:root{
  --bg:#f5f7fb;--card:#fff;--text:#142033;--muted:#6b7280;--line:#e3e8ef;
  --accent:#2457d6;--accent-dark:#173da2;--accent-soft:#edf3ff;--success:#087443;
  --success-soft:#eaf8f0;--danger:#b42318;--danger-soft:#fff1f0;--shadow:0 18px 50px rgba(29,41,57,.08)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,#edf3ff 0,#f8f9fc 360px);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text)}
a{color:var(--accent)}button,input,select{font:inherit}.page-shell{width:min(1100px,calc(100% - 32px));margin:0 auto;padding:52px 0 34px}.page-shell.narrow{max-width:620px}.admin-shell{width:min(1180px,calc(100% - 32px))}
.hero{display:flex;align-items:flex-start;gap:18px;margin-bottom:28px;position:relative}.brand-mark{width:56px;height:56px;min-width:56px;border-radius:17px;background:linear-gradient(145deg,#2d63e5,#1f49bd);color:#fff;display:grid;place-items:center;font-size:20px;font-weight:900;box-shadow:0 10px 24px rgba(33,87,213,.25)}
.eyebrow,.step-label{margin:2px 0 7px;font-size:11px;font-weight:900;letter-spacing:.12em;color:var(--accent)}h1{font-size:clamp(36px,5vw,54px);line-height:1.02;margin:0 0 12px;letter-spacing:-.04em}h2{margin:0;font-size:22px;letter-spacing:-.02em}.subhead{max-width:760px;margin:0;color:var(--muted);font-size:17px;line-height:1.55}.muted{color:var(--muted)}.small{font-size:13px;line-height:1.45;margin:6px 0 0}
.card{background:rgba(255,255,255,.98);border:1px solid rgba(228,233,240,.95);border-radius:22px;padding:28px;box-shadow:var(--shadow)}.section-title,.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.booking-layout{display:flex;flex-direction:column;gap:20px}.choices-card,.details-card{padding:26px}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}
.field{display:flex;flex-direction:column;gap:8px}.field.full,.full{grid-column:1/-1}label{font-size:14px;font-weight:750}input,select{width:100%;border:1px solid #ccd5e1;border-radius:12px;padding:13px 14px;color:var(--text);background:#fff;outline:none;transition:.15s}input:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(36,87,214,.10)}
.primary-btn{border:0;border-radius:12px;background:var(--accent);color:#fff;font-weight:850;font-size:15px;padding:14px 19px;cursor:pointer;transition:.15s}.primary-btn:hover{background:var(--accent-dark);transform:translateY(-1px)}.primary-btn:active{transform:none}.danger-btn{border:1px solid #efb0aa;background:#fff;color:var(--danger);border-radius:9px;padding:8px 10px;font-weight:800;font-size:12px;cursor:pointer}.danger-btn:hover{background:var(--danger-soft)}
.notice{border-radius:14px;padding:14px 16px;margin-bottom:18px;font-weight:700}.notice.success{background:var(--success-soft);color:var(--success);border:1px solid #b9e8cd}.notice.error{background:var(--danger-soft);color:var(--danger);border:1px solid #f3c5c0}
.rates-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}.rate-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px 20px;box-shadow:0 8px 28px rgba(29,41,57,.05);display:flex;align-items:center;justify-content:space-between;gap:12px}.rate-card span{font-size:14px;font-weight:750;color:#475467}.rate-card strong{font-size:28px;color:var(--accent);letter-spacing:-.04em}.rate-card strong span{font-size:13px;color:var(--muted);margin-left:2px}
.info-banner{display:flex;gap:8px;align-items:flex-start;background:#f0f5ff;border:1px solid #d9e5ff;color:#304466;border-radius:16px;padding:15px 17px;margin-bottom:20px;font-size:14px;line-height:1.5}.info-banner strong{white-space:nowrap;color:#163d91}.inline-note{margin-top:16px;background:#fff8e7;border:1px solid #f6dfaa;border-radius:12px;padding:12px 14px;font-size:13px;line-height:1.45;color:#684b12}.hidden{display:none!important}
.calendar-card{padding:24px}.calendar-header{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:16px}.week-nav{display:flex;align-items:center;gap:10px;background:#f7f9fc;border:1px solid var(--line);border-radius:12px;padding:6px}.week-nav strong{min-width:120px;text-align:center;font-size:13px}.icon-btn{width:34px;height:34px;border:0;border-radius:9px;background:#fff;color:var(--text);font-size:24px;line-height:1;cursor:pointer;box-shadow:0 1px 3px rgba(16,24,40,.08)}.icon-btn:hover{background:var(--accent-soft);color:var(--accent)}
.calendar-message{background:#f8fafc;border:1px solid var(--line);border-radius:11px;padding:10px 13px;margin-bottom:12px;color:#566273;font-size:13px;font-weight:650}.calendar-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff}.booking-calendar{display:grid;min-width:790px}.cal-corner,.cal-day{position:sticky;top:0;z-index:2;background:#fbfcfe;border-bottom:1px solid var(--line);height:61px}.cal-corner{left:0;z-index:3;border-right:1px solid var(--line)}.cal-day{display:flex;flex-direction:column;align-items:center;justify-content:center;border-right:1px solid var(--line)}.cal-day span{font-size:11px;text-transform:uppercase;letter-spacing:.08em;font-weight:850;color:#98a2b3}.cal-day strong{font-size:18px;margin-top:2px}.cal-day.today{background:var(--accent-soft)}.cal-day.today strong{color:var(--accent)}
.cal-time{position:sticky;left:0;z-index:1;background:#fbfcfe;border-right:1px solid var(--line);border-bottom:1px solid #edf0f4;min-height:39px;display:flex;align-items:flex-start;justify-content:center;padding-top:5px;color:#8a94a4;font-size:10px;font-weight:700}.cal-slot{min-height:39px;border:0;border-right:1px solid #edf0f4;border-bottom:1px solid #edf0f4;background:#f7f8fa;position:relative;padding:0;cursor:default}.cal-slot.available{background:#f4fbf7;cursor:pointer}.cal-slot.available:hover{background:#dff6e9}.cal-slot.available span{display:block;width:8px;height:8px;border-radius:50%;background:#32a568;margin:auto}.cal-slot.selected{background:#dbe7ff!important;box-shadow:inset 0 0 0 2px var(--accent)}.cal-slot.selected span{background:var(--accent)}.cal-slot.past{background:#f7f7f8}.selection-summary{margin-top:14px;display:grid;grid-template-columns:1.8fr 1fr;gap:12px;background:#eff5ff;border:1px solid #d7e4ff;border-radius:14px;padding:14px 16px}.selection-summary div{display:flex;flex-direction:column;gap:3px}.selection-summary span{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:#75839a;font-weight:800}.selection-summary strong{font-size:14px;color:#1e3f85}
.booking-form{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.privacy-note{font-size:12px;color:var(--muted);margin-top:-2px}.booking-total{border:1px solid var(--line);border-radius:12px;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fbfcfe}.booking-total span{font-size:13px;color:var(--muted);font-weight:700}.booking-total strong{font-size:18px;color:var(--accent)}footer{text-align:center;color:#8d98a8;font-size:13px;line-height:1.7;padding:27px 0 0}
.modal-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.52);display:none;align-items:center;justify-content:center;padding:20px;z-index:100}.modal-backdrop.show{display:flex}.modal-card{width:min(480px,100%);background:#fff;border-radius:22px;padding:30px;text-align:center;box-shadow:0 30px 80px rgba(15,23,42,.25)}.modal-card h2{font-size:27px;margin-bottom:10px}.modal-card p{color:var(--muted);line-height:1.6;margin:0 0 22px}.success-check{width:54px;height:54px;margin:0 auto 16px;border-radius:50%;display:grid;place-items:center;background:var(--success-soft);color:var(--success);font-size:27px;font-weight:900}
.admin-hero{padding-right:90px}.logout{position:absolute;right:0;top:8px;font-weight:750;text-decoration:none}.admin-card{padding:24px}.availability-builder{margin-bottom:20px}.availability-form{display:grid;grid-template-columns:1.25fr 1fr 1fr auto;gap:14px;align-items:end;margin-top:20px}.admin-grid{display:grid;grid-template-columns:.85fr 1.35fr;gap:20px}.count{background:var(--accent-soft);color:var(--accent);font-weight:850;min-width:30px;height:30px;border-radius:15px;display:grid;place-items:center;font-size:13px}.item-list{display:flex;flex-direction:column;gap:12px;margin-top:18px}.list-item,.booking-item{border:1px solid var(--line);border-radius:14px;padding:14px}.list-item{display:flex;align-items:center;justify-content:space-between;gap:12px}.list-item strong,.booking-top strong{font-size:14px}.list-item span,.booking-meta{display:block;color:var(--muted);font-size:12px;margin-top:4px}.booking-item{display:flex;flex-direction:column;gap:12px}.booking-item.past{opacity:.62}.booking-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.status-pill{font-size:11px;font-weight:850;background:#ecfdf3;color:#087443;border-radius:10px;padding:4px 7px}.past .status-pill{background:#f2f4f7;color:#667085}dl{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:0}dl div{min-width:0}dt{font-size:10px;text-transform:uppercase;letter-spacing:.06em;font-weight:850;color:#98a2b3}dd{margin:3px 0 0;font-size:13px;word-break:break-word}.booking-item form{align-self:flex-start}.travel-note{font-size:12px;background:#fff8e7;color:#765516;border:1px solid #f4dda5;border-radius:10px;padding:9px 11px}
@media(max-width:820px){.admin-grid{grid-template-columns:1fr}.availability-form{grid-template-columns:1fr 1fr}.availability-form .field:first-of-type,.availability-form .primary-btn{grid-column:1/-1}.calendar-header{flex-direction:column}.week-nav{align-self:stretch;justify-content:space-between}.info-banner{flex-direction:column}.info-banner strong{white-space:normal}}
@media(max-width:620px){.page-shell{width:min(100% - 20px,1100px);padding-top:28px}.hero{gap:12px}.brand-mark{width:46px;height:46px;min-width:46px;border-radius:13px;font-size:17px}h1{font-size:35px}.subhead{font-size:15px}.card{padding:19px;border-radius:18px}.rates-grid,.choice-grid,.booking-form,.selection-summary{grid-template-columns:1fr}.rate-card{padding:14px 16px}.rate-card strong{font-size:24px}.calendar-card{padding:16px}.availability-form{grid-template-columns:1fr}.availability-form .field:first-of-type,.availability-form .primary-btn{grid-column:1}.admin-hero{padding-right:0;padding-bottom:30px}.logout{top:auto;bottom:0;left:58px;right:auto}dl{grid-template-columns:1fr}.list-item{align-items:flex-start;flex-direction:column}.list-item form,.list-item .danger-btn{width:100%}.booking-total{min-height:52px}.modal-card{padding:25px 20px}}

/* Multi-student booking additions */
.students-card{padding:26px}.booking-for-box{margin-top:20px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:#f7f9fc;border:1px solid var(--line);border-radius:14px;padding:10px 12px}.booking-for-box>span{font-size:13px;font-weight:800;color:#526071;margin-right:4px}.segment-option{position:relative;cursor:pointer}.segment-option input{position:absolute;opacity:0;pointer-events:none}.segment-option span{display:block;border:1px solid #d8dee8;background:#fff;border-radius:10px;padding:9px 13px;font-size:13px;font-weight:800;color:#526071;transition:.15s}.segment-option input:checked+span{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 4px 12px rgba(36,87,214,.18)}
.students-list{display:flex;flex-direction:column;gap:14px;margin-top:18px}.student-card{border:1px solid var(--line);border-radius:16px;padding:17px;background:#fbfcfe}.student-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.student-card-head strong{font-size:15px}.student-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}.secondary-btn{margin-top:14px;border:1px solid #b8c9ee;background:#f3f7ff;color:var(--accent);border-radius:11px;padding:10px 14px;font-weight:850;cursor:pointer}.secondary-btn:hover{background:#e8f0ff}.text-btn{border:0;background:transparent;color:var(--danger);font-weight:800;font-size:12px;cursor:pointer;padding:4px 0}.single-choice{grid-template-columns:minmax(260px,520px)}
@media(max-width:620px){.student-fields{grid-template-columns:1fr}.booking-for-box{align-items:stretch}.booking-for-box>span{width:100%}.segment-option{flex:1}.segment-option span{text-align:center}}