/* VetriPath Placement: own look (teal with VetriPath gold), light and dark. Mobile first. */
:root {
  --bg: #f6faf9;
  --surface: #ffffff;
  --ink: #0d1f1e;
  --muted: #4b5d5b;
  --line: #d5e3e0;
  --brand: #0b5f5a;
  --brand-ink: #ffffff;
  --brand-deep: #0b3b3a;
  --gold: #d4a72c;
  --good: #11743a;
  --good-bg: #e6f5ec;
  --bad: #b42318;
  --bad-bg: #fdecea;
  --focus: #1d7fd6;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(13 31 30 / 0.06), 0 4px 16px rgb(13 31 30 / 0.05);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1514;
    --surface: #12201f;
    --ink: #e7f1ef;
    --muted: #a3b7b4;
    --line: #26403d;
    --brand: #2fb3a8;
    --brand-ink: #062322;
    --brand-deep: #06100f;
    --good: #5fd08d;
    --good-bg: #10301e;
    --bad: #ff8a80;
    --bad-bg: #3a1714;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 "Noto Sans", "Noto Sans Tamil", system-ui, sans-serif;
}
[lang="ta"] { font-family: "Noto Sans Tamil", "Noto Sans", system-ui, sans-serif; }
a { color: var(--brand); }
img { max-width: 100%; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 0.5em; }
h1 { font-size: clamp(1.6rem, 5vw, 2.4rem); }
h2 { font-size: 1.35rem; margin-top: 1.5em; }
h3 { font-size: 1.05rem; margin-top: 1.25em; color: var(--muted); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; z-index: 10; background: var(--surface); padding: 8px 12px; border-radius: 8px; }

/* header */
.top { background: var(--surface); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 64px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand b { display: block; font-size: 1.05rem; }
.brand em { font-style: normal; color: var(--brand); }
.brand small { display: block; color: var(--muted); font-size: 0.75rem; }
nav { display: flex; gap: 6px 16px; flex-wrap: wrap; font-weight: 600; font-size: 0.95rem; }
nav a { text-decoration: none; color: var(--ink); padding: 6px 0; }
nav a:hover { color: var(--brand); }
.nav-main { color: var(--muted) !important; font-weight: 400; }

/* hero */
.hero { background: linear-gradient(135deg, #0b3b3a, #0b5f5a 60%, #13706a); color: #fff; padding: 40px 0 44px; }
.hero .kicker { display: inline-block; margin: 0 0 12px; padding: 4px 12px; border-radius: 99px; background: rgb(255 255 255 / 0.12); color: #f4d27a; font-size: 0.85rem; font-weight: 600; }
.hero h1 { color: #fff; }
.hero .lead { font-size: 1.1rem; max-width: 46rem; margin: 0.5em 0 0.25em; }
.hero .lead-en { color: #cfe7e3; max-width: 46rem; margin: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }

/* buttons */
.btn { display: inline-flex; flex-wrap: wrap; gap: 0 0.35em; align-items: center; justify-content: center; min-height: 46px; padding: 10px 18px; border-radius: 10px; font-weight: 700; text-decoration: none; border: 2px solid transparent; cursor: pointer; font-size: 1rem; text-align: center; }
.btn-main { background: var(--gold); color: #1b1503; }
.btn-main:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; color: inherit; border-color: currentColor; }
.hero .btn-ghost { color: #fff; }
.btn-share { background: #128c4a; color: #fff; }
.more .btn { margin: 4px 8px 4px 0; }

/* sections */
.how .steps { padding-left: 1.2em; }
.how li { margin: 6px 0; }
.grid { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 210px), 1fr)); }
.card { display: flex; flex-direction: column; height: 100%; padding: 14px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); text-decoration: none; color: var(--ink); }
.card:hover { border-color: var(--brand); }
.topic .ta { font-weight: 700; font-size: 1.05rem; }
.topic .en { color: var(--brand); font-weight: 600; font-size: 0.95rem; }
.topic .meta { color: var(--muted); font-size: 0.8rem; margin-top: 6px; }
.more { margin-bottom: 32px; }

/* quiz */
.quiz-head { padding-top: 24px; }
.crumb { font-size: 0.9rem; color: var(--muted); margin: 0 0 8px; }
.sub { color: var(--muted); }
.streak { display: inline-block; padding: 6px 12px; border-radius: 99px; background: var(--good-bg); color: var(--good); font-weight: 700; }
.loading, .note { padding: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.qs { list-style: none; padding: 0; margin: 0; }
.q { margin: 0 0 14px; padding: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); min-width: 0; }
.q legend { padding: 0; float: left; width: 100%; } /* float keeps the legend inside the card */
.q legend + * { clear: both; }
.q .qt { display: block; font-weight: 600; font-size: 1.05rem; }
.q .qe { display: block; color: var(--muted); margin-top: 2px; }
.static .qt, .static .qe { margin: 0; }
.static .opts { padding-left: 1.2em; color: var(--muted); }
.opts { display: grid; gap: 8px; margin-top: 12px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .opts { grid-template-columns: 1fr 1fr; } }
.opt { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; min-height: 46px; overflow-wrap: anywhere; }
.opt:has(input:checked) { border-color: var(--brand); background: color-mix(in srgb, var(--brand) 8%, transparent); }
.opt input { margin-top: 4px; accent-color: var(--brand); }
.q .opt.is-correct { border-color: var(--good); background: var(--good-bg); }
.q .opt.is-chosen { border-color: var(--bad); background: var(--bad-bg); }
.q.right { border-left: 5px solid var(--good); }
.q.wrong { border-left: 5px solid var(--bad); }
.ex { margin-top: 12px; padding: 10px 12px; border-radius: 10px; background: var(--bg); }
.ex p { margin: 4px 0; }
.ex .verdict { font-weight: 700; }
.q.right .verdict { color: var(--good); }
.q.wrong .verdict { color: var(--bad); }
.submit { margin: 8px 0 32px; }
.summary .score { font-size: 1.4rem; font-weight: 700; margin: 8px 0; }
.summary .actions { margin-top: 8px; }

/* footer */
.foot { margin-top: 40px; padding: 24px 0 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
.foot b { color: var(--ink); }