:root {
  color-scheme: light;
  --jb-blue: #006FCF;
  --jb-blue-hover: #005BB5;
  --jb-navy: #00175A;
  --jb-bg: #F5F7FA;
  --jb-card: #FFFFFF;
  --jb-border: #C8C8C8;
  --jb-text: #00175A;
  --jb-muted: #5A6478;
  --jb-accent: #006FCF;
  --jb-accent-soft: rgba(0, 133, 124, 0.14);
  --jb-available: #00857C;
  --jb-available-border: rgba(0, 133, 124, 0.45);
  --jb-booked: rgba(196, 154, 60, 0.22);
  --jb-booked-text: #8B6914;
  --jb-na: #E8E8E8;
  --jb-na-text: #7A7A7A;
  --jb-shadow: 0 2px 10px rgba(0, 23, 90, 0.07);
  --jb-radius: 12px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

body.jb-page {
  margin: 0;
  min-height: 100dvh;
  background: var(--jb-bg);
  color: var(--jb-text);
  line-height: 1.45;
}

body.jb-modal-open { overflow: hidden; }

.jb-shell {
  max-width: 960px;
  margin: 0 auto;
  padding: max(20px, env(safe-area-inset-top)) 20px max(28px, env(safe-area-inset-bottom));
}

.jb-header h1 {
  margin: 0 0 4px;
  font-size: clamp(1.35rem, 4vw, 1.75rem);
  color: var(--jb-navy);
  font-weight: 700;
}
.jb-sub, .jb-hint { margin: 0; color: var(--jb-muted); font-size: 0.875rem; }

.jb-card {
  background: var(--jb-card);
  border: 1px solid var(--jb-border);
  border-radius: var(--jb-radius);
  padding: 18px;
  box-shadow: var(--jb-shadow);
}

.jb-banner { margin: 16px 0; }
.jb-banner--error { border-color: rgba(220, 38, 38, 0.45); background: #FEF2F2; }

.jb-layout {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

@media (min-width: 720px) {
  .jb-layout { grid-template-columns: 220px 1fr; align-items: start; }
}

.jb-legend h2 { margin: 0 0 12px; font-size: 1rem; color: var(--jb-navy); }
.jb-legend p { margin: 0 0 10px; font-size: 0.875rem; }

.jb-pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-right: 6px;
}
.jb-pill--available { background: var(--jb-accent-soft); color: #006B63; border: 1px solid var(--jb-available-border); }
.jb-pill--booked { background: var(--jb-booked); color: var(--jb-booked-text); border: 1px solid rgba(196, 154, 60, 0.35); }
.jb-pill--na { background: var(--jb-na); color: var(--jb-na-text); border: 1px solid var(--jb-border); }

.jb-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.jb-nav__month { margin: 0; font-size: 1.1rem; font-weight: 700; color: var(--jb-navy); }
.jb-nav__controls { display: flex; gap: 8px; flex-wrap: wrap; }
.jb-nav__btn {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--jb-border);
  background: var(--jb-card);
  color: var(--jb-navy);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background 0.15s, border-color 0.15s;
}
.jb-nav__btn:hover { background: #EEF2F7; border-color: #A8A8A8; }
.jb-nav__btn--today { border-color: var(--jb-blue); color: var(--jb-blue); background: rgba(0, 111, 207, 0.06); }

.jb-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 4px;
  text-align: center;
  font-size: 0.7rem;
  color: var(--jb-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.jb-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.jb-day {
  aspect-ratio: 1;
  min-height: 52px;
  border: 1px solid var(--jb-border);
  border-radius: 8px;
  background: var(--jb-na);
  color: var(--jb-text);
  padding: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font: inherit;
  cursor: default;
}
.jb-day--outside { opacity: 0.4; }
.jb-day--available { background: var(--jb-accent-soft); border-color: var(--jb-available-border); color: var(--jb-navy); }
.jb-day--booked { background: var(--jb-booked); border-color: rgba(196, 154, 60, 0.35); }
.jb-day--clickable { cursor: pointer; }
.jb-day--clickable:hover { filter: brightness(0.97); box-shadow: 0 1px 4px rgba(0, 23, 90, 0.1); }
.jb-day:disabled { opacity: 0.65; }
.jb-day__num { font-weight: 700; font-size: 0.95rem; }
.jb-day__badge { font-size: 0.55rem; text-transform: uppercase; letter-spacing: 0.02em; color: var(--jb-muted); }

.jb-empty { margin-bottom: 16px; }

.jb-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.jb-modal[hidden] { display: none; }
.jb-modal__backdrop { position: absolute; inset: 0; background: rgba(0, 23, 90, 0.45); }
.jb-modal__sheet {
  position: relative;
  width: min(100%, 440px);
  max-height: 92dvh;
  overflow: auto;
  background: var(--jb-card);
  border: 1px solid var(--jb-border);
  border-radius: var(--jb-radius) var(--jb-radius) 0 0;
  padding: 22px 18px max(22px, env(safe-area-inset-bottom));
  box-shadow: 0 -4px 24px rgba(0, 23, 90, 0.12);
}
.jb-modal__sheet h2 { color: var(--jb-navy); margin: 0 0 4px; }
@media (min-width: 520px) {
  .jb-modal { align-items: center; }
  .jb-modal__sheet { border-radius: var(--jb-radius); margin: 16px; }
}

.jb-modal__date { margin: 0 0 16px; color: var(--jb-muted); font-size: 0.9rem; }

.jb-form label { display: block; margin: 12px 0 4px; font-size: 0.85rem; font-weight: 600; color: var(--jb-navy); }
.jb-form input,
.jb-form textarea,
.jb-form select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--jb-border);
  background: #FAFBFC;
  color: var(--jb-text);
  font: inherit;
}
.jb-form input:focus,
.jb-form textarea:focus,
.jb-form select:focus {
  outline: 2px solid rgba(0, 111, 207, 0.35);
  outline-offset: 1px;
  border-color: var(--jb-blue);
}
.jb-form__actions { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.jb-btn {
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--jb-border);
  background: var(--jb-card);
  color: var(--jb-navy);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.jb-btn:hover { background: #EEF2F7; }
.jb-btn--primary {
  background: var(--jb-blue);
  border-color: var(--jb-blue);
  color: #fff;
  font-weight: 600;
}
.jb-btn--primary:hover { background: var(--jb-blue-hover); border-color: var(--jb-blue-hover); }
.jb-hp { position: absolute; left: -9999px; height: 0; width: 0; overflow: hidden; }

.jb-alert { padding: 10px 12px; border-radius: 8px; margin-bottom: 12px; font-size: 0.875rem; }
.jb-alert--error { background: #FEF2F2; border: 1px solid rgba(220, 38, 38, 0.35); color: #991B1B; }
.jb-alert--ok { background: rgba(0, 133, 124, 0.1); border: 1px solid rgba(0, 133, 124, 0.35); color: #006B63; }

.jb-footer {
  margin-top: 24px;
  padding-top: 14px;
  border-top: 1px solid var(--jb-border);
  text-align: center;
  font-size: 0.8rem;
}
.jb-footer a {
  color: var(--jb-muted);
  text-decoration: none;
  font-weight: 600;
}
.jb-footer a:hover { color: var(--jb-blue); text-decoration: underline; }
.jb-footer__sep { margin: 0 8px; color: var(--jb-border); }