:root {
  --bg: #f3efe6;
  --bg-2: #e7eef0;
  --ink: #122033;
  --muted: #334556;
  --card: #fffdf8;
  --line: #e4dac8;
  --navy: #102033;
  --navy-2: #1a3148;
  --teal: #0e6f6c;
  --teal-2: #0a5553;
  --gold: #b8893e;
  --gold-soft: #f4e4c4;
  --ok: #1b7a4a;
  --ok-bg: #e7f6ee;
  --bad: #b42318;
  --bad-bg: #fdecea;
  --warn: #9a6700;
  --warn-bg: #fff6dd;
  --chip: #e8eef1;
  --shadow: 0 12px 40px rgba(16,32,51,.08);
  --radius: 16px;
  --safe-b: env(safe-area-inset-bottom);
}
[data-theme="dark"] {
  --bg: #0d1622;
  --bg-2: #122033;
  --ink: #e8eef3;
  --muted: #c8d6e4;
  --card: #162433;
  --line: #2a3c50;
  --navy: #0b1520;
  --navy-2: #163047;
  --chip: #1e3042;
  --shadow: 0 12px 40px rgba(0,0,0,.35);
  --gold-soft: #3a2e18;
  --ok-bg: #163226;
  --bad-bg: #3a1c1a;
  --warn-bg: #3a3014;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Source Sans 3", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(14,111,108,.04), transparent 28%),
    radial-gradient(900px 420px at 0% -10%, rgba(14,111,108,.14), transparent 50%),
    radial-gradient(700px 380px at 100% 0%, rgba(16,32,51,.08), transparent 46%),
    repeating-linear-gradient(90deg, transparent 0 31px, rgba(16,32,51,.03) 31px 32px),
    var(--bg);
}
h1,h2,h3,h4,.serif { font-family: Fraunces, Georgia, serif; font-weight: 650; letter-spacing: -.02em; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--teal); }
.app-shell { display: flex; min-height: 100dvh; }
.sidebar {
  width: 268px; background:
    linear-gradient(180deg, #0c1c2c 0%, #102033 42%, #0a3340 100%);
  color: #e8eef3;
  padding: 18px 14px 24px; display: flex; flex-direction: column; gap: 16px;
  position: sticky; top: 0; height: 100dvh; z-index: 20;
  border-right: 1px solid rgba(255,255,255,.06);
}
.brand { display: flex; gap: 10px; align-items: center; padding: 6px 8px 10px; }
.mark {
  width: 38px; height: 38px; border-radius: 12px; background: linear-gradient(145deg, #15928e, #0a5553);
  display: grid; place-items: center; color: #fff;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.18);
}
.med-cross {
  width: 14px; height: 14px; background: #fff; position: relative; display: block;
  clip-path: polygon(35% 0, 65% 0, 65% 35%, 100% 35%, 100% 65%, 65% 65%, 65% 100%, 35% 100%, 35% 65%, 0 65%, 0 35%, 35% 35%);
}
.brand-name { font-weight: 700; letter-spacing: .08em; font-size: 13px; }
.brand-sub { font-size: 11px; color: #9bb0c3; }
.nav { display: flex; flex-direction: column; gap: 2px; overflow: auto; }
.nav-label { font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: #7f93a8; padding: 10px 10px 4px; }
.nav-btn {
  background: transparent; border: 0; color: #d7e2ec; text-align: left;
  padding: 9px 10px; border-radius: 10px; cursor: pointer;
}
.nav-btn:hover, .nav-btn.active { background: #1b3348; }
.nav-btn.active { color: #fff; box-shadow: inset 3px 0 0 var(--gold); }
.sidebar-foot { margin-top: auto; padding: 10px; font-size: 12px; color: #9bb0c3; }
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; gap: 10px; padding: 12px 18px;
  border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--card) 88%, transparent);
  position: sticky; top: 0; z-index: 10; backdrop-filter: blur(10px);
}
.crumb { font-weight: 650; flex: 1; }
.ghost, .btn, .btn-gold, .btn-ink {
  border-radius: 12px; border: 1px solid var(--line); background: var(--card);
  padding: 10px 14px; cursor: pointer;
}
.btn { background: var(--teal); color: #fff; border-color: transparent; font-weight: 600; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-gold { background: var(--gold); color: #1a1408; border: 0; font-weight: 700; }
.btn-ink { background: var(--navy); color: #fff; border: 0; }
.ghost { background: transparent; }
.view { padding: 18px; max-width: 1100px; width: 100%; margin: 0 auto 40px; }
.grid { display: grid; gap: 14px; }
.g2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow);
}
.kicker { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--teal); font-weight: 700; }
.muted { color: var(--muted); }
.tiny { font-size: 13px; color: var(--muted); font-weight: 500; }
.chip { color: var(--ink); }
.stat { font-size: 28px; font-family: Fraunces, serif; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 8px; border-radius: 999px;
  background: var(--chip); font-size: 12px; margin: 2px;
}
.chip.ok { background: var(--ok-bg); color: var(--ok); }
.chip.bad { background: var(--bad-bg); color: var(--bad); }
.chip.warn { background: var(--warn-bg); color: var(--warn); }
.chip.official { background: #e7eef8; color: #1e3a8a; }
.chip.app { background: var(--gold-soft); color: #6a4a14; }
.progress { height: 8px; background: var(--chip); border-radius: 99px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: var(--teal); }
label.field { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 600; }
input[type=text], input[type=email], input[type=password], input[type=date], input[type=number],
select, textarea {
  border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; background: var(--card);
}
textarea { min-height: 90px; }
.option {
  display: flex; gap: 10px; align-items: flex-start; border: 1px solid var(--line);
  border-radius: 12px; padding: 12px; margin: 8px 0; cursor: pointer; background: var(--card);
}
.option input { margin-top: 3px; }
.option.selected { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(14,111,108,.15); }
.option.correct { border-color: var(--ok); background: var(--ok-bg); }
.option.wrong { border-color: var(--bad); background: var(--bad-bg); }
.stem { font-size: 18px; line-height: 1.45; margin: 8px 0 14px; }
.exhibit {
  white-space: pre-wrap; background: var(--chip); border-radius: 12px; padding: 12px; font-size: 14px;
}
.timer {
  font-variant-numeric: tabular-nums; font-weight: 700; background: var(--navy); color: #fff;
  padding: 6px 10px; border-radius: 10px;
}
.banner {
  border-radius: 12px; padding: 10px 12px; font-size: 13px; margin: 8px 0 14px;
  background: var(--gold-soft);
}
.banner.official { background: #e7eef8; }
.banner.warn { background: var(--warn-bg); }
.banner.bad { background: var(--bad-bg); }
.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cal .dow { font-size: 11px; text-align: center; color: var(--muted); }
.daycell {
  border: 1px solid var(--line); border-radius: 10px; min-height: 64px; padding: 6px; font-size: 12px;
  background: var(--card); cursor: pointer;
}
.daycell.off { opacity: .45; }
.daycell.exam { outline: 2px solid var(--gold); }
.daycell.study { background: color-mix(in srgb, var(--teal) 12%, var(--card)); }
.bar-row { display: flex; align-items: center; gap: 8px; margin: 6px 0; font-size: 13px; }
.bar-row span.name { width: 170px; flex: 0 0 170px; }
.bar-row .track { flex: 1; height: 10px; background: var(--chip); border-radius: 99px; overflow: hidden; }
.bar-row .track i { display: block; height: 100%; background: var(--teal); }
.chat { display: flex; flex-direction: column; gap: 8px; max-height: 420px; overflow: auto; }
.bubble { padding: 10px 12px; border-radius: 14px; max-width: 90%; }
.bubble.me { align-self: flex-end; background: var(--teal); color: #fff; }
.bubble.ai { align-self: flex-start; background: var(--chip); }
.landing { max-width: 1080px; margin: 0 auto; padding: 28px 18px 80px; }
.hero { display: grid; grid-template-columns: 1.15fr .85fr; gap: 24px; align-items: center; }
.hero h1 { font-size: clamp(36px, 6vw, 62px); line-height: 1.05; margin: 8px 0 12px; }
.hero-card { background: var(--navy); color: #eaf1f6; border-radius: 24px; padding: 22px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
hr.sep { border: 0; border-top: 1px solid var(--line); margin: 16px 0; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
.hidden { display: none !important; }
#menuBtn { display: none; }
@media (max-width: 900px) {
  .hero, .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; left: 0; top: 0; transform: translateX(-105%);
    transition: transform .2s ease; width: min(86vw, 300px);
  }
  .sidebar.open { transform: none; }
  #menuBtn { display: inline-flex; }
  .bar-row span.name { width: 110px; flex-basis: 110px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}
:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

.beta-ribbon {
  background: #102033;
  color: #e8eef3;
  font-size: 12px;
  letter-spacing: .02em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 8px 14px;
  text-align: center;
  border-bottom: 2px solid #0e6f6c;
}
.beta-pill, .beta-chip {
  background: #b8893e;
  color: #1a1408;
  font-weight: 800;
  font-size: 10px;
  letter-spacing: .12em;
  padding: 3px 8px;
  border-radius: 999px;
}
.miss-row {
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
  color: var(--ink);
}
.chip.official { color: #1e3a8a; }
[data-theme="dark"] .chip.official { color: #d7e4ff; background: #243656; }
[data-theme="dark"] .chip.app { color: #f3e2c2; }
.option { color: var(--ink); }
.stem { color: var(--ink); font-weight: 600; }
.legal-foot {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 18px 36px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}
.legal-foot.in-app { max-width: 1100px; padding: 8px 18px 28px; }
.disclaimer-grid { margin-top: 28px; }
.disclaimer-card {
  border-left: 4px solid var(--teal);
}
.hero-card {
  position: relative;
  overflow: hidden;
}
.hero-card::after {
  content: "";
  position: absolute;
  right: -20px;
  bottom: -24px;
  width: 140px;
  height: 140px;
  opacity: .12;
  background: #fff;
  clip-path: polygon(38% 0, 62% 0, 62% 38%, 100% 38%, 100% 62%, 62% 62%, 62% 100%, 38% 100%, 38% 62%, 0 62%, 0 38%, 38% 38%);
}
.app-shell { padding-top: 0; }
.card {
  border-top: 2px solid color-mix(in srgb, var(--teal) 35%, var(--line));
}
.sidebar .brand-name { font-family: Fraunces, Georgia, serif; letter-spacing: .04em; }
.landing .mark { color: #fff; }
@media (max-width: 700px) {
  .beta-ribbon { font-size: 11px; justify-content: flex-start; }
}


.pub-nav {
  display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
  padding-bottom: 12px; border-bottom: 1px solid var(--line); margin-bottom: 8px;
}
.article-body p { font-size: 17px; line-height: 1.65; color: var(--ink); margin: 0 0 14px; }
.article-page h1 { font-size: clamp(28px, 4vw, 44px); }
/* Free NCLEX Prep V3 Nurse-Tech visual system */
:root{--electric:#35e7d0;--pulse:#7cf7e8;--glass:rgba(255,255,255,.72)}
body:before{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;background:linear-gradient(90deg,transparent 49.8%,rgba(14,111,108,.035) 50%,transparent 50.2%),linear-gradient(0deg,transparent 49.8%,rgba(14,111,108,.025) 50%,transparent 50.2%);background-size:64px 64px}
.mark{position:relative;box-shadow:0 0 0 1px rgba(124,247,232,.18),0 0 28px rgba(53,231,208,.22)}
.mark:after{content:"";position:absolute;width:46px;height:1px;left:38px;background:linear-gradient(90deg,var(--electric),transparent);opacity:.7}
.sidebar{box-shadow:18px 0 60px rgba(5,24,35,.13)}
.nav-btn{transition:.18s ease;border:1px solid transparent}.nav-btn:hover{transform:translateX(3px);border-color:rgba(124,247,232,.12)}
.nav-btn.active{background:linear-gradient(90deg,rgba(53,231,208,.16),rgba(255,255,255,.04));box-shadow:inset 3px 0 0 var(--electric),0 0 24px rgba(53,231,208,.07)}
.card{position:relative;overflow:hidden;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}.card:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--teal) 38%,var(--line));box-shadow:0 18px 50px rgba(16,32,51,.11)}
.hero-card{position:relative;overflow:hidden;background:linear-gradient(145deg,#0b1b2b,#0a3942);border:1px solid rgba(124,247,232,.16);box-shadow:0 24px 70px rgba(5,33,43,.22)}
.hero-card:after{content:"♥  /\\_/\\  +  ECG";position:absolute;right:-8px;bottom:8px;font:700 11px monospace;letter-spacing:.18em;color:rgba(124,247,232,.2);transform:rotate(-7deg)}
.kicker{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.kicker:before{content:"+ ";color:var(--electric)}
.btn{background:linear-gradient(135deg,var(--teal),#0a8883);box-shadow:0 8px 22px rgba(14,111,108,.16)}
.pub-nav,.seo-nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0 16px;border-bottom:1px solid var(--line);margin-bottom:24px}.seo-nav a{text-decoration:none;font-weight:700}
.article-body{font-size:17px;line-height:1.75;max-width:820px}.article-body h2{margin-top:30px}.article-page>h1{max-width:850px;font-size:clamp(34px,5vw,58px);line-height:1.08}
@media(max-width:760px){.article-body{font-size:16px}.pub-nav{align-items:flex-start}.pub-links{justify-content:flex-end}}

/* V3.3 simplified student navigation */
.signout-nav{margin-top:6px;color:#ffd9d9!important;border-color:rgba(255,120,120,.18)!important}
.top-signout{white-space:nowrap}
@media(max-width:760px){.top-signout{font-size:12px;padding:8px 10px}.nav-btn{padding:12px 10px;font-size:15px}}

.sync-status{padding:8px 16px;font-size:14px;background:var(--paper,#eef7f6);color:var(--ink,#102033);border-bottom:1px solid var(--line,#ccc)}
.section-nav{flex-wrap:wrap;margin-bottom:16px}button:disabled{opacity:.6;cursor:wait}