/* Landing page and sign-in page: the two pages a visitor sees before the study app.
   Colours, fonts and radii come from tokens.css so these pages and the app are one product. */

:root { --on-accent: #FFFFFF; --page-max: 1120px; }
:root[data-theme="dark"] { --on-accent: #06211B; } /* white on the dark-theme mint is 2.2:1; this is 9:1 */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; background: var(--bg); color: var(--text);
  font: 16px/1.6 var(--font-sans); -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-text); text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--accent-line); outline-offset: 2px; border-radius: 6px; }
.wrap { width: 100%; max-width: var(--page-max); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 10; background: var(--surface); padding: 8px 12px; }

/* ---- buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 22px;
  border-radius: 12px; border: 1px solid transparent; font: 600 16px/1 var(--font-sans); text-decoration: none;
  cursor: pointer; transition: background .15s ease, transform .15s ease, border-color .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-2); }
:root[data-theme="dark"] .btn-primary:hover { background: #2fd3b0; }
.btn-quiet { background: transparent; color: var(--text); border-color: var(--border-2); }
.btn-quiet:hover { background: var(--surface-3); }
.btn-small { min-height: 40px; padding: 0 16px; font-size: 15px; }
.btn[disabled] { opacity: .6; cursor: progress; }

/* ---- header ---- */
.top { position: sticky; top: 0; z-index: 5; background: var(--glass-bg); backdrop-filter: blur(10px);
       border-bottom: 1px solid var(--border); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700;
         letter-spacing: -.01em; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
              background: var(--accent); color: var(--on-accent); font: 800 17px/1 var(--font-sans); }
.brand small { display: block; font-weight: 500; font-size: 12px; color: var(--text-3); }

/* ---- hero ---- */
.hero { padding: 56px 0 40px; }
@media (min-width: 900px) { .hero { padding: 96px 0 64px; } }
.eyebrow { margin: 0 0 16px; color: var(--accent-text); font-size: 13px; font-weight: 700; letter-spacing: .1em;
           text-transform: uppercase; }
.hero h1 { margin: 0; max-width: 17ch; text-wrap: balance; font: 600 clamp(38px, 7vw, 68px)/1.04 var(--font-serif); letter-spacing: -.025em; }
.hero h1 em { font-style: normal; color: var(--accent-text); }
.lede { max-width: 56ch; margin: 22px 0 32px; color: var(--text-2); font-size: clamp(17px, 2.2vw, 20px); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.cta-note { margin: 14px 0 0; color: var(--text-3); font-size: 14px; }

/* ---- numbers ---- */
.stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; margin: 8px 0 0;
         background: var(--border); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; }
@media (min-width: 760px) { .stats { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.stat { background: var(--surface); padding: 20px; }
.stat b { display: block; font: 600 clamp(26px, 4vw, 34px)/1.1 var(--font-sans); font-variant-numeric: tabular-nums;
          letter-spacing: -.02em; }
.stat span { color: var(--text-2); font-size: 14px; }

/* ---- sections ---- */
section.block { padding: 56px 0; }
section.block h2 { margin: 0 0 8px; font: 600 clamp(28px, 4vw, 38px)/1.15 var(--font-serif); letter-spacing: -.02em; }
.section-lede { margin: 0 0 28px; color: var(--text-2); max-width: 60ch; }
.features { display: grid; gap: 14px; grid-template-columns: 1fr; }
@media (min-width: 700px) { .features { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 22px; }
.feature h3 { display: flex; align-items: center; gap: 10px; margin: 0 0 8px; font-size: 18px; }
.feature p { margin: 0; color: var(--text-2); font-size: 15px; }
.icon { display: grid; place-items: center; width: 36px; height: 36px; flex: none; border-radius: 10px;
        background: var(--accent-soft); color: var(--accent-text); }
.icon svg { width: 20px; height: 20px; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; counter-reset: step; }
@media (min-width: 760px) { .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.steps li { counter-increment: step; padding: 22px; border-radius: 16px; border: 1px dashed var(--border-2); }
.steps li::before { content: counter(step); display: grid; place-items: center; width: 32px; height: 32px;
                    margin-bottom: 12px; border-radius: 50%; background: var(--text); color: var(--bg); font-weight: 700; }
.steps h3 { margin: 0 0 6px; font-size: 17px; }
.steps p { margin: 0; color: var(--text-2); font-size: 15px; }

.closing { margin: 24px 0 64px; padding: 36px 24px; border-radius: 20px; text-align: center;
           background: var(--surface); border: 1px solid var(--border); }
.closing h2 { margin: 0 0 10px; font: 600 clamp(26px, 4vw, 34px)/1.15 var(--font-serif); }
.closing p { margin: 0 auto 22px; max-width: 48ch; color: var(--text-2); }
footer { padding: 24px 0 40px; color: var(--text-3); font-size: 14px; border-top: 1px solid var(--border); }

/* ---- sign-in ---- */
.auth-page { display: grid; place-items: center; min-height: calc(100vh - 64px); padding: 32px 16px 56px; }
.auth-card { width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--border);
             border-radius: 20px; padding: 28px 22px; box-shadow: 0 12px 40px rgba(0, 0, 0, .06); }
@media (min-width: 480px) { .auth-card { padding: 34px 32px; } }
.auth-card h1 { margin: 0 0 6px; font: 600 30px/1.15 var(--font-serif); letter-spacing: -.02em; }
.auth-card .sub { margin: 0 0 22px; color: var(--text-2); font-size: 15px; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; margin: 0 0 22px;
        background: var(--surface-3); border-radius: 12px; }
.tabs button { min-height: 40px; border: 0; border-radius: 9px; background: transparent; color: var(--text-2);
               font: 600 15px var(--font-sans); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.field { display: block; margin: 0 0 16px; }
.field span { display: block; margin: 0 0 6px; font-size: 14px; font-weight: 600; }
.field small { display: block; margin-top: 6px; color: var(--text-3); font-size: 13px; }
.field input {
  width: 100%; min-height: 48px; padding: 0 14px; border-radius: 12px; border: 1px solid var(--border-2);
  background: var(--surface-2); color: var(--text); font: 16px var(--font-sans); /* 16px: no iOS zoom on focus */
}
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.alert { margin: 0 0 16px; padding: 12px 14px; border-radius: 12px; font-size: 14px;
         background: var(--danger-soft); color: var(--danger-text); border: 1px solid var(--danger-line); }
.alert[hidden] { display: none; }
.auth-card .btn-primary { width: 100%; }
.auth-foot { margin: 18px 0 0; text-align: center; color: var(--text-3); font-size: 14px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
.top-nav { display: flex; align-items: center; gap: 8px; }
.top-nav a:not(.btn) { padding: 8px 10px; color: var(--text-2); text-decoration: none; font-weight: 600; font-size: 15px; }
.top-nav a:not(.btn):hover { color: var(--text); }

/* exam track picker (sign-up) */
.track-pick { margin: 0 0 16px; padding: 0; border: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.track-pick legend { margin: 0 0 6px; padding: 0; font-size: 14px; font-weight: 600; }
.track-pick > small { grid-column: 1 / -1; margin-top: 2px; color: var(--text-3); font-size: 13px; }
.track-option { position: relative; display: block; cursor: pointer; }
.track-option input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.track-option span { display: flex; flex-direction: column; gap: 2px; min-height: 64px; justify-content: center; padding: 10px 12px;
  border: 1px solid var(--border-2); border-radius: 12px; background: var(--surface); transition: border-color .15s, box-shadow .15s; }
.track-option b { font-size: 15px; }
.track-option small { color: var(--text-3); font-size: 12.5px; font-weight: 600; letter-spacing: .03em; }
.track-option input:checked + span { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); background: var(--accent-soft); }
.track-option input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (max-width: 380px) { .track-pick { grid-template-columns: 1fr; } .track-option span { min-height: 48px; } }
.exam-tracks { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.exam-track { display: flex; flex-direction: column; gap: 4px; padding: 20px; border: 1px solid var(--border); border-radius: 16px; background: var(--surface); color: var(--text); text-decoration: none; }
.exam-track:hover { border-color: var(--accent-line); }
.exam-track b { font-size: 18px; }
.exam-track span { color: var(--text-2); font-size: 14px; }
.auth-track { display: inline-flex; align-items: center; gap: 7px; margin: 0 0 12px; padding: 5px 12px 5px 9px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent-text); font-size: 13.5px; font-weight: 700; }
.auth-track[hidden] { display: none; }
.auth-card { border-top: 3px solid var(--accent); }
/* landing: each exam card in its own colour */
.exam-track[data-track="nursing"] { --accent: #1F5FAE; --accent-line: rgba(31, 95, 174, .4); }
.exam-track[data-track="dentistry"] { --accent: #6B46A8; --accent-line: rgba(107, 70, 168, .4); }
.exam-track { border-top: 3px solid var(--accent); }
.exam-track b { color: var(--accent); }