*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:#0a0a0a;color:#fff;-webkit-font-smoothing:antialiased;overscroll-behavior:none}
::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#333;border-radius:4px}
input[type=number]::-webkit-inner-spin-button,input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
input[type=number]{-moz-appearance:textfield}

.glass{background:rgba(26,26,26,.7);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.06);border-radius:16px;box-shadow:0 4px 30px rgba(0,0,0,.3),inset 0 1px 0 rgba(255,255,255,.04)}
.btn{display:flex;align-items:center;justify-content:center;border:none;cursor:pointer;font-family:inherit;border-radius:14px;font-weight:600;transition:all .2s;min-height:52px;min-width:52px;-webkit-user-select:none;user-select:none}
.btn:active{transform:scale(.95)}

@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeIn .3s ease-out}
.slide-up{animation:slideUp .4s ease-out}

/* Header */
.header{position:sticky;top:0;z-index:40;background:rgba(10,10,10,.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,.04);padding:16px}
.header-inner{max-width:480px;margin:0 auto}
.brand{display:flex;align-items:center;justify-content:space-between}
.brand-left{display:flex;align-items:center;gap:10px}
.brand-icon{width:36px;height:36px;border-radius:12px;background:linear-gradient(135deg,#FF6B6B,#ff5252);display:flex;align-items:center;justify-content:center;font-size:16px;box-shadow:0 4px 16px rgba(255,107,107,.2)}
.brand h1{font-size:15px;font-weight:700;line-height:1.2}
.brand-sub{font-size:10px;color:#666;font-weight:500;text-transform:uppercase;letter-spacing:2px}
.badge{display:flex;align-items:center;gap:5px;padding:5px 12px;border-radius:20px;font-size:10px;font-weight:600;letter-spacing:.5px}
.badge.demo{background:rgba(245,158,11,.1);color:#f59e0b;border:1px solid rgba(245,158,11,.2)}
.badge.online{background:rgba(34,197,94,.1);color:#22c55e;border:1px solid rgba(34,197,94,.2)}
.datetime{display:flex;justify-content:space-between;align-items:center;margin-top:12px;font-size:12px;color:#666}
.datetime .time{font-family:'Inter',monospace;color:rgba(255,107,107,.8);font-variant-numeric:tabular-nums}

/* Main */
main{padding:8px 16px 120px;max-width:480px;margin:0 auto}

/* Sections */
.section{padding:20px;margin-bottom:16px}
.section-title{font-size:12px;font-weight:600;color:#888;text-transform:uppercase;letter-spacing:2px;margin-bottom:16px}
.section-title span{color:#FF6B6B;text-transform:none;letter-spacing:0}

/* Responsable grid */
.resp-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.resp-btn{display:flex;flex-direction:column;align-items:center;gap:4px;padding:16px 12px;border-radius:16px;border:1px solid rgba(255,255,255,.06);background:#111;color:#999;font-size:13px;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit}
.resp-btn:active{transform:scale(.95)}
.resp-btn .emoji{font-size:28px}
.resp-btn .cat{font-size:10px;font-weight:400;color:#555}
.resp-btn.active{background:#FF6B6B;color:#fff;border-color:transparent;box-shadow:0 8px 24px rgba(255,107,107,.25);transform:scale(1.02)}
.resp-btn.active .cat{color:rgba(255,255,255,.7)}

/* Product list */
.prod-list{display:flex;flex-direction:column;gap:8px}
.prod-btn{display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:14px;border:1px solid rgba(255,255,255,.04);background:rgba(17,17,17,.5);color:#999;font-size:13px;font-weight:500;cursor:pointer;transition:all .2s;font-family:inherit;text-align:left;width:100%}
.prod-btn:active{transform:scale(.98)}
.prod-btn .dot{width:8px;height:8px;border-radius:50%;background:#333;flex-shrink:0;transition:background .2s}
.prod-btn.active{background:rgba(255,107,107,.12);color:#FF6B6B;border-color:rgba(255,107,107,.3);box-shadow:0 0 20px rgba(255,107,107,.1)}
.prod-btn.active .dot{background:#FF6B6B}

/* Movement toggle */
.mov-row{display:flex;gap:12px;margin-bottom:24px}
.mov-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:16px;border-radius:14px;border:1px solid rgba(255,255,255,.06);background:rgba(17,17,17,.5);color:#666;font-size:13px;font-weight:700;cursor:pointer;transition:all .2s;font-family:inherit}
.mov-btn:active{transform:scale(.95)}
.mov-btn.ingreso{background:rgba(34,197,94,.12);color:#4ade80;border:2px solid rgba(34,197,94,.35)}
.mov-btn.egreso{background:rgba(239,68,68,.12);color:#f87171;border:2px solid rgba(239,68,68,.35)}

/* Quantity */
.qty-row{display:flex;align-items:center;justify-content:center;gap:16px}
.qty-btn{width:64px;height:64px;border-radius:16px;background:#111;border:1px solid rgba(255,255,255,.06);color:#999;font-size:24px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s;font-family:inherit}
.qty-btn:active{background:rgba(255,107,107,.1);border-color:rgba(255,107,107,.3);color:#fff}
.qty-input{width:96px;height:64px;text-align:center;font-size:28px;font-weight:700;background:rgba(17,17,17,.5);border:1px solid rgba(255,255,255,.08);border-radius:16px;color:#fff;font-family:inherit;outline:none;transition:all .2s}
.qty-input:focus{border-color:rgba(255,107,107,.5);box-shadow:0 0 0 3px rgba(255,107,107,.15)}
.qty-label{text-align:center;font-size:10px;color:#555;font-weight:500;margin-top:8px;letter-spacing:1px}

/* Submit area */
.submit-row{display:flex;gap:12px;margin-bottom:16px}
.reset-btn{padding:0 20px;border-radius:16px;background:#111;border:1px solid rgba(255,255,255,.06);color:#666;font-size:18px;cursor:pointer;display:flex;align-items:center;transition:all .2s;min-height:56px;font-family:inherit}
.reset-btn:active{color:#fff}
.submit-btn{flex:1;padding:16px;border-radius:16px;border:none;background:linear-gradient(135deg,#FF6B6B,#ff5252);color:#fff;font-size:15px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;box-shadow:0 8px 24px rgba(255,107,107,.25);transition:all .3s;font-family:inherit;min-height:56px}
.submit-btn:active{transform:scale(.98);box-shadow:0 4px 12px rgba(255,107,107,.3)}
.submit-btn:disabled{background:#333;color:#666;box-shadow:none;cursor:wait}

/* Summary preview */
.summary{padding:16px}
.summary-header{display:flex;justify-content:space-between;font-size:11px;color:#666;margin-bottom:8px}
.summary-body{display:flex;align-items:center;gap:12px}
.summary-body .emoji{font-size:20px}
.summary-info{flex:1;min-width:0}
.summary-info p{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.summary-info small{font-size:11px;color:#666}
.summary-amount{text-align:right}
.summary-amount p{font-size:20px;font-weight:700;font-variant-numeric:tabular-nums}
.summary-amount small{font-size:10px;text-transform:uppercase;letter-spacing:1px}
.green{color:#4ade80}
.red{color:#f87171}
.amber{color:#facc15}

/* Bottom nav */
.nav{position:fixed;bottom:0;left:0;right:0;z-index:50;background:rgba(10,10,10,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid rgba(255,255,255,.06)}
.nav-inner{max-width:480px;margin:0 auto;display:flex;justify-content:space-around;align-items:center;height:72px;padding:0 8px}
.nav-btn{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 20px;border-radius:16px;border:none;background:transparent;color:#666;font-size:11px;font-weight:500;cursor:pointer;transition:all .3s;font-family:inherit}
.nav-btn.active{color:#FF6B6B;background:rgba(255,107,107,.1)}
.nav-btn svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.nav-btn.active svg{stroke-width:2.5}

/* Inventory view */
.filter-row{display:flex;gap:8px;overflow-x:auto;padding-bottom:12px;margin:0 -16px;padding-left:16px;padding-right:16px;scrollbar-width:none;-ms-overflow-style:none}
.filter-row::-webkit-scrollbar{display:none}
.filter-pill{flex-shrink:0;padding:8px 16px;border-radius:20px;font-size:12px;font-weight:600;border:1px solid rgba(255,255,255,.06);background:#111;color:#666;cursor:pointer;transition:all .2s;font-family:inherit;white-space:nowrap}
.filter-pill.active{background:#FF6B6B;color:#fff;border-color:transparent}

.inv-group{margin-bottom:12px;overflow:hidden}
.inv-group-header{display:flex;align-items:center;gap:8px;padding:12px 16px;background:rgba(255,255,255,.02);border-bottom:1px solid rgba(255,255,255,.04)}
.inv-group-header .name{font-size:13px;font-weight:700}
.inv-group-header .count{margin-left:auto;font-size:10px;color:#555;font-weight:500}
.inv-item{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.03)}
.inv-item:last-child{border-bottom:none}
.inv-item .prod-name{font-size:13px;color:#ccc;font-weight:500}
.inv-item .stock{font-size:15px;font-weight:700;font-variant-numeric:tabular-nums}
.inv-item .warn{margin-right:6px;color:#facc15;font-size:13px}

/* History */
.hist-item{display:flex;align-items:center;gap:12px;padding:14px 16px;margin-bottom:8px}
.hist-icon{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:18px}
.hist-icon.in{background:rgba(34,197,94,.1)}
.hist-icon.out{background:rgba(239,68,68,.1)}
.hist-info{flex:1;min-width:0}
.hist-info p{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hist-info small{font-size:11px;color:#666}
.hist-amount{text-align:right;font-size:18px;font-weight:700;font-variant-numeric:tabular-nums;flex-shrink:0}

/* Empty state */
.empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 0;color:#555}
.empty .icon{font-size:48px;margin-bottom:12px;opacity:.3}
.empty p{font-size:13px;font-weight:500}
.empty small{font-size:12px;margin-top:4px;color:#444}

/* View header */
.view-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.view-header h2{font-size:18px;font-weight:700}
.view-header small{font-size:12px;color:#666;margin-top:2px}
.refresh-btn{width:40px;height:40px;border-radius:12px;background:#111;border:1px solid rgba(255,255,255,.06);color:#666;font-size:16px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s;font-family:inherit}
.refresh-btn:active{color:#FF6B6B}

/* Loading */
.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 0;color:#555}
.spinner{width:32px;height:32px;border:3px solid #222;border-top-color:#FF6B6B;border-radius:50%;animation:spin .8s linear infinite;margin-bottom:12px}
@keyframes spin{to{transform:rotate(360deg)}}

/* Toast */
.toast{position:fixed;top:16px;left:16px;right:16px;z-index:100;max-width:480px;margin:0 auto;display:flex;align-items:center;gap:10px;padding:14px 16px;border-radius:16px;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);font-size:13px;font-weight:500;transition:all .3s;transform:translateY(-120%);opacity:0}
.toast.show{transform:translateY(0);opacity:1}
.toast.success{background:rgba(6,78,59,.85);border:1px solid rgba(34,197,94,.2);box-shadow:0 8px 32px rgba(34,197,94,.1)}
.toast.error{background:rgba(127,29,29,.85);border:1px solid rgba(239,68,68,.2);box-shadow:0 8px 32px rgba(239,68,68,.1)}
.toast .close{margin-left:auto;background:none;border:none;color:#999;cursor:pointer;font-size:16px;padding:4px}