*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#09090b;--bg-2:#111113;--bg-3:#18181b;--bg-4:#1f1f23;--surface:#27272a;
  --accent:#3b82f6;--accent-hover:#2563eb;--accent-soft:rgba(59,130,246,.12);
  --text:#fafafa;--text-2:#a1a1aa;--text-3:#71717a;
  --border:#27272a;--border-light:#3f3f46;
  --success:#22c55e;--success-soft:rgba(34,197,94,.1);
  --warning:#f59e0b;--warning-soft:rgba(245,158,11,.1);
  --error:#ef4444;--error-soft:rgba(239,68,68,.1);
  --blue:#3b82f6;--blue-soft:rgba(59,130,246,.1);
  --purple:#a855f7;--purple-soft:rgba(168,85,247,.1);
  --radius:8px;--radius-lg:12px;
  --shadow:0 1px 3px rgba(0,0,0,.3),0 1px 2px rgba(0,0,0,.2);
  --shadow-lg:0 10px 30px rgba(0,0,0,.4);
  --font:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  --font-display:'Space Grotesk',var(--font);
}
html{scrollbar-width:thin;scrollbar-color:var(--surface) var(--bg)}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--surface);border-radius:3px}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}
.hidden{display:none!important}
.app{display:flex;min-height:100vh}

/* ---------- sidebar / shell ---------- */
.sidebar{width:240px;background:var(--bg-2);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:100}
.sidebar-header{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--border)}
.sidebar-logo{width:36px;height:36px;border-radius:8px;flex-shrink:0}
.sidebar-brand{font-family:var(--font-display);font-size:.9rem;font-weight:600;line-height:1.2;color:var(--text)}
.sidebar-nav{padding:12px 10px;display:flex;flex-direction:column;gap:2px}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 12px;color:var(--text-3);text-decoration:none;font-size:.85rem;font-weight:500;border-radius:var(--radius);cursor:pointer;transition:all .15s;position:relative;background:none;border:0;font-family:var(--font)}
.nav-item svg{width:18px;height:18px;flex-shrink:0}
.nav-item:hover{color:var(--text-2);background:var(--bg-3)}
.nav-item.active{color:var(--text);background:var(--bg-4)}
.nav-item.active::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:20px;background:var(--accent);border-radius:0 3px 3px 0}
.sidebar-footer{margin-top:auto;padding:12px 10px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:2px}
.sidebar-link-ext{display:flex;align-items:center;gap:8px;padding:8px 12px;color:var(--text-3);text-decoration:none;font-size:.8rem;border-radius:var(--radius);cursor:pointer;background:none;border:none;font-family:var(--font);transition:all .15s;text-align:left}
.sidebar-link-ext svg{width:14px;height:14px;flex-shrink:0}
.sidebar-link-ext:hover{color:var(--text-2);background:var(--bg-3)}
.sidebar-user-email{font-size:.72rem;color:var(--text-3);padding:6px 12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.main{flex:1;margin-left:240px;display:flex;flex-direction:column;min-height:100vh}
.topbar{position:sticky;top:0;z-index:50;background:rgba(9,9,11,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:0 32px;height:56px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.topbar-left{display:flex;align-items:center;gap:10px;min-width:0}
.topbar-title{font-family:var(--font-display);font-size:1rem;font-weight:600}
.topbar-right{display:flex;align-items:center;gap:8px}
.content{flex:1;padding:28px 32px 40px}
.sidebar-toggle{display:none;background:none;border:0;color:var(--text-2);cursor:pointer;padding:6px;border-radius:var(--radius);transition:all .15s}
.sidebar-toggle:hover{color:var(--text);background:var(--bg-3)}
.sidebar-toggle svg{width:22px;height:22px;display:block}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:90;opacity:0;transition:opacity .2s}
.sidebar-overlay.show{display:block;opacity:1}

/* ---------- language switch ---------- */
.lang-switcher{display:flex;gap:4px;background:var(--bg-3);border-radius:var(--radius);padding:3px}
.lang-btn{background:none;border:0;color:var(--text-3);font-family:var(--font);font-size:.68rem;font-weight:700;padding:5px 8px;border-radius:6px;cursor:pointer;transition:all .15s}
.lang-btn:hover{color:var(--text-2)}
.lang-btn.active{background:var(--bg-4);color:var(--text)}

/* ---------- theme switch ---------- */
.login-controls{display:flex;align-items:center;gap:8px}
.theme-toggle{background:none;border:1px solid var(--border);border-radius:var(--radius);padding:5px 8px;color:var(--text-3);cursor:pointer;font-size:.9rem;line-height:1;transition:all .15s}
.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}
.theme-moon{display:none}
html.light .theme-sun{display:none}
html.light .theme-moon{display:inline}

/* ---------- buttons ---------- */
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-family:var(--font);font-size:.8rem;font-weight:600;cursor:pointer;transition:all .15s;text-decoration:none}
.btn-primary:hover{background:var(--accent-hover);box-shadow:0 0 0 3px var(--accent-soft)}
.btn-primary:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:5px;padding:7px 14px;background:transparent;color:var(--text-2);border:1px solid var(--border);border-radius:var(--radius);font-family:var(--font);font-size:.75rem;font-weight:500;cursor:pointer;transition:all .15s}
.btn-outline:hover{border-color:var(--text-3);color:var(--text);background:var(--bg-3)}
.btn-ghost{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;background:transparent;color:var(--text-3);border:none;border-radius:var(--radius);font-family:var(--font);font-size:.8rem;cursor:pointer;transition:all .15s}
.btn-ghost:hover{color:var(--text);background:var(--bg-3)}
.btn-sm{padding:7px 14px;font-size:.75rem}

/* ---------- cards / layout ---------- */
.card{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
.card-header{padding:14px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:10px}
.card-header h3{font-family:var(--font-display);font-size:.85rem;font-weight:600}
.card-body{padding:16px 18px}
.page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.page-header h2{font-family:var(--font-display);font-size:1.1rem;font-weight:600}
.page-sub{font-size:.78rem;color:var(--text-3);margin-top:3px}
.empty{text-align:center;padding:26px 16px;color:var(--text-3);font-size:.85rem;line-height:1.5}
.empty p+p{margin-top:4px}
.empty .btn-primary{margin-top:14px}
.spinner{width:22px;height:22px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;display:inline-block;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- inputs ---------- */
.input{width:100%;padding:9px 12px;background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-family:var(--font);font-size:.85rem;outline:none;transition:border-color .15s,box-shadow .15s}
.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
select.input{cursor:pointer}
input[type=date].input{color-scheme:dark}

/* ---------- stats ---------- */
.stats-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px;margin-bottom:24px}
.stat-card{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px;transition:border-color .2s}
.stat-card:hover{border-color:var(--border-light)}
.stat-icon{width:34px;height:34px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;margin-bottom:10px}
.stat-icon svg{width:17px;height:17px}
.stat-icon.green{background:var(--success-soft);color:var(--success)}
.stat-icon.blue{background:var(--accent-soft);color:var(--accent)}
.stat-icon.amber{background:var(--warning-soft);color:var(--warning)}
.stat-icon.purple{background:var(--purple-soft);color:var(--purple)}
.stat-value{font-family:var(--font-display);font-size:1.35rem;font-weight:700;line-height:1.1;margin-bottom:3px;overflow-wrap:anywhere}
.stat-value.small{font-size:.95rem}
.stat-label{font-size:.64rem;color:var(--text-3);text-transform:uppercase;letter-spacing:.05em;font-weight:600}

/* ---------- recent sales ---------- */
.recent-list{display:flex;flex-direction:column}
.recent-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid var(--border)}
.recent-row:first-child{padding-top:0}
.recent-row:last-child{border-bottom:0;padding-bottom:0}
.recent-main{min-width:0}
.recent-items{font-size:.85rem;font-weight:500;overflow-wrap:anywhere}
.recent-meta{font-size:.7rem;color:var(--text-3);margin-top:3px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.recent-total{font-family:var(--font-display);font-size:.9rem;font-weight:700;white-space:nowrap}

/* ---------- overview product shortcuts ---------- */
.card-hint{font-size:.7rem;color:var(--text-3)}
.overview-products{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.overview-product{display:flex;flex-direction:column;align-items:center;gap:4px;padding:16px 12px;background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);color:var(--text);font-family:var(--font);cursor:pointer;text-align:center;transition:all .15s;min-height:130px}
.overview-product:hover{border-color:var(--accent);background:var(--accent-soft);transform:translateY(-1px)}
.overview-product:active{transform:scale(.98)}
.overview-product:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.overview-product .product-thumb{width:52px;height:52px;margin-bottom:4px}
.overview-product-name{font-size:.85rem;font-weight:600;line-height:1.25;overflow-wrap:anywhere}
.overview-product-price{font-family:var(--font-display);font-size:.78rem;color:var(--text-3)}

/* ---------- quick sale panel ---------- */
.quick-sale{padding:20px;max-width:430px;margin:0 auto}
.quick-sale-product{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center;padding:18px;background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg)}
.quick-sale-info{display:flex;align-items:center;gap:12px}
.quick-thumb{width:56px;height:56px;border-radius:50%;object-fit:cover;border:1px solid var(--border);flex:none}
.quick-sale-name{font-family:var(--font-display);font-size:1.05rem;font-weight:600;text-align:left}
.quick-sale-price{font-size:.8rem;color:var(--text-3);text-align:left}
.quick-qty-row{display:flex;align-items:center;justify-content:center;gap:18px}
.quick-step{width:48px;height:48px;border-radius:50%;border:1px solid var(--border);background:var(--bg-2);color:var(--text);font-size:1.4rem;font-weight:700;line-height:1;cursor:pointer;transition:all .15s;display:flex;align-items:center;justify-content:center}
.quick-step:hover:not(:disabled){border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.quick-step:active:not(:disabled){transform:scale(.94)}
.quick-step:disabled{opacity:.35;cursor:not-allowed}
.quick-qty-value{font-family:var(--font-display);font-size:1.6rem;font-weight:700;min-width:44px;text-align:center}
.quick-total{display:flex;align-items:baseline;justify-content:space-between;width:100%;border-top:1px solid var(--border);padding-top:14px;font-family:var(--font-display);font-size:1.1rem;font-weight:700}
.quick-payment{margin-top:16px}
.quick-payment .payment-block{margin-top:0;padding-top:0;border-top:0}
.quick-actions{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:16px;flex-wrap:wrap}
.quick-actions .btn-primary{flex:1;min-width:160px;padding:11px}

/* ---------- day navigation / overview actions ---------- */
.page-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.help-btn{padding:7px 10px;font-weight:700;line-height:1}
.day-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:10px 12px;margin:0 auto 20px;max-width:420px}
.day-arrow{width:38px;height:38px;border-radius:10px;border:1px solid var(--border);background:transparent;color:var(--text-2);font-size:1.1rem;cursor:pointer;transition:all .15s;display:flex;align-items:center;justify-content:center;flex:none}
.day-arrow:hover:not(:disabled){border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.day-arrow:disabled{opacity:.35;cursor:not-allowed}
.day-label{display:flex;flex-direction:column;align-items:center;gap:2px;min-width:0}
.day-date{font-family:var(--font-display);font-size:1rem;font-weight:600}
.day-sub{font-size:.7rem;color:var(--text-3)}

/* ---------- POS ---------- */
.pos-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:20px;align-items:start}
.pos-toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:14px 18px;border-bottom:1px solid var(--border)}
.pos-search{flex:1;min-width:160px}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
.product-card{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);padding:14px 10px;text-align:center;cursor:pointer;transition:all .15s;user-select:none}
.product-card:hover{background:var(--bg-4);border-color:var(--border-light)}
.product-card:active{transform:scale(.98)}
.product-card.selected{border-color:rgba(59,130,246,.6);background:var(--accent-soft)}
.product-thumb{width:46px;height:46px;border-radius:50%;object-fit:cover;display:block;margin:0 auto 8px;border:1px solid var(--border);flex:none}
.product-initial{display:flex;align-items:center;justify-content:center;background:var(--bg-4);color:var(--text-3);font-family:var(--font-display);font-weight:700;font-size:1rem}
.product-name{font-size:.82rem;font-weight:600;line-height:1.25;overflow-wrap:anywhere}
.product-price{font-family:var(--font-display);font-size:.74rem;color:var(--text-3);margin-top:2px}
.product-stepper{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:9px}
.product-stepper button{width:24px;height:24px;border-radius:50%;border:none;background:var(--accent);color:#fff;font-weight:700;cursor:pointer;line-height:1;transition:background .15s}
.product-stepper button:hover{background:var(--accent-hover)}
.product-stepper span{font-family:var(--font-display);font-weight:700;font-size:.85rem;min-width:16px}

/* ---------- cart ---------- */
.cart-panel{position:sticky;top:72px}
.cart-lines{display:flex;flex-direction:column}
.cart-line{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px solid var(--border)}
.cart-line:first-child{padding-top:0}
.cart-line-info{display:flex;flex-direction:column;min-width:0}
.cart-line-name{font-size:.82rem;font-weight:600;overflow-wrap:anywhere}
.cart-line-price{font-size:.7rem;color:var(--text-3);margin-top:2px}
.cart-line-right{display:flex;align-items:center;gap:10px;flex:none}
.cart-line-total{font-family:var(--font-display);font-size:.8rem;font-weight:700;white-space:nowrap}
.cart-stepper{display:flex;align-items:center;gap:5px}
.cart-stepper button{width:22px;height:22px;border-radius:6px;border:1px solid var(--border);background:var(--bg-3);color:var(--text-2);cursor:pointer;font-weight:700;line-height:1;transition:all .15s}
.cart-stepper button:hover{border-color:var(--text-3);color:var(--text);background:var(--bg-4)}
.cart-stepper span{font-family:var(--font-display);font-size:.72rem;font-weight:700;min-width:14px;text-align:center}
.cart-subtotal{display:flex;justify-content:space-between;align-items:baseline;padding-top:14px;margin-top:2px;font-family:var(--font-display);font-size:1.2rem;font-weight:700}
.payment-block{margin-top:16px;padding-top:14px;border-top:1px solid var(--border)}
.field-label{font-size:.64rem;font-weight:600;color:var(--text-3);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}
.payment-toggle{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:12px}
.payment-toggle button{padding:9px;border-radius:var(--radius);border:1px solid var(--border);background:transparent;color:var(--text-3);font-family:var(--font);font-size:.78rem;font-weight:600;cursor:pointer;transition:all .15s}
.payment-toggle button:hover{color:var(--text-2);border-color:var(--text-3)}
.payment-toggle button.active{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}
.field-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
.field-row label{font-size:.8rem;color:var(--text-2)}
.field-row input{width:120px;text-align:right;font-family:var(--font-display)}
.change-row{display:flex;justify-content:space-between;align-items:center;font-size:.8rem;color:var(--text-3);padding:8px 10px;background:var(--bg-3);border-radius:var(--radius);border:1px solid var(--border)}
.change-row strong{font-family:var(--font-display);color:var(--success)}
.change-row.bad strong{color:var(--error)}
.cart-confirm{width:100%;margin-top:14px;padding:11px}

/* ---------- products view ---------- */
.products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.product-row{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:14px;display:flex;align-items:center;gap:12px;transition:border-color .15s}
.product-row:hover{border-color:var(--border-light)}
.product-row .product-thumb{width:42px;height:42px;margin:0;flex:none}
.product-row-info{flex:1;min-width:0}
.product-row-name{font-size:.85rem;font-weight:600;overflow-wrap:anywhere}
.product-row-price{font-family:var(--font-display);font-size:.74rem;color:var(--text-3);margin-top:2px}
.product-row-actions{display:flex;gap:2px;flex:none}
.icon-btn{width:28px;height:28px;border-radius:6px;border:1px solid transparent;background:none;color:var(--text-3);cursor:pointer;font-size:.8rem;display:flex;align-items:center;justify-content:center;transition:all .15s;line-height:1}
.icon-btn:hover{background:var(--bg-3);color:var(--text);border-color:var(--border)}
.icon-btn.danger:hover{background:var(--error-soft);color:var(--error);border-color:rgba(239,68,68,.4)}
.archived-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:24px 0 10px;font-size:.68rem;font-weight:600;color:var(--text-3);text-transform:uppercase;letter-spacing:.05em}

/* ---------- history ---------- */
.history-toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:space-between;margin-bottom:14px}
.range-chips{display:flex;gap:6px;flex-wrap:wrap}
.range-chip{padding:5px 12px;border:1px solid var(--border);border-radius:var(--radius);background:transparent;color:var(--text-3);font-family:var(--font);font-size:.72rem;font-weight:600;cursor:pointer;transition:all .15s;white-space:nowrap}
.range-chip:hover{border-color:var(--text-3);color:var(--text-2);background:var(--bg-3)}
.range-chip.active{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}
.history-method{width:auto;min-width:140px;padding:7px 10px;font-size:.75rem}
.date-inputs{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.date-label{display:flex;align-items:center;gap:8px;font-size:.72rem;color:var(--text-3)}
.date-label .input{width:auto;min-width:140px;padding:7px 10px}
.history-summary{display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:12px;font-size:.78rem;color:var(--text-3);flex-wrap:wrap}
.history-summary strong{font-family:var(--font-display);font-size:1rem;color:var(--text)}
.history-table{display:flex;flex-direction:column}
.history-head,.history-row{display:grid;grid-template-columns:120px 1fr 110px 100px 32px;gap:10px;align-items:center;padding:10px 8px}
.history-head{font-size:.62rem;font-weight:600;color:var(--text-3);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border)}
.history-row{border-bottom:1px solid var(--border);font-size:.8rem}
.history-row:last-child{border-bottom:0}
.history-row:nth-child(even){background:rgba(255,255,255,.02)}
.history-date{font-size:.72rem;color:var(--text-3)}
.history-items{color:var(--text-2);overflow-wrap:anywhere}
.method-badge{justify-self:start;font-size:.62rem;padding:3px 9px;border-radius:999px;font-weight:600;white-space:nowrap;display:inline-flex;align-items:center}
.method-badge.cash{background:var(--success-soft);color:var(--success)}
.method-badge.transfer{background:var(--blue-soft);color:var(--blue)}
.history-total{font-family:var(--font-display);font-weight:700;text-align:right;white-space:nowrap}
.history-delete{justify-self:end}

/* ---------- modal ---------- */
#productModal{z-index:220}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.65);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;padding:20px;z-index:200}
.modal-overlay.show{display:flex}
.modal-panel{background:var(--bg-2);border:1px solid var(--border);border-radius:16px;width:100%;max-width:460px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:modalIn .25s cubic-bezier(.16,1,.3,1)}
.sale-modal-panel{max-width:1000px}
.modal-sub{font-size:.72rem;color:var(--text-3);margin-top:2px}
.sale-modal-body{padding:0}
.sale-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;align-items:stretch}
.sale-products{min-width:0;border-right:1px solid var(--border);display:flex;flex-direction:column}
.sale-products .product-grid{padding:16px 18px;overflow-y:auto;max-height:62vh}
.sale-cart{padding:18px;background:var(--bg-2);display:flex;flex-direction:column;max-height:72vh;overflow-y:auto}
.sale-cart-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}
.sale-cart-head h3{font-family:var(--font-display);font-size:.85rem;font-weight:600}
.received-wrap{display:flex;align-items:center;gap:6px}
.received-wrap input{width:104px;text-align:right;font-family:var(--font-display)}
.received-wrap .btn-ghost{padding:5px 8px;font-size:.68rem;white-space:nowrap}
@keyframes modalIn{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}
.modal-header{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:18px 20px;border-bottom:1px solid var(--border)}
.modal-header h2{font-family:var(--font-display);font-size:.95rem;font-weight:600}
.modal-close{width:30px;height:30px;border-radius:50%;border:1px solid var(--border);background:var(--bg-3);color:var(--text-3);cursor:pointer;font-size:.8rem;line-height:1;transition:all .15s}
.modal-close:hover{color:var(--error);border-color:rgba(239,68,68,.5);background:var(--error-soft)}
.modal-body{padding:18px 20px}
.modal-footer{display:flex;justify-content:flex-end;gap:8px;padding:14px 20px;border-top:1px solid var(--border)}
.form-group{margin-bottom:14px}
.form-group:last-child{margin-bottom:0}
.form-group label{display:block;font-size:.64rem;font-weight:600;color:var(--text-3);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}
.image-picker{display:flex;align-items:center;gap:10px}
.image-preview{width:48px;height:48px;border-radius:50%;object-fit:cover;border:1px solid var(--border);flex:none}
.image-preview.hidden{display:none}
input[type=file].input{padding:6px;font-size:.72rem;color:var(--text-3)}

/* ---------- toast ---------- */
.app-toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,18px);background:var(--bg-4);border:1px solid var(--border);color:var(--text);padding:10px 18px;border-radius:14px;font-size:.83rem;font-weight:500;line-height:1.4;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:all .3s cubic-bezier(.16,1,.3,1);z-index:1200;white-space:normal;max-width:min(92vw,520px);text-align:center;overflow-wrap:anywhere}
.app-toast.show{opacity:1;transform:translate(-50%,0)}
.app-toast.error{border-color:rgba(239,68,68,.5);background:#231416;color:#fecaca}

/* ---------- tutorial ---------- */
.tour-overlay{position:fixed;inset:0;z-index:1000}
.tour-overlay.hidden{display:none}
.tour-spotlight{position:fixed;border:2px solid var(--accent);border-radius:12px;box-shadow:0 0 0 9999px rgba(0,0,0,.68);pointer-events:none;transition:top .2s,left .2s,width .2s,height .2s;z-index:1000}
.tour-tooltip{position:fixed;width:min(360px,calc(100vw - 32px));max-height:calc(100vh - 24px);overflow-y:auto;background:var(--bg-2);border:1px solid var(--border-light);border-radius:14px;padding:16px 18px;box-shadow:var(--shadow-lg);z-index:1001;animation:modalIn .2s cubic-bezier(.16,1,.3,1)}
.tour-step{font-size:.62rem;color:var(--accent);text-transform:uppercase;letter-spacing:.06em;font-weight:700;margin-bottom:6px}
.tour-title{font-family:var(--font-display);font-size:1rem;font-weight:600;margin-bottom:6px}
.tour-body{font-size:.8rem;color:var(--text-2);line-height:1.5}
.tour-actions{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:14px}
.tour-actions-right{display:flex;gap:6px}
.tour-btn{padding:7px 12px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text-2);font-family:var(--font);font-size:.75rem;font-weight:600;cursor:pointer;transition:all .15s}
.tour-btn:hover{border-color:var(--text-3);color:var(--text);background:var(--bg-3)}
.tour-btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.tour-btn.primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}
.tour-btn.ghost{border-color:transparent;color:var(--text-3)}
.tour-btn.ghost:hover{color:var(--text-2);background:transparent}

/* ---------- auth ---------- */
.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);padding:20px}
.login-card{width:100%;max-width:380px;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-lg)}
.login-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:24px}
.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--text-3);text-decoration:none;font-size:.78rem;transition:color .15s}
.back-link:hover{color:var(--text-2)}
.login-brand{display:flex;align-items:center;gap:14px;margin-bottom:28px}
.login-icon{width:44px;height:44px;border-radius:10px}
.login-title{font-family:var(--font-display);font-weight:600;font-size:1.1rem;line-height:1.2}
.login-subtitle{font-size:.75rem;color:var(--text-3);margin-top:2px}
.login-tabs{display:flex;gap:4px;margin-bottom:20px;background:var(--bg-3);border-radius:var(--radius);padding:3px}
.login-tab{flex:1;background:none;border:0;padding:8px;border-radius:6px;cursor:pointer;font-family:var(--font);font-size:.8rem;font-weight:500;color:var(--text-3);transition:all .15s}
.login-tab.active{background:var(--bg-4);color:var(--text);box-shadow:var(--shadow)}
.login-error{color:var(--error);font-size:.8rem;margin-bottom:12px;min-height:1em;line-height:1.4}
.login-actions{display:flex;flex-direction:column;gap:8px;margin-top:22px}
.login-actions .btn-primary{width:100%;text-align:center}
.login-footer-link{display:block;text-align:center;margin-top:16px;font-size:.78rem;color:var(--text-3);text-decoration:none;transition:color .15s}
.login-footer-link:hover{color:var(--accent)}

/* ---------- light mode ---------- */
html.light{
  --bg:#f4f6f9;
  --bg-2:#ffffff;
  --bg-3:#f6f8fb;
  --bg-4:#eef2f7;
  --surface:#d9e0e8;
  --accent:#2563eb;
  --accent-hover:#1d4ed8;
  --accent-soft:rgba(37,99,235,.1);
  --text:#1f2937;
  --text-2:#4b5563;
  --text-3:#6b7280;
  --border:#d9e0e8;
  --border-light:#c3ccd8;
  --success:#15803d;
  --success-soft:rgba(21,128,61,.1);
  --warning:#a16207;
  --warning-soft:rgba(161,98,7,.1);
  --error:#b91c1c;
  --error-soft:rgba(185,28,28,.08);
  --blue:#2563eb;
  --blue-soft:rgba(37,99,235,.1);
  --purple:#7c3aed;
  --purple-soft:rgba(124,58,237,.1);
  --shadow:0 1px 3px rgba(15,23,42,.08),0 1px 2px rgba(15,23,42,.06);
  --shadow-lg:0 10px 30px rgba(15,23,42,.12);
}
html.light body{background:var(--bg);color:var(--text)}
html.light .topbar{background:rgba(244,246,249,.85)}
html.light .sidebar-overlay{background:rgba(15,23,42,.28)}
html.light .modal-overlay{background:rgba(244,246,249,.72)}
html.light .app-toast.error{background:#fff1f2;color:#b91c1c;border-color:rgba(185,28,28,.3)}
html.light .history-row:nth-child(even){background:rgba(15,23,42,.02)}
html.light .tour-spotlight{box-shadow:0 0 0 9999px rgba(15,23,42,.38)}
html.light .product-card.selected{border-color:var(--accent)}
html.light input[type=date].input{color-scheme:light}
html.light .login-screen{background:var(--bg)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .pos-layout{grid-template-columns:1fr}
  .cart-panel{position:static}
  .sale-layout{grid-template-columns:1fr}
  .sale-products{border-right:0;border-bottom:1px solid var(--border)}
  .sale-products .product-grid{max-height:none}
  .sale-cart{max-height:none}
}
@media (max-width:768px){
  .sidebar-toggle{display:block}
  .sidebar{transform:translateX(-100%);transition:transform .25s cubic-bezier(.16,1,.3,1);width:260px;z-index:110}
  .sidebar.open{transform:translateX(0)}
  .main{margin-left:0}
  .topbar{padding:0 16px;height:52px}
  .content{padding:16px 14px 32px}
  .stats-row{grid-template-columns:1fr 1fr;gap:10px}
  .stat-card{padding:14px}
  .stat-value{font-size:1.15rem}
  .page-header h2{font-size:1rem}
  .page-actions{width:100%}
  .page-actions .btn-primary,.page-actions .btn-outline{flex:1}
  .day-nav{max-width:none}
  .history-head{display:none}
  .history-row{grid-template-columns:1fr auto;grid-template-areas:"date method" "items items" "total delete";row-gap:5px}
  .history-date{grid-area:date}
  .history-items{grid-area:items}
  .history-row .method-badge{grid-area:method}
  .history-total{grid-area:total;text-align:left;font-size:1rem;padding-top:3px}
  .history-delete{grid-area:delete;justify-self:end;align-self:center}
  .history-method{width:100%}
  .date-label{flex:1 1 100%}
  .date-label .input{flex:1;width:100%}
  .login-card{padding:24px 20px}
  .login-top{margin-bottom:20px}
}
@media (max-width:480px){
  .stats-row{grid-template-columns:1fr}
  #newSaleBtn{display:none}
  .app-toast{white-space:normal;border-radius:16px}
  .products-grid{grid-template-columns:1fr}
  .overview-products{grid-template-columns:1fr 1fr}
  .quick-sale{padding:14px}
  .quick-step{width:44px;height:44px}
}