:root {
  --bg-0: #eaf6ff;
  --bg-1: #b9e3ff;
  --bg-2: #6bc4ff;
  --ink: #0b2540;
  --ink-soft: #46627e;
  --ink-mute: #7a8ea4;
  --line: #d6e6f4;
  --card: #ffffff;
  --accent: #0b6bcb;
  --accent-2: #38bdf8;
  --good: #16a34a;
  --warn: #d97706;
  --bad:  #dc2626;
  --pill: #eef6ff;
  --shadow: 0 18px 40px rgba(11, 37, 64, 0.10), 0 2px 6px rgba(11, 37, 64, 0.06);
  --radius: 18px;
  --radius-sm: 12px;
  --max: 760px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "SF Pro Text", "Inter", Roboto, system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at -10% -20%, var(--bg-1), transparent 60%),
    radial-gradient(900px 600px at 110% 0%, #cdebff, transparent 60%),
    linear-gradient(180deg, var(--bg-0), #ffffff 70%);
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 22px;
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  background: rgba(255,255,255,0.65);
  border-bottom: 1px solid rgba(11,107,203,0.08);
}

.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 17px; letter-spacing: -0.01em;
  color: var(--ink);
}

.logo { width: 28px; height: 28px; color: var(--accent); }

.topnav { display: flex; gap: 6px; }

.link {
  background: transparent; border: 0; cursor: pointer;
  font: inherit; color: var(--accent);
  padding: 8px 12px; border-radius: 999px;
}
.link:hover { background: rgba(11,107,203,0.08); }

.app {
  max-width: var(--max);
  margin: 28px auto 80px;
  padding: 0 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow);
  animation: rise 0.35s cubic-bezier(.2,.8,.2,1);
}

@keyframes rise {
  from { transform: translateY(8px); opacity: 0; }
  to   { transform: translateY(0);   opacity: 1; }
}

.step-meta {
  display: flex; align-items: center; gap: 10px;
  font-size: 12px; color: var(--ink-mute);
  text-transform: uppercase; letter-spacing: .14em;
  margin-bottom: 12px;
}
.step-meta .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); }

.step-title {
  margin: 0 0 6px; font-size: 26px; line-height: 1.15; letter-spacing: -0.02em;
}
.step-sub {
  margin: 0 0 22px; color: var(--ink-soft); font-size: 15.5px; line-height: 1.5;
}

.step-body { display: grid; gap: 14px; }
.step-actions { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: 12px 18px; border-radius: 12px; border: 1px solid transparent;
  font: inherit; font-weight: 600; font-size: 15px; cursor: pointer;
  transition: transform .05s ease, background .15s ease, box-shadow .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 18px rgba(11,107,203,0.35); }
.btn-primary:hover { background: #0a5fb5; }
.btn-ghost { background: transparent; color: var(--ink-soft); }
.btn-ghost:hover { background: rgba(11, 37, 64, 0.05); }
.btn-secondary { background: #eef6ff; color: var(--accent); border-color: #cfe6ff; }
.btn-secondary:hover { background: #e2efff; }

.choices { display: grid; gap: 10px; }
.choice {
  text-align: left;
  background: #fbfdff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  cursor: pointer; font: inherit;
  display: grid; grid-template-columns: 28px 1fr auto; gap: 14px; align-items: center;
  transition: border-color .15s ease, background .15s ease, transform .05s ease;
}
.choice:hover { border-color: var(--accent-2); background: #f3faff; }
.choice:active { transform: translateY(1px); }
.choice .ico {
  width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center;
  background: var(--pill); color: var(--accent); font-size: 16px;
}
.choice .ttl { font-weight: 600; font-size: 15.5px; }
.choice .sub { color: var(--ink-mute); font-size: 13px; margin-top: 2px; }
.choice .arrow { color: var(--ink-mute); }

.opts { display: grid; gap: 10px; }
.opts.cols-2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 540px) { .opts.cols-2 { grid-template-columns: 1fr; } }
.opt {
  text-align: left; cursor: pointer; font: inherit;
  background: #fbfdff; border: 1px solid var(--line); border-radius: 14px;
  padding: 14px 16px;
  display: grid; grid-template-columns: 1fr 26px; gap: 12px; align-items: center;
  transition: border-color .15s ease, background .15s ease, transform .05s ease;
}
.opt:hover { border-color: var(--accent-2); background: #f3faff; }
.opt.selected { border-color: var(--accent); background: #eaf3ff; }
.opt .ttl { font-weight: 600; font-size: 15px; }
.opt .sub { color: var(--ink-mute); font-size: 13px; margin-top: 3px; line-height: 1.4; }
.opt .mark {
  width: 22px; height: 22px; border-radius: 7px;
  border: 2px solid var(--line); display: grid; place-items: center;
  color: transparent; font-size: 14px; font-weight: 800;
}
.opt.selected .mark { background: var(--accent); border-color: var(--accent); color: #fff; }

.yesno { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.yesno .opt { grid-template-columns: 1fr; justify-items: center; text-align: center; padding: 16px; }
.yesno .opt .ttl { font-size: 16px; }

.qstack { display: grid; gap: 22px; }
.q-label {
  font-weight: 600; font-size: 15px; color: var(--ink);
  margin: 0 0 10px;
}
.q-help { color: var(--ink-mute); font-size: 13px; margin: -6px 0 10px; line-height: 1.4; }
.section-h {
  font-size: 12px; font-weight: 800;
  text-transform: uppercase; letter-spacing: .14em;
  color: var(--accent);
  margin: 8px 0 -10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}
.section-h:first-child { border-top: 0; padding-top: 0; }

.modal {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(11, 37, 64, 0.55);
  display: grid; place-items: center;
  padding: 18px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: fade-in 0.2s ease;
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.modal[hidden] { display: none; }
.modal-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 26px;
  width: 100%; max-width: 440px;
  position: relative;
  animation: rise 0.3s cubic-bezier(.2,.8,.2,1);
}
.modal-close {
  position: absolute; top: 10px; right: 12px;
  background: transparent; border: 0; font-size: 26px; line-height: 1;
  color: var(--ink-mute); cursor: pointer; padding: 4px 10px; border-radius: 999px;
}
.modal-close:hover { background: rgba(11, 37, 64, 0.06); color: var(--ink); }

.code-input {
  font-size: 28px; letter-spacing: .5em; text-align: center;
  font-weight: 700; font-variant-numeric: tabular-nums;
  padding: 14px 12px;
}

.recent-banner {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 13px; color: var(--ink-soft);
  background: #eef6ff; border: 1px solid #cfe6ff;
  border-radius: 12px; padding: 10px 14px;
  margin: -6px 0 6px;
}
.recent-banner strong { color: var(--ink); }
.recent-banner .pill {
  background: #fff; border: 1px solid #cfe6ff; border-radius: 999px;
  padding: 2px 10px; font-size: 12px; color: var(--accent); font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .modal { background: rgba(0,0,0,0.6); }
  .modal-close:hover { background: rgba(255,255,255,0.08); }
  .recent-banner { background: #0a1d31; border-color: #133456; }
  .recent-banner .pill { background: #0c2034; border-color: #133456; }
}

.coach-greet {
  font-size: 14.5px; color: var(--ink-soft); line-height: 1.55;
  background: #f3faff; border: 1px solid #d6eafd; border-radius: 12px;
  padding: 12px 14px;
}
.coach-greet strong { color: var(--ink); }

.steps-num { display: grid; gap: 12px; counter-reset: step; }
.step-num {
  position: relative; padding: 14px 16px 14px 56px;
  border: 1px solid var(--line); border-radius: 14px;
  background: #fbfdff;
}
.step-num::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 14px; top: 14px;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: #fff;
  display: grid; place-items: center; font-weight: 700; font-size: 13px;
}
.step-num h3 { margin: 0 0 4px; font-size: 16px; }
.step-num p  { margin: 0; color: var(--ink-soft); font-size: 14.5px; line-height: 1.5; }
.step-num .dose {
  margin-top: 8px;
  font-variant-numeric: tabular-nums; font-size: 14.5px;
  background: #fff; border: 1px dashed #cfe6ff; border-radius: 10px; padding: 8px 12px;
}
.step-num.warn { border-color: #fde68a; background: #fffbeb; }
.step-num.bad  { border-color: #fecaca; background: #fef2f2; }
.step-num.good { border-color: #bbf7d0; background: #f0fdf4; }
.step-num.warn::before { background: var(--warn); }
.step-num.bad::before  { background: var(--bad); }
.step-num.good::before { background: var(--good); }

.field {
  display: grid; gap: 6px;
}
.field label {
  font-size: 13.5px; color: var(--ink-soft); font-weight: 600;
}
.field .hint { font-size: 12px; color: var(--ink-mute); }
.field input, .field select {
  font: inherit; font-size: 15px; color: var(--ink);
  padding: 12px 14px; border-radius: 12px;
  border: 1px solid var(--line); background: #fff;
  outline: none; transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field select:focus {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(56,189,248,0.18);
}

.row2 { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; }
@media (max-width: 540px) { .row2 { grid-template-columns: 1fr; } }

.tests {
  display: grid; gap: 12px; grid-template-columns: repeat(2, 1fr);
}
@media (max-width: 540px) { .tests { grid-template-columns: 1fr; } }
.tests .field input { padding-right: 44px; }
.tests .with-unit { position: relative; }
.tests .with-unit .unit {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  color: var(--ink-mute); font-size: 12px; pointer-events: none;
}

.recs { display: grid; gap: 12px; }
.rec {
  border: 1px solid var(--line);
  border-radius: 14px; padding: 14px 16px;
  background: #fbfdff;
  display: grid; gap: 6px;
}
.rec .rec-h { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.rec .badge {
  font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  padding: 3px 8px; border-radius: 999px;
}
.badge.good { background: #dcfce7; color: #15803d; }
.badge.warn { background: #fef3c7; color: #92400e; }
.badge.bad  { background: #fee2e2; color: #991b1b; }
.badge.info { background: #e0f2fe; color: #075985; }
.rec h3 { margin: 0; font-size: 16px; }
.rec p  { margin: 0; color: var(--ink-soft); font-size: 14.5px; line-height: 1.5; }
.rec a  { color: var(--accent); }
.rec ul { margin: 4px 0 0 18px; padding: 0; color: var(--ink-soft); font-size: 14.5px; }
.rec ul li { margin: 2px 0; }
.rec .dose {
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
  font-size: 14.5px;
  background: #fff; border: 1px dashed #cfe6ff; border-radius: 10px; padding: 8px 12px;
}

.profile-summary {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 8px;
}
.chip {
  font-size: 12px; color: var(--accent); background: var(--pill);
  border: 1px solid #cfe6ff; padding: 4px 10px; border-radius: 999px;
}

.foot {
  max-width: var(--max); margin: 0 auto; padding: 0 18px 40px;
  color: var(--ink-mute); font-size: 13px; text-align: center;
}
.foot a { color: var(--accent); }

.callout {
  border-left: 3px solid var(--accent-2);
  background: #f3faff;
  padding: 10px 14px; border-radius: 8px;
  color: var(--ink-soft); font-size: 14px; line-height: 1.5;
}
.callout strong { color: var(--ink); }

.refs { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line); }
.refs h4 { margin: 0 0 6px; font-size: 13px; color: var(--ink-mute); text-transform: uppercase; letter-spacing: .12em; }
.refs ul { margin: 0; padding-left: 18px; font-size: 14px; }
.refs a { color: var(--accent); }

@media (prefers-color-scheme: dark) {
  :root {
    --bg-0: #04101e;
    --bg-1: #082841;
    --ink: #e8f2ff;
    --ink-soft: #b9cde0;
    --ink-mute: #7c95ad;
    --line: #133456;
    --card: #0d2238;
    --pill: #0e2b46;
    --shadow: 0 18px 40px rgba(0,0,0,0.5), 0 2px 6px rgba(0,0,0,0.3);
  }
  body {
    background:
      radial-gradient(1000px 600px at -10% -20%, #082841, transparent 60%),
      radial-gradient(800px 500px at 110% 0%, #0a3a5e, transparent 60%),
      linear-gradient(180deg, #04101e, #061827 70%);
  }
  .topbar { background: rgba(13, 34, 56, 0.65); border-bottom-color: #0a2236; }
  .choice { background: #0c2034; }
  .choice:hover { background: #102a45; }
  .field input, .field select { background: #0a1d31; color: var(--ink); }
  .rec { background: #0c2034; }
  .rec .dose { background: #0a1d31; border-color: #133456; }
  .btn-secondary { background: #0e2b46; color: #93cffd; border-color: #133456; }
  .badge.good { background: #052e16; color: #86efac; }
  .badge.warn { background: #3b2607; color: #fcd34d; }
  .badge.bad  { background: #3b0a0a; color: #fca5a5; }
  .badge.info { background: #052338; color: #93cffd; }
  .callout { background: #0a1d31; }
  .opt { background: #0c2034; }
  .opt:hover { background: #102a45; }
  .opt.selected { background: #103556; border-color: #2da9ff; }
  .opt .mark { border-color: #1f3e5e; }
  .coach-greet { background: #0a1d31; border-color: #133456; }
  .step-num { background: #0c2034; }
  .step-num.warn { background: #2a1d05; border-color: #6b4b09; }
  .step-num.bad  { background: #2a0a0a; border-color: #6b1d1d; }
  .step-num.good { background: #052a18; border-color: #16653b; }
  .step-num .dose { background: #0a1d31; border-color: #133456; }
}