qb-copy button:hover { border-color: var(--qb-primary); color: var(--qb-primary); }
.qb-countdown { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--qb-warn); }

.qb-timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.qb-timeline li { display: flex; gap: 12px; }
.qb-timeline__dot {
    flex: 0 0 22px; width: 22px; height: 22px; border-radius: 50%;
    border: 2px solid var(--qb-border); background: #fff; display: grid; place-items: center;
    font-size: 11px; color: var(--qb-muted); font-weight: 700;
}
.qb-timeline li.is-done .qb-timeline__dot { background: var(--qb-success); border-color: var(--qb-success); color: #fff; }
.qb-timeline li.is-current .qb-timeline__dot { border-color: var(--qb-primary); color: var(--qb-primary); }
.qb-timeline__label { font-weight: 600; font-size: 14px; }
.qb-timeline__meta { font-size: 13px; color: var(--qb-muted); }

/* ---------- Table ---------- */
.qb-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.qb-table th, .qb-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--qb-border); vertical-align: top; }
.qb-table th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--qb-muted); font-weight: 600; }
.qb-table tr:last-child td { border-bottom: 0; }

/* ---------- Footer ---------- */
.qb-foot { margin-top: 40px; border-top: 1px solid var(--qb-border); background: #fff; }
.qb-foot__inner { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; padding: 24px 0; font-size: 13px; color: var(--qb-muted); }
.qb-foot a { color: #4B5563; }

/* ---------- Search results / catalog topbar ---------- */
.qb-toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 18px; }
.qb-toolbar .qb-search { flex: 1 1 260px; max-width: none; }
.qb-toolbar select { width: auto; min-width: 170px; }
.qb-result-count { font-size: 13px; color: var(--qb-muted); }

.qb-pager { display: flex; gap: 6px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }
.qb-pager a, .qb-pager span {
    min-width: 40px; height: 40px; padding: 0 12px; display: grid; place-items: center;
    border: 1px solid var(--qb-border); border-radius: 10px; background: #fff; color: #374151; font-size: 14px;
}
.qb-pager a:hover { border-color: var(--qb-primary); color: var(--qb-primary); text-decoration: none; }
.qb-pager .is-current { background: var(--qb-primary); border-color: var(--qb-primary); color: #fff; font-weight: 600; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .qb-hero__grid { grid-template-columns: 1fr; gap: 24px; }
    .qb-hero h1 { font-size: 32px; }
    .qb-platforms { grid-template-columns: repeat(3, 1fr); }
    .qb-grid { grid-template-columns: repeat(2, 1fr); }
    .qb-split, .qb-split--buy { grid-template-columns: 1fr; }
    .qb-side { position: static; }
    .qb-summary { position: static; }
    .qb-pay { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .qb-app { font-size: 15px; }
    .qb-wrap { padding: 0 16px; }
    .qb-top__inner { min-height: 60px; gap: 12px; }
    .qb-nav {
        display: none; position: absolute; left: 0; right: 0; top: 60px;
        background: #fff; border-bottom: 1px solid var(--qb-border);
        flex-direction: column; align-items: stretch; padding: 8px 16px 16px; gap: 2px;
    }
    .qb-nav.is-open { display: flex; }
    .qb-top__toggle { display: grid; }
    .qb-top__actions .qb-btn { min-height: 40px; padding: 8px 12px; font-size: 14px; }
    .qb-hero { padding: 32px 0 16px; }
    .qb-hero h1 { font-size: 27px; }
    .qb-hero__lead { font-size: 15px; }
    .qb-search { flex-direction: column; }
    .qb-search .qb-btn { width: 100%; }
    .qb-platforms { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .qb-platform { padding: 12px; gap: 10px; }
    .qb-platform__icon { width: 38px; height: 38px; flex-basis: 38px; }
    .qb-grid { grid-template-columns: 1fr; }
    .qb-panel { padding: 16px; }
    .qb-section { padding: 20px 0; }
    .qb-table thead { display: none; }
    .qb-table tr { display: grid; gap: 4px; padding: 12px 0; border-bottom: 1px solid var(--qb-border); }
    .qb-table td { border: 0; padding: 2px 0; }
}

@media (max-width: 400px) {
    .qb-platforms { grid-template-columns: 1fr; }
    .qb-hero h1 { font-size: 24px; }
}

@media (prefers-reduced-motion: reduce) {
    .qb-app *, .qb-app *::before, .qb-app *::after {
        animation-duration: .001ms !important; transition-duration: .001ms !important;
    }
}