/* Net Watcher website — same palette as the desktop app. */
:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --border: #dde2e7;
  --text: #1f2933;
  --muted: #5f6b78;
  --accent: #1f6feb;
  --accent-dark: #1858c4;
  --ok: #1f9d55;
  --bad: #d64545;
  --bad-row: #fdecec;
  --warn: #c76e00;
  --free: #eef1f4;
  --reserved: #d7e6fb;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .08);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font: 16px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  color: var(--text);
  background: #fff;
}
img { display: inline-block; vertical-align: middle; }
a { color: var(--accent); }
code { font-family: Consolas, ui-monospace, monospace; font-size: .92em; background: var(--free); padding: 1px 5px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 760px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 8px; border: 1px solid transparent;
  font-weight: 600; text-decoration: none; cursor: pointer; transition: background .15s, box-shadow .15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-secondary { background: #fff; color: var(--accent); border-color: var(--accent); }
.btn-secondary:hover { background: #f0f6ff; }
.btn-ghost { color: var(--text); border-color: var(--border); background: #fff; }
.btn-ghost:hover { border-color: #b8c1cb; }
.btn-large { padding: 14px 24px; font-size: 1.05rem; }
.btn-small { padding: 6px 14px; font-size: .9rem; }
.btn[aria-disabled="true"] { opacity: .5; pointer-events: none; }
.btn:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid #9cc2ff; outline-offset: 2px; }

/* ---------- Nav ---------- */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; }
.nav nav { display: flex; align-items: center; gap: 22px; }
.nav nav a:not(.btn) { color: var(--muted); text-decoration: none; font-weight: 500; }
.nav nav a:not(.btn):hover, .nav nav a.active { color: var(--text); }
.nav nav .btn { color: #fff; background: var(--accent); }

/* ---------- Hero ---------- */
.hero { background: linear-gradient(180deg, #f0f6ff 0%, #fff 100%); padding: 72px 0 64px; }
.hero-inner { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.eyebrow { color: var(--accent); font-weight: 600; margin: 0 0 12px; letter-spacing: .02em; }
h1 { font-size: clamp(2.2rem, 4.6vw, 3.3rem); letter-spacing: -.02em; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 14px; }
.meta { color: var(--muted); font-size: .92rem; margin: 0; }

.mini-window { background: var(--card); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); padding: 14px; position: relative; }
.mini-bar { display: flex; gap: 6px; margin-bottom: 12px; }
.mini-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.mini-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 10px; }
.mini-stats div { border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }
.mini-stats b { display: block; font-size: 1.4rem; }
.mini-stats small { color: var(--muted); }
.mini-row { display: grid; grid-template-columns: 14px 110px 1fr 20px; align-items: center; gap: 8px; padding: 7px 8px; border-bottom: 1px solid var(--free); font-size: .9rem; font-variant-numeric: tabular-nums; }
.mini-row em { font-style: normal; font-weight: 600; }
.bad-row { background: var(--bad-row); }
.mini-toast { position: absolute; right: -18px; bottom: -22px; display: flex; gap: 10px; align-items: flex-start; background: #fff; border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow); padding: 10px 14px; font-size: .85rem; max-width: 270px; animation: toast 6s ease-in-out infinite; }
.mini-toast b, .mini-toast span { display: block; }
.mini-toast span { color: var(--muted); }
@keyframes toast { 0%, 8% { opacity: 0; transform: translateY(8px); } 14%, 80% { opacity: 1; transform: none; } 90%, 100% { opacity: 0; transform: translateY(8px); } }
@media (prefers-reduced-motion: reduce) { .mini-toast { animation: none; } html { scroll-behavior: auto; } }

.ok { color: var(--ok); }
.bad { color: var(--bad); }
.warn { color: var(--warn); }
.tick { color: var(--ok); font-weight: 700; }
.cross { color: var(--bad); font-weight: 700; }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: #a0aab4; }
.dot.on { background: var(--ok); }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg); }
.section-lead { color: var(--muted); font-size: 1.1rem; max-width: 46em; margin: 0 0 36px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.feature p { color: var(--muted); margin: 0; }
.ficon { width: 44px; height: 44px; border-radius: 10px; background: #e8f0fe; color: var(--accent); display: grid; place-items: center; font-size: 1.3rem; margin-bottom: 14px; }

/* ---------- App replica ---------- */
.app { background: var(--bg); border: 1px solid #c9d1da; border-radius: 10px; box-shadow: var(--shadow); overflow: hidden; font-size: 13px; }
.app-titlebar { background: #fff; border-bottom: 1px solid var(--border); padding: 8px 12px; font-size: 12px; display: flex; align-items: center; gap: 8px; }
.app-body { padding: 14px; }
.app-header { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.app-title { font-size: 20px; font-weight: 600; }
.app-sub { color: var(--muted); }
.app-actions { display: flex; gap: 6px; }
.fake-btn { border: 1px solid #adadad; background: #e1e1e1; padding: 4px 12px; }
.fake-btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.app-stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-bottom: 10px; }
.stat { background: #fff; border: 1px solid var(--border); border-radius: 6px; padding: 8px 12px; }
.stat b { display: block; font-size: 20px; font-weight: 600; font-variant-numeric: tabular-nums; }
.stat small { color: var(--muted); font-size: 12px; }

.tabs { display: flex; gap: 2px; }
.tabs button { font: inherit; border: 1px solid var(--border); border-bottom: none; background: #e9edf1; padding: 5px 12px; cursor: pointer; border-radius: 4px 4px 0 0; color: var(--text); }
.tabs button[aria-selected="true"] { background: #fff; font-weight: 600; }
.tabpanel { background: #fff; border: 1px solid var(--border); padding: 10px; min-height: 330px; }

.table-scroll { overflow-x: auto; }
.grid { width: 100%; border-collapse: collapse; white-space: nowrap; }
.grid th { text-align: left; font-weight: 400; color: var(--text); background: #fafbfc; border-bottom: 1px solid var(--border); padding: 5px 8px; }
.grid td { padding: 5px 8px; border-bottom: 1px solid var(--free); font-variant-numeric: tabular-nums; }
.grid tr.unknown td { background: var(--bad-row); }
.grid tr.offline td { color: #8a95a1; }
.grid td.name { font-weight: 600; }
.grid td.mac { font-family: Consolas, ui-monospace, monospace; font-size: 12px; }
.grid td.star { color: var(--accent); }
.grid.small { margin-top: 10px; }

.legend { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 10px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.sw { width: 14px; height: 14px; border-radius: 3px; border: 1px solid var(--border); display: inline-block; }
.sw.free, .tile.free { background: var(--free); }
.sw.known, .tile.known { background: #2e9e5b; }
.sw.unknown, .tile.unknown { background: var(--bad); }
.sw.reserved, .tile.reserved { background: var(--reserved); }
.sw.infra, .tile.infra { background: var(--accent); }
.ipmap { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 4px; }
.tile { height: 28px; border-radius: 4px; border: 1px solid var(--border); display: grid; place-items: center; font-size: 11px; color: #6b7785; cursor: default; }
.tile.known, .tile.unknown, .tile.infra { color: #fff; border-color: transparent; }
.tile:hover { outline: 2px solid var(--text); outline-offset: 1px; }
.ip-tip { margin-top: 10px; color: var(--muted); min-height: 1.6em; }

.health-tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 12px; }
.health-tiles .stat b { font-size: 16px; }
.chart-head { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-bottom: 6px; }
.key { display: inline-flex; align-items: center; gap: 6px; }
.key i { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.key i.outage-key { width: 12px; height: 10px; border-radius: 2px; background: rgba(208, 59, 59, .18); }
.chart { position: relative; border: 1px solid var(--border); border-radius: 4px; }
.chart svg { display: block; width: 100%; height: auto; }
.chart-tip { position: absolute; pointer-events: none; background: #fff; border: 1px solid var(--border); border-radius: 6px; padding: 6px 10px; box-shadow: var(--shadow); font-size: 12px; white-space: nowrap; }
.chart-tip i { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }

/* ---------- How it works ---------- */
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0 0 28px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.steps li { counter-increment: s; background: var(--bg); border-radius: var(--radius); padding: 20px 20px 20px 64px; position: relative; color: var(--muted); }
.steps li b { color: var(--text); }
.steps li::before { content: counter(s); position: absolute; left: 20px; top: 18px; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 700; display: grid; place-items: center; }
.note { border-left: 4px solid var(--accent); background: #f0f6ff; padding: 14px 18px; border-radius: 0 8px 8px 0; color: var(--muted); }
.note b { color: var(--text); }

/* ---------- Download ---------- */
.downloads { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.dl-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; position: relative; }
.dl-card.recommended { border: 2px solid var(--accent); }
.dl-card p { color: var(--muted); }
.badge { position: absolute; top: -12px; left: 24px; background: var(--accent); color: #fff; font-size: .78rem; font-weight: 700; padding: 3px 10px; border-radius: 99px; }
.dl-meta { display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; margin: 18px 0 0; font-size: .85rem; color: var(--muted); }
.dl-meta dt { color: var(--text); }
.dl-meta dd { margin: 0; min-width: 0; }
.hash { display: flex; gap: 6px; align-items: center; }
.hash code { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.copy { font: inherit; font-size: .8rem; border: 1px solid var(--border); background: #fff; border-radius: 5px; padding: 1px 8px; cursor: pointer; flex: none; }
.dl-missing { color: var(--bad); }
.smartscreen { margin-top: 24px; background: #fff8e6; border: 1px solid #f2d78c; border-radius: 8px; padding: 14px 18px; color: #5c4a14; }
.req-title { margin-top: 32px; }
.reqs { color: var(--muted); margin: 0; padding-left: 20px; }

/* ---------- FAQ ---------- */
details { border-bottom: 1px solid var(--border); padding: 16px 0; }
summary { cursor: pointer; font-weight: 600; font-size: 1.05rem; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { color: var(--muted); margin: 10px 0 0; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); font-size: .92rem; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; }
.footer a { color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .mini-toast { right: 8px; }
  .features { grid-template-columns: 1fr 1fr; }
  .app-stats { grid-template-columns: repeat(3, 1fr); }
  .health-tiles { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav nav a:not(.btn) { display: none; }
  .features, .downloads, .steps { grid-template-columns: 1fr; }
  .app-actions { display: none; }
  .section { padding: 56px 0; }
}