:root{--bg:#f5f7f7;--surface:#fff;--text:#14201f;--muted:#6b7775;--line:#dce5e3;--brand:#0f766e;--brand2:#115e59;--danger:#b42318;--shadow:0 8px 26px rgba(15,23,42,.07)}
*{box-sizing:border-box}html{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}body{margin:0;padding-bottom:82px}
button,input,select,textarea{font:inherit}button{cursor:pointer}.hidden{display:none!important}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:rgba(245,247,247,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.topbar h1{font-size:1.1rem;margin:2px 0 0}.eyebrow{font-size:.72rem;letter-spacing:.12em;font-weight:800;color:var(--brand)}.top-actions{display:flex;gap:8px}.top-actions select{max-width:160px}
main{max-width:1100px;margin:auto;padding:14px}.page{display:none}.page.active{display:block}.page-head{display:flex;justify-content:space-between;align-items:center;margin:8px 0 14px}.page-head h2{margin:3px 0 0;font-size:1.35rem}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:14px;margin-bottom:14px;box-shadow:var(--shadow)}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}.panel h2,.panel h3,.panel h4{margin:0}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px}.stat{text-align:left;border:1px solid var(--line);background:var(--surface);padding:14px;border-radius:16px}.stat span{display:block;font-size:.78rem;color:var(--muted);margin-bottom:8px}.stat strong{font-size:1.15rem}
.primary,.file-btn{border:0;background:var(--brand);color:#fff;border-radius:12px;padding:10px 14px;font-weight:750;display:inline-flex;align-items:center;justify-content:center}.primary:hover{background:var(--brand2)}.ghost{border:0;background:transparent;color:var(--brand);font-weight:700}.small{padding:8px 11px;font-size:.86rem}.full{width:100%;margin-top:12px}.icon-btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 10px}.danger-text{color:var(--danger)}
.search,input,select,textarea{width:100%;border:1px solid var(--line);border-radius:12px;background:#fff;padding:11px 12px;color:var(--text)}textarea{resize:vertical}.toolbar{display:grid;grid-template-columns:1fr 160px;gap:10px;margin-bottom:10px}
.list{display:flex;flex-direction:column;gap:8px}.list.empty{color:var(--muted);font-size:.9rem}.list-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid var(--line)}.list-row:last-child{border-bottom:0}.list-row small{display:block;color:var(--muted);margin-top:3px}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}.product-tile{border:1px solid var(--line);background:#fff;border-radius:14px;padding:12px;text-align:left}.product-tile strong{display:block}.product-tile small{color:var(--muted)}.product-tile .price{margin-top:8px;color:var(--brand);font-weight:800}
.cart-row{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center}.qty{display:flex;align-items:center;gap:6px}.qty button{width:32px;height:32px;border:1px solid var(--line);background:#fff;border-radius:9px}.qty input{width:60px;text-align:center;padding:7px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:12px}.form-grid label{font-size:.8rem;color:var(--muted)}.form-grid .wide{grid-column:1/-1}
.debt-total{display:flex;justify-content:space-between;align-items:center;background:#eaf6f4;border:1px solid #bfe1dd;padding:13px 14px;border-radius:14px;margin-bottom:10px}.customer-list{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}.customer-item{border-bottom:1px solid var(--line)}.customer-item:last-child{border-bottom:0}.customer-summary{display:flex;align-items:center;justify-content:space-between;padding:14px;cursor:pointer}.customer-summary strong:last-child{white-space:nowrap}.customer-detail{padding:14px;border-top:1px solid var(--line);background:#fafcfc}.debt-line{display:flex;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line)}
.stockin-row,.audit-row{display:grid;grid-template-columns:1fr 110px 110px;gap:8px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}.stockin-row small,.audit-row small{display:block;color:var(--muted)}.audit-row{grid-template-columns:1fr 130px}
.assistant-shell{padding:0;overflow:hidden}.chat{height:56vh;min-height:360px;overflow:auto;padding:14px;display:flex;flex-direction:column;gap:9px}.bubble{max-width:85%;padding:10px 12px;border-radius:14px;white-space:pre-wrap}.bubble.user{align-self:flex-end;background:var(--brand);color:#fff}.bubble.ai{align-self:flex-start;background:#eef3f2}.bubble.preview{border:1px solid #9fd1cb;background:#effaf8}.quick-prompts{display:flex;gap:7px;overflow:auto;padding:0 12px 10px}.quick-prompts button{white-space:nowrap;border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 10px}.chat-input{display:grid;grid-template-columns:1fr auto;gap:8px;border-top:1px solid var(--line);padding:12px}
.io-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.row{display:flex;gap:8px}.hint{color:var(--muted);font-size:.85rem}
.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:30;display:grid;grid-template-columns:repeat(7,1fr);background:rgba(255,255,255,.96);border-top:1px solid var(--line);padding:7px max(8px,env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));backdrop-filter:blur(18px)}.nav{border:0;background:transparent;padding:8px 2px;font-size:.72rem;color:var(--muted)}.nav.active{color:var(--brand);font-weight:800}
.modal{position:fixed;inset:0;z-index:60;background:rgba(0,0,0,.35);display:grid;place-items:center;padding:16px}.modal-card{position:relative;background:#fff;border-radius:20px;width:min(560px,100%);max-height:85vh;overflow:auto;padding:18px}.modal-close{position:absolute;right:10px;top:10px;border:0;background:#eef2f1;border-radius:50%;width:34px;height:34px}
.toast{position:fixed;left:50%;bottom:92px;transform:translateX(-50%) translateY(20px);opacity:0;pointer-events:none;z-index:70;background:#17201f;color:#fff;padding:10px 14px;border-radius:12px;transition:.2s}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}.toast.error{background:#9f1c14}
.boot{position:fixed;z-index:100;left:50%;top:18px;transform:translateX(-50%);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:10px 16px;border-radius:999px;font-weight:800}
@media(max-width:800px){.stats{grid-template-columns:repeat(2,1fr)}.product-grid{grid-template-columns:repeat(2,1fr)}.io-grid{grid-template-columns:1fr}.stockin-row{grid-template-columns:1fr 82px 82px}.bottom-nav{overflow-x:auto;grid-template-columns:repeat(7,minmax(64px,1fr))}}
@media(max-width:480px){main{padding:10px}.topbar{padding:12px}.toolbar{grid-template-columns:1fr 125px}.form-grid{grid-template-columns:1fr}.product-grid{grid-template-columns:1fr 1fr}.stat{padding:12px}.stat strong{font-size:1.03rem}}

.payments-mini{display:flex;flex-wrap:wrap;gap:6px;margin-top:7px}
.payment-chip{border:1px solid var(--line);background:#fff;color:var(--brand);border-radius:999px;padding:5px 8px;font-size:.76rem}
.debt-history-block{align-items:flex-start}.debt-main{min-width:0;flex:1}
.ingredient-row small+small{margin-top:2px}

.inventory-direct-note{background:#f0fdfa;border-color:#99d8d1}
.product-manage-row{gap:10px}.product-manage-main{min-width:0;flex:1}
.direct-stock-control{display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.stock-step{width:34px;height:34px;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:1.1rem;font-weight:800;color:var(--brand)}
.stock-value{border:1px solid #9fd1cb;background:#effaf8;border-radius:10px;padding:8px 10px;font-weight:800;color:var(--brand);min-width:88px}
.stock-presets{display:flex;flex-wrap:wrap;gap:7px;margin:10px 0}
@media(max-width:600px){.product-manage-row{align-items:flex-start;flex-direction:column}.direct-stock-control{width:100%;justify-content:flex-start}}

/* v4.3 - danh mục mặt hàng */
.bottom-nav{grid-template-columns:repeat(8,minmax(64px,1fr));overflow-x:auto}
.category-filter-wrap{overflow-x:auto;margin:0 0 10px;padding-bottom:2px}
.category-chips{display:flex;gap:7px;min-width:max-content}
.category-chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 11px;font-weight:700;color:var(--muted)}
.category-chip span{display:inline-flex;align-items:center;justify-content:center;min-width:21px;height:21px;padding:0 5px;margin-left:4px;border-radius:999px;background:#eef3f2;font-size:.72rem}
.category-chip.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.category-chip.active span{background:rgba(255,255,255,.18)}
.product-toolbar{grid-template-columns:minmax(180px,1fr) minmax(135px,180px) minmax(135px,180px)}
.product-summary{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 10px}
.product-summary span{background:#eef7f5;border:1px solid #d1e9e5;border-radius:999px;padding:6px 10px;font-size:.8rem}
.category-badge{display:inline-block;width:max-content;background:#edf4f3;color:var(--brand);border-radius:999px;padding:3px 7px;font-size:.7rem;font-weight:800;margin-bottom:4px}
@media(max-width:700px){.product-toolbar{grid-template-columns:1fr 1fr}.product-toolbar .search{grid-column:1/-1}}

/* v4.4 - công nợ gọn + lọc danh mục toàn app */
.product-filter-bar{display:grid;grid-template-columns:minmax(0,1fr) minmax(140px,190px);gap:9px;align-items:center}
.compact-chips{margin:9px 0 4px;overflow-x:auto;min-width:0}
.debt-compact-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-bottom:14px}
.debt-compact-actions button{width:100%}
.debt-history-title{display:flex;justify-content:space-between;align-items:center;padding:4px 0 8px;border-bottom:1px solid var(--line)}
.debt-history-title span{font-size:.78rem;color:var(--muted)}
.debt-original{font-weight:500;color:var(--muted);font-size:.86rem}
.customer-detail{padding:12px}
.customer-detail .debt-line{padding:11px 0}
@media(max-width:560px){.product-filter-bar{grid-template-columns:1fr}.debt-compact-actions{grid-template-columns:1fr 1fr}}

/* v4.5 */
.product-filter-bar{grid-template-columns:minmax(0,1fr) minmax(140px,190px)}
.product-toolbar{grid-template-columns:minmax(180px,1fr) minmax(135px,180px) minmax(135px,180px)}
.subtabs{display:flex;gap:8px;margin:0 0 12px;padding:4px;background:#eaf3f1;border-radius:14px}
.subtab{flex:1;border:0;background:transparent;border-radius:10px;padding:10px;font-weight:800;color:var(--muted)}
.subtab.active{background:#fff;color:var(--brand);box-shadow:0 2px 8px rgba(0,0,0,.06)}
.subpage{display:none}.subpage.active{display:block}
@media(max-width:760px){.product-filter-bar{grid-template-columns:1fr}.product-toolbar{grid-template-columns:1fr 1fr}.product-toolbar .search{grid-column:1/-1}}

/* v4.7 - category button filters */
.category-filter-main{display:flex;gap:8px;overflow-x:auto;padding:4px 0 8px;margin:4px 0 8px;scrollbar-width:none}
.category-filter-main::-webkit-scrollbar{display:none}
.category-filter-main .category-chip{flex:0 0 auto;padding:9px 13px;font-size:.84rem}
.category-filter-main .category-chip span{margin-left:4px}
.product-filter-bar{grid-template-columns:minmax(0,1fr)}

/* v4.8 Recovery */
.recovery-panel{border:1px solid #f59e0b;background:#fffaf0}
.recovery-preview{padding:10px 0}
.data-safety-banner{position:sticky;top:0;z-index:50;display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:10px 14px;background:#fff3cd;border-bottom:1px solid #f0c36d;color:#7a4d00}
.data-safety-banner.hidden{display:none}
.data-safety-banner span{flex:1;min-width:220px;font-size:.86rem}