/* ============================================================
   OOPS I ENGLISHE'D AGAIN — Design System
   Public site: deep teal / mint / warm cream
   LMS: indigo / pink / lavender
   ============================================================ */
:root {
  --teal-900:#063A38; --teal-700:#0B5B55; --teal-600:#0F766E; --teal-500:#14958B;
  --mint-300:#7FE3CF; --mint-100:#E4FBF3; --cream:#FFF7E8; --cream-200:#FBEFD7;
  --indigo-900:#241E6B; --indigo-700:#3730A3; --indigo-600:#4F46E5; --indigo-500:#6366F1;
  --indigo-100:#E0E7FF; --indigo-50:#EEF2FF;
  --pink-600:#DB2777; --pink-500:#EC4899; --pink-100:#FCE7F3;
  --lav-500:#A78BFA; --lav-100:#EDE9FE;
  --ink:#1E1B31; --ink-soft:#4B4768; --muted:#7A7694;
  --line:#E7E5F0; --bg:#F7F6FB; --card:#FFFFFF;
  --ok:#16A34A; --warn:#D97706; --bad:#DC2626;
  --r-sm:8px; --r:12px; --r-lg:18px; --r-xl:26px;
  --shadow:0 1px 2px rgba(30,27,49,.06),0 8px 24px rgba(30,27,49,.07);
  --shadow-lg:0 12px 40px rgba(30,27,49,.16);
  --font:'Manrope',ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --font-head:'Sora',var(--font);
}
* { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body { font-family:var(--font); color:var(--ink); background:var(--bg); font-size:16px; line-height:1.55; -webkit-font-smoothing:antialiased; }
img,svg { max-width:100%; display:block; }
a { color:var(--teal-600); text-decoration:none; }
a:hover { text-decoration:underline; }
h1,h2,h3,h4 { font-family:var(--font-head); line-height:1.15; letter-spacing:-.015em; }
h1 { font-size:clamp(1.9rem,4.5vw,3.2rem); font-weight:800; }
h2 { font-size:clamp(1.4rem,3vw,2rem); font-weight:800; }
h3 { font-size:1.15rem; font-weight:700; }
.small { font-size:.85rem; } .muted { color:var(--muted); } .caption { font-size:.75rem; color:var(--muted); }
.center { text-align:center; }
.mono { font-variant-numeric:tabular-nums; }

/* ---------- layout ---------- */
.wrap { max-width:1160px; margin:0 auto; padding:0 20px; }
.grid { display:grid; gap:18px; }
.g2 { grid-template-columns:repeat(2,1fr); } .g3 { grid-template-columns:repeat(3,1fr); } .g4 { grid-template-columns:repeat(4,1fr); }
.row { display:flex; gap:12px; align-items:center; } .row.wrapf { flex-wrap:wrap; }
.spread { display:flex; justify-content:space-between; align-items:center; gap:12px; }
.stack { display:flex; flex-direction:column; gap:12px; }
@media (max-width:900px){ .g3,.g4 { grid-template-columns:repeat(2,1fr);} }
@media (max-width:600px){ .g2,.g3,.g4 { grid-template-columns:1fr;} }

/* ---------- app shell (LMS) ---------- */
.shell { display:grid; grid-template-columns:248px 1fr; min-height:100vh; }
.shell-side { background:var(--indigo-900); color:#E6E4F7; padding:18px 14px; display:flex; flex-direction:column; gap:6px; position:sticky; top:0; height:100vh; overflow-y:auto; }
.shell-side .brandline { font-family:var(--font-head); font-weight:800; color:#fff; font-size:1rem; padding:2px 10px 14px; letter-spacing:-.01em; }
.shell-side .brandline em { color:var(--mint-300); font-style:normal; }
.shell-main { min-width:0; display:flex; flex-direction:column; }
.snav { display:flex; flex-direction:column; gap:2px; }
.snav a { display:flex; align-items:center; gap:10px; padding:9px 12px; border-radius:10px; color:#C9C6E8; font-weight:600; font-size:.92rem; }
.snav a:hover { background:rgba(255,255,255,.07); text-decoration:none; color:#fff; }
.snav a.on { background:var(--indigo-600); color:#fff; }
.snav .sep { margin:10px 12px 4px; font-size:.68rem; text-transform:uppercase; letter-spacing:.12em; color:#8E89C4; }
.side-user { margin-top:auto; border-top:1px solid rgba(255,255,255,.12); padding:12px 10px 4px; display:flex; gap:10px; align-items:center; }
.side-user b { color:#fff; font-size:.9rem; display:block; }
.side-user .muted { color:#A5A1CF; font-size:.75rem; }
.main-head { display:flex; justify-content:space-between; align-items:center; gap:14px; padding:14px 26px; background:var(--card); border-bottom:1px solid var(--line); position:sticky; top:0; z-index:30; }
.main-body { padding:24px 26px 60px; max-width:1180px; width:100%; margin:0 auto; }
@media (max-width:900px){
  .shell { grid-template-columns:1fr; }
  .shell-side { position:fixed; z-index:60; left:0; top:0; bottom:0; width:262px; transform:translateX(-105%); transition:transform .25s; height:100dvh; }
  .shell.side-open .shell-side { transform:none; box-shadow:var(--shadow-lg); }
  .main-head { padding:12px 14px; } .main-body { padding:16px 14px 90px; }
}
.burger { display:none; } .side-mask { display:none; }
@media (max-width:900px){ .burger { display:inline-flex; } .shell.side-open .side-mask { display:block; position:fixed; inset:0; background:rgba(20,18,40,.4); z-index:55; } }
.mtabbar { display:none; }
@media (max-width:700px){
  .mtabbar { display:flex; position:fixed; bottom:0; left:0; right:0; background:#fff; border-top:1px solid var(--line); z-index:50; padding:4px 2px calc(4px + env(safe-area-inset-bottom)); }
  .mtabbar a { flex:1; text-align:center; font-size:.66rem; color:var(--muted); padding:6px 2px; border-radius:8px; font-weight:700; }
  .mtabbar a.on { color:var(--indigo-600); background:var(--indigo-50); text-decoration:none; }
  .mtabbar a span { display:block; font-size:1.15rem; }
}

/* ---------- buttons ---------- */
.btn { display:inline-flex; align-items:center; justify-content:center; gap:8px; border:0; cursor:pointer; font:inherit; font-weight:700; border-radius:12px; padding:10px 18px; font-size:.95rem; transition:transform .12s, box-shadow .12s, background .12s; text-decoration:none !important; }
.btn:active { transform:translateY(1px); }
.btn-pri { background:var(--teal-600); color:#fff; } .btn-pri:hover { background:var(--teal-700); }
.btn-ind { background:var(--indigo-600); color:#fff; } .btn-ind:hover { background:var(--indigo-700); }
.btn-pink { background:var(--pink-500); color:#fff; } .btn-pink:hover { background:var(--pink-600); }
.btn-ghost { background:transparent; color:var(--ink); box-shadow:inset 0 0 0 1.5px var(--line); }
.btn-ghost:hover { box-shadow:inset 0 0 0 1.5px var(--indigo-500); color:var(--indigo-600); }
.btn-soft { background:var(--indigo-50); color:var(--indigo-700); }
.btn-mint { background:var(--mint-100); color:var(--teal-700); }
.btn-danger { background:#FEE2E2; color:var(--bad); }
.btn-sm { padding:6px 12px; font-size:.82rem; border-radius:9px; }
.btn-lg { padding:13px 26px; font-size:1.05rem; border-radius:14px; }
.btn[disabled] { opacity:.5; cursor:not-allowed; }
.btn-quiet { background:transparent; color:var(--muted); } .btn-quiet:hover { color:var(--ink); }

/* ---------- chips / badges / dots ---------- */
.badge { display:inline-flex; align-items:center; gap:6px; font-size:.72rem; font-weight:800; padding:3px 10px; border-radius:99px; letter-spacing:.02em; }
.b-teal { background:var(--mint-100); color:var(--teal-700); } .b-ind { background:var(--indigo-100); color:var(--indigo-700); }
.b-pink { background:var(--pink-100); color:var(--pink-600); } .b-lav { background:var(--lav-100); color:#6D28D9; }
.b-gray { background:#EEF0F4; color:var(--ink-soft); } .b-ok { background:#DCFCE7; color:#15803D; }
.b-warn { background:#FEF3C7; color:#92400E; } .b-bad { background:#FEE2E2; color:#B91C1C; }
.dot { width:8px; height:8px; border-radius:99px; display:inline-block; } .dot-ok { background:var(--ok);} .dot-warn{background:var(--warn);} .dot-bad{background:var(--bad);} .dot-gray{background:#CBD0DC;}

/* ---------- cards / kpi ---------- */
.card { background:var(--card); border:1px solid var(--line); border-radius:var(--r-lg); padding:18px; box-shadow:var(--shadow); }
.card.hover:hover { box-shadow:var(--shadow-lg); transform:translateY(-2px); }
.card.hover { transition:transform .15s, box-shadow .15s; }
.card-h { font-size:.72rem; font-weight:800; text-transform:uppercase; letter-spacing:.1em; color:var(--muted); margin-bottom:10px; }
.kpi { font-family:var(--font-head); font-size:1.7rem; font-weight:800; }
.kpi small { font-size:.95rem; color:var(--muted); font-weight:600; }
.cover { border-radius:var(--r); width:100%; object-fit:cover; aspect-ratio:16/9; background:var(--mint-100); }

/* ---------- progress ---------- */
.pbar { height:9px; background:var(--indigo-100); border-radius:99px; overflow:hidden; }
.pbar > i { display:block; height:100%; background:linear-gradient(90deg,var(--indigo-500),var(--pink-500)); border-radius:99px; transition:width .5s; }
.pbar.mint > i { background:linear-gradient(90deg,var(--teal-500),var(--mint-300)); }
.ring { --p:0; width:74px; height:74px; border-radius:50%; background:conic-gradient(var(--indigo-600) calc(var(--p)*1%), var(--indigo-100) 0); display:grid; place-items:center; }
.ring::before { content:attr(data-label); width:58px; height:58px; border-radius:50%; background:#fff; display:grid; place-items:center; font-family:var(--font-head); font-weight:800; font-size:.95rem; }

/* ---------- forms ---------- */
.field { display:flex; flex-direction:column; gap:5px; margin-bottom:14px; }
.field label { font-size:.82rem; font-weight:800; color:var(--ink-soft); }
.input, select.input, textarea.input { width:100%; border:1.5px solid var(--line); border-radius:12px; padding:10px 14px; font:inherit; background:#fff; color:var(--ink); }
.input:focus { outline:none; border-color:var(--indigo-500); box-shadow:0 0 0 3px var(--indigo-100); }
textarea.input { resize:vertical; min-height:90px; }
.check { display:flex; gap:8px; align-items:center; font-size:.9rem; color:var(--ink-soft); }
.seg { display:inline-flex; background:#EEF0F6; border-radius:12px; padding:4px; gap:4px; }
.seg button { border:0; background:transparent; font:inherit; font-weight:700; padding:7px 16px; border-radius:9px; cursor:pointer; color:var(--muted); }
.seg button.on { background:#fff; color:var(--indigo-700); box-shadow:var(--shadow); }

/* ---------- tables ---------- */
.tbl { width:100%; border-collapse:collapse; font-size:.92rem; }
.tbl th { text-align:left; font-size:.7rem; text-transform:uppercase; letter-spacing:.09em; color:var(--muted); padding:8px 10px; border-bottom:1.5px solid var(--line); }
.tbl td { padding:11px 10px; border-bottom:1px solid var(--line); vertical-align:middle; }
.tbl tr:hover td { background:#FAFAFE; }
.tblwrap { overflow-x:auto; }

/* ---------- tabs ---------- */
.tabs { display:flex; gap:6px; border-bottom:2px solid var(--line); margin-bottom:16px; flex-wrap:wrap; }
.tabs button { border:0; background:none; font:inherit; font-weight:700; color:var(--muted); padding:9px 14px; cursor:pointer; border-bottom:2.5px solid transparent; margin-bottom:-2px; }
.tabs button.on { color:var(--indigo-700); border-color:var(--indigo-600); }

/* ---------- modal / toast / dropdown ---------- */
.modal-mask { position:fixed; inset:0; background:rgba(22,20,44,.5); z-index:90; display:grid; place-items:center; padding:16px; }
.modal { background:#fff; border-radius:var(--r-lg); max-width:520px; width:100%; padding:22px; box-shadow:var(--shadow-lg); max-height:88vh; overflow:auto; }
.modal h3 { margin-bottom:10px; }
.toasts { position:fixed; bottom:18px; right:18px; z-index:120; display:flex; flex-direction:column; gap:8px; }
.toast { background:var(--ink); color:#fff; padding:11px 16px; border-radius:12px; box-shadow:var(--shadow-lg); font-size:.9rem; font-weight:600; animation:pop .25s; max-width:340px; }
.toast.ok { background:var(--ok);} .toast.bad { background:var(--bad);}
@keyframes pop { from { transform:translateY(8px); opacity:0; } }
.dd { position:relative; }
.dd-menu { position:absolute; top:calc(100% + 8px); right:0; background:#fff; border:1px solid var(--line); border-radius:14px; box-shadow:var(--shadow-lg); padding:8px; min-width:230px; z-index:80; max-height:70vh; overflow:auto; }
.dd-menu .dd-title { font-size:.68rem; text-transform:uppercase; letter-spacing:.1em; color:var(--muted); padding:8px 10px 4px; }
.dd-menu a, .dd-menu button { display:block; width:100%; text-align:left; background:none; border:0; font:inherit; font-weight:600; padding:8px 10px; border-radius:9px; color:var(--ink); cursor:pointer; }
.dd-menu a:hover, .dd-menu button:hover { background:var(--indigo-50); text-decoration:none; }
.bell { position:relative; }
.bell .cnt { position:absolute; top:-6px; right:-7px; background:var(--pink-500); color:#fff; font-size:.62rem; font-weight:800; border-radius:99px; padding:1px 5px; }
.notif { display:flex; gap:10px; padding:10px; border-radius:10px; align-items:flex-start; }
.notif:hover { background:var(--indigo-50); }
.notif.unread { background:var(--indigo-50); }
.notif .t { font-size:.86rem; font-weight:600; } .notif .ts { font-size:.72rem; color:var(--muted); }

/* ---------- skeleton / empty ---------- */
.skel { border-radius:10px; background:linear-gradient(90deg,#ECEBF3 25%,#F6F5FA 45%,#ECEBF3 65%); background-size:200% 100%; animation:sk 1.3s infinite; min-height:14px; }
@keyframes sk { to { background-position:-200% 0; } }
.empty { text-align:center; padding:40px 18px; color:var(--ink-soft); }
.empty .big { font-size:2rem; margin-bottom:8px; }
.empty b { display:block; font-family:var(--font-head); margin-bottom:4px; }

/* ---------- public site ---------- */
.phead { position:sticky; top:0; z-index:70; background:rgba(255,255,255,.92); backdrop-filter:blur(10px); border-bottom:1px solid var(--line); }
.phead .in { display:flex; align-items:center; gap:22px; height:66px; }
.plogo { font-family:var(--font-head); font-weight:800; font-size:1.02rem; color:var(--teal-900); letter-spacing:-.02em; text-decoration:none !important; line-height:1.1; }
.plogo em { font-style:normal; color:var(--pink-500); }
.pnav { display:flex; gap:4px; align-items:center; flex:1; }
.pnav > .dd > button, .pnav > a.plink { background:none; border:0; font:inherit; font-weight:700; font-size:.92rem; color:var(--ink-soft); padding:8px 11px; border-radius:9px; cursor:pointer; text-decoration:none !important; }
.pnav > .dd > button:hover, .pnav > a.plink:hover { background:var(--mint-100); color:var(--teal-700); }
.pnav .dd-menu { left:0; right:auto; }
.hero { background:linear-gradient(160deg,var(--cream) 0%,#fff 55%,var(--mint-100) 100%); padding:64px 0 72px; }
.hero .oops { color:var(--pink-500); }
.hero-sub { font-size:1.13rem; color:var(--ink-soft); max-width:560px; margin:14px 0 26px; }
.section { padding:58px 0; }
.section.alt { background:#fff; border-block:1px solid var(--line); }
.kicker { display:inline-flex; font-size:.72rem; font-weight:800; letter-spacing:.12em; text-transform:uppercase; color:var(--teal-600); background:var(--mint-100); padding:4px 12px; border-radius:99px; margin-bottom:14px; }
.step-arrow { font-size:1.3rem; color:var(--teal-500); }
.fgrid { display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:30px; padding:44px 0 26px; }
@media (max-width:800px){ .fgrid { grid-template-columns:1fr 1fr; } }
.pburger { display:none; }
@media (max-width:960px){ .pnav { display:none; } .pburger { display:inline-flex; } .pauth .btn-ghost { display:none; } }

/* ---------- misc ---------- */
.avatar { width:34px; height:34px; border-radius:50%; object-fit:cover; background:var(--lav-100); }
.avatar.lg { width:64px; height:64px; }
.count { font-variant-numeric:tabular-nums; font-family:var(--font-head); font-weight:800; }
.cal { display:grid; grid-template-columns:repeat(7,1fr); gap:6px; }
.cal .dow { font-size:.68rem; font-weight:800; color:var(--muted); text-transform:uppercase; text-align:center; padding:4px 0; }
.cal .day { min-height:64px; border:1px solid var(--line); border-radius:10px; padding:5px 6px; font-size:.78rem; background:#fff; cursor:pointer; }
.cal .day.out { opacity:.35; }
.cal .day.today { border-color:var(--indigo-500); box-shadow:0 0 0 1.5px var(--indigo-500); }
.cal .ev { display:block; font-size:.64rem; font-weight:700; border-radius:6px; padding:1px 5px; margin-top:3px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.ev-lesson { background:var(--indigo-100); color:var(--indigo-700);} .ev-hw { background:var(--pink-100); color:var(--pink-600);} .ev-club { background:var(--mint-100); color:var(--teal-700);}
.flashcards { display:grid; gap:10px; grid-template-columns:repeat(auto-fill,minmax(150px,1fr)); }
.fcard { perspective:600px; cursor:pointer; height:110px; }
.fcard .in { position:relative; width:100%; height:100%; transition:transform .4s; transform-style:preserve-3d; }
.fcard.flip .in { transform:rotateY(180deg); }
.fcard .f, .fcard .b { position:absolute; inset:0; backface-visibility:hidden; border-radius:14px; display:grid; place-items:center; padding:10px; text-align:center; font-weight:700; }
.fcard .f { background:var(--indigo-600); color:#fff; font-size:1.05rem; }
.fcard .b { background:var(--mint-100); color:var(--teal-700); transform:rotateY(180deg); font-size:.92rem; }
.verb { display:flex; gap:6px; flex-wrap:wrap; margin:8px 0; }
.verb button { border:1.5px solid var(--line); background:#fff; border-radius:10px; padding:7px 12px; font:inherit; font-weight:700; cursor:pointer; }
.verb button:hover { border-color:var(--indigo-500); }
.match { display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.match button { border:1.5px solid var(--line); background:#fff; border-radius:12px; padding:10px; font:inherit; font-weight:700; cursor:pointer; text-align:left; }
.match button.sel { border-color:var(--indigo-600); background:var(--indigo-50); }
.match button.done { border-color:var(--ok); background:#F0FDF4; color:var(--ok); }
.tf b { cursor:pointer; border-bottom:2px dotted var(--lav-500); }
.hlword { background:var(--mint-100); border-bottom:2px solid var(--teal-500); cursor:pointer; border-radius:4px 4px 0 0; padding:0 2px; }
.hlmeaning { background:var(--cream); border:1px solid var(--cream-200); padding:10px 14px; border-radius:12px; margin-top:8px; font-size:.92rem; }
.chatthread { display:flex; flex-direction:column; gap:10px; }
.chatthread-post { background:var(--bg); border:1px solid var(--line); border-radius:4px 16px 16px 16px; padding:10px 14px; font-size:.95rem; }
.gaprow { display:flex; flex-wrap:wrap; gap:6px; align-items:center; margin:8px 0; font-size:.95rem; }
.gap-input { width:110px; border:0; border-bottom:2px solid var(--lav-500); font:inherit; padding:3px 6px; background:transparent; }
.gap-input:focus { outline:none; border-color:var(--indigo-600); }
.gap-input.ok { border-color:var(--ok); color:var(--ok); font-weight:700; }
.gap-input.bad { border-color:var(--bad); }
.excard { background:#fff; border:1px solid var(--line); border-radius:var(--r-lg); padding:16px; margin-bottom:14px; }
.excard-actions { display:flex; gap:8px; margin-top:10px; flex-wrap:wrap; align-items:center; }
.feedback { border-radius:10px; padding:9px 13px; font-size:.88rem; margin-top:8px; }
.fb-ok { background:#F0FDF4; color:#166534; } .fb-no { background:#FEF2F2; color:#991B1B; }
.board { background:var(--indigo-50); border:1px solid var(--indigo-100); border-radius:var(--r); padding:14px; margin:8px 0; }
.board h4 { font-size:.8rem; text-transform:uppercase; letter-spacing:.08em; color:var(--indigo-700); margin-bottom:6px; }
.board table { width:100%; border-collapse:collapse; font-size:.9rem; }
.board td { padding:5px 8px; border-bottom:1px dashed var(--indigo-100); }
.rec-dot { width:10px; height:10px; background:var(--bad); border-radius:50%; display:inline-block; animation:blink 1s infinite; }
@keyframes blink { 50% { opacity:.25; } }
@media (prefers-reduced-motion: reduce) { * { animation:none !important; transition:none !important; } html { scroll-behavior:auto; } }
:focus-visible { outline:3px solid var(--lav-500); outline-offset:2px; border-radius:4px; }

/* ---- student LMS: lesson runner, homework, chat ---- */
.lsticky{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line);padding:10px 0;margin-bottom:6px}
.lsticky .lp{display:flex;justify-content:space-between;gap:10px;font-size:.85rem;margin-bottom:6px}
.lhero{padding:22px 0 4px}
.lhero h1{margin:6px 0;font-size:2rem}
.lsec-head{display:flex;align-items:center;gap:10px;margin:26px 0 4px}
.lsec-head .ico{font-size:1.6rem}
.lsec-head h2{margin:0;font-size:1.25rem}
.sec-type{margin-left:auto;font-size:.8rem;color:#7a7488}
.lsub{margin:0 0 14px}
.exnav{display:flex;justify-content:space-between;gap:10px;margin:24px 0 8px}
.lresults{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;margin:20px 0}
.chipbar{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 20px}
.chip{padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:.85rem;text-decoration:none;color:inherit}
.chip:hover{border-color:#e05a8a;color:#e05a8a}
.hw{border:1px solid var(--line);border-radius:16px;background:#fff;padding:16px;margin-bottom:12px}
.count{font-variant-numeric:tabular-nums;color:#7a7488;font-size:.9rem}
.msgrow{display:flex;flex-direction:column;gap:8px;margin:14px 0}
.msg{max-width:72%;padding:10px 14px;border-radius:16px;font-size:.95rem}
.msg.they{background:#f2eefa;border-bottom-left-radius:4px}
.msg.me{background:linear-gradient(135deg,#e05a8a,#8a5ae0);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.msg .t{display:block;font-size:.7rem;opacity:.7;margin-top:4px}