/* ============================================================
   Vertbits Lab — booking app (book.vertbits.com)
   Self-contained, brand-matched dark UI.
   ============================================================ */
:root{
  --bg:#080c16;--bg-card:#111827;--bg-surface:#1a2035;
  --border:rgba(255,255,255,.08);--border-hover:rgba(255,255,255,.2);
  --text:#e2e8f0;--text-2:#94a3b8;--text-mut:#5b6b82;
  --accent:#00e5c7;--accent-2:#00c9ae;--on-accent:#042b25;--glow:rgba(0,229,199,.45);
  --danger:#ef4444;
  --font:'Inter',system-ui,sans-serif;--mono:'JetBrains Mono',monospace;--disp:'Space Grotesk',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;position:relative;z-index:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font:inherit}
::selection{background:var(--accent);color:var(--bg)}

.bg{position:fixed;inset:-25%;z-index:-1;pointer-events:none;
  background:radial-gradient(closest-side,rgba(0,229,199,.08),transparent 70%) 18% 16%/60% 60% no-repeat,
            radial-gradient(closest-side,rgba(251,40,75,.12),transparent 70%) 84% 86%/56% 56% no-repeat;
  animation:drift 30s ease-in-out infinite alternate}
@keyframes drift{from{transform:translate3d(-2%,-1%,0) scale(1.05)}to{transform:translate3d(2%,2.5%,0) scale(1.08)}}

/* --- nav --- */
.bk-nav{display:flex;align-items:center;justify-content:space-between;padding:20px clamp(20px,5vw,48px);max-width:1180px;margin:0 auto}
.bk-brand{display:flex;align-items:center;gap:10px}
.bk-brand img{height:34px}
.bk-brand span{font-family:var(--disp);font-weight:700;text-transform:uppercase;letter-spacing:1px;font-size:17px}
.bk-back{font-family:var(--mono);font-size:13px;color:var(--text-2);transition:color .2s}
.bk-back:hover{color:var(--accent)}

/* --- layout --- */
.bk-wrap{max-width:1180px;margin:0 auto;padding:20px clamp(20px,5vw,48px) 80px}
.bk-grid{display:grid;grid-template-columns:0.85fr 1.15fr;gap:clamp(28px,4vw,56px);align-items:start}

/* --- aside --- */
.bk-aside{position:sticky;top:24px}
.bk-kicker{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;letter-spacing:2.5px;text-transform:uppercase;color:var(--accent)}
.bk-kicker::before{content:'';width:26px;height:1.5px;background:var(--accent)}
.bk-aside h1{font-family:var(--disp);font-weight:600;font-size:clamp(30px,4vw,44px);letter-spacing:-1.4px;line-height:1.08;margin:16px 0 14px}
.bk-aside h1 em{font-style:normal;color:var(--accent)}
.bk-aside>p{color:var(--text-2);font-size:15.5px;line-height:1.75;max-width:420px}
.bk-points{list-style:none;margin:22px 0 0}
.bk-points li{position:relative;padding:7px 0 7px 26px;color:var(--text-2);font-size:14.5px}
.bk-points li::before{content:'✓';position:absolute;left:0;color:var(--accent);font-weight:700}
.bk-mascot{width:clamp(220px,26vw,330px);height:auto;margin-top:24px;filter:drop-shadow(0 26px 54px rgba(251,40,75,.3));animation:float 7s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* --- card --- */
.bk-card{background:var(--bg-card);border:1px solid var(--border);border-radius:22px;padding:clamp(24px,3vw,38px);position:relative;overflow:hidden}
.bk-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--accent),transparent)}
.bk-step{margin-bottom:26px}
.bk-label{display:flex;align-items:center;gap:10px;font-family:var(--disp);font-weight:600;font-size:16px;margin-bottom:14px}
.bk-num{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;background:var(--accent);color:var(--on-accent);font-family:var(--mono);font-size:12px;font-weight:700;flex:0 0 auto}
.req{color:var(--danger);font-family:var(--mono)}

select,input,textarea{width:100%;background:var(--bg-surface);border:1px solid var(--border);border-radius:12px;padding:14px 16px;color:var(--text);font-size:15px;outline:none;transition:border-color .2s,box-shadow .2s}
select:focus,input:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,229,199,.12)}
input::placeholder,textarea::placeholder{color:var(--text-mut)}
input.bad,textarea.bad,select.bad{border-color:var(--danger)}
textarea{resize:vertical;min-height:84px}

/* --- date picker --- */
.bk-month{font-family:var(--mono);font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:var(--text-mut);margin:8px 0 10px}
.bk-dates{display:grid;grid-template-columns:repeat(auto-fill,minmax(62px,1fr));gap:8px;margin-bottom:8px}
.bk-date{display:flex;flex-direction:column;align-items:center;gap:2px;padding:11px 6px;border:1px solid var(--border);border-radius:12px;background:var(--bg-surface);transition:border-color .2s,transform .15s,background .2s}
.bk-date:hover{border-color:var(--border-hover);transform:translateY(-2px)}
.bk-date.sel{border-color:var(--accent);background:rgba(0,229,199,.12)}
.bk-date .dow{font-family:var(--mono);font-size:10.5px;color:var(--text-mut);text-transform:uppercase}
.bk-date.sel .dow{color:var(--accent)}
.bk-date .dn{font-family:var(--disp);font-weight:600;font-size:19px}

/* --- preferred time (free choice) --- */
.bk-timepick{display:flex;flex-direction:column;gap:10px}
.bk-timepick input[type=time]{max-width:220px;font-family:var(--mono);font-size:16px;letter-spacing:1px;color-scheme:dark}
.bk-time-help{font-size:12.5px;color:var(--text-mut);line-height:1.5}

.bk-fields{display:flex;flex-direction:column;gap:12px}

.bk-selected{font-family:var(--mono);font-size:13.5px;color:var(--accent);background:rgba(0,229,199,.08);border:1px solid rgba(0,229,199,.25);border-radius:10px;padding:12px 16px;margin-bottom:16px}
.bk-error{font-family:var(--mono);font-size:13px;color:#fca5a5;background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);border-radius:10px;padding:11px 15px;margin-bottom:16px}
.bk-empty{color:var(--text-2);font-size:14px}
.bk-empty a{color:var(--accent)}

.bk-submit{width:100%;padding:16px;border-radius:999px;background:linear-gradient(180deg,var(--accent),var(--accent-2));color:var(--on-accent);font-family:var(--mono);font-weight:600;font-size:15px;letter-spacing:.5px;transition:transform .15s,box-shadow .2s;box-shadow:0 12px 32px -12px var(--glow)}
.bk-submit:hover{transform:translateY(-2px);box-shadow:0 18px 44px -14px var(--glow)}
.bk-submit:disabled{opacity:.6;cursor:wait;transform:none}

/* --- success --- */
.bk-done{text-align:center;padding:30px 10px}
.bk-done__tick{width:64px;height:64px;border-radius:50%;background:rgba(0,229,199,.14);border:2px solid var(--accent);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:30px;margin:0 auto 20px;animation:pop .5s cubic-bezier(.34,1.56,.64,1)}
@keyframes pop{from{transform:scale(0)}to{transform:scale(1)}}
.bk-done h2{font-family:var(--disp);font-weight:600;font-size:26px;letter-spacing:-.6px;margin-bottom:10px}
.bk-done p{color:var(--text-2);font-size:15px;max-width:380px;margin:0 auto 24px;line-height:1.7}
.bk-back2{display:inline-block;font-family:var(--mono);font-size:13px;color:var(--accent);border:1px solid var(--accent);border-radius:999px;padding:11px 26px;transition:background .2s,color .2s}
.bk-back2:hover{background:var(--accent);color:var(--on-accent)}

@media(max-width:880px){
  .bk-grid{grid-template-columns:1fr;gap:28px}
  .bk-aside{position:static}
  .bk-mascot{display:none}
}