:root {
  --bg: #0f1420;
  --panel: #171e2e;
  --panel2: #1e2740;
  --text: #e6ebf5;
  --muted: #93a0b8;
  --accent: #5b8cff;
  --ok: #3ecf8e;
  --warn: #f5b83d;
  --err: #ff6b6b;
  --border: #2a3552;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

header { padding: 2rem 1.5rem 1rem; max-width: 1000px; margin: 0 auto; }
.header-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }

/* Language switcher */
#lang-switcher { position: relative; flex-shrink: 0; }
.lang-btn {
  display: flex; align-items: center; gap: .5rem;
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 999px; padding: .35rem .8rem; cursor: pointer; font-size: .85rem;
}
.lang-btn:hover { border-color: var(--accent); }
.lang-btn .caret { color: var(--muted); font-size: .7rem; }
.flag { display: inline-flex; width: 22px; height: 14px; border-radius: 2px; overflow: hidden; }
.flag svg { width: 100%; height: 100%; display: block; }
.lang-menu {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 50;
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: .3rem; min-width: 150px; box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.lang-menu.hidden { display: none; }
.lang-menu button {
  display: flex; align-items: center; gap: .6rem; width: 100%;
  background: none; border: none; color: var(--text); cursor: pointer;
  padding: .45rem .6rem; border-radius: 6px; font-size: .9rem; text-align: left;
}
.lang-menu button:hover { background: var(--panel2); }
.lang-menu button.current { background: var(--panel2); outline: 1px solid var(--accent); }
h1 { margin: 0 0 .3rem; font-size: 1.6rem; }
.subtitle { color: var(--muted); margin: 0 0 .8rem; }
h2 { margin: 2rem 0 .6rem; font-size: 1.2rem; border-bottom: 1px solid var(--border); padding-bottom: .3rem; }
h3 { margin: 1.4rem 0 .5rem; font-size: 1rem; }
a { color: var(--accent); }

.badge {
  display: inline-block; padding: .25rem .7rem; border-radius: 999px;
  font-size: .85rem; background: var(--panel2); border: 1px solid var(--border);
}
.badge.ok { border-color: var(--ok); color: var(--ok); }
.badge.warn { border-color: var(--warn); color: var(--warn); }

nav#tabs {
  display: flex; flex-wrap: wrap; gap: .4rem;
  max-width: 1000px; margin: 0 auto; padding: 0 1.5rem;
  border-bottom: 1px solid var(--border);
}
nav#tabs button {
  background: none; border: none; color: var(--muted); cursor: pointer;
  padding: .6rem .9rem; font-size: .95rem; border-bottom: 2px solid transparent;
}
nav#tabs button.active { color: var(--text); border-bottom-color: var(--accent); }
nav#tabs button:hover { color: var(--text); }

section.tab { display: none; max-width: 1000px; margin: 0 auto; padding: .5rem 1.5rem 3rem; }
section.tab.active { display: block; }

.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem; margin: .8rem 0; overflow-x: auto;
}
.card.code, pre.code {
  font-family: ui-monospace, 'Cascadia Code', Menlo, monospace;
  font-size: .85rem; white-space: pre-wrap; word-break: break-word;
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem;
}
pre.mermaid { background: transparent; display: flex; justify-content: center; }

table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: .45rem .6rem; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
code { background: var(--panel2); padding: .1rem .35rem; border-radius: 4px; font-size: .88em; }
pre code { background: none; padding: 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: .8rem; margin-top: .8rem; }
.stat {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: .9rem 1rem;
}
.stat .label { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.stat .value { font-size: 1.05rem; margin-top: .25rem; font-weight: 600; }
.stat.ok { border-color: var(--ok); }
.stat.warn { border-color: var(--warn); }
.stat.err { border-color: var(--err); }

.btn {
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: .5rem .9rem; cursor: pointer; font-size: .9rem;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.danger { color: var(--err); }

.row { display: flex; gap: .6rem; align-items: center; }
.row input[type="text"] {
  flex: 1; background: var(--panel2); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: .55rem .8rem; font-size: .95rem;
}

ul.items { list-style: none; margin: 0; padding: 0; }
ul.items li {
  display: flex; justify-content: space-between; align-items: center; gap: .8rem;
  padding: .5rem .2rem; border-bottom: 1px solid var(--border);
}
ul.items li:last-child { border-bottom: none; }
ul.items .meta { color: var(--muted); font-size: .78rem; }

ol.steps > li { margin-bottom: 1.2rem; }
ul.decisions li { margin-bottom: .5rem; }
.hint { color: var(--muted); font-size: .85rem; }

footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 2rem 1rem; border-top: 1px solid var(--border); }
.footer-brand { color: var(--text); font-size: .95rem; margin: .6rem 0 .2rem; }
.footer-author { margin: .2rem 0; }
.footer-author a { color: var(--accent); text-decoration: none; }
.footer-author a:hover { text-decoration: underline; }

/* ═══════════════ Traffic dashboard ═══════════════ */
.traffic-toolbar { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin: 1rem 0; }
.tr-you { color: var(--ok); font-size: .85rem; font-family: ui-monospace, monospace; }
.privacy-note {
  background: rgba(91,140,255,.08); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: 8px; padding: .8rem 1rem; font-size: .88rem; margin: 1rem 0; line-height: 1.5;
}
.kpi-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.kpi-sub { color: var(--muted); font-size: .75rem; margin-top: .3rem; }
.trend { font-weight: 700; }
.trend.up { color: var(--ok); }
.trend.down { color: var(--err); }
.trend.flat { color: var(--muted); }

.tr-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: .8rem; }
.tr-cols .card h3 { margin-top: 0; }

/* SVG chart */
.viz { width: 100%; height: auto; }
.viz-scroll { overflow-x: auto; }
.viz .grid { stroke: var(--border); stroke-width: 1; }
.viz .axis { fill: var(--muted); font-size: 10px; font-family: ui-monospace, monospace; }
.viz .hbar:hover { fill: rgba(255,255,255,.04); }
.legend { display: flex; gap: 1rem; font-size: .82rem; color: var(--muted); margin-bottom: .4rem; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: .35rem; vertical-align: middle; }

/* Horizontal bars */
.hbars { display: flex; flex-direction: column; gap: .35rem; }
.hbar-row { display: grid; grid-template-columns: 90px 1fr 34px; gap: .5rem; align-items: center; font-size: .82rem; }
.hbar-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hbar-track { background: var(--panel2); border-radius: 4px; height: 14px; overflow: hidden; }
.hbar-fill { height: 100%; border-radius: 4px; min-width: 2px; transition: width .3s; }
.hbar-val { text-align: right; color: var(--muted); font-family: ui-monospace, monospace; }

/* Tooltip */
.viz-tip {
  position: fixed; z-index: 100; background: #05070d; color: var(--text);
  border: 1px solid var(--border); border-radius: 6px; padding: .35rem .6rem;
  font-size: .8rem; pointer-events: none; box-shadow: 0 6px 18px rgba(0,0,0,.5);
}
.viz-tip.hidden { display: none; }

/* Feed / traffic tables */
table.feed { width: 100%; border-collapse: collapse; font-size: .8rem; }
table.feed th, table.feed td { padding: .4rem .5rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
table.feed th { color: var(--muted); font-weight: 600; position: sticky; top: 0; background: var(--panel); }
table.feed td.mono, .mono { font-family: ui-monospace, monospace; }
table.feed td.nowrap { white-space: nowrap; }
table.feed tr.synthetic td:first-child::before { content: '✨'; margin-right: .2rem; opacity: .5; }
table.feed tr.is-you { background: rgba(62,207,142,.08); }
.ipm { color: var(--muted); font-family: ui-monospace, monospace; font-size: .92em; }
.muted { color: var(--muted); }
.sens { color: var(--warn); font-size: .92em; white-space: nowrap; }
.badge-chip { display: inline-block; padding: .1rem .4rem; border-radius: 5px; font-size: .78rem; white-space: nowrap; border: 1px solid var(--border); }
.badge-chip.human { color: var(--ok); border-color: var(--ok); }
.badge-chip.bot { color: var(--err); border-color: var(--err); }
.badge-chip.unver { color: var(--warn); border-color: var(--warn); }