:root {
  --black: #0a0b0d;
  --panel: #14161a;
  --panel-2: #1b1e24;
  --line: #2a2e37;
  --gray: #8b93a1;
  --text: #e8eaee;
  --red: #e63946;
  --red-2: #ff5a66;
  --red-dark: #8f1620;
  --ok: #2fbf71;
  --warn: #f4a62a;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .45);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 80% -10%, #1c0d10 0%, var(--black) 55%);
  color: var(--text);
  font-family: "Segoe UI", Inter, Roboto, system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}
.hidden { display: none !important; }
h1, h2, h3, h4 { margin: 0 0 .4rem; font-weight: 650; letter-spacing: .2px; }
label { display: block; font-size: .8rem; color: var(--gray); margin: .6rem 0 .25rem; text-transform: uppercase; letter-spacing: .6px; }
input, select, textarea {
  width: 100%; padding: .62rem .7rem; background: #0e1013; color: var(--text);
  border: 1px solid var(--line); border-radius: 9px; font-size: .95rem; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(230,57,70,.15); }
textarea { resize: vertical; }

/* Buttons */
.btn {
  border: 1px solid var(--line); background: var(--panel-2); color: var(--text);
  padding: .6rem 1rem; border-radius: 9px; cursor: pointer; font-size: .9rem; font-weight: 600;
  transition: .15s; white-space: nowrap;
}
.btn:hover { border-color: var(--gray); }
.btn-primary { background: var(--red); border-color: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-2); border-color: var(--red-2); }
.btn-accent { background: transparent; border-color: var(--red); color: var(--red-2); }
.btn-accent:hover { background: rgba(230,57,70,.12); }
.btn-danger { background: transparent; border-color: var(--red-dark); color: var(--red-2); }
.btn-danger:hover { background: rgba(143,22,32,.25); }
.btn-ghost { background: transparent; }
.icon-btn { background: transparent; border: 0; color: var(--gray); font-size: 1.5rem; cursor: pointer; line-height: 1; }
.icon-btn:hover { color: var(--text); }

/* Brand */
.brand-mark {
  display: inline-grid; place-items: center; background: var(--red); color: #fff; font-weight: 800;
  border-radius: 10px; padding: .35rem .55rem; letter-spacing: 1px;
}
.brand-mark.small { font-size: .8rem; padding: .3rem .5rem; }
.brand-name { font-weight: 700; font-size: 1.05rem; letter-spacing: .5px; }

/* Login */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.login-card {
  width: 360px; background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line); border-radius: 16px; padding: 2rem 1.6rem; box-shadow: var(--shadow);
  display: flex; flex-direction: column; position: relative;
}
.login-card .brand-mark { align-self: center; margin-bottom: .8rem; font-size: 1.4rem; padding: .6rem 1rem; }
.login-card h1 { text-align: center; font-size: 1.25rem; }
.login-card .btn-primary { margin-top: 1.2rem; }
.pass-wrap { position: relative; }
.pass-wrap input { padding-right: 2.5rem; }
.pass-toggle { position: absolute; top: 50%; right: .5rem; transform: translateY(-50%); background: transparent; border: 0; color: var(--gray); cursor: pointer; padding: .25rem; display: grid; place-items: center; }
.pass-toggle:hover { color: var(--text); }
.lang-mini { position: absolute; top: 12px; right: 12px; padding: .3rem .6rem; font-size: .75rem; }
.error { color: var(--red-2); font-size: .85rem; margin-top: .6rem; text-align: center; }
.company-options { display: flex; flex-direction: column; gap: .5rem; margin-top: 1rem; }
.company-options .btn { width: 100%; text-align: left; }
.company-switch { width: auto; max-width: 190px; padding: .35rem .5rem; font-size: .82rem; }

/* Topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .7rem 1.2rem; border-bottom: 1px solid var(--line);
  background: rgba(10,11,13,.85); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: .6rem; }
.topbar-right { display: flex; align-items: center; gap: .6rem; }
.chip { color: var(--gray); font-size: .85rem; border: 1px solid var(--line); padding: .25rem .6rem; border-radius: 999px; }

/* Panels */
.panel { max-width: 1280px; margin: 0 auto; padding: 1.2rem; }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }

/* Search */
.searchbar { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.search-input { flex: 1; min-width: 240px; font-size: 1rem; }
.ai-toggle { display: flex; align-items: center; gap: .35rem; text-transform: none; letter-spacing: 0; color: var(--gray); font-size: .8rem; margin: 0; }
.ai-toggle input { width: auto; }
.result-info { color: var(--gray); font-size: .82rem; margin: .8rem 0; min-height: 1em; }
.machine-filter { width: auto; min-width: 150px; max-width: 230px; }
.scroll-sentinel { height: 1px; }

/* Parts grid */
.parts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 1rem; }
.card {
  background: linear-gradient(180deg, var(--panel-2), var(--panel)); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; cursor: pointer; transition: .15s; display: flex; flex-direction: column;
}
.card:hover { border-color: var(--red); transform: translateY(-2px); box-shadow: var(--shadow); }
.thumb { aspect-ratio: 4/3; background: #0b0c0f; display: grid; place-items: center; overflow: hidden; }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb .noimg { color: var(--line); font-size: 2.4rem; font-weight: 800; }
.card-body { padding: .7rem .8rem .9rem; display: flex; flex-direction: column; gap: .25rem; }
.card .maquina { color: var(--red-2); font-size: .7rem; text-transform: uppercase; letter-spacing: .6px; font-weight: 700; }
.card .code { font-family: ui-monospace, Menlo, monospace; color: var(--gray); font-size: .78rem; font-weight: 600; }
.card .name { font-weight: 600; font-size: .95rem; line-height: 1.2; }
.card .loc { color: var(--gray); font-size: .78rem; }
.qty-row { display: flex; align-items: center; justify-content: space-between; margin-top: .4rem; }
.qty { font-weight: 700; }
.qty.low { color: var(--red-2); }
.badge { font-size: .68rem; padding: .15rem .45rem; border-radius: 999px; border: 1px solid var(--line); color: var(--gray); }
.badge.low { background: var(--red); border-color: var(--red); color: #fff; }

/* Clients */
.clients-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem; }
.client-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; }
.client-card h3 { font-size: 1.05rem; }
.client-card .meta { color: var(--gray); font-size: .82rem; margin: .3rem 0; line-height: 1.5; }
.client-card .stats { display: flex; gap: 1rem; margin: .6rem 0; }
.stat { font-size: .8rem; color: var(--gray); }
.stat b { display: block; font-size: 1.2rem; color: var(--text); }
.stat.low b { color: var(--red-2); }
.client-actions { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .6rem; }
.client-actions .btn { padding: .4rem .65rem; font-size: .78rem; }
.inactive { opacity: .5; }

/* Modals */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.65); z-index: 40; backdrop-filter: blur(2px); }
.modal {
  position: fixed; z-index: 50; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: min(520px, 94vw); max-height: 92vh; overflow: auto;
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow);
}
.modal.wide { width: min(860px, 95vw); }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.2rem; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--panel); }
.modal-body { padding: 1.1rem 1.2rem 1.3rem; }
.modal-actions { display: flex; gap: .6rem; justify-content: flex-end; margin-top: 1.2rem; flex-wrap: wrap; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 .9rem; }
.row-check { display: flex; align-items: center; gap: .5rem; text-transform: none; letter-spacing: 0; color: var(--text); font-size: .9rem; margin-top: .8rem; }
.row-check input { width: auto; }
.hint { color: var(--gray); font-size: .8rem; margin-top: .5rem; }

.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.detail-img { background: #0b0c0f; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; display: grid; place-items: center; min-height: 220px; }
.detail-img img { width: 100%; height: auto; max-height: 60vh; object-fit: contain; display: block; }
.detail-info p { margin: .4rem 0; font-size: .92rem; }
.detail-info b { color: var(--gray); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .5px; display: block; }
.stock-box { margin-top: 1.2rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.stock-row { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.stock-row input { width: 90px; }
.stock-row #stockMotivo { flex: 1; min-width: 140px; }

/* Users + audit */
.users-list { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1rem; }
.user-row { display: flex; align-items: center; gap: .5rem; padding: .5rem .6rem; border: 1px solid var(--line); border-radius: 9px; background: var(--panel-2); flex-wrap: wrap; }
.user-row .uname { font-weight: 600; }
.user-row .role { font-size: .72rem; color: var(--gray); border: 1px solid var(--line); border-radius: 999px; padding: .1rem .5rem; }
.user-row .grow { flex: 1; }
.user-row.off { opacity: .5; }
.user-row select { width: auto; padding: .3rem .4rem; font-size: .78rem; }
.user-form { border-top: 1px solid var(--line); padding-top: 1rem; }
.client-users-row { display: flex; gap: .4rem; margin-bottom: .4rem; flex-wrap: wrap; align-items: center; }
.client-users-row input, .client-users-row select { flex: 1; min-width: 120px; width: auto; }
.audit-list { margin-top: .8rem; display: flex; flex-direction: column; max-height: 60vh; overflow: auto; }
.audit-row { display: grid; grid-template-columns: 160px 130px 1fr; gap: .6rem; padding: .45rem .2rem; border-bottom: 1px solid var(--line); font-size: .85rem; }
.audit-row .a-date { color: var(--gray); font-size: .78rem; }
.audit-row .a-user { color: var(--red-2); font-weight: 600; }
.audit-row .a-code { font-family: ui-monospace, Menlo, monospace; font-size: .78rem; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--panel-2); border: 1px solid var(--line); border-left: 4px solid var(--red);
  padding: .8rem 1.1rem; border-radius: 10px; box-shadow: var(--shadow); z-index: 80; font-size: .9rem;
}
.toast.ok { border-left-color: var(--ok); }
.toast.err { border-left-color: var(--red); }

@media (max-width: 620px) {
  .grid2 { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .brand-name { display: none; }
  .audit-row { grid-template-columns: 1fr 1fr; }
  .audit-row .a-detail { grid-column: 1 / -1; }
}