:root {
  --green: #3ecf8e; --mint: #00c573; --forest: #1f4b37; --emerald: #006239;
  --snow: #fafafa; --silver: #b4b4b4; --smoke: #898989; --graphite: #4d4d4d;
  --slate: #393939; --charcoal: #2e2e2e; --ash: #242424; --obsidian: #121212; --deep: #0d0d0d;
  --red: #f87171; --red-bg: rgba(248, 113, 113, .1); --amber: #fbbf24;
  --font: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: 'Source Code Pro', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--obsidian); color: var(--snow); font-family: var(--font); font-size: 14px; line-height: 1.43; letter-spacing: -0.007em; }
button, input, select, textarea { font: inherit; letter-spacing: inherit; color: inherit; }
a { color: var(--mint); text-decoration: none; }
a:hover { text-decoration: underline; }
.hidden { display: none !important; }
.mono { font-family: var(--mono); letter-spacing: .02em; }
td.mono { font-size: 13px; }
.muted { color: var(--smoke); }

/* ---------- Top bar ---------- */
.topbar { position: sticky; top: 0; z-index: 10; height: 64px; display: flex; align-items: center; gap: 16px; padding: 0 24px; background: var(--obsidian); border-bottom: 1px solid var(--charcoal); }
.brand { display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 500; }
.brand .mark { width: 22px; height: 22px; border-radius: 6px; background: var(--green); display: grid; place-items: center; color: var(--obsidian); font-weight: 500; font-size: 13px; }
.brand .sub { color: var(--silver); font-weight: 400; }
.topbar .spacer { flex: 1; }
.topbar a.link { color: var(--silver); font-size: 14px; }

/* ---------- Layout ---------- */
main { max-width: 1200px; margin: 0 auto; padding: 32px 24px 96px; }
h1 { font-size: 36px; line-height: 1.2; font-weight: 400; margin: 0 0 8px; letter-spacing: -0.252px; }
h1 em { font-style: normal; color: var(--green); }
.lead { color: var(--silver); font-size: 16px; margin: 0 0 32px; }
.card { background: var(--obsidian); border: 1px solid var(--charcoal); border-radius: 16px; padding: 24px; }
.card + .card { margin-top: 24px; }

/* ---------- Pills / buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 8px 16px; border-radius: 9999px; border: 1px solid var(--slate); background: transparent; color: var(--snow); font-size: 14px; font-weight: 400; cursor: pointer; white-space: nowrap; transition: border-color .15s, background .15s; }
.btn:hover { border-color: var(--graphite); background: rgba(255, 255, 255, .04); }
.btn.primary { background: var(--green); border-color: var(--green); color: var(--obsidian); font-weight: 500; }
.btn.primary:hover { background: var(--mint); border-color: var(--forest); }
.btn:disabled { opacity: .5; cursor: default; }
.btn svg { width: 16px; height: 16px; }

.tabs { display: inline-flex; gap: 4px; padding: 4px; background: var(--ash); border: 1px solid var(--charcoal); border-radius: 9999px; margin-bottom: 24px; }
.tab { padding: 6px 20px; border-radius: 9999px; border: 1px solid transparent; background: none; color: var(--silver); cursor: pointer; font-size: 14px; }
.tab.active { background: var(--green); color: var(--obsidian); font-weight: 500; }

/* ---------- Forms ---------- */
label.f { display: block; font-size: 12px; color: var(--smoke); margin-bottom: 6px; }
.input, textarea.input, select.input { width: 100%; background: var(--obsidian); border: 1px solid var(--slate); border-radius: 8px; padding: 8px 12px; color: var(--snow); outline: none; }
.input::placeholder { color: var(--smoke); }
.input:focus { border-color: var(--green); }
textarea.input { min-height: 140px; resize: vertical; font-family: var(--mono); font-size: 13px; }
select.input { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--smoke) 50%), linear-gradient(135deg, var(--smoke) 50%, transparent 50%); background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 32px; }
.row { display: flex; gap: 12px; align-items: flex-start; }
.row.center { align-items: center; }
.grow { flex: 1; min-width: 0; }
.help { font-size: 12px; color: var(--smoke); margin: 8px 0 16px; }
.check { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; color: var(--snow); margin-bottom: 16px; }
.check input { appearance: none; width: 18px; height: 18px; border: 1px solid var(--slate); border-radius: 4px; display: grid; place-items: center; margin: 0; cursor: pointer; }
.check input:checked { background: var(--green); border-color: var(--green); }
.check input:checked::after { content: ''; width: 9px; height: 5px; border: 2px solid var(--obsidian); border-top: 0; border-right: 0; transform: rotate(-45deg) translate(1px, -1px); }
.side { display: flex; flex-direction: column; align-items: center; gap: 12px; width: 200px; }
.side .btn { width: 100%; }

/* ---------- Results ---------- */
.res-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.res-head h2 { font-size: 18px; font-weight: 500; margin: 0; }
.stats { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.stat { background: var(--ash); border: 1px solid var(--charcoal); border-radius: 12px; padding: 12px 16px; min-width: 120px; }
.stat b { display: block; font-size: 24px; font-weight: 400; line-height: 1.33; }
.stat span { font-size: 12px; color: var(--smoke); }
.stat.g b { color: var(--green); } .stat.r b { color: var(--red); }
.table-wrap { overflow-x: auto; border: 1px solid var(--charcoal); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; font-weight: 500; color: var(--silver); padding: 12px 12px; border-bottom: 1px solid var(--charcoal); white-space: nowrap; font-size: 13px; }
td { padding: 10px 12px; border-bottom: 1px solid var(--charcoal); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.w { white-space: normal; min-width: 180px; }
tbody tr:hover td { background: rgba(255, 255, 255, .02); }
tr.nf td { color: var(--smoke); }
th .input { margin-top: 6px; padding: 5px 10px; font-size: 12px; font-weight: 400; min-width: 110px; }
.actions { display: flex; gap: 4px; }
.icon-btn { width: 32px; height: 32px; border-radius: 9999px; border: 1px solid transparent; background: none; color: var(--snow); display: grid; place-items: center; cursor: pointer; }
.icon-btn:hover { background: var(--ash); border-color: var(--charcoal); }
.icon-btn svg { width: 17px; height: 17px; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 2px 10px; border-radius: 9999px; font-size: 12px; font-weight: 500; border: 1px solid var(--charcoal); color: var(--silver); }
.pill::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.pill.pass { color: var(--green); border-color: var(--forest); }
.pill.fail { color: var(--red); border-color: rgba(248, 113, 113, .35); }
.pill.none { color: var(--smoke); }
.empty { text-align: center; color: var(--smoke); padding: 40px 16px; }
.notice { font-size: 13px; color: var(--silver); background: var(--ash); border: 1px solid var(--charcoal); border-radius: 8px; padding: 8px 12px; margin-bottom: 16px; }

/* ---------- Modal ---------- */
.overlay { position: fixed; inset: 0; z-index: 50; background: rgba(0, 0, 0, .7); display: flex; align-items: flex-start; justify-content: center; padding: 48px 16px; overflow-y: auto; }
.modal { width: 100%; max-width: 460px; background: var(--obsidian); border: 1px solid var(--charcoal); border-radius: 16px; padding: 24px; }
.modal.wide { max-width: 760px; }
.modal.report { max-width: 880px; padding: 32px; }
.modal h3 { font-size: 18px; font-weight: 500; margin: 0 0 4px; }
.modal .sub { color: var(--smoke); margin: 0 0 20px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 8px; margin-top: 24px; flex-wrap: wrap; }
.msg { font-size: 13px; margin-top: 12px; min-height: 18px; }
.msg.ok { color: var(--green); } .msg.err { color: var(--red); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }
.grid2 .full { grid-column: 1 / -1; }
.section-label { grid-column: 1 / -1; font-size: 12px; color: var(--green); text-transform: uppercase; letter-spacing: .08em; margin-top: 8px; }

/* ---------- Report (Device History Report) ---------- */
.rep-top { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; }
.rep-top .t { font-size: 24px; line-height: 1.33; flex: 1; }
.rep-top .x { margin-left: 4px; }
.rep-label { color: var(--silver); font-size: 16px; margin: 0 0 8px; }
.rep-model { font-size: 36px; line-height: 1.2; font-weight: 500; margin: 0 0 16px; }
.rep-info { font-size: 16px; line-height: 1.6; color: var(--snow); margin-bottom: 24px; }
.rep-info span { color: var(--silver); }
.chk { display: flex; align-items: center; gap: 16px; padding: 16px 8px; border-top: 1px solid var(--charcoal); font-size: 18px; }
.chk:last-child { border-bottom: 1px solid var(--charcoal); }
.chk.na { color: var(--smoke); }
.ico { width: 28px; height: 28px; flex: none; border-radius: 50%; display: grid; place-items: center; }
.ico svg { width: 15px; height: 15px; }
.ico.pass { background: var(--green); color: var(--obsidian); }
.ico.fail { background: var(--red); color: var(--obsidian); }
.ico.warn { background: var(--amber); color: var(--obsidian); }
.ico.na { border: 2px dashed var(--graphite); }
.ico.sm { width: 20px; height: 20px; } .ico.sm svg { width: 11px; height: 11px; }
.rep-h { display: flex; align-items: center; gap: 12px; font-size: 24px; margin: 48px 0 16px; }
.kv { width: 100%; border-collapse: collapse; }
.kv td { padding: 12px 16px; font-size: 16px; border: 0; }
.kv tr:nth-child(odd) td { background: var(--ash); }
.kv td:last-child { text-align: right; }
.banner { background: var(--ash); border: 1px solid var(--charcoal); border-radius: 12px; padding: 14px 16px; display: flex; align-items: center; gap: 10px; font-weight: 500; margin-bottom: 24px; }
.banner.pass { color: var(--green); } .banner.fail { color: var(--red); }
.diag { display: grid; grid-template-columns: 1fr 1fr; gap: 0 32px; }
.diag > div:first-child { border-right: 1px solid var(--charcoal); padding-right: 32px; }
.grp { margin-bottom: 24px; }
.grp-h { display: flex; align-items: center; gap: 10px; font-weight: 500; padding-bottom: 10px; border-bottom: 1px solid var(--charcoal); margin-bottom: 10px; font-size: 16px; }
.grp-h .n { margin-left: auto; color: var(--green); }
.grp-h .n.f { color: var(--red); }
.it { display: flex; align-items: center; gap: 10px; padding: 7px 0; font-size: 15px; color: var(--silver); }
.it .v { margin-left: auto; font-size: 13px; color: var(--smoke); }
.hist td { font-size: 13px; }

/* ---------- Login ---------- */
.login { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login .card { width: 100%; max-width: 380px; }
.login h2 { font-size: 24px; font-weight: 400; margin: 16px 0 4px; }

/* ---------- Toast ---------- */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 99; background: var(--ash); border: 1px solid var(--charcoal); border-radius: 9999px; padding: 10px 20px; font-size: 14px; }
.toast.ok { border-color: var(--forest); color: var(--green); }
.toast.err { border-color: rgba(248, 113, 113, .4); color: var(--red); }

@media (max-width: 760px) {
  main { padding: 24px 16px 64px; }
  .row.stack { flex-direction: column; }
  .side { width: 100%; }
  .grid2, .diag { grid-template-columns: 1fr; }
  .diag > div:first-child { border-right: 0; padding-right: 0; }
  h1 { font-size: 28px; }
  .rep-model { font-size: 26px; }
  .topbar .sub { display: none; }
}