:root{--bg:#f4f7f6;--card:#fff;--ink:#17211f;--muted:#6b7976;--line:#dce5e2;--main:#0f766e;--main2:#14a394;--danger:#c23c42;--shadow:0 8px 30px #173b3520}*{box-sizing:border-box}body{margin:0;font-family:Tahoma,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}button,input,select,textarea{font:inherit}button{cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:10px;padding:.7rem 1rem}.primary{background:var(--main);color:#fff;border-color:var(--main)}.hidden{display:none!important}.app{display:grid;grid-template-columns:250px 1fr;min-height:100vh}aside{background:#102c29;color:#dbe9e6;padding:20px 14px;position:sticky;top:0;height:100vh}.brand{display:flex;gap:10px;align-items:center;padding:6px 8px 25px}.brand small,.brand strong{display:block}.brand small{color:#96b6b0}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:linear-gradient(135deg,var(--main2),var(--main));color:white;font-weight:bold}.nav-item{width:100%;display:flex;gap:12px;align-items:center;border:0;background:transparent;color:#bcd0cc;margin:3px 0;text-align:right}.nav-item:hover,.nav-item.active{background:#1c4742;color:white}.nav-item.danger{position:absolute;bottom:18px;width:calc(100% - 28px);color:#ffb6b8}main{min-width:0}header{height:78px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 28px;position:sticky;top:0;z-index:4}header h1{font-size:1.25rem;margin:0}header small{color:var(--muted)}#menuBtn{display:none}.icon-btn{margin-inline-start:auto;padding:.55rem .75rem}#content{padding:26px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:22px}.stat,.panel{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.stat{padding:20px}.stat small{color:var(--muted)}.stat strong{display:block;font-size:1.55rem;margin-top:9px}.panel{padding:18px;margin-bottom:18px}.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:15px}.toolbar input{flex:1}.toolbar h2{margin:0;margin-inline-end:auto;font-size:1.05rem}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:.75rem;background:#fff;color:var(--ink)}label{display:grid;gap:7px;color:#41504d;font-size:.9rem}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;white-space:nowrap}th,td{text-align:right;padding:12px;border-bottom:1px solid var(--line)}th{color:var(--muted);font-size:.84rem;background:#f8faf9}.actions button{padding:.4rem .6rem;margin:0 2px}.empty{text-align:center;color:var(--muted);padding:45px}.login-screen{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top right,#c7f1e9,transparent 40%),#eef5f3}.login-card{width:min(400px,calc(100% - 30px));padding:32px;background:white;border-radius:20px;box-shadow:var(--shadow);display:grid;gap:15px;text-align:center}.login-card .brand-mark{margin:auto}.login-card h1{margin:0}.login-card p,.login-card small{margin:0;color:var(--muted)}dialog{border:0;border-radius:18px;width:min(650px,calc(100% - 24px));padding:0;box-shadow:0 20px 70px #0005}dialog::backdrop{background:#102c2988}.dialog-head,.dialog-actions{display:flex;align-items:center;gap:10px;padding:18px 22px;border-bottom:1px solid var(--line)}.dialog-head h2{margin:0}.dialog-actions{justify-content:flex-end;border:0;border-top:1px solid var(--line)}.form-grid,#settingsForm>label,#settingsForm>.hint{margin:18px 22px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.hint{color:var(--muted);line-height:1.7}.invoice-layout{display:grid;grid-template-columns:1fr 1.15fr;gap:18px}.products{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;max-height:58vh;overflow:auto}.product{padding:13px;border:1px solid var(--line);border-radius:12px;background:#fff}.product strong,.product small{display:block}.product small{color:var(--muted);margin:5px 0}.total{font-size:1.3rem;display:flex;justify-content:space-between;padding:16px 0}#toast{position:fixed;bottom:20px;left:20px;background:#162c29;color:white;padding:12px 18px;border-radius:10px;opacity:0;pointer-events:none;transition:.2s;z-index:20}#toast.show{opacity:1}@media(max-width:900px){.app{grid-template-columns:1fr}aside{position:fixed;right:-270px;z-index:10;width:250px;transition:.2s}aside.open{right:0}#menuBtn{display:block}.stats{grid-template-columns:1fr 1fr}.invoice-layout{grid-template-columns:1fr}#content{padding:16px}header{padding:0 16px}}@media(max-width:520px){.stats{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.toolbar{flex-wrap:wrap}.toolbar input{flex-basis:100%}.products{grid-template-columns:1fr}th,td{padding:10px 8px}}