@font-face {
  font-family: "NairaSign";
  src: url("/fonts/naira-bold.ttf") format("truetype");
  unicode-range: U+20A6;
  font-weight: 100 900;
  font-display: swap;
}
:root {
  --green: #0b6b3a;
  --green-dark: #084e2b;
  --green-soft: #e8f6ee;
  --gold: #c9a227;
  --ink: #14201a;
  --muted: #5b6b62;
  --line: #d7e3db;
  --bg: #f4f7f5;
  --card: #fff;
  --danger: #b42318;
  --warn: #b54708;
  --ok: #067647;
  --shadow: 0 8px 24px rgba(11, 40, 24, 0.08);
  --radius: 16px;
  --font: "NairaSign", "Source Sans 3", "Noto Sans", "DejaVu Sans", "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.45;
  min-height: 100vh;
}
a { color: var(--green); }
.wrap { width: min(860px, calc(100% - 28px)); margin: 0 auto; }
header.app {
  background: var(--green-dark);
  color: #fff;
  padding: 12px 0;
}
header.app .head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; min-width: 0; }
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-name { font-weight: 800; font-size: 1.05rem; letter-spacing: -0.02em; line-height: 1.15; }
.brand-tagline { font-size: 0.72rem; font-weight: 600; color: #d7efe2; letter-spacing: 0.01em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.logo {
  width: 36px; height: 36px; border-radius: 10px; flex-shrink: 0;
  background: linear-gradient(145deg, #14a15a, #0b6b3a);
  display: grid; place-items: center;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.2);
}
.logo svg { width: 22px; height: 22px; }
nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px 0; }
nav a { color: #d7efe2; text-decoration: none; font-weight: 600; font-size: 0.88rem; margin-left: 12px; }
nav a:hover { color: #fff; }
.hero { padding: 28px 0 8px; }
.hero h1 { font-size: 1.75rem; line-height: 1.2; margin: 0 0 8px; letter-spacing: -0.03em; }
.hero .tagline { color: var(--green-dark); font-weight: 800; margin: 0 0 8px; }
.hero p { margin: 0; color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin: 16px 0;
}
label { display: block; font-weight: 650; font-size: 0.92rem; margin: 14px 0 6px; }
input, select, textarea {
  width: 100%; font: inherit; padding: 12px 14px; border-radius: 12px;
  border: 1.5px solid var(--line); background: #fff; color: var(--ink);
}
textarea { min-height: 88px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--green); outline-offset: 1px; border-color: var(--green); }
.hint { color: var(--muted); font-size: 0.85rem; margin-top: 6px; }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--green-soft); color: var(--green-dark);
  border-radius: 999px; padding: 4px 10px; font-size: 0.8rem; font-weight: 700;
}
.badge.warn { background: #fff4e5; color: var(--warn); }
.badge.danger { background: #fdecea; color: var(--danger); }
.btn {
  display: inline-flex; justify-content: center; align-items: center;
  background: var(--green); color: #fff; border: 0; border-radius: 14px;
  padding: 14px 16px; font: inherit; font-weight: 800; font-size: 1.05rem;
  cursor: pointer; margin-top: 14px; text-decoration: none; width: 100%;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn.secondary { background: #fff; color: var(--green-dark); border: 1.5px solid var(--line); }
.btn.danger { background: var(--danger); }
.btn.small { width: auto; padding: 8px 12px; font-size: 0.9rem; margin-top: 0; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.btn-row .btn { width: auto; flex: 1; margin-top: 0; }
.error { background: #fdecea; color: var(--danger); border-radius: 12px; padding: 10px 12px; margin: 10px 0; font-weight: 600; font-size: 0.92rem; }
.okmsg { background: var(--green-soft); color: var(--ok); border-radius: 12px; padding: 10px 12px; margin: 10px 0; font-weight: 600; }
.warnbox { background: #fff4e5; color: var(--warn); border-radius: 12px; padding: 10px 12px; margin: 10px 0; font-weight: 600; }
.trust { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; margin: 8px 0 20px; text-align: center; }
.trust div { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 12px 8px; font-size: 0.82rem; color: var(--muted); }
.trust b { display: block; color: var(--ink); font-size: 0.9rem; margin-bottom: 2px; }
footer { padding: 8px 0 36px; color: var(--muted); font-size: 0.85rem; text-align: center; }
.hidden { display: none !important; }
.grid { display: grid; gap: 10px; }
.grid.two { grid-template-columns: 1fr; }
.choice-grid, .subject-grid { display: grid; gap: 8px; }
.choice, .subject-card, .plan-card {
  display: block; border: 1.5px solid var(--line); border-radius: 12px;
  padding: 12px 14px; background: #fff; cursor: pointer; text-align: left; font: inherit; color: inherit; text-decoration: none;
}
.choice:hover, .subject-card:hover, .plan-card:hover { border-color: var(--green); }
.choice.active, .subject-card.active, .plan-card.featured {
  border-color: var(--green); background: var(--green-soft);
}
.plan-card h3 { margin: 0 0 4px; }
.plan-card .price { font-weight: 800; font-size: 1.35rem; color: var(--green-dark); }
.plan-card ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); }
.choice b { margin-right: 8px; color: var(--green-dark); }
.timer {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  background: var(--green-dark); color: #fff; border-radius: 12px; padding: 10px 14px; font-weight: 700;
}
.timer.low { background: var(--danger); }
.nav-grid { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0; }
.nav-grid button {
  width: 36px; height: 36px; border-radius: 10px; border: 1.5px solid var(--line);
  background: #fff; font: inherit; font-weight: 700; cursor: pointer;
}
.nav-grid button.current { background: var(--green); color: #fff; border-color: var(--green); }
.nav-grid button.answered { background: var(--green-soft); border-color: var(--green); }
.result-item { border: 1.5px solid var(--line); border-radius: 12px; padding: 12px 14px; margin: 10px 0; }
.result-item.correct { border-color: #abefc6; background: #f6fef9; }
.result-item.wrong { border-color: #f5c2c0; background: #fff8f7; }
.result-item .meta { font-size: 0.82rem; color: var(--muted); margin-bottom: 6px; font-weight: 700; }
.score-hero { text-align: center; padding: 8px 0 4px; }
.score-hero .big { font-size: 2.4rem; font-weight: 800; color: var(--green-dark); letter-spacing: -0.04em; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 700; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; }
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.stat { background: var(--green-soft); border-radius: 12px; padding: 12px; }
.stat b { display: block; font-size: 1.2rem; }
.stat span { color: var(--muted); font-size: 0.8rem; }
.note-body { white-space: pre-wrap; }
.muted { color: var(--muted); }
h2 { margin: 8px 0 6px; font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
@media (min-width: 640px) {
  .grid.two, .subject-grid, .plan-grid { grid-template-columns: 1fr 1fr; }
  .plan-grid { display: grid; gap: 10px; }
  .hero h1 { font-size: 2.1rem; }
  .stats { grid-template-columns: repeat(4, 1fr); }
  .brand-name { font-size: 1.15rem; }
  .brand-tagline { font-size: 0.8rem; }
}
@media (max-width: 520px) {
  nav a { margin-left: 8px; font-size: 0.8rem; }
  .trust { grid-template-columns: 1fr; }
}