/* Eesti Keel — minimal, dark, fast. No framework. */
:root{
  --bg:#0e1116; --panel:#161b22; --line:#262d38;
  --fg:#e6edf3; --muted:#8b949e;
  --accent:#4a9eff; --good:#3fb950; --warn:#d29922; --bad:#f85149;
  --radius:10px;
}
*{box-sizing:border-box}
body{
  margin:0; background:var(--bg); color:var(--fg);
  font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.25;margin:1.4rem 0 .6rem}
h1{font-size:1.6rem}
h2{font-size:1.2rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.05em}
code,.parts{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}
.muted{color:var(--muted)}
.small{font-size:.85rem}

/* layout */
.topbar{
  display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap;
  padding:.7rem 1.2rem;background:var(--panel);border-bottom:1px solid var(--line);
}
.brand{font-weight:700;letter-spacing:-.02em;color:var(--fg)}
.brand span{color:var(--accent)}
.topbar nav{display:flex;gap:1.1rem;flex:1}
.topbar nav a{color:var(--muted);font-size:.93rem}
.topbar nav a:hover{color:var(--fg);text-decoration:none}
.user{display:flex;align-items:center;gap:.8rem;font-size:.9rem;color:var(--muted)}
main{max-width:820px;margin:0 auto;padding:1.5rem 1.2rem 4rem}
body.centered{display:grid;place-items:center;min-height:100vh;padding:1rem}

/* bits */
.badge{background:var(--accent);color:#000;border-radius:99px;padding:0 .45em;font-size:.75rem;font-weight:700}
.chip{border:1px solid var(--line);border-radius:99px;padding:.1rem .5rem;font-size:.8rem}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem;max-width:380px;width:100%}
.notice{background:var(--panel);border-left:3px solid var(--accent);padding:.8rem 1rem;border-radius:6px}
.error{color:var(--bad)}
.can-do{background:var(--panel);border-left:3px solid var(--good);padding:.7rem 1rem;border-radius:6px}

button,.btn{
  font:inherit;cursor:pointer;border-radius:8px;border:1px solid var(--accent);
  background:var(--accent);color:#04121f;padding:.55rem 1.1rem;font-weight:600;
  display:inline-block;
}
.btn:hover{filter:brightness(1.1);text-decoration:none}
.btn.ghost{background:transparent;color:var(--accent)}
button.link{background:none;border:none;color:var(--muted);padding:0;font-weight:400;text-decoration:underline}
button.audio{background:transparent;border:1px solid var(--line);color:var(--accent);padding:.15rem .5rem;font-size:.8rem}
button.audio.big{font-size:1.2rem;padding:.4rem .9rem;margin-top:.6rem}

/* auth */
.auth h1{margin:0 0 .2rem}
.auth label{display:block;margin:.9rem 0 0;font-size:.88rem;color:var(--muted)}
.auth label.row{display:flex;align-items:center;gap:.5rem}
.auth input{
  width:100%;margin-top:.25rem;padding:.55rem .7rem;font:inherit;
  background:var(--bg);border:1px solid var(--line);border-radius:7px;color:var(--fg);
}
.auth input[type=checkbox]{width:auto;margin:0}
.auth button[type=submit]{width:100%;margin-top:1.2rem}

/* stats */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:.7rem;margin:1rem 0}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:.8rem}
.stat b{display:block;font-size:1.5rem;line-height:1.1}
.stat span{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}

.forecast{display:flex;gap:4px;align-items:flex-end;height:110px;margin-top:.5rem}
.forecast .bar{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%}
.forecast .bar span{width:100%;background:var(--accent);border-radius:3px 3px 0 0;min-height:2px}
.forecast .bar small{font-size:.6rem;color:var(--muted);margin-top:.2rem}

/* lexemes */
.lex-grid{display:grid;gap:.5rem}
.lex{
  display:flex;align-items:center;gap:.7rem;flex-wrap:wrap;
  background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:.6rem .8rem;
}
.lex .gloss{color:var(--muted)}
.lex .parts{margin-left:auto;color:var(--good)}
.tag.grad{font-size:.7rem;background:#3a2d0a;color:var(--warn);border-radius:4px;padding:.1rem .4rem}
.phrases{list-style:none;padding:0}
.phrases li{padding:.5rem 0;border-bottom:1px solid var(--line);display:flex;gap:.6rem;align-items:baseline;flex-wrap:wrap}

/* review */
.progress{color:var(--muted);font-size:.85rem}
.card-face{text-align:center;padding:2.5rem 1rem;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);margin:.8rem 0}
.card-face h2{font-size:2rem;color:var(--fg);text-transform:none;letter-spacing:0;margin:0}
.card-back{text-align:center;padding:1.2rem;border:1px dashed var(--line);border-radius:var(--radius);margin-bottom:.8rem}
.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem}
.grade{border:none}
.g1{background:var(--bad);color:#fff}
.g2{background:var(--warn);color:#000}
.g3{background:var(--good);color:#04121f}
.g4{background:var(--accent);color:#04121f}
.blocks{padding-left:1.2rem}
.blocks li{margin:.3rem 0}

/* auth page switch link — this used to read "Have an invite code?", which
   nobody recognised as "sign up". Make it an obvious, tappable route. */
.switch{margin-top:1.3rem;padding-top:1.1rem;border-top:1px solid var(--line);
        text-align:center;font-size:.9rem;color:var(--muted)}
.switch a{font-weight:600}
.auth small{display:block;margin-top:.25rem;font-size:.78rem}

/* invites */
.invites{margin-top:2rem;background:var(--panel);border:1px solid var(--line);
         border-radius:var(--radius);padding:1rem 1.2rem}
.invites h2{margin-top:0}
.invite-list{list-style:none;padding:0;margin:0 0 .9rem}
.invite-list li{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;
                padding:.45rem 0;border-bottom:1px solid var(--line)}
.invite-list code{color:var(--good);font-weight:600;letter-spacing:.05em}
.invite-list li button{margin-left:auto}
.btn.small{padding:.25rem .7rem;font-size:.8rem}

/* toast */
.toast{
  position:fixed;left:50%;bottom:1.5rem;transform:translateX(-50%);
  background:var(--panel);border:1px solid var(--line);border-radius:8px;
  padding:.7rem 1.1rem;max-width:min(90vw,520px);box-shadow:0 8px 30px rgba(0,0,0,.5);
}
.toast.warn{border-color:var(--warn)}

@media (max-width:560px){
  .topbar{gap:.7rem}
  .topbar nav{gap:.8rem;order:3;width:100%}
  .grades{grid-template-columns:repeat(2,1fr)}
}