:root {
  --bg: #f6f7fb;
  --c: #fff;
  --t: #0f172a;
  --m: #64748b;
  --b: #e5e9f0;
  --a: #4f46e5;
  --a2: #7c3aed;
  --soft: #eef0ff;
  --sh: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 28px rgba(15, 23, 42, 0.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0e14;
    --c: #141923;
    --t: #e8ecf4;
    --m: #8b97ab;
    --b: #262d3a;
    --a: #818cf8;
    --a2: #a78bfa;
    --soft: #1b2033;
    --sh: 0 8px 28px rgba(0, 0, 0, 0.35);
  }
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font:
    16px/1.65 Inter,
    system-ui,
    -apple-system,
    'Segoe UI',
    sans-serif;
  background: var(--bg);
  color: var(--t);
  -webkit-font-smoothing: antialiased;
}
header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--b);
}
.in,
main,
footer {
  max-width: 960px;
  margin: auto;
  padding: 0 20px;
}
.in {
  padding-top: 14px;
  padding-bottom: 12px;
}
.logo {
  display: block;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.2px;
  color: var(--t);
  text-decoration: none;
  margin-bottom: 8px;
}
.logo:before {
  content: '₱';
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin-right: 8px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--a), var(--a2));
  font-size: 15px;
}
nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
nav a {
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--m);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: 0.15s;
}
nav a:hover {
  background: var(--soft);
  color: var(--a);
}
nav a.on {
  background: var(--soft);
  color: var(--a);
  font-weight: 600;
}
main {
  padding-top: 36px;
  padding-bottom: 40px;
}
h1 {
  font-size: clamp(26px, 4.5vw, 38px);
  letter-spacing: -0.8px;
  line-height: 1.15;
  margin: 0 0 14px;
  background: linear-gradient(135deg, var(--t), var(--a));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
h2 {
  font-size: 22px;
  letter-spacing: -0.3px;
  margin: 36px 0 10px;
}
p {
  margin: 10px 0;
}
a {
  color: var(--a);
}
.box {
  background: var(--c);
  border: 1px solid var(--b);
  border-radius: 18px;
  padding: 24px;
  margin: 18px 0;
  box-shadow: var(--sh);
}
.box > b {
  display: block;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--m);
  margin-bottom: 6px;
}
.row {
  display: flex;
  gap: 14px;
  align-items: center;
  margin: 12px 0;
}
.row label {
  flex: 1;
  font-weight: 500;
  font-size: 15px;
}
.row input,
.row select {
  flex: 1.3;
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--b);
  border-radius: 12px;
  font: inherit;
  background: var(--bg);
  color: var(--t);
  transition: 0.15s;
}
.row input:focus,
.row select:focus {
  outline: 0;
  border-color: var(--a);
  box-shadow: 0 0 0 4px var(--soft);
}
button {
  display: block;
  width: 100%;
  margin: 20px 0 0;
  padding: 14px;
  border: 0;
  border-radius: 12px;
  color: #fff;
  font: 600 15px inherit;
  letter-spacing: 1.5px;
  cursor: pointer;
  background: linear-gradient(135deg, var(--a), var(--a2));
  box-shadow: 0 6px 18px rgba(99, 102, 241, 0.35);
  transition: 0.15s;
}
button:hover {
  transform: translateY(-1px);
  filter: brightness(1.07);
}
.res {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
@media (max-width: 700px) {
  .res {
    grid-template-columns: 1fr;
  }
  .row {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }
}
.res .box {
  margin: 6px 0;
}
.res .row {
  margin: 0;
  padding: 11px 0;
  border-bottom: 1px solid var(--b);
}
.res .row:last-child {
  border: 0;
}
.res .row span {
  flex: 1;
  text-align: right;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}
.res .row:last-child span {
  color: var(--a);
  font-size: 18px;
}
.sc {
  overflow-x: auto;
  border: 1px solid var(--b);
  border-radius: 14px;
  background: var(--c);
  box-shadow: var(--sh);
  margin: 14px 0;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
th,
td {
  padding: 11px 14px;
  text-align: right;
  border-bottom: 1px solid var(--b);
}
td:first-child,
th:first-child {
  text-align: left;
}
th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--m);
  background: var(--soft);
  position: sticky;
  top: 0;
}
tbody tr:nth-child(even),
table tr:nth-child(even) td {
  background: color-mix(in srgb, var(--soft) 40%, transparent);
}
tr:last-child td {
  border: 0;
}
pre {
  background: var(--c);
  border: 1px solid var(--b);
  border-left: 4px solid var(--a);
  padding: 16px 18px;
  overflow-x: auto;
  border-radius: 12px;
  font:
    13.5px/1.7 ui-monospace,
    SFMono-Regular,
    Menlo,
    monospace;
}
.m {
  color: var(--m);
  font-size: 14px;
}
footer {
  padding-top: 24px;
  padding-bottom: 36px;
  border-top: 1px solid var(--b);
  font-size: 13px;
  color: var(--m);
}
footer a {
  color: var(--m);
  margin-right: 14px;
  text-decoration: none;
}
footer a:hover {
  color: var(--a);
}