.student-app{
  --bg:#0b1020;--card:#121a2b;--card-strong:#182238;--input:#0e1628;
  --fg:#f3f6fb;--muted:#9ba8bd;--border:#27344a;--red:#d9363e;
  --accent:#7193ff;--accent-soft:rgba(113,147,255,.13);--success:#4fbf91;
  --danger:#ef5b62;--shadow:0 18px 48px rgba(0,0,0,.25);
  width:100%;min-height:100vh;min-height:100svh;margin:0;overflow-x:hidden;color:var(--fg);background:
    radial-gradient(1000px 520px at 82% 170px,rgba(211,47,47,.10),transparent 62%),
    radial-gradient(900px 500px at -10% calc(100% - 110px),rgba(99,102,241,.10),transparent 64%),var(--bg);
  background-repeat:no-repeat;
}
@media(prefers-color-scheme:light){.student-app{
  --bg:#f5f6f8;--card:#fff;--card-strong:#f8f9fb;--input:#f4f6f9;
  --fg:#182031;--muted:#6b7587;--border:#e2e6ec;--accent:#355fd6;
  --accent-soft:rgba(53,95,214,.09);--success:#16845d;--danger:#c92d36;
  --shadow:0 18px 48px rgba(24,32,49,.08)
}}
.student-app *{box-sizing:border-box}
.student-app [hidden]{display:none!important}
.student-app button,.student-app input,.student-app textarea,.student-app select{font:inherit}
.student-app button{-webkit-tap-highlight-color:transparent}
.student-app .rsd-header{left:0;right:0;width:100%;background:var(--card);backdrop-filter:none;-webkit-backdrop-filter:none}
.student-app .rsd-header-inner{max-width:1160px}
.student-app .rsd-header .nav-action{border-radius:999px;padding:8px 16px}

.student-login-shell{min-height:100vh;display:grid;place-items:center;padding:24px}
.student-login-card{width:min(440px,100%);padding:26px;border:1px solid var(--border);border-radius:24px;background:color-mix(in srgb,var(--card) 96%,transparent);box-shadow:var(--shadow)}
.student-login-brand{display:flex;align-items:center;gap:15px;margin-bottom:24px}
.student-login-brand h1{margin:0;font-size:24px;letter-spacing:-.02em}
.student-login-brand p{margin:5px 0 0;color:var(--muted);font-size:14px}
.student-login-card label{display:block;margin:14px 0 7px;font-size:13px;font-weight:750;color:var(--muted)}
.student-login-card input,.student-sheet input,.student-sheet textarea,.student-sheet select{width:100%;min-height:48px;padding:12px 14px;border:1px solid var(--border);border-radius:13px;background:var(--input);color:var(--fg);outline:none}
.student-login-card input:focus,.student-sheet input:focus,.student-sheet textarea:focus,.student-sheet select:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}

.student-button{min-height:44px;padding:10px 16px;border:1px solid transparent;border-radius:13px;font-weight:750;cursor:pointer;transition:transform .16s ease,background .16s ease,opacity .16s ease}
.student-button:active{transform:scale(.98)}
.student-button:disabled{opacity:.55;cursor:wait}
.student-button.primary{background:var(--accent);color:#fff}
.student-button.secondary{border-color:var(--border);background:var(--card);color:var(--fg)}
.student-button.ghost{border-color:transparent;background:transparent;color:var(--muted)}
.student-button.ghost:hover{background:var(--accent-soft);color:var(--fg)}
.student-button.danger{border-color:color-mix(in srgb,var(--danger) 35%,var(--border));background:color-mix(in srgb,var(--danger) 10%,var(--card));color:var(--danger)}
.student-button.wide{width:100%;margin-top:14px}
.student-button.compact{min-height:38px;padding:8px 12px;font-size:13px}
.student-button-row{display:flex;gap:9px;flex-wrap:wrap;margin-top:14px}
.student-message{min-height:21px;margin-top:12px;color:var(--muted);font-size:13px;line-height:1.5}
.student-access-request{display:block;margin-top:9px;color:var(--muted);font-size:13px;font-weight:700;text-align:center;text-underline-offset:3px}
.student-access-request:hover{color:var(--fg)}
.student-push-setting{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:18px;padding:14px;border:1px solid var(--border);border-radius:15px;background:var(--input)}
.student-push-setting strong{display:block;font-size:14px}
.student-push-setting span{display:block;margin-top:4px;color:var(--muted);font-size:12px;line-height:1.4}
.student-push-setting .student-button{flex:0 0 auto}
.student-push-message{min-height:0;margin:7px 2px 0;color:var(--muted);font-size:12px;line-height:1.4}
.student-data-note{margin-top:18px;border-top:1px solid var(--border);padding-top:14px;color:var(--muted);font-size:13px;line-height:1.5}
.student-data-note summary{display:inline-flex;align-items:center;min-height:38px;color:var(--fg);font-weight:700;cursor:pointer;list-style:none}
.student-data-note summary::-webkit-details-marker{display:none}
.student-data-note summary::after{content:'+';margin-left:8px;color:var(--muted);font-size:18px;font-weight:500}
.student-data-note[open] summary::after{content:'−'}
.student-data-note div{padding:2px 0 1px}
.student-data-note p{margin:8px 0;color:var(--muted);font-size:13px}
.student-data-note a{color:var(--accent);overflow-wrap:anywhere}
@media(max-width:480px){.student-push-setting{align-items:flex-start;flex-direction:column}.student-push-setting .student-button{width:100%}}

.student-desktop-nav{position:sticky;left:0;right:0;top:71px;z-index:70;width:100%;border-bottom:1px solid var(--border);background:var(--bg)}
.student-desktop-nav-inner{width:min(1160px,100%);height:54px;margin:auto;padding:7px 16px;display:flex;align-items:center;gap:6px}
.student-nav-link{height:38px;padding:0 16px;border:0;border-radius:12px;background:transparent;color:var(--muted);font-size:14px;font-weight:750;cursor:pointer}
.student-nav-link:hover{color:var(--fg);background:var(--accent-soft)}
.student-nav-link.active{color:var(--fg);background:var(--card);box-shadow:inset 0 0 0 1px var(--border)}
.student-main{width:min(1160px,100%);margin:auto;padding:28px 16px 70px}
.student-view{animation:student-enter .22s ease both}
@keyframes student-enter{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.student-page-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin:0 0 18px}
.student-page-heading h2{margin:3px 0 0;font-size:clamp(25px,3vw,34px);line-height:1.1;letter-spacing:-.035em}
.student-page-heading p{margin:8px 0 0;color:var(--muted);line-height:1.5}
.student-eyebrow{display:block;color:var(--muted);font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.student-home-grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(290px,.85fr);gap:16px;align-items:stretch}
.student-panel,.student-next-card{border:1px solid var(--border);border-radius:22px;background:color-mix(in srgb,var(--card) 97%,transparent);box-shadow:var(--shadow)}

.student-next-card{position:relative;min-height:310px;padding:26px;overflow:hidden;background:var(--card)}
.student-next-card>*{position:relative}
.student-next-card .next-status{display:inline-flex;align-items:center;min-height:29px;padding:5px 10px;border:1px solid color-mix(in srgb,var(--accent) 25%,var(--border));border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:850;letter-spacing:.04em;text-transform:uppercase}
.student-next-card .next-time{margin:28px 0 0;font-size:clamp(42px,7vw,64px);font-weight:820;line-height:.95;letter-spacing:-.055em}
.student-next-card .next-date{margin:12px 0 0;color:var(--muted);font-size:16px;font-weight:650;text-transform:capitalize}
.student-next-card .next-series{margin:8px 0 0;color:var(--muted);font-size:13px}
.student-next-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:34px}
.student-next-actions .student-button.secondary{min-width:150px}
.student-loading-card{display:grid;place-items:center;color:var(--muted)}
.student-next-empty{display:flex;min-height:100%;flex-direction:column;justify-content:center;align-items:flex-start}
.student-next-empty h3{font-size:28px;margin:8px 0}
.student-next-empty p{color:var(--muted);margin:0 0 22px}

.student-panel{padding:20px}
.student-section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.student-section-head h3{margin:3px 0 0;font-size:19px;letter-spacing:-.02em}
.student-text-button{padding:8px;border:0;background:transparent;color:var(--accent);font-weight:750;cursor:pointer}
.student-list{display:grid;gap:9px}
.student-lesson-row{display:grid;grid-template-columns:58px minmax(0,1fr) auto;align-items:center;gap:12px;padding:12px;border:1px solid var(--border);border-radius:16px;background:var(--card-strong);color:inherit;text-align:left}
button.student-lesson-row{width:100%;cursor:pointer}
button.student-lesson-row:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--border))}
.student-lesson-date{display:grid;place-items:center;min-height:52px;border-radius:13px;background:var(--accent-soft);color:var(--accent);font-weight:850}
.student-lesson-date small{display:block;font-size:10px;letter-spacing:.08em;text-transform:uppercase}
.student-lesson-date strong{display:block;font-size:18px;line-height:1}
.student-lesson-main{min-width:0}
.student-lesson-main strong{display:block;font-size:15px}
.student-lesson-main span{display:block;margin-top:4px;color:var(--muted);font-size:12px}
.student-lesson-chevron{color:var(--muted);font-size:21px}
.student-empty{padding:28px;border:1px dashed var(--border);border-radius:18px;color:var(--muted);text-align:center;line-height:1.5}
.student-subtle-action{display:inline-flex;align-items:center;gap:7px;margin-top:15px;padding:10px 4px;border:0;background:transparent;color:var(--muted);font-weight:700;cursor:pointer}
.student-subtle-action:hover{color:var(--fg)}

.student-segments{display:inline-flex;gap:4px;margin-bottom:16px;padding:4px;border:1px solid var(--border);border-radius:14px;background:var(--card)}
.student-segments button{min-height:38px;padding:7px 14px;border:0;border-radius:10px;background:transparent;color:var(--muted);font-size:13px;font-weight:750;cursor:pointer}
.student-segments button.active{background:var(--accent-soft);color:var(--accent)}
.student-plan-list{grid-template-columns:repeat(2,minmax(0,1fr))}
.student-plan-list .student-lesson-row{min-height:82px}
#planHistory.student-plan-list{display:block}
.student-history-summary{margin:0 2px 10px;color:var(--muted);font-size:12px;line-height:1.45}
.student-history-summary strong{color:var(--fg);font-weight:800}
.student-history-filters{display:flex;gap:6px;margin-bottom:12px;overflow-x:auto;padding:1px 1px 4px;scrollbar-width:none}
.student-history-filters::-webkit-scrollbar{display:none}
.student-history-filter{flex:none;min-height:34px;padding:6px 10px;border:1px solid var(--border);border-radius:999px;background:var(--card);color:var(--muted);font-size:11px;font-weight:750;white-space:nowrap;cursor:pointer}
.student-history-filter.active{border-color:var(--fg);background:var(--fg);color:var(--card)}
.student-history-list{display:grid;gap:7px}
.student-plan-list .student-history-row{grid-template-columns:minmax(0,1fr) auto auto;min-height:0;padding:10px 12px;border-radius:12px;gap:10px;opacity:.96}
.student-history-row:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--border))}
.student-history-main{display:flex;min-width:0;align-items:center;justify-content:space-between;gap:10px}
.student-history-main>strong{min-width:0;font-size:13px;line-height:1.35}
.student-history-status{display:inline-flex!important;flex:none;width:max-content;margin:0!important;padding:3px 7px;border-radius:999px;font-size:10px!important;font-weight:800}
.student-history-status.completed{background:color-mix(in srgb,var(--success) 13%,transparent);color:var(--success)}
.student-history-status.cancelled{background:color-mix(in srgb,var(--red) 12%,transparent);color:var(--red)}
.student-history-status.rescheduled{background:color-mix(in srgb,var(--accent) 13%,transparent);color:var(--accent)}
.student-history-change-count{flex:none;color:var(--accent);font-size:10px;font-weight:800}
.student-history-detail{display:grid;gap:5px;margin-top:14px;padding:14px;border:1px solid var(--border);border-radius:14px;background:var(--card-strong)}
.student-history-detail strong{font-size:15px}
.student-history-detail span{color:var(--muted);font-size:13px;line-height:1.45}
.student-history-detail.completed{border-left:4px solid var(--success)}
.student-history-detail.cancelled{border-left:4px solid var(--red)}
.student-history-detail.rescheduled{border-left:4px solid var(--accent)}
.student-history-timeline{display:grid;gap:8px;margin-top:16px;padding-top:14px;border-top:1px solid var(--border)}
.student-history-timeline>strong{font-size:13px}
.student-history-timeline>div{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:8px;padding:10px;border-radius:12px;background:var(--card-strong)}
.student-history-timeline span{color:var(--muted);font-size:12px;line-height:1.4}
.student-history-timeline b{color:var(--accent);font-size:14px}
@media(max-width:520px){.student-history-timeline>div{grid-template-columns:1fr}.student-history-timeline b{transform:rotate(90deg);transform-origin:center}}
@media(max-width:620px){
  .student-plan-list .student-history-row{grid-template-columns:minmax(0,1fr) auto;align-items:center}
  .student-history-main{align-items:flex-start;flex-direction:column;gap:5px}
  .student-history-change-count{grid-column:1;margin-top:-2px}
  .student-history-row .student-lesson-chevron{grid-column:2;grid-row:1/3}
}
.student-week-panel{padding:14px}
.student-app .student-week-panel .st-mine{background:#30466f!important;border-color:#49699f!important;color:#fff!important}
.student-app .student-week-panel .fc .fc-toolbar{display:grid}

.student-availability{display:grid;gap:12px}
.student-day-group{display:grid;grid-template-columns:minmax(160px,.34fr) minmax(0,1fr);gap:16px;padding:17px 18px;border:1px solid var(--border);border-radius:20px;background:var(--card)}
.student-day-label strong{display:block;font-size:17px;text-transform:capitalize}
.student-day-label span{display:block;margin-top:4px;color:var(--muted);font-size:12px}
.student-time-grid{display:flex;align-content:flex-start;flex-wrap:wrap;gap:8px}
.student-time-chip{min-width:98px;min-height:43px;padding:9px 13px;border:1px solid color-mix(in srgb,var(--accent) 26%,var(--border));border-radius:12px;background:var(--accent-soft);color:var(--accent);font-weight:800;cursor:pointer}
.student-time-chip:hover{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 16%,var(--card))}
.student-more-days{justify-self:center;margin-top:4px}

.student-install{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 18px;padding:12px 14px;border:1px solid var(--border);border-radius:16px;background:var(--card)}
.student-install strong,.student-install span{display:block}.student-install strong{font-size:13px}.student-install span{margin-top:2px;color:var(--muted);font-size:12px}

.student-overlay{position:fixed;inset:0;z-index:100;background:rgba(4,8,16,.58);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px)}
.student-sheet{position:fixed;left:50%;top:50%;z-index:101;width:min(570px,calc(100vw - 28px));max-height:min(760px,calc(100vh - 36px));padding:22px;overflow:auto;transform:translate(-50%,-50%);border:1px solid var(--border);border-radius:24px;background:var(--card);color:var(--fg);box-shadow:0 28px 90px rgba(0,0,0,.42)}
.student-sheet-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:18px}
.student-sheet h3{margin:0;font-size:23px;letter-spacing:-.025em}
.student-sheet p{color:var(--muted);line-height:1.5}
.student-sheet-close{width:40px;height:40px;flex:0 0 auto;border:1px solid var(--border);border-radius:50%;background:var(--card-strong);color:var(--fg);font-size:22px;cursor:pointer}
.student-current-box,.student-change-summary{padding:14px;border:1px solid var(--border);border-radius:16px;background:var(--card-strong)}
.student-current-box span,.student-change-summary span{display:block;color:var(--muted);font-size:12px}.student-current-box strong,.student-change-summary strong{display:block;margin-top:5px;font-size:16px}
.student-change-arrow{padding:7px 0;color:var(--muted);text-align:center}
.student-sheet-section-title{margin:20px 0 10px;font-size:13px;color:var(--muted);font-weight:800;text-transform:uppercase;letter-spacing:.08em}
.student-suggestion-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.student-suggestion{padding:13px;border:1px solid var(--border);border-radius:15px;background:var(--card-strong);color:var(--fg);text-align:left;cursor:pointer}
.student-suggestion strong,.student-suggestion span{display:block}.student-suggestion span{margin-top:4px;color:var(--muted);font-size:12px}
.student-suggestion:hover{border-color:var(--accent)}
.student-sheet .rsd-booking-form>label{font-size:13px}
.student-sheet .rsd-booking-actions{position:sticky;bottom:-22px;margin-left:-22px;margin-right:-22px;padding:14px 22px calc(14px + env(safe-area-inset-bottom));border-top:1px solid var(--border);background:color-mix(in srgb,var(--card) 95%,transparent);backdrop-filter:blur(12px)}
.student-detail-actions{display:grid;gap:9px;margin-top:20px}
.student-cancel-disclosure{margin-top:18px;padding-top:10px;border-top:1px solid var(--border)}
.student-cancel-disclosure summary{padding:9px 0;color:var(--muted);font-size:14px;font-weight:750;cursor:pointer}
.student-cancel-disclosure-body{padding:1px 0 2px}
.student-cancel-disclosure-body p{margin:4px 0 6px;color:var(--muted);font-size:13px;line-height:1.5}
.student-cancel-link{color:var(--muted);font-size:13px;text-decoration:underline;text-underline-offset:3px}
.student-cancel-link:hover{color:var(--fg)}
.student-cancel-form{margin-top:18px;padding-top:18px;border-top:1px solid var(--border)}
.student-cancel-title{display:block;margin-bottom:4px;font-size:16px}
.student-cancel-form>p{margin:0 0 15px;color:var(--muted);font-size:13px;line-height:1.5}
.student-cancel-form label{display:block;margin-bottom:7px;color:var(--muted);font-size:13px;font-weight:750}
.student-cancel-form textarea{min-height:90px;resize:vertical}
.student-cancel-series{flex-basis:100%;margin-top:4px}
.student-toast{position:fixed;left:50%;bottom:28px;z-index:130;max-width:min(480px,calc(100vw - 28px));padding:12px 17px;transform:translateX(-50%);border:1px solid color-mix(in srgb,var(--success) 35%,var(--border));border-radius:999px;background:color-mix(in srgb,var(--card) 94%,var(--success) 6%);color:var(--fg);box-shadow:var(--shadow);font-size:13px;font-weight:750}
.student-mobile-nav{display:none}

@media(max-width:760px){
  .student-app{background:
    radial-gradient(620px 360px at 105% 78px,rgba(211,47,47,.10),transparent 62%),
    radial-gradient(580px 430px at -24% calc(100% - 90px),rgba(99,102,241,.10),transparent 64%),var(--bg);background-repeat:no-repeat}
  .student-app .rsd-header-inner{min-height:62px;padding:6px 10px}
  .student-app .rsd-header .brand-index-logo{width:52px;height:44.57px;flex-basis:52px}
  .student-app .rsd-header .brand-index-tile{transform:scale(.3714285714)}
  .student-app .rsd-brand{gap:8px}.student-app .rsd-brand h1{font-size:16px}
  .student-app .rsd-brand .sub{font-size:11px}
  .student-app .rsd-header .nav-action{display:inline-flex;align-items:center;justify-content:center;gap:7px;width:auto;min-width:82px;height:42px;padding:0 13px;font-size:12px;border-radius:999px}
  .student-app .rsd-header .nav-action:before{content:"";width:17px;height:17px;flex:0 0 17px;background:currentColor;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20 21a8 8 0 0 0-16 0M12 13a4 4 0 1 0 0-8 4 4 0 0 0 0 8' fill='none' stroke='black' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") center/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20 21a8 8 0 0 0-16 0M12 13a4 4 0 1 0 0-8 4 4 0 0 0 0 8' fill='none' stroke='black' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") center/contain no-repeat}
  .student-desktop-nav{display:none}
  .student-main{padding:20px 10px calc(92px + env(safe-area-inset-bottom))}
  .desktop-calendar-tab{display:none!important}
  .student-page-heading{margin-bottom:14px}.student-page-heading h2{font-size:27px}
  .student-home-grid{grid-template-columns:1fr}
  .student-plan-list{grid-template-columns:1fr}
  .student-day-group{grid-template-columns:1fr;gap:12px;padding:15px}
  .student-home-grid{grid-template-columns:1fr;gap:12px}
  .student-next-card{min-height:276px;padding:21px;border-radius:21px}
  .student-next-card .next-time{margin-top:24px;font-size:48px}
  .student-next-card .next-date{font-size:15px}
  .student-next-actions{margin-top:28px}.student-next-actions .student-button{flex:1}
  .student-panel{padding:16px;border-radius:19px;box-shadow:none}
  .student-plan-list{grid-template-columns:1fr}
  .desktop-calendar-tab{display:none}
  .student-day-group{grid-template-columns:1fr;gap:12px;padding:16px;border-radius:18px}
  .student-time-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
  .student-time-chip{min-width:0;padding:9px 5px}
  .student-mobile-nav{position:fixed;left:0;right:0;bottom:0;z-index:80;display:grid;grid-template-columns:repeat(3,1fr);padding:7px 8px calc(7px + env(safe-area-inset-bottom));border-top:1px solid var(--border);background:color-mix(in srgb,var(--card) 94%,transparent);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
  .student-mobile-nav button{display:grid;place-items:center;gap:3px;min-height:52px;padding:4px;border:0;border-radius:13px;background:transparent;color:var(--muted);font-size:10px;font-weight:750;cursor:pointer}
  .student-mobile-nav button.active{background:var(--accent-soft);color:var(--accent)}
  .student-mobile-nav svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
  .student-sheet{left:0;right:0;top:auto;bottom:0;width:100%;max-height:91vh;padding:20px 16px calc(16px + env(safe-area-inset-bottom));transform:none;border-width:1px 0 0;border-radius:24px 24px 0 0}
  .student-sheet.student-sheet-centered{left:50%;right:auto;top:50%;bottom:auto;width:calc(100% - 28px);max-height:calc(100svh - 36px);padding:18px;transform:translate(-50%,-50%);border-width:1px;border-radius:20px}
  .student-sheet .rsd-booking-actions{bottom:calc(-16px - env(safe-area-inset-bottom));margin-left:-16px;margin-right:-16px;padding-left:16px;padding-right:16px}
  .student-suggestion-grid{grid-template-columns:1fr}
  .student-toast{bottom:calc(82px + env(safe-area-inset-bottom))}
}
@media(max-width:390px){.student-time-chip{min-width:calc(50% - 4px);flex:1}.student-next-card .next-time{font-size:43px}}
@media(prefers-reduced-motion:reduce){.student-app *{scroll-behavior:auto!important;animation:none!important;transition:none!important}}