/* Prizebond Checker. Art direction: bond certificate & security paper.
   Cream security paper, bond green ink, stamp vermilion, gold-foil brass, serial-number mono. */

:root {
  --paper: #f3ecdc;
  --paper-2: #ebe2cc;
  --surface: #fbf7ee;
  --ink: #1b221e;
  --muted: #5a5e52;
  --line: #d3c6a6;
  --line-strong: #b5a47e;
  --green: #0f4a37;
  --green-2: #1f6a51;
  --green-soft: #dfe7d6;
  --on-green: #f3ecdc;
  --red: #b2361d;
  --red-soft: #f6dfd5;
  --brass: #96742a;
  --warn-soft: #f4e6c2;
  --warn: #7a5410;

  --f-display: "DM Serif Display", Georgia, serif;
  --f-body: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  --f-bn: "Tiro Bangla", "Noto Serif Bengali", "Nirmala UI", serif;

  --radius: 4px;
  --ease: cubic-bezier(.2,.7,.2,1);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #121713;
    --paper-2: #182019;
    --surface: #1b231d;
    --ink: #ece4d0;
    --muted: #a8a690;
    --line: #2f3a31;
    --line-strong: #4b5a4d;
    --green: #7cc6a2;
    --green-2: #9fd8bb;
    --green-soft: #1f3529;
    --on-green: #0f1712;
    --red: #f08466;
    --red-soft: #3a211b;
    --brass: #d6b469;
    --warn-soft: #362c16;
    --warn: #f0cd7a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #121713; --paper-2: #182019; --surface: #1b231d; --ink: #ece4d0; --muted: #a8a690;
  --line: #2f3a31; --line-strong: #4b5a4d; --green: #7cc6a2; --green-2: #9fd8bb; --green-soft: #1f3529;
  --on-green: #0f1712; --red: #f08466; --red-soft: #3a211b; --brass: #d6b469; --warn-soft: #362c16; --warn: #f0cd7a;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
html, body { margin: 0; }
body {
  background-color: var(--paper);
  /* faint security-paper fibre texture */
  background-image:
    radial-gradient(circle at 20% 30%, rgba(150,116,42,.05) 0 1px, transparent 1.5px),
    radial-gradient(circle at 70% 80%, rgba(15,74,55,.04) 0 1px, transparent 1.5px);
  background-size: 7px 7px, 11px 11px;
  color: var(--ink);
  font: 16px/1.55 var(--f-body);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}
[lang="bn"] { font-family: var(--f-bn); }
a { color: var(--green); }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }
code { font-family: var(--f-mono); font-size: .9em; background: var(--paper-2); padding: 1px 5px; border-radius: 3px; }
em { font-style: italic; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 16px; }

/* ================= Shared tool styles (index + admin) ================= */
.wrap { max-width: 960px; margin: 0 auto; padding: 32px 16px 64px; }

header.top { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 28px; padding-bottom: 18px; border-bottom: 1px solid var(--line-strong); }
header.top h1 { margin: 0; font: 400 40px/1.05 var(--f-display); letter-spacing: -.01em; }
header.top p { margin: 6px 0 0; color: var(--muted); }
header.top a { color: var(--green); font-weight: 600; text-decoration: none; }
header.top a:hover { text-decoration: underline; text-underline-offset: 3px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 18px;
  position: relative;
}
.card > h2 { margin: 0 0 4px; font: 600 20px/1.2 var(--f-body); display: flex; align-items: center; gap: 12px; letter-spacing: -.01em; }
.card h2 .step {
  display: inline-grid; place-items: center;
  width: 30px; height: 30px; border-radius: 50%;
  border: 1.5px solid var(--green); color: var(--green);
  font: 500 14px/1 var(--f-mono);
}
.card .sub { margin: 0 0 18px; color: var(--muted); }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 13px; color: var(--muted); font-weight: 500; }

input[type=text], input[type=number], input[type=date], select, textarea {
  font: inherit; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 9px 11px; min-width: 0;
  transition: border-color .15s, box-shadow .15s;
}
input[type=file] { font: inherit; color: var(--muted); max-width: 100%; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px var(--green-soft); }
textarea { width: 100%; min-height: 90px; resize: vertical; font-family: var(--f-mono); }
.num-input { width: 140px; font-family: var(--f-mono); letter-spacing: .04em; }
select { font-family: var(--f-bn), var(--f-body); }

button {
  font: 500 15px/1.2 var(--f-body); cursor: pointer;
  border: 1px solid var(--line-strong); background: transparent; color: var(--ink);
  border-radius: var(--radius); padding: 10px 16px;
  transition: background .15s, border-color .15s, color .15s, transform .15s var(--ease);
}
button:hover:not(:disabled) { border-color: var(--ink); }
button:active:not(:disabled) { transform: translateY(1px); }
button.primary { background: var(--green); color: var(--on-green); border-color: var(--green); font-weight: 600; }
button.primary:hover:not(:disabled) { background: var(--green-2); border-color: var(--green-2); }
button.danger { color: var(--red); }
button.danger:hover:not(:disabled) { border-color: var(--red); }
button.link { background: none; border: none; color: var(--green); padding: 4px 6px; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-strong); }
button.link:hover { text-decoration-color: currentColor; }
button:disabled { opacity: .45; cursor: not-allowed; }

.choice { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line-strong); border-radius: var(--radius); overflow: hidden; }
.choice button { padding: 18px 20px; text-align: left; border: none; border-radius: 0; background: var(--paper); }
.choice button + button { border-left: 1px solid var(--line-strong); }
.choice button strong { display: block; font-size: 16px; margin-bottom: 2px; }
.choice button span { color: var(--muted); font-size: 14px; }
.choice button:hover { background: var(--paper-2); }
.choice button.active { background: var(--green); color: var(--on-green); }
.choice button.active span { color: inherit; opacity: .8; }
@media (max-width: 560px) {
  .choice { grid-template-columns: 1fr; }
  .choice button + button { border-left: none; border-top: 1px solid var(--line-strong); }
}

.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin: 18px 0 16px; }
.tabs button { border: none; background: none; border-bottom: 2px solid transparent; border-radius: 0; padding: 10px 12px; color: var(--muted); margin-bottom: -1px; }
.tabs button:hover { color: var(--ink); }
.tabs button.active { color: var(--ink); border-bottom-color: var(--red); font-weight: 600; }

.panel { margin-top: 18px; }
.hidden { display: none !important; }

.msg { border-radius: var(--radius); padding: 11px 14px; margin-top: 14px; font-size: 14px; border-left: 3px solid; }
.msg.ok { background: var(--green-soft); border-color: var(--green); }
.msg.err { background: var(--red-soft); color: var(--red); border-color: var(--red); }
.msg.warn { background: var(--warn-soft); color: var(--warn); border-color: var(--brass); }
.msg ul { margin: 6px 0 0; padding-left: 20px; }
.msg:not(.ok):not(.err):not(.warn) { border: none; padding: 0; }

.list-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin: 22px 0 10px; }
.list-head .count { font: 600 15px var(--f-mono); }
.list-head .actions { display: flex; gap: 8px; flex-wrap: wrap; }

.table-wrap { max-height: 360px; overflow: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 9px 14px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { position: sticky; top: 0; background: var(--paper-2); font: 600 11px/1.4 var(--f-body); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); z-index: 1; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: color-mix(in srgb, var(--paper-2) 60%, transparent); }
td.num { font-family: var(--f-mono); letter-spacing: .06em; }
td.right, th.right { text-align: right; }
.empty { color: var(--muted); padding: 20px; text-align: center; }

.summary { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line-strong); border-radius: var(--radius); margin-bottom: 18px; background: var(--paper); }
.stat { padding: 14px 16px; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat .k { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; font-weight: 600; }
.stat .v { font: 400 30px/1.1 var(--f-display); margin-top: 4px; }
.stat.win .v { color: var(--red); }
@media (max-width: 620px) {
  .summary { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3) { border-left: none; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
}

/* Winner badge as a rubber stamp */
.badge {
  display: inline-block; padding: 2px 8px;
  border: 1.5px solid var(--red); color: var(--red); border-radius: 3px;
  font: 600 11px/1.4 var(--f-mono); text-transform: uppercase; letter-spacing: .08em;
  transform: rotate(-3deg);
  animation: stamp .45s var(--ease) both;
}
@keyframes stamp { from { transform: rotate(-3deg) scale(1.8); opacity: 0; } to { transform: rotate(-3deg) scale(1); opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .badge { animation: none; } }

details.draw { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 10px; background: var(--surface); }
details.draw summary { cursor: pointer; padding: 14px 16px; display: flex; justify-content: space-between; gap: 10px; list-style: none; }
details.draw summary::-webkit-details-marker { display: none; }
details.draw summary b { font: 400 20px/1.2 var(--f-display); }
details.draw summary span:last-child { font: 500 13px var(--f-mono); color: var(--muted); align-self: center; }
details.draw[open] summary { border-bottom: 1px dashed var(--line); }
details.draw .body { padding: 6px 16px 16px; }
.prize-group { margin-top: 12px; }
.prize-group h4 { margin: 0 0 7px; font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font: 500 13px/1 var(--f-mono); letter-spacing: .05em; background: var(--paper); border: 1px solid var(--line); border-radius: 3px; padding: 6px 8px; }
.prize-group:first-child .chip, .prize-group:nth-child(2) .chip { border-color: var(--red); color: var(--red); }

.note { color: var(--muted); font-size: 14px; margin-top: 12px; }
footer { color: var(--muted); font-size: 13px; }

/* ================= Landing page ================= */
.landing { overflow-x: hidden; }

.section-label {
  font: 600 12px/1 var(--f-mono); text-transform: uppercase; letter-spacing: .14em;
  color: var(--red); display: flex; align-items: center; gap: 10px; margin-bottom: 18px;
}
.section-label::before { content: ""; width: 22px; height: 1.5px; background: currentColor; }

.landing h2:not(.card > h2) { font: 400 clamp(34px, 5vw, 56px)/1.02 var(--f-display); letter-spacing: -.015em; margin: 0; }
.landing h2 em { color: var(--green); }

/* ---- nav ---- */
.nav { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.nav.scrolled { border-bottom-color: var(--line-strong); }
.nav-inner { max-width: 1240px; margin: 0 auto; padding: 14px 24px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font: 600 17px var(--f-body); letter-spacing: -.01em; }
.wordmark em { font-family: var(--f-display); font-weight: 400; font-size: 19px; margin-left: 3px; color: var(--green); }
.wm-mark { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; border: 1.5px solid var(--ink); font: 400 16px var(--f-display); }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: var(--ink); text-decoration: none; font-size: 15px; position: relative; }
.nav-links a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 1.5px; background: var(--red); transform: scaleX(0); transform-origin: left; transition: transform .25s var(--ease); }
.nav-links a:not(.nav-cta):hover::after { transform: scaleX(1); }
.nav-cta { border: 1.5px solid var(--ink); padding: 8px 14px; border-radius: var(--radius); font-weight: 600; transition: background .15s, color .15s; }
.nav-cta:hover { background: var(--ink); color: var(--paper); }
.nav-cta { white-space: nowrap; }
@media (max-width: 760px) { .nav-links a:not(.nav-cta) { display: none; } .nav-inner { padding: 12px 16px; } .nav-cta { padding: 7px 11px; font-size: 14px; } }

/* ---- buttons ---- */
.btn { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 600 16px/1 var(--f-body); padding: 16px 22px; border-radius: var(--radius); transition: background .15s, transform .2s var(--ease), box-shadow .2s; }
.btn span { transition: transform .2s var(--ease); }
.btn:hover span { transform: translateX(4px); }
.btn-primary { background: var(--green); color: var(--on-green); box-shadow: 4px 4px 0 var(--ink); }
.btn-primary:hover { background: var(--green-2); transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--ink); }
.btn-text { color: var(--ink); font-weight: 500; text-underline-offset: 5px; text-decoration-color: var(--line-strong); }
.btn-text:hover { text-decoration-color: var(--red); }

/* ---- hero ---- */
.hero {
  max-width: 1240px; margin: 0 auto; padding: 56px 24px 72px;
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 40px; align-items: center;
}
.kicker { display: flex; align-items: center; gap: 12px; font: 500 13px var(--f-mono); text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin: 0 0 26px; }
.kicker-rule { width: 40px; height: 1.5px; background: var(--red); }
.hero h1 { font: 400 clamp(46px, 7.4vw, 104px)/.95 var(--f-display); letter-spacing: -.025em; margin: 0 0 28px; }
.hero h1 em { color: var(--green); }
.lede { font-size: 19px; line-height: 1.55; max-width: 540px; margin: 0 0 34px; color: color-mix(in srgb, var(--ink) 82%, var(--paper)); }
.hero-actions { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }

.hero-visual { margin: 0; position: relative; height: 440px; }
.hero-visual figcaption { position: absolute; left: 0; right: 0; bottom: -10px; font-size: 13px; color: var(--muted); max-width: 320px; margin-left: auto; text-align: right; }

.bond {
  position: absolute; width: 430px; height: 256px; right: 0; top: 60px;
  border-radius: 6px; background: var(--surface);
  border: 1px solid var(--line-strong);
  transition: transform .5s var(--ease);
}
.bond-back { transform: rotate(9deg) translate(26px, -34px); background: var(--paper-2); }
.bond-mid { transform: rotate(4deg) translate(12px, -16px); }
.hero-visual:hover .bond-back { transform: rotate(13deg) translate(44px, -56px); }
.hero-visual:hover .bond-mid { transform: rotate(6deg) translate(22px, -28px); }
.bond-front {
  transform: rotate(-4deg);
  box-shadow: 0 1px 0 var(--line-strong), 10px 14px 0 -2px color-mix(in srgb, var(--ink) 10%, transparent);
  padding: 18px 20px; overflow: hidden;
  background-image: repeating-linear-gradient(135deg, transparent 0 6px, color-mix(in srgb, var(--green) 5%, transparent) 6px 7px);
}
.bond-front::before { content: ""; position: absolute; inset: 7px; border: 1.5px double var(--green); border-radius: 3px; pointer-events: none; outline: 1px solid color-mix(in srgb, var(--green) 35%, transparent); outline-offset: 3px; }
.hero-visual:hover .bond-front { transform: rotate(-2deg) translateY(-4px); }
.bond-top { position: relative; display: flex; justify-content: space-between; align-items: baseline; font: 600 11px var(--f-mono); text-transform: uppercase; letter-spacing: .16em; color: var(--green); padding: 4px 6px 0; }
.bond-value { font: 400 34px/1 var(--f-display); letter-spacing: 0; }
.rosette { position: absolute; width: 190px; height: 190px; left: -38px; bottom: -58px; color: var(--green); opacity: .22; }
.rosette ellipse { fill: none; stroke: currentColor; stroke-width: .6; }
.bond-serial { position: absolute; right: 26px; bottom: 54px; text-align: right; display: flex; align-items: baseline; gap: 12px; }
.bond-series { font-size: 26px; color: var(--red); }
.bond-num { font: 600 34px/1 var(--f-mono); letter-spacing: .1em; color: var(--ink); }
.bond-foot { position: absolute; left: 26px; right: 26px; bottom: 22px; display: flex; justify-content: space-between; font: 500 11px var(--f-mono); text-transform: uppercase; letter-spacing: .12em; color: var(--muted); border-top: 1px dashed var(--line-strong); padding-top: 8px; }
.stamp {
  position: absolute; left: 36px; top: 66px;
  border: 2.5px solid var(--red); color: var(--red); border-radius: 6px;
  padding: 8px 12px; text-align: center; transform: rotate(-12deg);
  display: flex; flex-direction: column; gap: 3px; font-family: var(--f-mono);
  background: color-mix(in srgb, var(--surface) 55%, transparent);
  opacity: .9; z-index: 2;
  animation: heroStamp .6s .5s var(--ease) both;
}
.stamp-top, .stamp-bot { font-size: 10px; text-transform: uppercase; letter-spacing: .18em; font-weight: 600; }
.stamp-amt { font: 400 24px/1 var(--f-display); letter-spacing: 0; border-top: 1px solid; border-bottom: 1px solid; padding: 4px 0; }
@keyframes heroStamp { from { transform: rotate(-12deg) scale(2.2); opacity: 0; } 60% { opacity: .9; } to { transform: rotate(-12deg) scale(1); opacity: .9; } }
@media (prefers-reduced-motion: reduce) { .stamp { animation: none; } .bond { transition: none; } }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; padding-top: 32px; gap: 20px; }
  .hero-visual { height: 360px; max-width: 460px; width: 100%; margin: 0 auto; }
  .bond { right: 50%; margin-right: -215px; top: 50px; }
}
@media (max-width: 480px) {
  .hero-visual { height: 300px; }
  .bond { width: 300px; height: 190px; margin-right: -150px; }
  .bond-num { font-size: 26px; }
  .bond-value { font-size: 26px; }
  .stamp { left: 22px; top: 44px; padding: 6px 9px; }
  .stamp-amt { font-size: 19px; }
  .bond-serial { bottom: 50px; right: 20px; }
  .hero-visual figcaption { text-align: left; }
}

/* ---- fact strip ---- */
.ledger-strip {
  max-width: 1240px; margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1.4fr 1fr 1fr;
  border-top: 1.5px solid var(--ink); border-bottom: 1px solid var(--line-strong);
}
.ls-item { padding: 26px 24px 26px 0; display: flex; gap: 16px; align-items: baseline; }
.ls-item + .ls-item { border-left: 1px solid var(--line-strong); padding-left: 24px; }
.ls-num { font: 400 64px/1 var(--f-display); color: var(--green); }
.ls-big .ls-num { font-size: 88px; color: var(--red); }
.ls-label { font-size: 15px; color: var(--muted); max-width: 220px; }
@media (max-width: 820px) {
  .ledger-strip { grid-template-columns: 1fr; }
  .ls-item + .ls-item { border-left: none; padding-left: 0; border-top: 1px solid var(--line); }
  .ls-num, .ls-big .ls-num { font-size: 56px; min-width: 80px; }
}

/* ---- intro ---- */
.intro { max-width: 1240px; margin: 0 auto; padding: 110px 24px 90px; display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: 60px; align-items: start; }
.intro-head { font: 400 clamp(32px, 4.4vw, 52px)/1.05 var(--f-display) !important; }
.intro-body { padding-top: 10px; column-gap: 32px; }
.intro-body p { font-size: 18px; margin: 0 0 18px; }
.intro-body p:first-child::first-letter { font: 400 64px/.8 var(--f-display); float: left; margin: 6px 10px 0 0; color: var(--red); }
@media (max-width: 860px) { .intro { grid-template-columns: 1fr; gap: 24px; padding: 72px 24px 56px; } }

/* ---- how ---- */
.how { max-width: 1240px; margin: 0 auto; padding: 40px 24px 110px; }
.steps { list-style: none; margin: 0; padding: 0; }
.step-item { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 32px; padding: 30px 0; border-top: 1px solid var(--line-strong); align-items: start; }
.step-item:nth-child(2) { margin-left: 12%; }
.step-item:nth-child(3) { margin-left: 24%; }
.step-no { font: 400 96px/.8 var(--f-display); color: transparent; -webkit-text-stroke: 1.2px var(--green); }
.step-item h3 { font: 600 24px/1.2 var(--f-body); margin: 4px 0 8px; letter-spacing: -.01em; }
.step-item p { margin: 0; max-width: 560px; color: var(--muted); font-size: 17px; }
.step-item:hover .step-no { color: var(--green); transition: color .3s; }
@media (max-width: 760px) {
  .step-item, .step-item:nth-child(2), .step-item:nth-child(3) { margin-left: 0; grid-template-columns: 1fr; gap: 10px; }
  .step-no { font-size: 64px; }
}

/* ---- checker ---- */
.checker { background: var(--green); color: var(--on-green); padding: 100px 24px 110px; position: relative; }
.checker::before { /* perforation edge */
  content: ""; position: absolute; left: 0; right: 0; top: -9px; height: 18px;
  background: radial-gradient(circle at 9px 9px, var(--paper) 0 5px, transparent 5.5px) 0 0 / 22px 18px repeat-x;
}
.checker-head { max-width: 1080px; margin: 0 auto 44px; display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.checker-head .section-label { color: var(--on-green); opacity: .8; width: 100%; margin-bottom: 0; }
.checker-head h2 em { color: inherit; opacity: .75; }
.sheet { max-width: 1080px; margin: 0 auto; color: var(--ink); }
.sheet .card { padding: 32px; box-shadow: 8px 8px 0 color-mix(in srgb, var(--ink) 35%, transparent); }
@media (max-width: 600px) { .sheet .card { padding: 20px; } .checker { padding: 72px 16px 80px; } }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .checker { background: #0c2a1f; color: var(--ink); }
  :root:not([data-theme="light"]) .checker-head .section-label { color: var(--green); }
}
:root[data-theme="dark"] .checker { background: #0c2a1f; color: var(--ink); }

/* ---- draws ---- */
.draws { max-width: 1240px; margin: 0 auto; padding: 120px 24px 100px; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 64px; align-items: start; }
.draws-side { position: sticky; top: 100px; }
.draws-side p { font-size: 17px; color: var(--muted); margin: 22px 0 28px; max-width: 440px; }
.prize-table { border-top: 1.5px solid var(--ink); max-width: 420px; }
.prize-table th { position: static; background: none; padding-left: 0; }
.prize-table td { padding-left: 0; font-family: var(--f-mono); font-size: 14px; }
.prize-table tbody tr:hover td { background: none; }
.draws-list details.draw:first-child { border-color: var(--line-strong); }
@media (max-width: 900px) { .draws { grid-template-columns: 1fr; gap: 36px; padding: 80px 24px 70px; } .draws-side { position: static; } }

/* ---- use cases ---- */
.uses { max-width: 1240px; margin: 0 auto; padding: 60px 24px 110px; }
.uses-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 0; }
.use { padding: 30px 30px 34px; border: 1px solid var(--line-strong); background: var(--surface); position: relative; }
.use-a { grid-column: 1 / span 6; grid-row: 1; }
.use-b { grid-column: 6 / span 5; grid-row: 2; margin-top: -36px; z-index: 2; background: var(--paper-2); }
.use-c { grid-column: 9 / span 4; grid-row: 1 / span 2; align-self: end; margin-left: 24px; }
.use-tag { font: 600 11px var(--f-mono); text-transform: uppercase; letter-spacing: .14em; color: var(--red); }
.use h3 { font: 400 28px/1.12 var(--f-display); margin: 12px 0 10px; }
.use p { margin: 0; color: var(--muted); }
.use { transition: transform .3s var(--ease); }
.use:hover { transform: translateY(-3px); }
@media (max-width: 900px) {
  .uses-grid { grid-template-columns: 1fr; gap: 14px; }
  .use-a, .use-b, .use-c { grid-column: auto; grid-row: auto; margin: 0; }
  .use-b { margin-left: 24px; }
}

/* ---- rules ---- */
.rules { max-width: 1240px; margin: 0 auto; padding: 0 24px 110px; }
.rules-body { border-top: 1.5px solid var(--ink); }
.rule { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 24px; margin: 0; padding: 20px 0; border-bottom: 1px solid var(--line); font-size: 17px; max-width: 900px; }
.rule-k { font: 400 26px/1.1 var(--f-display); color: var(--green); }
@media (max-width: 640px) { .rule { grid-template-columns: 1fr; gap: 4px; } }

/* ---- faq ---- */
.faq { max-width: 1240px; margin: 0 auto; padding: 40px 24px 120px; display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 64px; }
.faq-list details { border-bottom: 1px solid var(--line-strong); }
.faq-list details:first-child { border-top: 1.5px solid var(--ink); }
.faq-list summary { cursor: pointer; list-style: none; padding: 22px 40px 22px 0; font: 500 19px/1.35 var(--f-body); position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font: 400 28px var(--f-display); color: var(--red); transition: transform .25s var(--ease); }
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list summary:hover { color: var(--green); }
.faq-list p { margin: 0 0 22px; color: var(--muted); max-width: 620px; font-size: 17px; }
@media (max-width: 860px) { .faq { grid-template-columns: 1fr; gap: 28px; padding-bottom: 80px; } }

/* ---- final ---- */
.final { background: var(--ink); color: var(--paper); text-align: left; padding: 110px max(24px, calc((100vw - 1192px) / 2)) 120px; position: relative; overflow: hidden; }
.final::after { content: "৳"; position: absolute; right: -2vw; bottom: -14vw; font: 400 42vw/1 var(--f-display); color: color-mix(in srgb, var(--paper) 6%, transparent); pointer-events: none; }
.final-k { font: 500 13px var(--f-mono); text-transform: uppercase; letter-spacing: .14em; color: var(--brass); margin: 0 0 22px; }
.final h2 { font-size: clamp(40px, 6.4vw, 84px) !important; margin-bottom: 40px !important; max-width: 900px; position: relative; z-index: 1; }
.final h2 em { color: var(--brass) !important; }
.btn-light { background: var(--paper); color: var(--ink); position: relative; z-index: 1; box-shadow: 4px 4px 0 var(--red); }
.btn-light:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--red); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .final { background: #0a0e0b; color: var(--ink); } }
:root[data-theme="dark"] .final { background: #0a0e0b; color: var(--ink); }

/* ---- footer ---- */
.site-foot { border-top: 1px solid var(--line-strong); }
.foot-inner { max-width: 1240px; margin: 0 auto; padding: 36px 24px 44px; display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.foot-inner p { color: var(--muted); font-size: 14px; max-width: 420px; margin: 12px 0 0; }
.foot-links { display: flex; gap: 22px; flex-wrap: wrap; align-items: flex-start; }
.foot-links a { color: var(--ink); text-decoration: none; font-size: 15px; }
.foot-links a:hover { color: var(--red); }

/* ---- reveal on scroll ---- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } }

/* ================= Admin form ================= */
.admin-user { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; font-size: 14px; color: var(--muted); }
.prize-form { margin-top: 22px; border-top: 1.5px solid var(--ink); }
.pf-row { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); align-items: start; }
.pf-label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.pf-label b { color: var(--ink); font-size: 16px; }
.pf-label label { display: flex; align-items: center; gap: 6px; font-size: 13px; }
.pf-label .amt { width: 110px; padding: 5px 8px; font-family: var(--f-mono); font-size: 13px; }
.pf-inputs { display: flex; gap: 10px; flex-wrap: wrap; }
.pf-wide .pf-inputs { display: block; }
@media (max-width: 640px) { .pf-row { grid-template-columns: 1fr; gap: 8px; } }