/* ───────────────────────── AlertX marketing site ─────────────────────────
   Dark-first. Light theme via prefers-color-scheme or an explicit toggle.
   All colours are tokens so both themes stay consistent.
   ------------------------------------------------------------------------- */

:root {
  /* dark palette (default) */
  --bg: #0a0e14;
  --bg-2: #0d1219;
  --surface: #111824;
  --surface-2: #161f2e;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --fg: #e7edf5;
  --fg-dim: #aebaca;
  --muted: #7c8a9c;
  --accent: #35d6a4;      /* uptime green */
  --accent-2: #5b9dff;    /* signal blue */
  --accent-ink: #052016;  /* text on accent */
  --down: #ff5f6e;
  --warn: #ffb648;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.65);
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1120px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f8fc;
    --bg-2: #eef2f8;
    --surface: #ffffff;
    --surface-2: #f1f5fa;
    --border: rgba(12, 20, 32, 0.10);
    --border-strong: rgba(12, 20, 32, 0.18);
    --fg: #0e1724;
    --fg-dim: #3a4a5e;
    --muted: #5f7085;
    --accent: #0f9d6b;
    --accent-2: #2563eb;
    --accent-ink: #ffffff;
    --down: #d63649;
    --warn: #b8730a;
    --shadow: 0 20px 44px -22px rgba(20, 40, 70, 0.28);
    color-scheme: light;
  }
}

:root[data-theme="light"] {
  --bg: #f6f8fc;
  --bg-2: #eef2f8;
  --surface: #ffffff;
  --surface-2: #f1f5fa;
  --border: rgba(12, 20, 32, 0.10);
  --border-strong: rgba(12, 20, 32, 0.18);
  --fg: #0e1724;
  --fg-dim: #3a4a5e;
  --muted: #5f7085;
  --accent: #0f9d6b;
  --accent-2: #2563eb;
  --accent-ink: #ffffff;
  --down: #d63649;
  --warn: #b8730a;
  --shadow: 0 20px 44px -22px rgba(20, 40, 70, 0.28);
  color-scheme: light;
}

/* ───────────────────────── reset / base ───────────────────────── */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 {
  font-family: "Space Grotesk", "Inter", system-ui, sans-serif;
  line-height: 1.12;
  text-wrap: balance;
  margin: 0;
  letter-spacing: -0.01em;
}
p { margin: 0; }
code, pre, .mono { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
code { font-size: 0.9em; background: var(--surface-2); padding: 0.1em 0.4em; border-radius: 6px; }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 20px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 16px; border-radius: 0 0 8px 0; z-index: 100; font-weight: 600;
}
.skip:focus { left: 0; }

/* ───────────────────────── buttons ───────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 0.98rem;
  padding: 12px 20px; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease, box-shadow .15s ease;
  white-space: nowrap;
}
.btn-sm { padding: 8px 14px; font-size: 0.9rem; }
.btn-primary {
  background: var(--accent); color: var(--accent-ink);
  box-shadow: 0 10px 28px -12px color-mix(in srgb, var(--accent) 80%, transparent);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -14px color-mix(in srgb, var(--accent) 85%, transparent); }
.btn-ghost {
  background: transparent; color: var(--fg);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ───────────────────────── header ───────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border);
  padding-top: env(safe-area-inset-top, 0px);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark { display: block; }
.brand-name { font-family: "Space Grotesk", sans-serif; font-size: 1.25rem; letter-spacing: -0.02em; }
.brand-x { color: var(--accent); }
.nav { display: flex; gap: 26px; margin-left: 10px; font-size: 0.95rem; color: var(--fg-dim); }
.nav a { transition: color .15s ease; }
.nav a:hover { color: var(--fg); }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }

.theme-toggle {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--fg-dim); cursor: pointer; transition: color .15s, border-color .15s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.icon-moon { display: none; }
:root[data-theme="light"] .icon-sun { display: none; }
:root[data-theme="light"] .icon-moon { display: block; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .icon-sun { display: none; }
  :root:not([data-theme="dark"]) .icon-moon { display: block; }
}

/* ───────────────────────── hero ───────────────────────── */
.hero { position: relative; padding-block: clamp(48px, 8vw, 104px); overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto -10%; height: 520px; z-index: -1;
  background:
    radial-gradient(60% 60% at 20% 10%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%),
    radial-gradient(50% 50% at 85% 0%, color-mix(in srgb, var(--accent-2) 20%, transparent), transparent 70%);
  filter: blur(10px); opacity: 0.8;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 54px; align-items: center; }
.hero-copy { min-width: 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.82rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--fg-dim); background: var(--surface); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 20px;
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent); }
.hero h1 { font-size: clamp(2.2rem, 5.6vw, 3.9rem); font-weight: 700; margin-bottom: 20px; }
.lede { font-size: clamp(1.02rem, 1.6vw, 1.2rem); color: var(--fg-dim); max-width: 42ch; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.cta-row.center { justify-content: center; }
.hero-points { list-style: none; margin: 30px 0 0; padding: 0; display: grid; gap: 10px; color: var(--muted); font-size: 0.95rem; }
.hero-points li { position: relative; padding-left: 26px; }
.hero-points li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--accent); font-weight: 700;
}

/* hero board */
.hero-visual { position: relative; min-width: 0; }
.board-glow {
  position: absolute; inset: 8% 6%; z-index: -1; border-radius: 30px;
  background: radial-gradient(60% 60% at 50% 30%, color-mix(in srgb, var(--accent) 24%, transparent), transparent 72%);
  filter: blur(26px);
}
.board {
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border-strong); border-radius: 18px;
  box-shadow: var(--shadow); padding: 18px; overflow: hidden;
}
.board-head { display: flex; align-items: center; justify-content: space-between; padding: 4px 6px 14px; border-bottom: 1px solid var(--border); }
.board-title { display: inline-flex; align-items: center; gap: 10px; font-family: "Space Grotesk", sans-serif; font-weight: 600; }
.board-meta { font-size: 0.78rem; color: var(--muted); }
.status-blip { width: 9px; height: 9px; border-radius: 50%; }
.status-blip.up { background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.board-rows { display: grid; gap: 4px; padding-top: 10px; }
.row {
  display: grid; grid-template-columns: 58px 1fr 120px 54px; align-items: center; gap: 12px;
  padding: 10px 6px; border-radius: 10px; font-size: 0.86rem;
}
.row:hover { background: var(--surface-2); }
.row .mon { color: var(--fg-dim); font-family: "JetBrains Mono", monospace; font-size: 0.82rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row .ms { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; font-size: 0.8rem; }
.pill {
  font-size: 0.66rem; font-weight: 700; letter-spacing: 0.05em;
  padding: 3px 8px; border-radius: 6px; text-align: center; text-transform: uppercase;
}
.pill.up { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.pill.down { background: color-mix(in srgb, var(--down) 18%, transparent); color: var(--down); }
.pill.warn { background: color-mix(in srgb, var(--warn) 20%, transparent); color: var(--warn); }
.pill.mute { background: var(--surface-2); color: var(--muted); }
.spark { width: 100%; height: 26px; }
.spark polyline { fill: none; stroke: var(--accent); stroke-width: 2; vector-effect: non-scaling-stroke; }
.spark.bad polyline { stroke: var(--down); }

/* ───────────────────────── stat strip ───────────────────────── */
.strip { border-block: 1px solid var(--border); background: var(--bg-2); }
.strip-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding-block: 34px; text-align: center; }
.stat { display: grid; gap: 4px; }
.stat-num { font-family: "Space Grotesk", sans-serif; font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 700; color: var(--accent); }
.stat-label { color: var(--muted); font-size: 0.88rem; }

/* ───────────────────────── sections ───────────────────────── */
.section { padding-block: clamp(56px, 9vw, 104px); }
.section.alt { background: var(--bg-2); border-block: 1px solid var(--border); }
.section-head { max-width: 640px; margin: 0 auto clamp(36px, 5vw, 56px); text-align: center; }
.kicker {
  display: inline-block; font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); font-weight: 700; }
.section-sub { color: var(--fg-dim); margin-top: 14px; font-size: 1.05rem; }

/* protocols */
.proto-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.proto {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; transition: border-color .15s ease, transform .15s ease;
}
.proto:hover { border-color: var(--accent); transform: translateY(-3px); }
.proto h3 { font-family: "JetBrains Mono", monospace; font-size: 1.02rem; color: var(--accent); margin-bottom: 8px; }
.proto p { color: var(--fg-dim); font-size: 0.94rem; }

/* feature grid */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-3px); box-shadow: var(--shadow); }
.card .ic {
  width: 46px; height: 46px; display: grid; place-items: center; font-size: 22px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 16px;
}
.card h3 { font-size: 1.14rem; margin-bottom: 8px; }
.card p { color: var(--fg-dim); font-size: 0.95rem; }

/* spotlight */
.spotlight { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.spotlight.reverse .spotlight-copy { order: 2; }
.spotlight-copy .kicker { margin-bottom: 10px; }
.spotlight-copy h2 { font-size: clamp(1.6rem, 3.2vw, 2.3rem); font-weight: 700; margin-bottom: 16px; }
.spotlight-copy p { color: var(--fg-dim); font-size: 1.04rem; }
.checklist { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 12px; }
.checklist li { position: relative; padding-left: 30px; color: var(--fg); }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 6px; width: 18px; height: 18px; border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  box-shadow: inset 0 0 0 2px var(--accent);
}
.checklist li::after {
  content: ""; position: absolute; left: 6px; top: 10px; width: 5px; height: 9px;
  border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(40deg);
}

/* map svg */
.spotlight-visual { min-width: 0; }
.map {
  width: 100%; height: auto; background: var(--surface);
  border: 1px solid var(--border-strong); border-radius: var(--radius); box-shadow: var(--shadow); padding: 10px;
}
.map .link { stroke-width: 2.2; vector-effect: non-scaling-stroke; }
.map .link.tunnel { stroke: var(--accent-2); stroke-dasharray: 7 5; }
.map .link.wan { stroke: var(--muted); }
.map .link-label { fill: var(--muted); font-size: 10px; font-family: "JetBrains Mono", monospace; text-anchor: middle; }
.map .node rect { fill: var(--surface-2); stroke: var(--border-strong); stroke-width: 1.5; }
.map .node text { fill: var(--fg); font-size: 12px; font-weight: 600; text-anchor: middle; font-family: "Space Grotesk", sans-serif; }
.map .node.down rect { stroke: var(--down); }
.map .n-dot.up { fill: var(--accent); }
.map .n-dot.down { fill: var(--down); }

/* dependency viz */
.dep {
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 26px; text-align: center;
}
.dep-node {
  display: inline-flex; align-items: center; gap: 10px; justify-content: center;
  padding: 12px 16px; border-radius: 12px; font-family: "JetBrains Mono", monospace; font-size: 0.9rem;
  border: 1px solid var(--border); background: var(--surface-2);
}
.dep-node.root.down { border-color: var(--down); }
.dep-node.muted { opacity: 0.6; }
.dep-arrow { color: var(--muted); font-size: 0.82rem; margin: 14px 0; }
.dep-arrow em { color: var(--accent); font-style: normal; }
.dep-children { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.dep-foot { margin-top: 20px; font-size: 0.86rem; color: var(--fg-dim); border-top: 1px dashed var(--border); padding-top: 16px; }

/* editions */
.editions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; max-width: 880px; margin-inline: auto; }
.edition {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px;
}
.edition.featured { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }
.edition-badge {
  position: absolute; top: -12px; right: 24px; background: var(--accent); color: var(--accent-ink);
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 4px 12px; border-radius: 999px;
}
.edition h3 { font-size: 1.5rem; }
.edition-tag { color: var(--muted); margin-top: 6px; font-size: 0.95rem; }
.edition-list { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 12px; }
.edition-list li { position: relative; padding-left: 26px; color: var(--fg-dim); font-size: 0.95rem; }
.edition-list li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.edition-list li.inc { color: var(--fg); font-weight: 600; }

/* managed / deployment */
.netnote {
  max-width: 880px; margin: 0 auto 26px; display: flex; gap: 14px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm); padding: 18px 22px;
}
.netnote-ic { font-size: 22px; line-height: 1.3; }
.netnote p { color: var(--fg-dim); font-size: 0.96rem; }
.netnote strong { color: var(--fg); }
.ways { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; max-width: 880px; margin-inline: auto; }
.way {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px;
}
.way-tag {
  align-self: flex-start; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; padding: 4px 11px; border-radius: 999px; margin-bottom: 14px;
}
.way-tag.default { background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }
.way-tag.service { background: var(--accent); color: var(--accent-ink); }
.way h3 { font-size: 1.4rem; }
.way > p { color: var(--muted); margin-top: 6px; }
.way .checklist { margin-top: 20px; }
.way-cta { margin-top: 24px; align-self: flex-start; }

/* chips */
.chips { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.chips li {
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
  padding: 10px 20px; font-weight: 500; font-size: 0.95rem; color: var(--fg-dim);
  transition: border-color .15s ease, color .15s ease;
}
.chips li:hover { border-color: var(--accent); color: var(--fg); }

/* terminal */
.terminal {
  background: #0b0f16; border: 1px solid var(--border-strong); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
}
.term-bar { display: flex; gap: 7px; padding: 12px 14px; background: rgba(255,255,255,0.03); border-bottom: 1px solid var(--border); }
.term-bar span { width: 11px; height: 11px; border-radius: 50%; background: #333d4d; }
.term-bar span:nth-child(1) { background: #ff5f57; }
.term-bar span:nth-child(2) { background: #febc2e; }
.term-bar span:nth-child(3) { background: #28c840; }
.terminal pre { margin: 0; padding: 18px; overflow-x: auto; font-size: 0.82rem; line-height: 1.7; color: #cdd6e4; }
.terminal .c-c { color: #5f7085; }
.terminal .c-k { color: #5b9dff; }
.terminal .c-s { color: #35d6a4; }
.terminal .c-o { color: #ffb648; }

/* self-hosted */
.self .section-head { margin-bottom: 40px; }
.self-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.self-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.self-item h3 { font-size: 1.15rem; margin-bottom: 8px; }
.self-item p { color: var(--fg-dim); font-size: 0.95rem; }

/* cta band */
.cta-band {
  padding-block: clamp(60px, 9vw, 100px);
  background:
    radial-gradient(60% 120% at 50% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%),
    var(--bg-2);
  border-top: 1px solid var(--border);
}
.cta-inner { text-align: center; max-width: 620px; }
.cta-inner h2 { font-size: clamp(1.8rem, 3.8vw, 2.6rem); font-weight: 700; }
.cta-inner p { color: var(--fg-dim); margin-top: 14px; font-size: 1.08rem; }
.cta-inner .cta-row { margin-top: 30px; }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding-block: 36px; padding-bottom: calc(36px + env(safe-area-inset-bottom, 0px)); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; justify-content: space-between; }
.foot-brand { display: inline-flex; align-items: center; gap: 10px; font-family: "Space Grotesk", sans-serif; font-weight: 700; }
.foot-nav { display: flex; gap: 22px; color: var(--fg-dim); font-size: 0.92rem; }
.foot-nav a:hover { color: var(--accent); }
.foot-note { color: var(--muted); font-size: 0.86rem; width: 100%; margin-top: 4px; }

/* ───────────────────────── responsive ───────────────────────── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .spotlight { grid-template-columns: 1fr; gap: 32px; }
  .spotlight.reverse .spotlight-copy { order: 0; }
  .proto-grid, .feature-grid, .self-grid { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; }
}
@media (max-width: 620px) {
  .strip-grid { grid-template-columns: repeat(2, 1fr); gap: 26px 12px; }
  .proto-grid, .feature-grid, .self-grid, .editions, .ways { grid-template-columns: 1fr; }
  .lede { max-width: none; }
  .foot-nav { gap: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}