/* ============================================================================
   BloodScan Biotech — CTC 檢測預約填單系統 (redesign per the UX/UI spec)
   Premium medical booking wizard: 3-step flow, desktop 65/35 + sticky summary,
   mobile progress bar + sticky CTA, time pills, lab region tabs+cards,
   conditional referral field, floating labels, on-blur validation.
   ========================================================================== */
:root{
  --bg:#F8FAFC; --card:#FFFFFF; --navy:#1F3A5F; --navy-2:#152C49;
  --accent:#1F3A5F;            /* selected / current / submit — brand deep navy only */
  --accent-tint:#EAF1F9;       /* selected background wash */
  --text:#1E293B; --muted:#64748B; --border:#E2E8F0; --border-2:#CBD5E1;
  --ok:#16A34A; --err:#D9663D; --radius:6px;
  --shadow:0 1px 2px rgba(15,23,42,.04),0 8px 24px rgba(15,23,42,.06);
  --shadow-lg:0 12px 40px rgba(15,23,42,.10);
  --font-head:'Poppins','Noto Sans TC',system-ui,-apple-system,sans-serif;
  --font-body:'Roboto','Noto Sans TC',-apple-system,'Segoe UI',system-ui,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--text); font-family:var(--font-body);
  line-height:1.6; -webkit-font-smoothing:antialiased; font-size:16px;
  min-height:100vh;
}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--font-head);color:var(--navy);margin:0;line-height:1.25}

/* ---- top nav (matches the main site) ---- */
.bk-nav{
  position:sticky; top:0; z-index:50; background:var(--navy);
  display:flex; align-items:center; gap:22px; padding:0 30px; height:70px;
}
.bk-nav .brand{display:inline-flex;align-items:center;height:34px;margin-right:6px}
.bk-nav .brand svg{height:26px;width:auto;fill:#fff;color:#fff}
.bk-nav .nav-links{display:flex;align-items:center;gap:20px;margin-left:40px}
.bk-nav .nav-links a,.bk-nav .dd > button{color:#fff;text-decoration:none;font-family:var(--font-body);font-size:14px;font-weight:500;background:none;border:0;cursor:pointer;padding:0;display:inline-flex;align-items:center;gap:6px;line-height:1}
/* site-wide Book-Now CTA pill (matches ds-nav): desktop left of globe, mobile between logo and globe */
.bk-nav .bk-cta{margin-left:auto;background:#0084D4;color:#fff;font-family:var(--font-body);font-size:14px;font-weight:500;line-height:1;text-decoration:none;border-radius:9999px;padding:9px 18px;white-space:nowrap;flex:0 0 auto}
.bk-nav .bk-cta:hover{background:#006CB8}
.bk-nav .nav-links a:hover,.bk-nav .dd > button:hover{color:#cfe0f2}
.bk-nav .dd{position:relative}
.bk-nav .dd > button .caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-2px) rotate(45deg);transition:transform .2s}
.bk-nav .dd.open > button .caret{transform:translateY(1px) rotate(-135deg)}
.bk-nav .dd-menu{position:absolute;top:150%;left:50%;transform:translateX(-50%);background:#fff;border-radius:12px;box-shadow:var(--shadow-lg);padding:8px;min-width:170px;display:none;z-index:60}
.bk-nav .dd:hover .dd-menu,.bk-nav .dd.open .dd-menu{display:block}
.bk-nav .dd-menu a{display:block;color:var(--navy);padding:10px 14px;border-radius:8px;font-size:14px;font-weight:500;white-space:nowrap}
.bk-nav .dd-menu a:hover{background:var(--accent-tint)}
.bk-globe{width:40px;height:40px;border:0;background:transparent;color:#fff;border-radius:9999px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;padding:0;flex:0 0 auto}
.bk-globe:hover{background:rgba(255,255,255,.14)}
#bk-lang-menu{position:absolute;top:60px;right:18px;min-width:150px;background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:12px;box-shadow:var(--shadow-lg);padding:6px;display:none;z-index:70}
#bk-lang-menu.open{display:block}
#bk-lang-menu a{display:block;padding:10px 14px;border-radius:8px;text-decoration:none;color:var(--navy);font-size:.9rem;font-weight:600}
#bk-lang-menu a:hover{background:var(--accent-tint)}
#bk-lang-menu a[aria-current=true]{color:#2563EB}
/* mobile hamburger + slide-down menu */
.bk-hamb{display:none;width:40px;height:40px;border:0;background:transparent;color:#fff;border-radius:8px;cursor:pointer;align-items:center;justify-content:center;flex:0 0 auto}
.bk-hamb:hover{background:rgba(255,255,255,.14)}
.bk-mobile-menu{display:none;position:fixed;top:70px;left:0;right:0;background:var(--navy);border-top:1px solid rgba(255,255,255,.1);padding:8px 20px 20px;z-index:49;box-shadow:0 12px 24px rgba(15,23,42,.25)}
.bk-mobile-menu.open{display:block}
.bk-mobile-menu a{display:block;color:#fff;text-decoration:none;font-size:1.02rem;padding:13px 4px;border-bottom:1px solid rgba(255,255,255,.08)}
.bk-mobile-menu a.sub{padding-left:18px;font-size:.96rem;color:#cfe0f2}
.bk-mobile-menu .grp{color:#8ba9cc;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;padding:14px 4px 4px}
@media(max-width:900px){
  .bk-nav{padding:0 14px 0 18px;height:64px}
  .bk-nav .nav-links{display:none}
  .bk-hamb{display:inline-flex}
  .bk-mobile-menu{top:64px}
  /* mobile: pill between logo and globe */
  .bk-nav .bk-cta{margin-left:18px;padding:8px 14px;font-size:13px}
  .bk-globe{margin-left:auto}
}

/* mobile top progress line (33/66/100%) */
.bk-progress{position:sticky;top:64px;z-index:40;height:4px;background:#E2E8F0;display:none}
.bk-progress > i{display:block;height:100%;background:#2563EB;width:33%;transition:width .45s cubic-bezier(.4,0,.2,1)}

/* ---- page shell ---- */
/* clear the shared fixed ds-nav (booking page now uses the site-wide chrome) */
.bk-page{padding-top:88px}
@media(max-width:767.98px){.bk-page{padding-top:64px}}
.bk-hero{max-width:1120px;margin:0 auto;padding:40px 24px 8px}
.bk-hero .kicker{font-family:var(--font-head);font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#2563EB;font-size:.72rem;margin-bottom:10px}
.bk-hero h1{font-size:2rem;font-weight:900;letter-spacing:-.01em}
.bk-hero p{color:var(--muted);max-width:640px;margin:12px 0 0;font-size:1.02rem}

.bk-wrap{max-width:1120px;margin:0 auto;padding:24px 24px 120px;display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:960px){.bk-wrap{grid-template-columns:63% 1fr;align-items:start}}

/* ---- form card (left, 65%) ---- */
.bk-card{background:var(--card);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);padding:28px 30px 24px}
@media(max-width:640px){.bk-card{padding:22px 18px 20px;border-radius:10px}}

/* desktop step indicator */
.bk-steps{display:flex;align-items:center;gap:0;margin-bottom:22px}
.bk-steps .s{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.bk-steps .dot{width:28px;height:28px;border-radius:9999px;border:1.5px solid var(--border-2);color:var(--muted);display:flex;align-items:center;justify-content:center;font-size:.82rem;font-weight:700;font-family:var(--font-head);background:#fff;flex:0 0 auto}
.bk-steps .s.on .dot{background:var(--navy);border-color:var(--navy);color:#fff}
.bk-steps .s.done .dot{background:#fff;border-color:var(--navy);color:var(--navy)}
.bk-steps .lbl{font-size:.82rem;font-weight:600;color:var(--muted);white-space:nowrap}
.bk-steps .s.on .lbl{color:var(--navy)}
.bk-steps .bar{flex:1 1 auto;height:1.5px;background:var(--border);margin:0 12px;min-width:16px}
.bk-steps .s.done + .bar{background:var(--navy)}
@media(max-width:640px){.bk-steps{display:none}}

.bk-step-head{margin-bottom:18px}
.bk-step-head .n{font-family:var(--font-head);font-size:.74rem;font-weight:700;letter-spacing:.12em;color:#2563EB;text-transform:uppercase}
.bk-step-head h2{font-size:1.28rem;font-weight:700;margin-top:4px}
.bk-step-head p{color:var(--muted);font-size:.92rem;margin:6px 0 0}

/* ---- floating-label field ---- */
.bk-field{position:relative;margin:0 0 18px}
.bk-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:560px){.bk-row{grid-template-columns:1fr}}
.bk-fl{position:relative}
.bk-fl input,.bk-fl textarea{
  width:100%;font:inherit;font-size:1rem;color:var(--text);background:#fff;
  border:1.5px solid var(--border-2);border-radius:var(--radius);
  padding:22px 14px 8px;outline:none;transition:border-color .15s,box-shadow .15s;
}
.bk-fl textarea{min-height:120px;resize:vertical;padding-top:24px}
.bk-fl input:focus,.bk-fl textarea:focus{border-color:var(--navy);box-shadow:0 0 0 3px rgba(31,58,95,.10)}
.bk-fl label{
  position:absolute;left:15px;top:15px;color:var(--muted);font-size:1rem;pointer-events:none;
  transition:transform .15s ease,color .15s,font-size .15s;transform-origin:left top;background:transparent;
}
.bk-fl input:focus + label,.bk-fl input.has-val + label,
.bk-fl textarea:focus + label,.bk-fl textarea.has-val + label{
  transform:translateY(-9px) scale(.74);color:var(--navy);font-weight:600;
}
.bk-fl input:required + label::after,.bk-fl textarea:required + label::after{content:" *";color:#2563EB}
/* native date input: match the text fields (height, font, no oversized native chrome) */
.bk-fl input{height:56px}
.bk-fl input[type=date]{-webkit-appearance:none;appearance:none;font-size:1rem;color:var(--text)}
/* at rest (no value, not focused) hide native yyyy/mm/dd so only the resting label shows — matches the other fields */
.bk-fl input[type=date]:not(:focus):not(.has-val){color:transparent}
.bk-fl input[type=date]::-webkit-date-and-time-value{text-align:left;margin:0}
.bk-fl input[type=date]::-webkit-calendar-picker-indicator{opacity:.55;cursor:pointer}
/* validation */
.bk-fl.ok input{border-color:var(--ok)}
.bk-fl .tick{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--ok);opacity:0;transition:opacity .2s}
.bk-fl.ok .tick{opacity:1}
.bk-hint{font-size:.78rem;color:var(--muted);margin:6px 2px 0}
.bk-err{font-size:.8rem;color:var(--err);margin:6px 2px 0;min-height:0;opacity:0;max-height:0;overflow:hidden;transition:opacity .2s,max-height .2s}
.bk-fl.bad input{border-color:var(--err)}
.bk-fl.bad ~ .bk-err,.bk-field.bad .bk-err{opacity:1;max-height:40px}

/* ---- pills (best time) ---- */
.bk-label{font-family:var(--font-head);font-size:.9rem;font-weight:600;color:var(--navy);margin:0 0 10px;display:block}
.bk-optnote{font-family:var(--font-body);font-weight:400;font-size:.82rem;color:var(--muted)}
.bk-pills{display:flex;flex-wrap:wrap;gap:10px}
.bk-pill{
  border:1.5px solid var(--border-2);background:#fff;color:var(--text);
  border-radius:9999px;padding:9px 18px;font:inherit;font-size:.94rem;cursor:pointer;
  transition:all .15s;user-select:none;
}
.bk-pill:hover{border-color:var(--navy)}
.bk-pill.sel{background:var(--navy);border-color:var(--navy);color:#fff;font-weight:600}

/* ---- lab region tabs + cards ---- */
.bk-note{font-size:.82rem;color:var(--muted);margin:0 0 14px;display:flex;align-items:center;gap:6px}
.bk-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.bk-tab{border:0;background:#EEF2F7;color:var(--muted);border-radius:8px;padding:8px 16px;font:inherit;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .15s}
.bk-tab:hover{background:#E2E8F0}
.bk-tab.sel{background:var(--navy);color:#fff}
.bk-labs{display:grid;grid-template-columns:1fr;gap:10px}
@media(min-width:600px){.bk-labs{grid-template-columns:1fr 1fr}}
.bk-lab{
  display:flex;align-items:flex-start;gap:12px;text-align:left;
  border:1.5px solid var(--border-2);background:#fff;border-radius:var(--radius);
  padding:14px 14px;cursor:pointer;transition:all .15s;font:inherit;width:100%;
}
.bk-lab:hover{border-color:var(--navy);box-shadow:var(--shadow)}
.bk-lab.sel{border-color:var(--navy);background:var(--accent-tint);box-shadow:0 0 0 1px var(--navy) inset}
.bk-lab .radio{width:18px;height:18px;border-radius:9999px;border:2px solid var(--border-2);flex:0 0 auto;margin-top:2px;position:relative}
.bk-lab.sel .radio{border-color:var(--navy)}
.bk-lab.sel .radio::after{content:"";position:absolute;inset:3px;border-radius:9999px;background:var(--navy)}
.bk-lab .info{flex:1 1 auto;min-width:0}
.bk-lab .nm{font-weight:700;color:var(--navy);font-size:.98rem;font-family:var(--font-head)}
.bk-lab .ad{color:var(--muted);font-size:.82rem;margin-top:3px;line-height:1.45}
.bk-lab .map{color:var(--muted);flex:0 0 auto;display:inline-flex;padding:4px;border-radius:6px}
.bk-lab .map:hover{color:var(--navy);background:#EEF2F7}

/* ---- how-did-you-hear select + conditional referral ---- */
.bk-select{position:relative}
.bk-select select{
  width:100%;font:inherit;font-size:1rem;color:var(--text);background:#fff;
  border:1.5px solid var(--border-2);border-radius:var(--radius);padding:14px 40px 14px 14px;
  outline:none;-webkit-appearance:none;appearance:none;cursor:pointer;
}
.bk-select select:focus{border-color:var(--navy);box-shadow:0 0 0 3px rgba(31,58,95,.10)}
.bk-select::after{content:"";position:absolute;right:16px;top:50%;width:9px;height:9px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:translateY(-70%) rotate(45deg);pointer-events:none}
.bk-reveal{max-height:0;opacity:0;overflow:hidden;transition:max-height .35s ease,opacity .35s ease,margin .35s}
.bk-reveal.show{max-height:120px;opacity:1;margin-top:16px}

/* ---- footer nav buttons ---- */
.bk-actions{display:flex;align-items:center;gap:12px;margin-top:26px}
.bk-actions .grow{margin-left:auto}
.btn{border:0;border-radius:9999px;font:inherit;font-weight:600;font-size:1rem;cursor:pointer;padding:13px 26px;transition:all .15s;display:inline-flex;align-items:center;gap:9px;justify-content:center}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover:not(:disabled){background:var(--navy-2)}
.btn-ghost{background:#fff;color:var(--navy);border:1.5px solid var(--border-2)}
.btn-ghost:hover{border-color:var(--navy)}

/* ---- right summary panel (35%, sticky) ---- */
.bk-summary{position:sticky;top:88px;background:var(--navy);color:#fff;border-radius:12px;padding:24px 22px;box-shadow:var(--shadow-lg)}
@media(max-width:959px){.bk-summary{display:none}}
.bk-summary h3{color:#fff;font-size:1.02rem;font-weight:700;letter-spacing:.02em}
.bk-summary .plan{color:#9fc0e6;font-size:.82rem;margin-top:2px}
.bk-summary dl{margin:20px 0 0;display:grid;gap:15px}
.bk-summary dt{color:#9fb6d3;font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;font-weight:600}
.bk-summary dd{margin:3px 0 0;font-size:.96rem;font-weight:500;color:#fff;line-height:1.4}
.bk-summary dd.empty{color:#6f8bb0;font-weight:400}
.bk-summary .divider{height:1px;background:rgba(255,255,255,.14);margin:22px 0}
.bk-lock{display:flex;align-items:center;gap:10px;color:#cfe0f2;font-size:.8rem;line-height:1.4}
.bk-lock svg{flex:0 0 auto;color:#7fd4be}

/* ---- mobile sticky bottom bar ---- */
.bk-bottom{position:fixed;left:0;right:0;bottom:0;z-index:45;background:#fff;border-top:1px solid var(--border);padding:10px 16px;display:none;gap:10px;box-shadow:0 -6px 20px rgba(15,23,42,.06)}
.bk-bottom .btn{flex:1 1 auto;min-height:50px}
.bk-bottom .btn-back{flex:0 0 auto;min-width:56px;padding-left:18px;padding-right:18px}
@media(max-width:959px){
  .bk-bottom{display:flex}
  .bk-actions{display:none}       /* mobile uses the sticky bottom bar */
  .bk-wrap{padding-bottom:96px}
}

/* ---- success screen ---- */
.bk-done{background:var(--card);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);padding:48px 32px;text-align:center;max-width:560px;margin:0 auto}
.bk-done .check{width:72px;height:72px;border-radius:9999px;background:#E7F6F0;color:var(--ok);display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.bk-done h2{font-size:1.5rem;font-weight:800}
.bk-done p{color:var(--muted);margin:12px auto 0;max-width:420px}

/* ---- submit loading (BloodScan logo pulse) ---- */
.bk-loading{display:inline-flex;align-items:center;gap:10px}
.bk-spin{width:18px;height:18px;border:2.5px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:9999px;animation:bk-rot .7s linear infinite}
@keyframes bk-rot{to{transform:rotate(360deg)}}

/* ---- footer (matches the main site) ---- */
.bk-footer{background:var(--navy);color:#cdd9e6;margin-top:40px}
.bk-footer .cols{max-width:1120px;margin:0 auto;padding:46px 30px;display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:28px}
.bk-footer .brand-col svg{height:26px;width:auto}
.bk-footer .copy{font-size:.8rem;color:#8ba3bf;margin-top:16px;line-height:1.6}
.bk-footer h4{color:#fff;font-size:.74rem;text-transform:uppercase;letter-spacing:.09em;margin:0 0 10px;font-family:var(--font-body);font-weight:700}
.bk-footer .lcol a{display:block;color:#cdd9e6;text-decoration:none;padding:6px 0;font-size:.92rem}
.bk-footer .lcol a:hover{color:#fff}
.bk-footer .contact-col .row{display:flex;align-items:center;gap:10px;margin-top:6px}
.bk-footer .contact-col a{color:#cdd9e6;text-decoration:none;font-size:.92rem}
.bk-footer .contact-col a:hover{color:#fff}
.bk-footer .contact-col svg{flex:0 0 auto}
@media(max-width:760px){.bk-footer .cols{grid-template-columns:1fr 1fr;gap:22px;padding:36px 22px}.bk-footer .brand-col{grid-column:1 / -1}}

.bk-hidden{display:none!important}