:root{
  --bg:#f5f5f7; --card:#fff; --text:#1d1d1f; --sub:#6e6e73; --line:#e5e5ea; --fill:#f2f2f7;
  --blue:#0071e3; --green:#34c759; --orange:#ff9f0a; --red:#ff3b30; --purple:#af52de;
  --radius:18px; --shadow:0 1px 2px rgba(0,0,0,.04),0 8px 30px rgba(0,0,0,.05);
  color-scheme:light;
}
:root[data-theme=dark]{--bg:#000;--card:#1c1c1e;--text:#f5f5f7;--sub:#98989d;--line:#2c2c2e;--fill:#2c2c2e;--blue:#2997ff;
  --shadow:none;color-scheme:dark}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Inter","Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;letter-spacing:-.011em;line-height:1.45}
button{font:inherit;cursor:pointer}
h1,h2,h3{letter-spacing:-.02em;margin:0}

/* layout */
.shell{display:grid;grid-template-columns:248px 1fr;min-height:100vh}
.side{position:sticky;top:0;height:100vh;padding:22px 14px;display:flex;flex-direction:column;gap:4px;
  background:color-mix(in srgb,var(--card) 70%,transparent);backdrop-filter:saturate(180%) blur(24px);border-right:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:17px;padding:4px 12px 20px}
.logo{width:30px;height:30px;border-radius:8px;background:#000;border:1px solid rgba(255,255,255,.14);display:grid;place-items:center;color:#fff;overflow:hidden;flex:none}
.logo svg{width:18px;height:18px;display:block}
.nav{display:flex;align-items:center;gap:11px;border:0;background:none;color:var(--text);text-align:left;
  padding:9px 12px;border-radius:10px;font-size:14.5px;font-weight:500;transition:background .2s}
.nav svg{width:18px;height:18px;color:var(--sub);flex:none;transition:color .2s}
.nav:hover{background:var(--fill)}
.nav.on{background:color-mix(in srgb,var(--blue) 13%,transparent);color:var(--blue)}
.nav.on svg{color:var(--blue)}
.grow{flex:1}
.user{font-size:12.5px;color:var(--sub);padding:10px 12px;word-break:break-all}
.content{padding:36px 44px 90px;max-width:1080px;width:100%;animation:fade .45s ease}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.top{display:flex;align-items:flex-end;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.top h1{font-size:34px;font-weight:700;flex:1}
.top .sub{width:100%;order:3;margin-top:-10px}

/* controls */
.btn{border:0;background:var(--blue);color:#fff;font-size:14px;font-weight:500;padding:9px 18px;border-radius:980px;
  transition:opacity .2s,transform .15s;display:inline-flex;align-items:center;gap:8px}
.btn:hover{opacity:.88}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.5;cursor:default}
.btn.ghost{background:color-mix(in srgb,var(--blue) 13%,transparent);color:var(--blue)}
.btn.danger{background:color-mix(in srgb,var(--red) 13%,transparent);color:var(--red)}
.btn.sm{padding:6px 12px;font-size:12.5px;border-radius:8px}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.btn svg{width:16px;height:16px}
.spin{animation:rot 1s linear infinite}@keyframes rot{to{transform:rotate(360deg)}}
input,select,textarea{font:inherit;font-size:15px;color:var(--text);background:var(--fill);border:1px solid transparent;
  border-radius:11px;padding:10px 13px;outline:0;width:100%;transition:border-color .2s,box-shadow .2s,background .2s}
input:focus,textarea:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 4px color-mix(in srgb,var(--blue) 22%,transparent)}
label.f{display:grid;gap:6px;font-size:13px;font-weight:500;color:var(--sub)}
label.f small{font-weight:400;color:var(--sub);opacity:.85}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stack{display:grid;gap:18px;max-width:560px}
.sw{display:flex;gap:14px;align-items:center;justify-content:space-between;font-size:15px}
.sw small{display:block;color:var(--sub);font-size:13px}
.switch{appearance:none;-webkit-appearance:none;width:51px;height:31px;border-radius:99px;background:color-mix(in srgb,var(--sub) 35%,transparent);
  position:relative;padding:0;flex:none;cursor:pointer;transition:background .25s;border:0}
.switch::after{content:"";position:absolute;top:2px;left:2px;width:27px;height:27px;border-radius:50%;background:#fff;
  box-shadow:0 2px 4px rgba(0,0,0,.25);transition:transform .25s cubic-bezier(.3,.9,.3,1)}
.switch:checked{background:var(--green)}.switch:checked::after{transform:translateX(20px)}
.range{display:flex;align-items:center;gap:14px}.range input[type=range]{padding:0;accent-color:var(--blue);background:none}
.range output{width:48px;text-align:right;font-weight:600;font-variant-numeric:tabular-nums}

/* cards */
.card{background:var(--card);border-radius:var(--radius);padding:26px;margin-bottom:20px;box-shadow:var(--shadow)}
.card h2{font-size:20px;font-weight:600;margin-bottom:4px}
.card>.sub{margin-bottom:18px}
.sub{color:var(--sub);font-size:14px}
.hero{display:grid;grid-template-columns:auto 1fr;gap:34px;align-items:center}
.ring{--p:0;--c:var(--blue);width:140px;height:140px;border-radius:50%;display:grid;place-items:center;
  background:conic-gradient(var(--c) calc(var(--p)*1%),var(--line) 0)}
.ring>div{width:112px;height:112px;border-radius:50%;background:var(--card);display:grid;place-items:center;text-align:center;
  font-size:30px;font-weight:700;line-height:1}
.ring small{display:block;font-size:11px;font-weight:500;color:var(--sub);margin-top:4px}
.hero h2{font-size:26px;font-weight:700}
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}
.kpi{background:var(--fill);border-radius:14px;padding:12px 14px}
.kpi b{display:block;font-size:24px;font-weight:700;font-variant-numeric:tabular-nums}
.kpi span{font-size:12px;color:var(--sub)}
.banner{display:flex;gap:12px;align-items:center;padding:14px 18px;border-radius:14px;margin-bottom:18px;font-size:14px;
  background:color-mix(in srgb,var(--red) 11%,transparent);color:var(--red)}
.banner.info{background:color-mix(in srgb,var(--blue) 11%,transparent);color:var(--blue)}

/* lessons */
.day{margin-top:26px}
.day h3{font-size:12.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--sub);font-weight:600;margin:0 4px 10px}
.lesson{display:grid;grid-template-columns:96px 1fr auto auto;gap:14px;align-items:center;background:var(--card);
  border-radius:15px;padding:13px 16px;margin-bottom:8px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.lesson:hover{transform:translateY(-1px);box-shadow:0 10px 30px rgba(0,0,0,.08)}
.time{color:var(--sub);font-size:13px;font-variant-numeric:tabular-nums}
.name{font-weight:550;cursor:pointer}
.reason{grid-column:1/-1;font-size:13px;color:var(--sub);padding-left:110px;display:none;margin-top:-6px}
.lesson.open .reason{display:block;animation:fade .3s}
.badge{font-size:12px;font-weight:600;padding:4px 12px;border-radius:980px;color:var(--c);background:color-mix(in srgb,var(--c) 14%,transparent);white-space:nowrap}
.yes{--c:var(--green)}.maybe{--c:var(--orange)}.no{--c:var(--red)}.planned{--c:var(--purple)}.over{--c:var(--red)}
.plan{border:1px solid var(--line);background:none;color:var(--sub);border-radius:980px;padding:4px 12px;font-size:12px;transition:all .2s}
.plan:hover{color:var(--purple);border-color:var(--purple)}
.plan.on{background:var(--purple);border-color:var(--purple);color:#fff}
.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--sub);margin-bottom:6px}
.legend i{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--c);margin-right:6px}

/* tables */
table{width:100%;border-collapse:collapse;font-size:14.5px}
th{text-align:left;color:var(--sub);font-weight:500;font-size:12px;padding:8px 8px}
td{padding:13px 8px;border-top:1px solid var(--line);font-variant-numeric:tabular-nums}
td input{width:70px;padding:7px 9px;text-align:center}
.mini{height:6px;background:var(--line);border-radius:3px;overflow:hidden;width:100px}
.mini i{display:block;height:100%;background:var(--c);border-radius:3px;transition:width .8s}
.stars{display:inline-flex;gap:3px}.stars button{border:0;background:none;padding:2px 3px;font-size:17px;color:var(--line);transition:transform .15s,color .15s;line-height:1}
.stars button.on{color:var(--orange)}.stars button:hover{transform:scale(1.2)}

/* mobile subjects card layout */
.subjects-desktop{display:block}
.subjects-mobile{display:none}
.sub-card{background:var(--card);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);display:grid;gap:12px}
.sc-head{display:flex;justify-content:space-between;align-items:center;gap:10px}
.sc-title{font-size:16px;font-weight:600;line-height:1.25}
.sc-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;background:var(--fill);padding:10px 12px;border-radius:12px;text-align:center}
.sc-stat span{display:block;font-size:11px;color:var(--sub);margin-bottom:2px}
.sc-stat b{font-size:13.5px;font-weight:700;font-variant-numeric:tabular-nums}
.sc-ctrls{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.sc-goal{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--sub);font-weight:500}
.sc-goal input{width:56px;padding:6px 8px;text-align:center;font-size:14px;font-weight:600;border-radius:8px}
.sc-stars{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--sub);font-weight:500}

/* mobile admin card layout */
.admin-desktop{display:block}
.admin-mobile{display:none}
.admin-card{background:var(--card);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);display:grid;gap:12px}
.ac-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;flex-wrap:wrap}
.ac-user{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.ac-user b{font-size:14.5px;font-weight:600;word-break:break-all}
.ac-info{display:grid;grid-template-columns:1fr 1fr;gap:8px;background:var(--fill);padding:9px 12px;border-radius:10px;font-size:12px}
.ac-info small{display:block;color:var(--sub);font-size:11px;margin-bottom:2px}
.ac-info span{font-weight:500;font-variant-numeric:tabular-nums}
.ac-err{background:color-mix(in srgb,var(--red) 12%,transparent);color:var(--red);padding:8px 12px;border-radius:8px;font-size:12px;word-break:break-word}
.ac-actions{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}

/* settings */
.tabs{display:flex;gap:6px;background:color-mix(in srgb,var(--sub) 14%,transparent);padding:4px;border-radius:12px;width:100%;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;margin-bottom:20px;box-sizing:border-box}
.tabs::-webkit-scrollbar{display:none}
.tabs button{border:0;background:none;color:var(--text);font-size:13.5px;font-weight:500;padding:7px 14px;border-radius:8px;transition:all .2s;white-space:nowrap;flex:0 0 auto}
.tabs button.on{background:var(--card);box-shadow:0 1px 4px rgba(0,0,0,.15)}
.steps{counter-reset:s;display:grid;gap:12px;padding:0;list-style:none;margin:0 0 20px}
.steps li{counter-increment:s;display:flex;gap:12px;font-size:14px}
.steps li::before{content:counter(s);flex:none;width:24px;height:24px;border-radius:50%;background:var(--blue);color:#fff;font-size:12px;font-weight:600;display:grid;place-items:center}
.status{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500}
.status i{width:9px;height:9px;border-radius:50%;background:var(--c)}

/* auth */
.auth{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}
.pitch{padding:70px;display:flex;flex-direction:column;justify-content:center;gap:30px;color:#fff;
  background:radial-gradient(1200px 600px at 10% 0%,#5e5ce6 0,transparent 60%),radial-gradient(900px 600px at 100% 100%,#0a84ff 0,transparent 55%),#111}
.pitch h1{font-size:46px;font-weight:700;line-height:1.08}
.pitch p{font-size:18px;opacity:.8;max-width:460px;margin:0}
.feat{display:grid;gap:14px;font-size:15px;opacity:.9}.feat div{display:flex;gap:12px;align-items:center}
.feat svg{width:20px;height:20px;flex:none}
.formside{display:grid;place-items:center;padding:40px}
.formbox{width:100%;max-width:380px;display:grid;gap:18px;animation:fade .5s}
.formbox h2{font-size:28px;font-weight:700}
.link{background:none;border:0;color:var(--blue);padding:0;font-size:14px;cursor:pointer}
.link:hover{text-decoration:underline}
.err{color:var(--red);font-size:13.5px;min-height:20px}
.foot{margin-top:40px;font-size:12.5px;color:var(--sub);max-width:560px}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);opacity:0;background:var(--text);color:var(--bg);
  padding:11px 22px;border-radius:980px;font-size:14px;transition:all .35s cubic-bezier(.3,.9,.3,1);pointer-events:none;z-index:50}
.toast.show{opacity:1;transform:translate(-50%,0)}
.empty{text-align:center;padding:60px 20px}.empty h2{font-size:26px;margin-bottom:8px}.empty .btn{margin-top:18px}

@media(max-width:900px){
  html,body{overflow-x:hidden;max-width:100vw;width:100%}
  .shell{grid-template-columns:1fr;width:100%;max-width:100vw;overflow-x:hidden}
  .side{position:fixed;top:auto;bottom:0;left:0;right:0;height:auto;flex-direction:row;
    padding:5px 6px calc(6px + env(safe-area-inset-bottom,0px));z-index:100;border-right:0;border-top:1px solid var(--line);
    background:color-mix(in srgb,var(--card) 94%,transparent);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);
    justify-content:space-around;align-items:center;box-sizing:border-box;width:100%;max-width:100vw;gap:2px}
  .brand,.user,.grow,.desktop-only,#pwa-install,#sidebar-home,#sidebar-logout{display:none!important}
  .nav{flex:1 1 0;min-width:0;max-width:20%;padding:6px 2px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;border-radius:10px;text-align:center}
  .nav svg{width:20px;height:20px;flex:none}
  .nav span{display:block!important;font-size:10px;line-height:1.1;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
  .content{padding:20px 16px calc(76px + env(safe-area-inset-bottom,0px));width:100%;max-width:100vw;box-sizing:border-box;overflow-x:hidden}
  .top{display:flex;flex-direction:column;align-items:flex-start;gap:8px;margin-bottom:20px}
  .top h1{font-size:26px;word-break:break-word}
  .top .sub{margin-top:0;font-size:13.5px}
  .top .btn{align-self:flex-start}
  .hero{grid-template-columns:1fr;justify-items:center;text-align:center}
  .kpis{grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px}
  .auth{grid-template-columns:1fr}.pitch{padding:40px 28px}.pitch h1{font-size:34px}
  .lesson{grid-template-columns:1fr auto}.time{grid-column:1/-1}.reason{padding-left:0}.grid2{grid-template-columns:1fr}
  table{font-size:13px}.mini{display:none}
}
@media(max-width:760px){
  .subjects-desktop{display:none}
  .subjects-mobile{display:grid;gap:12px}
  .admin-desktop{display:none}
  .admin-mobile{display:grid;gap:12px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}