:root{--primary:#ffe000;--ink:#191309;--surface:#fff;--bg:#f5f5f2;--muted:#65635e;--danger:#b42335;--border:#e2e1dc;--soft:#fff8cc;--success:#146448;--warning:#815600;--radius:10px;--panel:18px;--space:16px;color-scheme:light;font-family:Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:16px}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,select{cursor:pointer}button{min-height:44px}button:disabled{cursor:not-allowed;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--primary);outline-offset:3px}h1,h2,h3,p{margin:0}h1{font-size:30px;letter-spacing:-1px;line-height:1.15}h2{font-size:20px;letter-spacing:-.4px}h3{font-size:16px}p{line-height:1.5}small{font-size:13px}a{color:var(--primary)}.skip{position:fixed;left:16px;top:-80px;z-index:99;background:white;padding:16px}.skip:focus{top:16px}.shell{display:grid;grid-template-columns:238px minmax(0,1fr);min-height:100vh}.sidebar{background:var(--ink);color:white;padding:30px 22px;display:flex;flex-direction:column;gap:30px}.brand{display:flex;align-items:center;gap:12px}.brandmark{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--primary);font-size:28px;font-weight:800}.brand strong{font-size:23px;letter-spacing:.6px}.brand small{display:block;color:var(--side-muted);margin-top:3px}.side-caption{text-transform:uppercase;letter-spacing:1px;color:var(--side-muted);font-size:12px;margin:0 0 12px}.role-select{width:100%;color:white;background:var(--side-control);border:1px solid var(--side-border);padding:12px;border-radius:var(--radius);min-height:46px;font-size:14px}.nav{display:grid;gap:6px}.nav button{display:flex;gap:12px;align-items:center;text-align:left;border:0;background:transparent;color:var(--side-muted);padding:13px 12px;border-radius:var(--radius);font-size:14px}.nav button.active{background:var(--side-active);color:white}.nav button:hover{background:var(--side-active)}.icon{width:20px;height:20px;flex-shrink:0;display:inline-block;vertical-align:middle}.sidebar-foot{margin-top:auto;color:var(--side-muted);font-size:13px;line-height:1.6}.sidebar-foot button{background:transparent;color:white;border:1px solid var(--side-border);border-radius:10px;padding:8px 12px;margin-top:10px;width:100%;font-size:14px}.main{padding:26px 38px 40px;max-width:1440px;width:100%;margin:auto}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:28px}.demo-tag{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-size:13px}.demo-tag span{background:var(--neutral);border:1px solid var(--border);border-radius:5px;padding:4px 7px;font-weight:700;font-size:11px;letter-spacing:.7px}.identity{display:flex;gap:10px;align-items:center;font-size:14px}.avatar{display:grid;place-items:center;flex-shrink:0;width:38px;height:38px;border-radius:50%;background:var(--neutral);color:var(--ink);font-size:13px;font-weight:700}.heading{display:flex;justify-content:space-between;align-items:flex-end;gap:18px;margin:0 0 26px}.eyebrow{text-transform:uppercase;letter-spacing:1.2px;font-size:12px;font-weight:700;color:var(--muted);margin-bottom:9px}.sub{color:var(--muted);font-size:14px;margin-top:10px;line-height:1.6}.badge{display:inline-flex;align-items:center;border-radius:6px;padding:6px 9px;line-height:1.25;font-size:12px;font-weight:700;white-space:normal;background:var(--soft);color:var(--primary)}.badge.green{background:var(--success-bg);color:var(--success)}.badge.red{background:var(--danger-bg);color:var(--danger)}.badge.amber{background:var(--warning-bg);color:var(--warning)}.grid{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px;align-items:start}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--panel);padding:24px;margin-bottom:20px}.panel:last-child{margin-bottom:0}.panel-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:22px}.panel-head h2{font-size:18px}.line{display:flex;align-items:center;justify-content:space-between;gap:12px}.person{display:flex;align-items:center;gap:12px}.person .avatar{width:48px;height:48px;font-size:16px;background:var(--soft);color:var(--primary)}.muted{color:var(--muted)}.car{font-size:13px;color:var(--muted);margin-top:5px}.days{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px;margin:24px 0}.day{background:white;border:1px solid var(--border);border-radius:12px;min-height:100px;padding:10px 3px;color:var(--ink);display:flex;flex-direction:column;gap:8px;align-items:center;justify-content:center}.day strong{font-size:25px;line-height:1}.day span{font-size:13px;color:var(--muted)}.day small{font-size:11px;color:var(--muted)}.day:hover{border-color:var(--primary)}.day.selected{background:var(--primary);border-color:var(--primary);color:white}.day.selected span,.day.selected small{color:white}.day.off{background:var(--bg)}.day.selected.off{background:var(--primary)}.slots{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}.slot{border:1px solid var(--border);background:white;border-radius:12px;padding:17px 14px;text-align:left;display:grid;gap:7px;min-height:83px;color:var(--ink)}.slot strong{font:600 19px Menlo,monospace;letter-spacing:-.8px}.slot span{font-size:12px;color:var(--muted)}.slot:hover:not(:disabled){border-color:var(--primary);background:var(--soft)}.slot.chosen{border:2px solid var(--primary);background:var(--soft);padding:16px 13px}.slot:disabled{opacity:.6;background:var(--bg)}.rule{display:flex;gap:10px;align-items:flex-start;margin-top:24px;font-size:13px;color:var(--muted);line-height:1.6}.rule .icon{margin-top:2px}.primary,.secondary,.danger,.quiet{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:var(--radius);font-weight:600;font-size:14px;padding:11px 16px;border:1px solid transparent;min-height:44px;text-decoration:none}.primary{background:var(--primary);color:white}.primary:hover{background:#f0cf00}.secondary{background:white;border-color:var(--border);color:var(--ink)}.secondary:hover{background:var(--bg);border-color:var(--muted)}.danger{background:var(--danger-bg);border-color:var(--danger-border);color:var(--danger)}.danger:hover{background:var(--danger-bg)}.quiet{background:transparent;color:var(--muted);border:0;padding:6px 9px}.full{width:100%}.booking-summary{background:var(--ink);color:white;border:0}.booking-summary .muted,.booking-summary .sub{color:var(--side-muted)}.booking-summary h2{font-size:18px}.summary-time{font:600 34px Menlo,monospace;letter-spacing:-1.8px;margin:24px 0 6px}.summary-data{display:grid;gap:14px;font-size:14px;margin:24px 0;border-top:1px solid var(--side-border);padding-top:20px}.summary-data div{display:flex;gap:10px;line-height:1.5}.summary-placeholder{padding:24px 0;color:var(--side-muted);font-size:14px;line-height:1.6}.metric{font-size:35px;font-weight:700;letter-spacing:-1px;margin:16px 0 5px}.progress{height:5px;background:var(--border);border-radius:4px;margin-top:18px}.progress>span{display:block;background:var(--primary);height:100%;border-radius:4px;width:28%}.upcoming{display:flex;gap:16px;align-items:flex-start;border-top:1px solid var(--border);padding:18px 0}.upcoming:first-child{border:0}.date-tile{width:52px;border-radius:10px;background:var(--soft);color:var(--primary);text-align:center;padding:9px 5px;flex-shrink:0}.date-tile strong{font-size:23px;display:block}.date-tile small{font-size:12px}.upcoming-body{flex:1;min-width:0}.upcoming-body strong{font:600 16px Menlo,monospace}.upcoming-body .sub{margin:5px 0 8px}.row-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.empty{padding:24px 12px;text-align:center;color:var(--muted);line-height:1.6;border:1px dashed var(--border);border-radius:12px}.empty h3{color:var(--ink);margin-bottom:8px}.empty p{font-size:14px}.stack{display:grid;gap:16px}.field{display:grid;gap:8px;font-size:14px;font-weight:600}.field input,.field select,.field textarea{padding:12px;border:1px solid var(--border);border-radius:var(--radius);min-height:44px;background:white;color:var(--ink);width:100%;font-weight:400}.field small{color:var(--muted);font-weight:400;line-height:1.5}.field textarea{min-height:90px;resize:vertical}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:14px}th{font-weight:600;color:var(--muted);background:var(--bg);padding:13px 15px;white-space:nowrap}td{padding:15px;border-bottom:1px solid var(--border);vertical-align:middle;line-height:1.4}td.time{font-family:Menlo,monospace;white-space:nowrap}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:24px}.stat{padding:20px;background:white;border:1px solid var(--border);border-radius:14px}.stat strong{font-size:27px;display:block;margin:8px 0 0}.stat span{font-size:13px;color:var(--muted)}.availability-row{display:grid;grid-template-columns:1fr 110px 110px;gap:12px;padding:14px 0;border-bottom:1px solid var(--border);align-items:center}.availability-row input[type=time]{padding:10px;border:1px solid var(--border);border-radius:8px;width:100%;font-size:14px}.availability-row label{display:flex;gap:10px;align-items:center;font-size:14px;min-height:44px}.availability-row input[type=checkbox]{width:18px;height:18px}.notice{background:var(--soft);border:1px solid var(--accent-border);padding:14px 16px;border-radius:10px;font-size:14px;line-height:1.6;margin:18px 0}.notice.warn{background:var(--warning-bg);border-color:var(--warning-border);color:var(--warning)}.notice.error{background:var(--danger-bg);border-color:var(--danger-border);color:var(--danger)}.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.toolbar select,.toolbar input{padding:11px;border:1px solid var(--border);border-radius:10px;min-height:44px;background:white;color:var(--ink);font-size:14px}.timeline{display:grid;gap:0}.event{padding:18px 0;border-bottom:1px solid var(--border);display:grid;gap:7px}.event p{font-size:14px}.event .line{font-size:12px;color:var(--muted)}.help-list{display:grid;gap:16px;font-size:14px;line-height:1.6}.help-list div{display:flex;gap:12px}.help-list .icon{color:var(--primary);flex-shrink:0}.details-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}.details-grid dt{font-size:13px;color:var(--muted);margin-bottom:7px}.details-grid dd{margin:0;font-size:15px}dialog{width:min(520px,calc(100vw - 32px));padding:28px;border:1px solid var(--border);border-radius:20px;color:var(--ink);box-shadow:0 24px 100px #18264138;max-height:90vh;overflow:auto}dialog::backdrop{background:#101d39a8;backdrop-filter:blur(3px)}dialog h2{margin-bottom:14px;font-size:24px}dialog p{color:var(--muted);font-size:14px;line-height:1.7}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.dialog-close{float:right;border:0;background:var(--bg);border-radius:8px;width:36px;min-height:36px;color:var(--muted);margin:-10px -10px 0 12px}.form-error{color:var(--danger);font-size:14px;line-height:1.6;margin-top:14px}#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);max-width:calc(100% - 32px);border-radius:12px;background:var(--ink);color:white;font-size:14px;padding:15px 22px;box-shadow:0 8px 35px #18264125;z-index:100;display:none}#toast.show{display:block}.week-title{font-size:14px;white-space:nowrap;font-weight:600}.section-foot{font-size:12px;color:var(--muted);margin-top:25px;line-height:1.6}.small-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px}.small-head h3{font-size:14px}.list-student{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px 0;border-bottom:1px solid var(--border)}.tabs{display:flex;gap:8px;margin:0 0 20px}.tabs button{border:1px solid var(--border);background:white;border-radius:10px;padding:10px 15px;font-size:14px}.tabs button.active{background:var(--soft);color:var(--primary);border-color:var(--primary)}@media(max-width:1150px){.main{padding:24px}.grid{grid-template-columns:minmax(0,1fr) 260px;gap:16px}.panel{padding:20px}.shell{grid-template-columns:210px minmax(0,1fr)}.sidebar{padding:26px 16px}.slots{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:950px){.grid{grid-template-columns:1fr}.aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}.aside .panel{margin-bottom:0}.days{gap:5px}.day strong{font-size:23px}.day small{font-size:10px}}@media(max-width:800px){.shell{display:block}.sidebar{padding:18px 20px;gap:18px}.brand strong{font-size:20px}.brandmark{width:36px;height:36px;font-size:24px}.sidebar .brand small{font-size:11px}.side-caption,.sidebar-foot{display:none}.sidebar-top{display:flex;justify-content:space-between;align-items:center;gap:16px}.role-block{max-width:200px}.role-select{min-height:44px;padding:9px;font-size:13px}.nav{display:flex;gap:5px;overflow-x:auto}.nav button{white-space:nowrap;padding:10px 12px;font-size:13px;gap:7px}.nav .icon{width:18px;height:18px}.main{padding:20px}.topbar{padding-bottom:22px}.topbar .identity{font-size:12px}.topbar .avatar{width:32px;height:32px}.heading{margin-bottom:22px}.heading h1{font-size:27px}.slots{grid-template-columns:repeat(3,minmax(0,1fr))}.sidebar-mobile-demo{display:block!important}.stats{gap:10px}.stat{padding:15px}.stat strong{font-size:23px}}@media(max-width:520px){.main{padding:18px 14px 32px}.sidebar{padding:16px 14px}.brand{gap:8px}.brand strong{font-size:18px}.role-block{max-width:165px}.role-select{font-size:12px}.topbar{align-items:start}.topbar .identity>span{display:none}.demo-tag{font-size:12px;gap:6px}.heading{align-items:start}.heading h1{font-size:26px}.heading .badge{max-width:120px;font-size:11px}.panel{padding:18px;border-radius:14px}.days{margin:20px 0;gap:4px}.day{min-height:86px;border-radius:9px;gap:8px}.day strong{font-size:21px}.day span{font-size:11px}.day small{display:none}.slots{grid-template-columns:repeat(2,minmax(0,1fr))}.slot strong{font-size:18px}.aside{display:block}.aside .panel{margin-bottom:16px}.form-row{grid-template-columns:1fr}.stats{grid-template-columns:repeat(3,minmax(0,1fr))}.stat span{font-size:11px}.stat{padding:12px}.stat strong{font-size:23px}.availability-row{grid-template-columns:1fr 90px 90px;gap:7px}.availability-row label{font-size:13px}.toolbar{gap:8px}.toolbar select,.toolbar input{max-width:100%}.details-grid{grid-template-columns:1fr}.nav button{font-size:12px}.nav .icon{display:none}.dialog-actions{flex-wrap:wrap}dialog{padding:23px}.upcoming{gap:12px}.week-title{font-size:12px}.panel-head{flex-wrap:wrap}}@media(prefers-reduced-motion:no-preference){button,a{transition:background .16s,border-color .16s}dialog[open]{animation:appear .15s ease-out}@keyframes appear{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}}

/* Brand and themes: all roles share the same semantic palette. */
:root{--accent-text:#5b4b00;--on-primary:#191309;--neutral:#efefeb;--accent-border:#e5ce67;--success-bg:#e6f5ee;--danger-bg:#fff0f3;--danger-border:#edbac5;--warning-bg:#fff6e5;--warning-border:#efd6a4;--side-bg:#191714;--side-muted:#cecbc3;--side-control:#2b2823;--side-border:#514b41;--side-active:#383329;--summary-bg:#191714;--summary-text:#ffffff;--input-bg:#ffffff}
:root[data-theme=dark]{color-scheme:dark;--ink:#f4f2eb;--surface:#23221f;--bg:#161614;--muted:#b4b1a7;--border:#414039;--soft:#353018;--accent-text:#ffe000;--neutral:#32312c;--accent-border:#756527;--success:#a5dfbd;--success-bg:#1e392b;--danger:#ffb4be;--danger-bg:#3c2329;--danger-border:#70444d;--warning:#ead29a;--warning-bg:#383020;--warning-border:#6e5c35;--side-bg:#10100f;--side-muted:#c6c2b6;--side-control:#24231f;--side-border:#48463e;--side-active:#36311e;--summary-bg:#292619;--summary-text:#f4f2eb;--input-bg:#2a2925}
.sidebar{background:var(--side-bg);border-right:1px solid var(--side-border)}
.brand{height:78px;width:100%;overflow:hidden;background:#fff;border-radius:8px;display:block;margin-bottom:8px}
.brand img{width:100%;height:100%;object-fit:cover;object-position:center;display:block}
.nav button.active{color:#ffe000;box-shadow:inset 3px 0 #ffe000}
.side-caption{line-height:1.5}
h1{font-weight:800;letter-spacing:-1.1px}h1:after{content:'';display:block;width:44px;height:4px;background:var(--primary);margin-top:13px;transform:skewX(-20deg)}
.day,.slot,.secondary,.tabs button{background:var(--surface);color:var(--ink)}
.day.selected,.day.selected span,.day.selected small,.primary{color:var(--on-primary)}
.slot.chosen{border-color:var(--primary);box-shadow:inset 0 0 0 1px var(--primary)}
.badge,.person .avatar,.date-tile,.tabs button.active{color:var(--accent-text)}
.avatar{color:var(--ink)}
.booking-summary{background:var(--summary-bg);color:var(--summary-text);border-top:4px solid var(--primary)}
.booking-summary .muted,.booking-summary .sub,.summary-placeholder{color:var(--side-muted)}
.help-list .icon{color:var(--accent-text)}
.field input,.field select,.field textarea,.availability-row input[type=time],.toolbar select,.toolbar input{background:var(--input-bg);color:var(--ink);border-color:var(--border)}
input[type=checkbox]{accent-color:#927c00}.availability-row input[type=checkbox]{accent-color:#927c00}
.notice{color:var(--ink)}
dialog{background:var(--surface)}.dialog-close{color:var(--ink)}
#toast{background:var(--summary-bg);color:var(--summary-text);border:1px solid var(--side-border)}
a{color:var(--accent-text)}.skip{background:var(--surface)}
.theme-toggle{white-space:nowrap;font-size:13px;padding:8px 11px}.theme-toggle .icon{width:18px;height:18px}
@media(max-width:800px){.sidebar{border-right:0;border-bottom:1px solid var(--side-border)}.brand{width:180px;height:60px;margin:0}.sidebar-top{gap:12px}.theme-label{display:none}.theme-toggle{width:44px;padding:10px}.identity{gap:6px}}
@media(max-width:520px){.brand{width:155px;height:52px}.role-block{max-width:145px}.demo-tag{font-size:11px}.topbar .identity{gap:3px}.topbar .quiet{padding:6px}.topbar{gap:4px}}

.stat{background:var(--surface)}

.registration-panel{margin-bottom:24px}.registration-panel .panel-head{flex-wrap:wrap;gap:16px}.registration-panel .row-actions{flex-wrap:wrap}