:root {
  --bg: #ffffff;
  --band: #f5f7fa;
  --surface: #ffffff;
  --text: #111827;
  --muted: #566070;
  --border: #e3e7ee;
  --primary: #c2261d;
  --primary-2: #1d4ed8;
  --on-primary: #ffffff;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 10px 30px rgba(16, 24, 40, .08);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --band: #111723;
    --surface: #141a24;
    --text: #eef1f5;
    --muted: #9aa4b2;
    --border: #253043;
    --primary: #f26b5b;
    --primary-2: #6ea8ff;
    --on-primary: #0b0f17;
    --code-bg: #070a10;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans Devanagari", sans-serif;
}
a { color: var(--primary-2); }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .9em; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } section { padding: 48px 0; } }
.muted { color: var(--muted); }
.hidden { display: none !important; }
section { padding: 64px 0; }
section.band { background: var(--band); }
h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.1; margin: 10px 0 18px; letter-spacing: -.02em; }
h2 { font-size: 28px; margin: 0 0 20px; letter-spacing: -.01em; }
h3 { font-size: 18px; margin: 28px 0 10px; }

/* Header */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 62px; gap: 12px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); text-decoration: none; white-space: nowrap; }
.logo-mark { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 9px; background: var(--primary); color: var(--on-primary); font-size: 16px; }
.top nav { display: flex; align-items: center; gap: 18px; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.top nav a:hover { color: var(--text); }
.top nav a.btn { color: var(--on-primary); }
.menu-btn { display: none; width: 40px; height: 40px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); cursor: pointer; place-items: center; padding: 0; }
.menu-btn span, .menu-btn span::before, .menu-btn span::after { display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px; position: relative; transition: transform .2s, background .2s; }
.menu-btn span::before, .menu-btn span::after { content: ""; position: absolute; left: 0; }
.menu-btn span::before { top: -6px; }
.menu-btn span::after { top: 6px; }
.menu-btn[aria-expanded="true"] span { background: transparent; }
.menu-btn[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }
@media (max-width: 820px) {
  .menu-btn { display: grid; }
  .top nav { display: none; position: absolute; top: 62px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--border); padding: 8px 16px 16px; box-shadow: var(--shadow); }
  .top nav.open { display: flex; }
  .top nav a { padding: 12px 4px; border-bottom: 1px solid var(--border); font-size: 16px; }
  .top nav a.btn { margin-top: 12px; text-align: center; border-bottom: 0; }
}

/* Buttons */
.btn { display: inline-block; background: var(--primary); color: var(--on-primary); padding: 11px 18px; border-radius: 10px; text-decoration: none; font-weight: 600; border: 1px solid var(--primary); }
.btn:hover { filter: brightness(1.07); }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn.small { padding: 6px 12px; font-size: 14px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 26px; }

/* Hero */
.hero { padding: 72px 0 64px; background: radial-gradient(1200px 400px at 80% -10%, color-mix(in srgb, var(--primary) 12%, transparent), transparent), var(--bg); }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }
.lead { font-size: 18px; color: var(--muted); max-width: 560px; margin: 0; }
.status { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); border: 1px solid var(--border); padding: 4px 12px; border-radius: 99px; margin: 0; background: var(--surface); }
.status .dot { width: 8px; height: 8px; border-radius: 50%; background: #9ca3af; }
.status.up .dot { background: #10b981; box-shadow: 0 0 0 3px rgba(16, 185, 129, .2); }
.status.down .dot { background: #ef4444; }

/* Calendar mock */
.mock { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 18px; box-shadow: var(--shadow); }
.mock-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; font-size: 18px; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; font-size: 12px; }
.seg b, .seg i { padding: 3px 10px; font-style: normal; }
.seg b { background: var(--primary); color: var(--on-primary); }
.mock-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; text-align: center; font-size: 13px; }
.mock-grid .dow { color: var(--muted); font-weight: 600; font-size: 11px; padding-bottom: 4px; }
.mock-grid .d { padding: 6px 0 4px; border-radius: 8px; line-height: 1.1; }
.mock-grid .d small { display: block; font-size: 9px; color: var(--muted); }
.mock-grid .d.sat, .mock-grid .d.hol { color: var(--primary); }
.mock-grid .d.hol { background: color-mix(in srgb, var(--primary) 12%, transparent); }
.mock-grid .d.today { background: var(--primary-2); color: #fff; font-weight: 700; }
.mock-grid .d.today small { color: rgba(255, 255, 255, .8); }
.mock-event { display: flex; align-items: center; gap: 8px; font-size: 13px; margin-top: 10px; }
.mock-event em { color: var(--muted); font-style: normal; margin-left: auto; font-size: 12px; }
.tag { width: 10px; height: 10px; border-radius: 3px; }
.tag.red { background: var(--primary); }
.tag.blue { background: var(--primary-2); }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: s; }
@media (max-width: 800px) { .steps { grid-template-columns: 1fr; } }
.steps li { counter-increment: s; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 20px; color: var(--muted); font-size: 15px; }
.steps li::before { content: counter(s); display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--primary); color: var(--on-primary); font-weight: 700; margin-bottom: 10px; }
.steps strong { color: var(--text); display: block; }

/* Code */
.tabs { display: flex; gap: 4px; margin-top: 18px; }
.tabs button { font: inherit; font-size: 14px; border: 1px solid var(--border); background: var(--surface); color: var(--muted); padding: 6px 14px; border-radius: 8px 8px 0 0; cursor: pointer; }
.tabs button.on { background: var(--code-bg); color: var(--code-text); border-color: var(--code-bg); }
.code { position: relative; background: var(--code-bg); border-radius: 0 12px 12px 12px; }
.code pre { margin: 0; padding: 18px; overflow-x: auto; color: var(--code-text); font-size: 14px; line-height: 1.55; }
.code code { font-size: inherit; }
.copy { position: absolute; top: 10px; right: 10px; font: inherit; font-size: 12px; background: rgba(255, 255, 255, .1); color: var(--code-text); border: 1px solid rgba(255, 255, 255, .2); border-radius: 6px; padding: 3px 10px; cursor: pointer; }

/* Table */
.table { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--band); font-size: 13px; color: var(--muted); }
tr:last-child td { border-bottom: 0; }
td code { white-space: nowrap; }
.more { margin-top: 16px; color: var(--muted); }

/* Links and footer */
.links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 800px) { .links { grid-template-columns: 1fr; } }
.link-card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 20px; text-decoration: none; color: var(--text); transition: transform .15s, box-shadow .15s; }
.link-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.link-card span { display: block; color: var(--muted); font-size: 14px; margin-top: 4px; }
.foot { display: flex; justify-content: space-between; gap: 12px; padding: 28px 20px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--border); margin-top: 0; }

/* Section heads and form controls */
.section-head { margin-bottom: 24px; }
.section-head h2 { margin-bottom: 6px; }
.section-head .sub { margin: 0; color: var(--muted); }
select, input[type="date"] {
  font: inherit; font-size: 15px; color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 9px 12px; min-height: 42px; width: 100%;
}
select:focus, input:focus, button:focus-visible, a:focus-visible { outline: 2px solid var(--primary-2); outline-offset: 2px; }
button.btn { font: inherit; font-weight: 600; cursor: pointer; }
.btn.block { display: block; width: 100%; text-align: center; }
.btn.alt { background: var(--primary-2); border-color: var(--primary-2); }
.pill { display: inline-block; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 99px; color: var(--on-primary); letter-spacing: .04em; }
.pill.red { background: var(--primary); }
.pill.blue { background: var(--primary-2); }

/* Converter */
.conv { display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: stretch; }
.conv-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; box-shadow: var(--shadow); display: grid; gap: 16px; align-content: space-between; }
.conv-label { font-weight: 600; display: flex; align-items: center; gap: 10px; }
.fields { display: grid; grid-template-columns: 1.1fr 1.4fr .9fr; gap: 10px; }
.fields.one { grid-template-columns: 1fr; }
.fields label span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; font-weight: 600; }
.swap { align-self: center; font: inherit; font-size: 13px; font-weight: 600; width: 64px; height: 64px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; box-shadow: var(--shadow); }
.swap:hover { border-color: var(--primary); color: var(--primary); }
@media (max-width: 820px) {
  .conv { grid-template-columns: 1fr; }
  .swap { justify-self: center; width: auto; height: auto; border-radius: 99px; padding: 8px 20px; }
}
@media (max-width: 420px) { .fields { grid-template-columns: 1fr 1fr; } .fields label:nth-child(2) { grid-column: span 2; order: -1; } }
.result { margin-top: 20px; background: var(--band); border: 1px dashed var(--border); border-radius: 16px; padding: 20px; min-height: 86px; }
.result.ok { border-style: solid; background: color-mix(in srgb, var(--primary-2) 6%, var(--surface)); }
.result.err { border-style: solid; border-color: color-mix(in srgb, var(--primary) 50%, var(--border)); color: var(--primary); }
.result p { margin: 0; }
.res-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .res-grid { grid-template-columns: 1fr; } }
.res-item small { display: block; color: var(--muted); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; }
.res-item strong { display: block; font-size: clamp(20px, 3.4vw, 26px); line-height: 1.25; margin: 4px 0 2px; }
.res-item span { color: var(--muted); font-size: 15px; }
.res-foot { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); font-size: 14px; color: var(--muted); }
.link-btn { font: inherit; font-size: 14px; background: none; border: 0; color: var(--primary-2); cursor: pointer; padding: 0; text-decoration: underline; }
.res-foot .link-btn:first-of-type { margin-left: auto; }

/* Calendar */
.cal { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow); overflow: hidden; }
.cal-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.cal-nav { display: flex; align-items: center; gap: 6px; min-width: 0; }
.cal-title { margin: 0 0 0 8px; font-size: 20px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cal-title small { color: var(--muted); font-weight: 500; font-size: 14px; margin-left: 6px; }
.cal-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.cal-tools select { width: auto; min-height: 36px; padding: 6px 10px; font-size: 14px; }
.icon-btn { font: inherit; font-size: 22px; line-height: 1; width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; }
.icon-btn:hover:not(:disabled) { border-color: var(--primary-2); color: var(--primary-2); }
.icon-btn:disabled { opacity: .4; cursor: not-allowed; }
button.btn.small { font-size: 14px; padding: 6px 12px; }
.seg-btn { display: inline-flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.seg-btn button { font: inherit; font-size: 13px; font-weight: 600; border: 0; background: transparent; color: var(--muted); padding: 7px 12px; cursor: pointer; }
.seg-btn button[aria-checked="true"] { background: var(--primary); color: var(--on-primary); }
.cal-body { display: grid; grid-template-columns: minmax(0, 1fr) 300px; }
@media (max-width: 900px) { .cal-body { grid-template-columns: minmax(0, 1fr); } }
.cal-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; padding: 16px; align-content: start; transition: opacity .15s; }
.cal-grid.loading { opacity: .45; }
.cal-grid .dow { text-align: center; font-size: 12px; font-weight: 700; color: var(--muted); padding: 4px 0; text-transform: uppercase; letter-spacing: .04em; }
.cal-grid .dow.we { color: var(--primary); }
.cell { position: relative; font: inherit; text-align: left; min-height: 74px; padding: 8px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); color: var(--text); cursor: pointer; display: flex; flex-direction: column; transition: border-color .12s; }
.cell:hover { border-color: var(--primary-2); }
.cell .n { font-size: 18px; font-weight: 700; line-height: 1.1; }
.cell .alt { font-size: 11px; color: var(--muted); margin-top: 2px; }
.cell .dots { display: flex; gap: 3px; margin-top: auto; padding-top: 4px; flex-wrap: wrap; }
.cell .dots i { width: 6px; height: 6px; border-radius: 50%; background: var(--c, var(--primary-2)); }
.cell.out { opacity: .38; }
.cell.we .n, .cell.hol .n { color: var(--primary); }
.cell.hol { background: color-mix(in srgb, var(--primary) 8%, var(--surface)); }
.cell.today { border: 2px solid var(--primary-2); }
.cell.today::after { content: "Today"; position: absolute; top: 6px; right: 6px; font-size: 9px; font-weight: 700; text-transform: uppercase; color: var(--primary-2); }
.cell.sel { background: var(--primary-2); border-color: var(--primary-2); color: #fff; opacity: 1; }
.cell.sel .n, .cell.sel .alt, .cell.sel.today::after { color: #fff; }
.cell.none { cursor: default; background: transparent; border-style: dashed; }
@media (max-width: 600px) {
  .cal-bar { padding: 12px; }
  .cal-tools { width: 100%; }
  .cal-grid { gap: 3px; padding: 10px 6px; }
  .cell { min-height: 54px; padding: 5px 2px; border-radius: 8px; align-items: center; text-align: center; }
  .cell .n { font-size: 15px; }
  .cell .alt { font-size: 9.5px; }
  .cell .dots { justify-content: center; }
  .cell.today::after { display: none; }
  .cal-grid .dow { font-size: 10px; letter-spacing: 0; }
  .cal-title { font-size: 17px; }
}
.cal-side { border-left: 1px solid var(--border); padding: 16px; background: var(--band); min-width: 0; }
@media (max-width: 900px) { .cal-side { border-left: 0; border-top: 1px solid var(--border); } }
.cal-side h4 { margin: 18px 0 8px; font-size: 13px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.day-card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px; }
.day-card .big { font-size: 22px; font-weight: 700; line-height: 1.2; }
.day-card .sub2 { color: var(--muted); font-size: 14px; margin-top: 4px; }
.day-card .link-btn { margin-top: 10px; }
.ev-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; max-height: 360px; overflow-y: auto; }
.ev-list li { font-size: 14px; }
.ev { display: flex; gap: 10px; align-items: flex-start; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px; }
.ev i { flex: none; width: 10px; height: 10px; border-radius: 3px; margin-top: 6px; background: var(--c, var(--primary-2)); }
.ev b { display: block; font-weight: 600; }
.ev span { color: var(--muted); font-size: 12px; }
.ev .h { color: var(--primary); font-weight: 600; }
.day-card .ev-list { margin-top: 10px; }
.cal-note { margin: 0; padding: 0 18px 14px; font-size: 13px; }
.cal-note:empty { display: none; }