/* Sentinel — nizartuanku.github.io
   Plain CSS, no build step, no external requests. */

:root {
  --bg:        #ffffff;
  --bg-alt:    #f6f7f9;
  --bg-code:   #f2f3f5;
  --fg:        #16191d;
  --fg-muted:  #5b6572;
  --fg-faint:  #8b95a1;
  --rule:      #e2e5ea;
  --rule-soft: #eceef2;
  --accent:    #0e7c86;
  --accent-fg: #0a5d65;
  --warn-bg:   #fff8e6;
  --warn-rule: #e8c96a;
  --warn-fg:   #6b5310;
  --ok:        #1a7f4b;
  --no:        #b03636;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #0f1214;
    --bg-alt:    #161a1d;
    --bg-code:   #1a1f23;
    --fg:        #e6e9ec;
    --fg-muted:  #9aa4b0;
    --fg-faint:  #6f7984;
    --rule:      #262c31;
    --rule-soft: #1e2429;
    --accent:    #3fb6c0;
    --accent-fg: #5fcdd6;
    --warn-bg:   #241f10;
    --warn-rule: #6b5a20;
    --warn-fg:   #e0c877;
    --ok:        #4cc088;
    --no:        #e07070;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---- masthead ---- */

header.top {
  border-bottom: 1px solid var(--rule);
  padding: 1.1rem 0;
  margin-bottom: 3rem;
  background: var(--bg);
}
header.top .wrap {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  flex-wrap: wrap;
}
header.top .brand {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  color: var(--fg);
  text-decoration: none;
}
header.top nav {
  margin-left: auto;
  display: flex;
  gap: 1.1rem;
  font-size: 0.87rem;
}
header.top nav a { color: var(--fg-muted); text-decoration: none; }
header.top nav a:hover { color: var(--accent-fg); }

/* ---- type ---- */

h1 {
  font-size: 2.05rem;
  line-height: 1.2;
  letter-spacing: -0.022em;
  margin: 0 0 0.9rem;
  font-weight: 680;
}
h2 {
  font-size: 1.25rem;
  line-height: 1.3;
  letter-spacing: -0.012em;
  margin: 3rem 0 0.9rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--rule-soft);
  font-weight: 650;
}
h3 {
  font-size: 1.02rem;
  margin: 2rem 0 0.6rem;
  font-weight: 650;
}
p { margin: 0 0 1.05rem; }

.lede {
  font-size: 1.12rem;
  color: var(--fg-muted);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 0.7rem;
}

a { color: var(--accent-fg); text-decoration: none; border-bottom: 1px solid var(--rule); }
a:hover { border-bottom-color: var(--accent); }

strong { font-weight: 640; }

ul, ol { margin: 0 0 1.05rem; padding-left: 1.3rem; }
li { margin-bottom: 0.4rem; }

/* ---- code ---- */

code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--bg-code);
  padding: 0.12em 0.36em;
  border-radius: 3px;
}
pre {
  background: var(--bg-code);
  border: 1px solid var(--rule-soft);
  border-radius: 6px;
  padding: 0.95rem 1.1rem;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.6;
  margin: 0 0 1.2rem;
}
pre code { background: none; padding: 0; font-size: inherit; }

/* ---- tables ---- */

.tablewrap { overflow-x: auto; margin: 0 0 1.4rem; }
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9rem;
}
th, td {
  text-align: left;
  padding: 0.55rem 0.8rem 0.55rem 0;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
th {
  font-weight: 620;
  color: var(--fg-muted);
  font-size: 0.79rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border-bottom-color: var(--rule);
}
td.y { color: var(--ok); font-weight: 600; }
td.n { color: var(--no); }

/* ---- callouts ---- */

.note {
  background: var(--bg-alt);
  border-left: 3px solid var(--accent);
  padding: 0.9rem 1.1rem;
  margin: 0 0 1.4rem;
  font-size: 0.95rem;
}
.note p:last-child { margin-bottom: 0; }

.warn {
  background: var(--warn-bg);
  border-left: 3px solid var(--warn-rule);
  color: var(--warn-fg);
  padding: 0.9rem 1.1rem;
  margin: 0 0 1.4rem;
  font-size: 0.95rem;
}
.warn p:last-child { margin-bottom: 0; }
.warn strong { color: inherit; }

/* ---- cards ---- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.9rem;
  margin: 0 0 1.6rem;
}
.card {
  border: 1px solid var(--rule);
  border-radius: 7px;
  padding: 1rem 1.05rem;
  background: var(--bg);
}
.card h3 {
  margin: 0 0 0.3rem;
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}
.card h3 a { border: none; }
.card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--fg-muted);
  line-height: 1.55;
}

/* ---- buttons ---- */

.actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 0 0 1.6rem; }
.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 0.5rem 0.95rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--fg);
  text-decoration: none;
  background: var(--bg-alt);
}
.btn:hover { border-color: var(--accent); color: var(--accent-fg); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.primary:hover { opacity: 0.9; color: #fff; }

/* ---- footer ---- */

footer.bottom {
  margin-top: 4rem;
  border-top: 1px solid var(--rule);
  padding: 1.6rem 0 3rem;
  font-size: 0.85rem;
  color: var(--fg-faint);
}
footer.bottom a { color: var(--fg-muted); }
footer.bottom p { margin: 0 0 0.4rem; }

/* ---- misc ---- */

.meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--fg-faint);
  margin: 0 0 2.4rem;
}
hr {
  border: none;
  border-top: 1px solid var(--rule-soft);
  margin: 2.4rem 0;
}
main { padding-bottom: 1rem; }

@media (max-width: 34rem) {
  body { font-size: 16px; }
  h1 { font-size: 1.7rem; }
  header.top nav { width: 100%; margin-left: 0; }
}