:root{
  --bg:#f4f7fb;
  --ink:#10223d;
  --muted:#5f6c80;
  --card:#ffffff;
  --line:#e5eaf2;
  --brand:#1f4b99;
  --brand-soft:#e9f0ff;
  --accent:#7bd4c4;
  --accent-soft:#e8faf6;
  --warn:#ffdfbf;
  --shadow:0 18px 50px rgba(16,34,61,.08);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
body{font-family:Inter,Segoe UI,Arial,sans-serif;background:linear-gradient(180deg,#f8fbff 0%,var(--bg) 100%);color:var(--ink)}
a{color:inherit}
.container{max-width:1320px}

.site-topbar{
  background:#000 !important;
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);
  position:sticky;
  top:0;
  z-index:20;
}

.site-topbar-inner{display:flex;align-items:center;justify-content:space-between;padding:18px 28px;gap:20px}
.brand-wrap{display:flex;align-items:center;flex-shrink:0}
.brand-logo{display:block;max-height:48px;max-width:none;object-fit:contain}
.top-links{display:flex;align-items:center;gap:28px;font-size:13px;font-weight:700;text-transform:uppercase}
.top-links a{text-decoration:none;color:#fff;opacity:.9}
.top-links a.active,.top-links a:hover{color:var(--accent)}
.login-pill{display:inline-flex;align-items:center;justify-content:center;background:#b2f1ee;color:#a56a3f !important;padding:8px 16px;border-radius:6px;border:1px solid rgba(255,255,255,.22);text-transform:none;letter-spacing:0;font-weight:500;line-height:1.1;box-shadow:inset 0 1px 0 rgba(255,255,255,.45)}
.login-pill:hover{background:#a6ece8;color:#8f5935 !important;border-color:#d7fbf7}
.page-shell{min-height:calc(100vh - 90px)}
.page-heading{font-size:50px;line-height:1.05;font-weight:900;letter-spacing:-.04em;color:var(--ink)}
.card-surface,.white-panel,.auth-card,.mini-item,.timeline-item,.stat-card,.feature-card,.booking-hero,.tutor-card,.booking-modal-card{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow)}
.card-surface,.white-panel{border-radius:28px}
.card-surface{overflow:hidden}
.white-panel{overflow:hidden}
.section-title{font-weight:900;color:var(--ink);font-size:26px;letter-spacing:-.02em}
.section-text{color:var(--muted);font-size:16px;line-height:1.5}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:12px;font-weight:900;color:#7d8aa2}
.badge-soft,.tag-pill,.stat-chip,.badge{border-radius:999px}
.badge-soft{background:var(--brand-soft);color:var(--brand);padding:8px 12px;font-weight:800}
.stat-chip{display:flex;flex-direction:column;gap:2px;padding:16px 18px;background:rgba(255,255,255,.8);border:1px solid rgba(16,34,61,.08);min-width:120px}
.stat-chip span{font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);font-weight:800}
.stat-chip strong{font-size:24px;line-height:1}
.booking-hero{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:28px 30px}
.booking-hero-stats{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.display-title{font-size:42px;line-height:1.05;font-weight:900;letter-spacing:-.04em}
.grid-2,.grid-3,.grid-4{display:grid;gap:24px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width: 1100px){.grid-2,.grid-3,.grid-4,.booking-hero{grid-template-columns:1fr;display:grid}.booking-hero-stats{justify-content:flex-start}.page-heading,.display-title{font-size:38px}.site-topbar-inner{padding:14px 18px}}
@media (max-width: 768px){.site-topbar-inner{flex-direction:column;align-items:flex-start}.top-links{flex-wrap:wrap;gap:16px}.page-heading,.display-title{font-size:32px}.booking-hero{padding:22px}}
.form-control,.form-select{border-radius:16px;border-color:#d7dfeb;padding:12px 14px;background:#fff}
.form-control:focus,.form-select:focus{border-color:rgba(123,212,196,.9);box-shadow:0 0 0 .25rem rgba(123,212,196,.18)}
.btn-primary-med{background:var(--brand);border:0;color:#fff;padding:13px 22px;border-radius:14px;font-weight:800}
.btn-primary-med:hover{background:#15397a;color:#fff}
.btn-soft-med{background:var(--accent);border:0;color:#13464a;padding:13px 22px;border-radius:14px;font-weight:800}
.btn-soft-med:hover{background:#63cab8}
.alert{border-radius:18px}
.mini-list,.teaching-areas,.tutor-cards,.stack-gap{display:flex;flex-direction:column;gap:14px}
.mini-item{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:15px 16px;border-radius:18px}
.mini-item strong{display:block;color:var(--ink)}
.mini-item span{display:block;color:var(--muted);font-size:14px}
.subject-panel{background:#f9fbff;border:1px solid var(--line);border-radius:22px;padding:16px}
.subject-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.subject-check{display:flex;align-items:center;gap:10px;padding:12px 14px;background:#fff;border:1px solid var(--line);border-radius:16px;font-weight:700;color:var(--ink)}
.subject-check input{width:18px;height:18px}
.area-group{padding:16px;border-radius:20px;background:#f8fbff;border:1px solid var(--line)}
.area-heading{font-weight:900;font-size:14px;text-transform:uppercase;letter-spacing:.12em;color:#66748d;margin-bottom:10px}
.area-chips{display:flex;flex-wrap:wrap;gap:8px}
.tag-pill{display:inline-flex;align-items:center;padding:8px 12px;background:var(--brand-soft);color:var(--brand);font-weight:800;font-size:13px}
.booking-calendar-panel{min-height:740px}
.calendar-legend{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:14px}.calendar-legend span{display:flex;align-items:center;gap:8px}
.legend-dot{display:inline-block;width:10px;height:10px;border-radius:999px}.legend-open{background:var(--accent)}.legend-booked{background:#8aa4d6}
#bookingCalendar{font-size:14px}
.fc{--fc-border-color:var(--line);--fc-page-bg-color:transparent;--fc-neutral-bg-color:#fff;--fc-today-bg-color:rgba(123,212,196,.12)}
.fc .fc-toolbar-title{font-size:24px;color:var(--ink);font-weight:900}
.fc .fc-button-primary{background:var(--brand);border-color:var(--brand);border-radius:999px;padding:.5rem .95rem;font-weight:800}
.fc .fc-button-primary:hover{background:#15397a;border-color:#15397a}
.fc .fc-daygrid-event{border:0;border-radius:14px;overflow:hidden}
.slot-event{border-radius:14px;padding:2px}
.slot-event .fc-event-main{padding:0}
.slot-event.available .fc-event-main{background:linear-gradient(135deg, rgba(123,212,196,.32), rgba(31,75,153,.15));color:var(--ink)}
.slot-event.booked .fc-event-main{background:linear-gradient(135deg, rgba(137,158,217,.28), rgba(31,75,153,.12));color:var(--ink)}
.planner-event .fc-event-main{border-radius:14px}
.planner-event-booking .fc-event-main{background:linear-gradient(135deg, rgba(31,75,153,.18), rgba(123,212,196,.14));color:var(--ink)}
.planner-event-booking.tutor .fc-event-main{background:linear-gradient(135deg, rgba(31,75,153,.20), rgba(123,212,196,.18));}
.planner-event-booking.tutee .fc-event-main,.planner-event-booking.parent .fc-event-main{background:linear-gradient(135deg, rgba(88,119,199,.20), rgba(183,201,255,.30));}
.planner-event-personal .fc-event-main{color:#1a2435}
.planner-event-home .fc-event-main{background:linear-gradient(135deg, rgba(123,212,196,.35), rgba(123,212,196,.16));}
.planner-event-exam .fc-event-main{background:linear-gradient(135deg, rgba(255,223,191,.95), rgba(255,206,147,.42));}
.planner-event-appointment .fc-event-main{background:linear-gradient(135deg, rgba(189,210,255,.85), rgba(140,170,255,.30));}
.planner-event-revision .fc-event-main{background:linear-gradient(135deg, rgba(214,194,255,.85), rgba(173,145,255,.30));}
.planner-event-work .fc-event-main{background:linear-gradient(135deg, rgba(255,228,164,.85), rgba(255,196,102,.32));}
.planner-event-other .fc-event-main{background:linear-gradient(135deg, rgba(232,238,248,.95), rgba(204,214,230,.65));}
.calendar-event-content{display:flex;flex-direction:column;gap:2px;padding:6px 8px}
.calendar-event-title{font-weight:900;font-size:12px;line-height:1.2;white-space:normal}
.calendar-event-subtitle{font-size:11px;opacity:.88;white-space:normal}
.slot-popover{position:absolute;z-index:1000;max-width:360px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px;box-shadow:var(--shadow);pointer-events:none}
.planner-legend{display:flex;gap:10px;flex-wrap:wrap}
.planner-legend .legend-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:13px;font-weight:800;color:var(--ink)}
.planner-legend .legend-dot{background:var(--accent)}
.popover-photo-row{display:flex;gap:12px;align-items:center;margin-bottom:10px}
.popover-photo,.booking-modal-photo,.tutor-photo{flex-shrink:0;display:grid;place-items:center;overflow:hidden;border-radius:18px;background:linear-gradient(135deg,var(--brand-soft),var(--accent-soft));border:1px solid var(--line)}
.popover-photo{width:58px;height:58px}
.popover-photo img,.booking-modal-photo img,.tutor-photo img{width:100%;height:100%;object-fit:cover;display:block}
.popover-photo span,.booking-modal-photo span,.tutor-photo span{font-weight:900;color:var(--brand)}
.popover-meta{margin-top:6px;color:var(--ink);font-size:14px}
.booking-filters{margin-top:6px}
.tutor-cards{gap:12px}
.tutor-card{display:flex;gap:14px;padding:14px;border-radius:22px;align-items:center}
.tutor-photo{width:64px;height:64px}
.tutor-photo span{font-size:18px}
.booking-modal-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.booking-modal-card{display:flex;align-items:center;gap:12px;padding:14px;border-radius:20px}
.booking-modal-photo{width:68px;height:68px;border-radius:22px}
.modal-surface{border-radius:28px;border:1px solid var(--line);box-shadow:var(--shadow)}
@media (max-width: 768px){.booking-modal-grid{grid-template-columns:1fr}.subject-grid{grid-template-columns:1fr}}
.auth-body{background:var(--bg)}
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}
.auth-card{width:min(620px,100%);border-radius:28px;padding:34px 30px}
.auth-brand{font-weight:900;color:var(--ink);font-size:24px;margin-bottom:18px}
.auth-title{font-size:42px;text-align:center;font-weight:900;color:var(--ink);margin-bottom:20px}
.feature-card{display:block;border-radius:24px;padding:24px;text-decoration:none;transition:transform .15s ease,box-shadow .15s ease;text-align:center;min-height:220px}
.feature-card:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(0,0,0,.08)}
.feature-icon{width:88px;height:88px;border-radius:18px;background:#f4f8ff;border:1px solid var(--line);margin:0 auto 18px;display:grid;place-items:center;font-size:40px}
.feature-card h3{font-size:20px;font-weight:900;color:var(--brand)}
.feature-card p{color:var(--muted);margin:8px 0 0}
.timeline{display:flex;flex-direction:column;gap:12px}.timeline-item{display:flex;justify-content:space-between;align-items:center;border-radius:16px;padding:16px 18px;gap:16px}
.profile-card{display:flex;align-items:center;gap:18px}.profile-avatar{width:84px;height:84px;border-radius:22px;background:linear-gradient(135deg,var(--brand-soft),var(--accent-soft));display:grid;place-items:center;font-weight:900;font-size:30px;color:var(--brand);border:1px solid var(--line)}
#bookingForm .form-control{border-radius:16px}

.tutoring-shell{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start}
.call-stage{background:#0c1730;border-radius:28px;padding:16px;border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow)}
.call-frame{min-height:680px;border-radius:22px;overflow:hidden;background:#08101f}
.session-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-weight:800;font-size:13px}
.todo-list{display:flex;flex-direction:column;gap:10px}
.todo-item{display:flex;align-items:flex-start;gap:10px;padding:12px 14px;border:1px solid var(--line);border-radius:16px;background:#fff}
.todo-item input{margin-top:4px;width:18px;height:18px}
.todo-item label{font-weight:700;color:var(--ink)}
.todo-item small{display:block;color:var(--muted);margin-top:2px}
.session-status{padding:16px 18px;border-radius:20px;background:#f8fbff;border:1px solid var(--line)}
@media (max-width: 1100px){.tutoring-shell{grid-template-columns:1fr}.call-frame{min-height:560px}}


.messaging-shell{align-items:stretch}
.messaging-sidebar{height:calc(100vh - 210px);min-height:0;overflow:auto}
.messaging-thread{height:calc(100vh - 210px);min-height:0;display:flex;flex-direction:column}
.chat-list-item,.group-card{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border:1px solid var(--line);border-radius:18px;background:#fff;text-decoration:none;color:inherit;transition:transform .12s ease,box-shadow .12s ease}
.chat-list-item:hover,.group-card:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(16,34,61,.08)}
.chat-list-item.is-active{border-color:rgba(31,75,153,.3);background:linear-gradient(135deg,rgba(31,75,153,.06),rgba(123,212,196,.08))}
.chat-avatar{width:46px;height:46px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand-soft),var(--accent-soft));font-weight:900;color:var(--brand);flex-shrink:0}
.chat-meta{flex:1;min-width:0}
.chat-meta strong{display:block;color:var(--ink)}
.chat-meta span,.chat-meta p{display:block;color:var(--muted);font-size:13px;line-height:1.4;overflow:hidden;text-overflow:ellipsis}
.thread-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding-bottom:14px}
.thread-pill{padding:10px 14px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-weight:800;white-space:nowrap}
.sms-window{flex:1 1 auto;min-height:0;display:flex;flex-direction:column;gap:12px;overflow:auto;padding-right:4px;max-height:none}
.sms-row{display:flex}
.sms-row.mine{justify-content:flex-end}
.sms-row.theirs{justify-content:flex-start}
.sms-bubble{max-width:min(78%, 540px);padding:12px 14px;border-radius:20px;border:1px solid var(--line);background:#f8fbff;box-shadow:0 8px 20px rgba(16,34,61,.05)}
.sms-row.mine .sms-bubble{background:linear-gradient(135deg,rgba(31,75,153,.1),rgba(123,212,196,.16));border-color:rgba(31,75,153,.18)}
.sms-meta{font-size:12px;font-weight:800;letter-spacing:.02em;color:var(--muted);margin-bottom:6px}
.sms-body{color:var(--ink);white-space:normal;word-break:break-word;line-height:1.45}
.reply-box{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);flex-shrink:0}
.empty-thread{display:grid;place-items:start;min-height:540px;padding:24px}
.group-card{justify-content:space-between}
.group-card.joined{border-color:rgba(123,212,196,.5);background:rgba(123,212,196,.08)}
@media (max-width: 1100px){.messaging-sidebar,.messaging-thread{height:auto;min-height:auto}.sms-window{max-height:none}}