/* SignalCTI app — dark product theme (brand tokens, dark values) */
:root {
  --surface: #0B1014;
  --raised: #141B21;
  --sunken: #070A0D;
  --line: #26313A;
  --line-strong: #3A4650;
  --ink: #F2F5EE;
  --muted: #A3AEA8;
  --signal: #C6F432;
  --on-signal: #0B1014;
  --signal-soft: #1F2B0B;
  --critical: #FF7A6E; --critical-soft: #3A1210;
  --high: #FDA45C;     --high-soft: #3A2208;
  --medium: #F5C84B;   --medium-soft: #352A08;
  --low: #84AEFF;      --low-soft: #10213F;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --r-sm: 4px; --r-md: 8px; --r-lg: 14px;
  --side: 248px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--surface); color: var(--ink); font: 400 15px/1.5 var(--font-sans); -webkit-font-smoothing: antialiased; }
a { color: var(--signal); }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--font-display); margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
.muted { color: var(--muted); }
.mono { font-family: var(--font-mono); }
.hidden { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* Buttons & inputs */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 38px; padding: 0 16px; border-radius: var(--r-md); border: 1px solid var(--line); background: var(--raised); color: var(--ink); font-weight: 600; font-size: 14px; cursor: pointer; text-decoration: none; white-space: nowrap; transition: border-color .15s, background .15s, opacity .15s; }
.btn:hover { border-color: var(--line-strong); }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--signal); color: var(--on-signal); border-color: var(--signal); }
.btn-primary:hover { border-color: var(--signal); filter: brightness(1.05); }
.btn-ghost { background: transparent; }
.btn-sm { height: 30px; padding: 0 12px; font-size: 13px; }
.btn svg { width: 16px; height: 16px; }
.input, .select { height: 40px; width: 100%; padding: 0 12px; border-radius: var(--r-md); border: 1px solid var(--line); background: var(--sunken); color: var(--ink); font: 400 15px var(--font-sans); }
.input:focus, .select:focus { outline: none; border-color: var(--signal); box-shadow: 0 0 0 3px rgba(198,244,50,.15); }
.input::placeholder { color: #6B7772; }
label.lbl { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; }
.field { margin-bottom: 14px; }
.row { display: flex; gap: 10px; align-items: center; }
.row > .grow { flex: 1; min-width: 0; }

/* Badges */
.sev { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 3px 8px; border-radius: var(--r-sm); white-space: nowrap; }
.sev::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.sev-critical { color: var(--critical); background: var(--critical-soft); }
.sev-high { color: var(--high); background: var(--high-soft); }
.sev-medium { color: var(--medium); background: var(--medium-soft); }
.sev-low { color: var(--low); background: var(--low-soft); }
.tag { font-size: 12px; font-weight: 500; padding: 3px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); white-space: nowrap; }
.tag-ok { color: var(--signal); border-color: #3B4F12; background: var(--signal-soft); }
.tag-wait { color: var(--medium); border-color: #4A3B0E; background: var(--medium-soft); }

/* Auth screen */
.auth { min-height: 100%; display: grid; place-items: center; padding: 32px 16px; background: radial-gradient(ellipse at 70% 0%, #17220A 0%, var(--surface) 55%); }
.auth-card { width: 100%; max-width: 420px; background: var(--raised); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 32px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 700 20px var(--font-display); letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.auth-card h1 { font-size: 26px; margin: 24px 0 6px; }
.auth-card .sub { color: var(--muted); margin-bottom: 24px; }
.tabs { display: flex; gap: 4px; padding: 4px; background: var(--sunken); border: 1px solid var(--line); border-radius: var(--r-md); margin-bottom: 20px; }
.tabs button { flex: 1; height: 34px; border: 0; border-radius: 6px; background: none; color: var(--muted); font-weight: 600; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--raised); color: var(--ink); }
.msg { font-size: 14px; padding: 10px 12px; border-radius: var(--r-md); margin-bottom: 14px; }
.msg-err { background: var(--critical-soft); color: var(--critical); }
.msg-ok { background: var(--signal-soft); color: var(--signal); }
.linkbtn { background: none; border: 0; color: var(--muted); font-size: 13px; cursor: pointer; padding: 0; text-decoration: underline; }
.linkbtn:hover { color: var(--ink); }

/* Shell */
.shell { display: grid; grid-template-columns: var(--side) 1fr; min-height: 100%; }
.side { position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; gap: 24px; padding: 20px 14px; border-right: 1px solid var(--line); background: var(--sunken); }
.side .brand { padding: 4px 8px; }
.nav { display: grid; gap: 2px; }
.nav a { display: flex; align-items: center; gap: 12px; height: 38px; padding: 0 10px; border-radius: var(--r-md); color: var(--muted); text-decoration: none; font-weight: 500; }
.nav a:hover { color: var(--ink); background: var(--raised); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--raised); }
.nav a[aria-current="page"] svg { color: var(--signal); }
.nav svg { width: 18px; height: 18px; flex: none; }
.nav .count { margin-left: auto; font: 600 12px var(--font-mono); color: var(--muted); }
.side-foot { margin-top: auto; border-top: 1px solid var(--line); padding: 14px 8px 0; display: grid; gap: 8px; font-size: 13px; }
.side-foot .who { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.main { min-width: 0; }
.topbar { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 16px; height: 64px; padding: 0 32px; border-bottom: 1px solid var(--line); background: rgba(11,16,20,.92); backdrop-filter: blur(8px); }
.topbar h1 { font-size: 20px; }
.topbar .spacer { flex: 1; }
.topbar .last { font-size: 13px; color: var(--muted); }
.mobile-nav { display: none; }
.content { padding: 28px 32px 64px; max-width: 1180px; }
.demo-banner { background: var(--signal-soft); color: var(--signal); font-size: 13px; padding: 8px 32px; border-bottom: 1px solid #3B4F12; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--raised); border: 1px solid var(--line); border-radius: var(--r-md); padding: 16px; display: grid; gap: 6px; }
.stat .n { font: 600 30px/1 var(--font-mono); }
.stat .sev { justify-self: start; }

/* Filters */
.filters { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 14px; }
.seg { display: inline-flex; padding: 3px; background: var(--sunken); border: 1px solid var(--line); border-radius: var(--r-md); }
.seg button { height: 30px; padding: 0 12px; border: 0; background: none; border-radius: 6px; color: var(--muted); font-weight: 500; font-size: 13px; cursor: pointer; }
.seg button[aria-pressed="true"] { background: var(--raised); color: var(--ink); }
.filters .select { width: auto; height: 36px; font-size: 14px; }
.filters .input { width: 260px; height: 36px; font-size: 14px; }

/* Alert list */
.alerts { display: grid; gap: 8px; }
.alert { background: var(--raised); border: 1px solid var(--line); border-radius: var(--r-md); }
.alert.open { border-color: var(--line-strong); }
.alert-head { width: 100%; display: grid; grid-template-columns: 96px 1fr auto; gap: 16px; align-items: center; padding: 14px 16px; background: none; border: 0; text-align: left; cursor: pointer; }
.alert-head .t { font-weight: 600; font-size: 15px; overflow-wrap: anywhere; }
.alert-head .m { font-size: 13px; color: var(--muted); margin-top: 2px; }
.alert-body { padding: 4px 16px 18px 128px; display: grid; gap: 16px; }
.ai { background: var(--sunken); border: 1px solid var(--line); border-left: 3px solid var(--signal); border-radius: var(--r-md); padding: 12px 14px; }
.ai .k { font-size: 12px; font-weight: 600; color: var(--signal); margin-bottom: 4px; }
.block .k { font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 4px; }
.facts { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px 20px; }
.facts div span { display: block; font-size: 12px; color: var(--muted); }
.facts div b { font-weight: 500; overflow-wrap: anywhere; }
.sources { display: flex; flex-wrap: wrap; gap: 8px; }
.sources a { font-size: 13px; text-decoration: none; border: 1px solid var(--line); padding: 4px 10px; border-radius: 999px; }
.sources a:hover { border-color: var(--line-strong); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Cards (profile, settings) */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.card { background: var(--raised); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 22px; }
.card h2 { font-size: 18px; }
.card .desc { color: var(--muted); font-size: 14px; margin: 4px 0 16px; }
.items { display: grid; gap: 8px; margin-top: 14px; }
.item { border: 1px solid var(--line); border-radius: var(--r-md); padding: 10px 12px; background: var(--sunken); }
.item .top { display: flex; align-items: center; gap: 10px; }
.item .val { flex: 1; min-width: 0; font-family: var(--font-mono); font-size: 14px; overflow-wrap: anywhere; }
.icon-btn { width: 30px; height: 30px; border-radius: 6px; border: 1px solid transparent; background: none; color: var(--muted); display: grid; place-items: center; cursor: pointer; flex: none; }
.icon-btn:hover { border-color: var(--line); color: var(--ink); }
.icon-btn svg { width: 16px; height: 16px; }
.verify { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--line); display: grid; gap: 8px; font-size: 13px; color: var(--muted); }
.kv { display: grid; grid-template-columns: 70px 1fr auto; gap: 8px; align-items: center; }
.kv code { font: 500 12px var(--font-mono); color: var(--ink); background: var(--surface); border: 1px solid var(--line); padding: 5px 8px; border-radius: var(--r-sm); overflow-wrap: anywhere; }
.note { font-size: 12px; color: var(--muted); margin-top: 6px; }
.soon { font-size: 12px; color: var(--muted); margin-top: 10px; }

/* Empty / onboarding */
.empty { background: var(--raised); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 32px; }
.empty h2 { font-size: 22px; }
.steps { display: grid; gap: 10px; margin-top: 18px; counter-reset: s; }
.steps a, .steps div { display: flex; gap: 12px; align-items: center; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--r-md); color: var(--ink); text-decoration: none; background: var(--sunken); }
.steps .num { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font: 600 13px var(--font-mono); background: var(--surface); border: 1px solid var(--line); flex: none; }
.steps .done .num { background: var(--signal); color: var(--on-signal); border-color: var(--signal); }

/* Toast */
.toasts { position: fixed; right: 20px; bottom: 20px; display: grid; gap: 8px; z-index: 50; }
.toast { background: var(--raised); border: 1px solid var(--line-strong); border-radius: var(--r-md); padding: 12px 16px; font-size: 14px; box-shadow: 0 10px 30px rgba(0,0,0,.4); max-width: 360px; }
.toast.ok { border-left: 3px solid var(--signal); }
.toast.err { border-left: 3px solid var(--critical); }
.spin { width: 14px; height: 14px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .side { display: none; }
  .mobile-nav { display: flex; gap: 4px; padding: 8px 16px; border-bottom: 1px solid var(--line); overflow-x: auto; }
  .mobile-nav a { padding: 8px 12px; border-radius: var(--r-md); color: var(--muted); text-decoration: none; font-weight: 500; white-space: nowrap; }
  .mobile-nav a[aria-current="page"] { background: var(--raised); color: var(--ink); }
  .topbar { padding: 0 16px; }
  .topbar .last { display: none; }
  .content { padding: 20px 16px 48px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid2 { grid-template-columns: 1fr; }
  .alert-head { grid-template-columns: 1fr; gap: 8px; }
  .alert-body { padding: 4px 16px 18px; }
  .filters .input { width: 100%; }
  .demo-banner { padding: 8px 16px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }