:root{
  --bg: #f4f5f1;
  --paper: #ffffff;
  --paper-soft: #fbfbf9;
  --ink: #212a2e;
  --ink-soft: #565f5f;
  --line: #dfe2da;
  --line-soft: #ebede7;
  --brand: #6d2440;
  --brand-ink: #4a1830;
  --brand-tint: #f6e9ee;
  --gold: #a5793a;
  --gold-tint: #f7efdf;
  --ok: #276b52;
  --ok-tint: #e4f2ec;
  --err: #b0392b;
  --err-tint: #fbeae7;
  --sky: #2c5f78;
  --sky-tint: #e7f0f3;
  --radius: 10px;
  --serif: 'Lora', 'PT Serif', Georgia, serif;
  --sans: 'PT Sans', 'Segoe UI', Arial, sans-serif;
  --mono: 'JetBrains Mono', 'Consolas', monospace;
  --shadow: 0 1px 2px rgba(33,42,46,.05), 0 4px 16px rgba(33,42,46,.06);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:15.5px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--brand-tint); color:var(--brand-ink);}
a{color:var(--brand);}
button{font-family:inherit;}
h1,h2,h3,h4{font-family:var(--serif); font-weight:600; margin:0 0 .5em; color:var(--ink);}
.tag-sr{font-family:var(--mono); letter-spacing:.02em;}

/* ---------- App shell ---------- */
#app{max-width:1180px;margin:0 auto;padding:0 16px 60px;}
.topbar{
  display:flex; align-items:center; gap:18px;
  padding:22px 4px 18px;
  border-bottom:1px solid var(--line);
  margin-bottom:20px;
  flex-wrap:wrap;
}
.brand-block{flex:1 1 260px;}
.brand-title{
  font-family:var(--serif); font-weight:700; font-size:1.5rem; margin:0;
  color:var(--brand-ink); display:flex; align-items:baseline; gap:.5em; flex-wrap:wrap;
}
.brand-title .lat{font-style:italic; font-weight:500; color:var(--ink-soft); font-size:.68em;}
.brand-sub{margin:.25em 0 0; color:var(--ink-soft); font-size:.88rem;}
.topbar-tools{display:flex; align-items:center; gap:14px;}
.reset-link{
  background:none;border:none;color:var(--ink-soft); font-size:.72rem; cursor:pointer;
  text-decoration:underline; text-underline-offset:2px; padding:4px;
}
.reset-link:hover{color:var(--err);}

/* Progress ring */
.ring-wrap{display:flex; flex-direction:column; align-items:center; gap:2px; cursor:pointer;}
.ring-svg{width:74px; height:74px;}
.ring-bg{fill:none; stroke:var(--line); stroke-width:6;}
.ring-fg{fill:none; stroke:var(--brand); stroke-width:6; stroke-linecap:round; transition:stroke-dasharray .4s ease;}
.ring-num{font-family:var(--serif); font-weight:700; font-size:17px; fill:var(--ink);}
.ring-label{font-size:.68rem; color:var(--ink-soft);}

/* Layout */
.layout{display:flex; gap:26px; align-items:flex-start;}
.sidebar{
  flex:0 0 250px; position:sticky; top:16px;
  display:flex; flex-direction:column; gap:2px;
  max-height:calc(100vh - 32px); overflow-y:auto;
}
.side-heading{font-size:.72rem; text-transform:uppercase; letter-spacing:.08em; color:var(--ink-soft); margin:16px 0 6px; padding:0 10px;}
.side-heading:first-child{margin-top:0;}
.side-level-tag{font-size:.62rem; color:#9aa39a; padding:6px 10px 2px; font-family:var(--mono);}
.side-btn{
  display:flex; align-items:center; gap:9px;
  background:none; border:1px solid transparent; border-radius:8px;
  padding:7px 10px; text-align:left; cursor:pointer; width:100%;
  color:var(--ink); font-size:.87rem;
}
.side-btn:hover{background:var(--paper-soft); border-color:var(--line-soft);}
.side-btn.active{background:var(--paper); border-color:var(--line); box-shadow:var(--shadow); font-weight:700;}
.side-dot{width:8px; height:8px; border-radius:50%; flex:0 0 auto; background:var(--line); border:1.5px solid var(--ink-soft);}
.side-dot.st-new{background:var(--paper); border-color:var(--line);}
.side-dot.st-inprogress{background:var(--gold); border-color:var(--gold);}
.side-dot.st-mastered{background:var(--ok); border-color:var(--ok);}
.side-dot.st-soon{background:transparent; border-style:dashed; border-color:#b7bcb2;}
.side-num{font-family:var(--mono); font-size:.72rem; color:var(--ink-soft); flex:0 0 18px;}

main#content{flex:1 1 auto; min-width:0;}

/* Cards */
.card{
  background:var(--paper); border:1px solid var(--line); border-radius:var(--radius);
  padding:22px 24px; margin-bottom:18px; box-shadow:var(--shadow);
}
.lesson-header{margin-bottom:8px;}
.lesson-kicker{font-family:var(--mono); font-size:.75rem; letter-spacing:.06em; color:var(--brand); text-transform:uppercase; display:flex; gap:10px; align-items:center; flex-wrap:wrap;}
.lesson-title{font-size:1.9rem; margin:.15em 0 .1em;}
.lesson-title .lat{font-style:italic; color:var(--ink-soft); font-weight:500; font-size:.6em; margin-left:.4em;}
.lesson-subtitle{color:var(--ink-soft); font-size:1rem; margin:0;}
.focus-pill{display:inline-block; background:var(--sky-tint); color:var(--sky); border-radius:14px; padding:2px 11px; font-size:.72rem; font-family:var(--mono);}
.level-pill{display:inline-block; background:var(--gold-tint); color:var(--gold); border-radius:14px; padding:2px 11px; font-size:.72rem; font-family:var(--mono);}

table.decl-table{width:100%; border-collapse:collapse; margin:14px 0; font-size:.92rem;}
table.decl-table th, table.decl-table td{border:1px solid var(--line); padding:7px 10px; text-align:left; vertical-align:top;}
table.decl-table th{background:var(--paper-soft); font-family:var(--serif); font-weight:600;}
table.decl-table .sr{font-family:var(--mono); color:var(--brand-ink);}
.example-block{background:var(--paper-soft); border-left:3px solid var(--gold); padding:10px 14px; border-radius:0 8px 8px 0; margin:12px 0; font-size:.95rem;}
.example-block .sr-ex{font-family:var(--mono); color:var(--ink);}
.note-box{background:var(--gold-tint); border:1px solid #ecd9b4; border-radius:8px; padding:10px 14px; font-size:.9rem; margin:12px 0;}
.note-box b{color:var(--gold);}
.info-box{background:var(--sky-tint); border:1px solid #cfe1e8; border-radius:8px; padding:10px 14px; font-size:.87rem; margin:12px 0; color:#284a56;}

/* Mini grammar */
.mini-grammar h3{font-size:1.05rem; margin-top:18px;}
.mini-grammar h3:first-child{margin-top:0;}

/* Dialogue */
.dialogue-box{margin:10px 0 6px;}
.dialogue-toolbar{display:flex; justify-content:flex-end; margin-bottom:8px;}
.dialogue-line{display:flex; margin-bottom:10px;}
.dialogue-line.side-a{justify-content:flex-start;}
.dialogue-line.side-b{justify-content:flex-end;}
.dialogue-bubble{max-width:78%; background:var(--paper-soft); border:1px solid var(--line-soft); border-radius:14px; padding:8px 14px;}
.dialogue-line.side-b .dialogue-bubble{background:var(--brand-tint); border-color:#ecd4dc;}
.speaker-name{font-family:var(--mono); font-size:.68rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.05em; display:block; margin-bottom:2px;}
.dialogue-sr{font-size:.98rem;}
.dialogue-ru{font-size:.85rem; color:var(--ink-soft); margin-top:3px; display:none; font-style:italic;}
.dialogue-ru.show{display:block;}

/* Vocab grid */
.vocab-grid{display:grid; grid-template-columns:repeat(auto-fill, minmax(190px,1fr)); gap:10px; margin:14px 0;}
.vocab-card{background:var(--paper-soft); border:1px solid var(--line-soft); border-radius:8px; padding:9px 12px;}
.vocab-sr{font-family:var(--mono); font-weight:600; color:var(--brand-ink); font-size:.92rem;}
.vocab-ru{color:var(--ink-soft); font-size:.85rem;}

/* Exercise blocks (shared: reading / listening / practice) */
.ex-section-title{font-size:1.25rem; margin:26px 0 12px; padding-top:6px; border-top:1px dashed var(--line);}
.ex-block{border:1px solid var(--line-soft); border-radius:10px; padding:16px 18px; margin-bottom:16px; background:var(--paper-soft);}
.rule-box{background:var(--brand-tint); border-radius:8px; padding:10px 14px; margin-bottom:14px; font-size:.9rem;}
.rule-label{font-family:var(--mono); font-size:.68rem; text-transform:uppercase; letter-spacing:.06em; color:var(--brand); font-weight:700; display:block; margin-bottom:3px;}
.level-badge{display:inline-block; font-family:var(--mono); font-size:.65rem; background:var(--paper); border:1px solid var(--line); color:var(--ink-soft); border-radius:5px; padding:1px 6px; margin-left:8px; vertical-align:middle;}

.audio-toolbar{display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin-bottom:14px;}
.audio-btn{
  display:inline-flex; align-items:center; gap:6px;
  background:var(--paper); border:1px solid var(--line); border-radius:20px;
  padding:6px 13px; cursor:pointer; font-size:.85rem; color:var(--ink);
}
.audio-btn:hover{border-color:var(--brand); color:var(--brand);}
.audio-btn.playing{background:var(--brand); color:#fff; border-color:var(--brand);}
.transcript-toggle{background:none; border:none; text-decoration:underline; text-underline-offset:2px; color:var(--ink-soft); font-size:.82rem; cursor:pointer; padding:6px 4px;}
.transcript-box{display:none; background:var(--paper); border:1px dashed var(--line); border-radius:8px; padding:10px 14px; margin-bottom:12px; font-size:.92rem; font-family:var(--mono);}
.transcript-box.show{display:block;}

.ex-item{padding:12px 0; border-bottom:1px solid var(--line-soft);}
.ex-item:last-of-type{border-bottom:none;}
.ex-prompt{margin:0 0 10px; font-size:.98rem;}
.ex-prompt .sr{font-family:var(--mono);}
.ex-options{display:flex; flex-direction:column; gap:6px;}
.ex-option{display:flex; align-items:center; gap:9px; padding:7px 10px; border:1px solid var(--line); border-radius:7px; background:var(--paper); cursor:pointer; font-size:.92rem;}
.ex-option:hover{border-color:var(--brand);}
.ex-option input{accent-color:var(--brand);}
.ex-item.checked .ex-option{cursor:default;}
.ex-item.checked .ex-option.opt-correct{border-color:var(--ok); background:var(--ok-tint);}
.ex-item.checked .ex-option.opt-wrong{border-color:var(--err); background:var(--err-tint);}

.blank-input{
  font-family:var(--mono); font-size:.95rem; border:none; border-bottom:2px solid var(--gold);
  background:var(--gold-tint); padding:2px 6px; border-radius:4px 4px 0 0; width:auto; min-width:70px;
  text-align:center;
}
.blank-input:focus{outline:none; border-bottom-color:var(--brand); background:#fff;}
.ex-item.checked .blank-input.b-correct{border-bottom-color:var(--ok); background:var(--ok-tint); color:var(--ok);}
.ex-item.checked .blank-input.b-wrong{border-bottom-color:var(--err); background:var(--err-tint); color:var(--err);}

.dir-badge{display:inline-block; font-family:var(--mono); font-size:.68rem; background:var(--sky-tint); color:var(--sky); border-radius:6px; padding:2px 8px; margin-right:8px; vertical-align:middle;}
.translate-src{font-size:1rem; font-style:italic;}
.translate-input{width:100%; text-align:left; margin-top:8px; display:block; padding:8px 10px; font-size:.95rem;}

.ex-feedback{margin-top:10px; padding:10px 13px; border-radius:8px; font-size:.9rem;}
.ex-feedback.ok{background:var(--ok-tint); color:#1c4e3c;}
.ex-feedback.bad{background:var(--err-tint); color:#7d281d;}
.ex-feedback b{font-weight:700;}

.block-actions{display:flex; align-items:center; gap:12px; margin-top:14px; flex-wrap:wrap;}
.btn{
  border-radius:20px; padding:8px 18px; font-size:.9rem; cursor:pointer; border:1px solid transparent;
}
.btn-check{background:var(--brand); color:#fff; border-color:var(--brand);}
.btn-check:hover{background:var(--brand-ink);}
.btn-retry{background:var(--paper); color:var(--ink); border-color:var(--line);}
.btn-retry:hover{border-color:var(--brand); color:var(--brand);}
.block-score{font-size:.85rem; color:var(--ink-soft); font-family:var(--mono);}
.block-cheer{font-size:.85rem; color:var(--ok);}

/* Vocabulary matching game */
.game-card{background:linear-gradient(135deg, var(--sky-tint), var(--paper)); border:1px solid #cfe1e8; border-radius:12px; padding:18px 20px; margin-bottom:18px;}
.game-title{font-family:var(--serif); font-weight:700; font-size:1.1rem; margin:0 0 4px; color:var(--sky);}
.game-intro{font-size:.88rem; color:var(--ink-soft); margin:0 0 14px;}
.game-grid{display:flex; gap:22px; flex-wrap:wrap;}
.game-col{flex:1 1 200px; display:flex; flex-direction:column; gap:8px;}
.game-chip{
  background:var(--paper); border:1.5px solid var(--line); border-radius:9px;
  padding:9px 13px; cursor:pointer; font-size:.9rem; text-align:left; transition:all .12s ease;
}
.game-chip:hover{border-color:var(--sky);}
.game-chip.selected{border-color:var(--brand); background:var(--brand-tint);}
.game-chip.matched{border-color:var(--ok); background:var(--ok-tint); color:var(--ok); cursor:default; opacity:.85;}
.game-chip.flash-wrong{border-color:var(--err); background:var(--err-tint); animation:shake .3s;}
@keyframes shake{25%{transform:translateX(-3px);}75%{transform:translateX(3px);}}
.game-status-row{display:flex; justify-content:space-between; align-items:center; margin-top:14px; font-size:.85rem; color:var(--ink-soft);}
.game-status{font-weight:700; color:var(--ok);}

/* Assignment card */
.assign-card{background:linear-gradient(135deg,var(--brand-tint),var(--gold-tint)); border:1px solid #ecd9b4; border-radius:12px; padding:20px 22px;}
.assign-title{font-family:var(--serif); font-weight:700; font-size:1.15rem; margin:0 0 12px; color:var(--brand-ink);}
.assign-item{margin-bottom:16px;}
.assign-item:last-child{margin-bottom:0;}
.assign-item h4{font-size:.95rem; margin:0 0 6px; color:var(--ink);}
.assign-item p{margin:0 0 8px; font-size:.92rem;}
.copy-btn{background:var(--paper); border:1px solid var(--line); border-radius:16px; padding:5px 13px; font-size:.8rem; cursor:pointer;}
.copy-btn:hover{border-color:var(--brand); color:var(--brand);}

/* Roadmap */
.roadmap-intro{font-size:.98rem; margin-bottom:18px;}
.roadmap-level{margin-bottom:22px;}
.roadmap-level-title{font-family:var(--mono); font-size:.78rem; text-transform:uppercase; letter-spacing:.08em; color:var(--ink-soft); margin-bottom:8px; padding-bottom:4px; border-bottom:1px solid var(--line-soft);}
.roadmap-row{display:flex; align-items:center; gap:12px; padding:9px 10px; border-radius:8px;}
.roadmap-row:hover{background:var(--paper-soft);}
.roadmap-row.ready{cursor:pointer;}
.roadmap-num{font-family:var(--mono); color:var(--ink-soft); flex:0 0 26px; font-size:.85rem;}
.roadmap-title{flex:0 0 200px; font-weight:600; font-size:.92rem;}
.roadmap-focus{flex:1 1 auto; color:var(--ink-soft); font-size:.85rem;}
.status-pill{flex:0 0 auto; font-family:var(--mono); font-size:.66rem; padding:2px 9px; border-radius:10px;}
.status-pill.ready-pill{background:var(--ok-tint); color:var(--ok);}
.status-pill.soon-pill{background:var(--line-soft); color:var(--ink-soft);}

/* Stub / teaser */
.teaser{color:var(--ink-soft); font-size:.98rem;}
.teaser .example-block{margin-top:16px;}

.progress-note{font-size:.68rem; color:var(--ink-soft);}
.lesson-nav{display:flex; justify-content:space-between; margin-top:8px;}
.nav-btn{background:var(--paper); border:1px solid var(--line); border-radius:8px; padding:9px 16px; cursor:pointer; font-size:.88rem;}
.nav-btn:hover{border-color:var(--brand); color:var(--brand);}
.nav-btn:disabled{opacity:.35; cursor:default;}
.nav-btn:disabled:hover{border-color:var(--line); color:var(--ink);}

/* ---------- Auth pages (login) & admin panel — added for server deployment ---------- */
.user-box{display:flex; align-items:center; gap:12px; font-size:.85rem; color:var(--ink-soft);}
.user-box a{color:var(--brand); text-decoration:none; border-bottom:1px dotted var(--brand);}
.user-box a:hover{color:var(--brand-ink);}

.auth-page{min-height:100vh; display:flex; align-items:center; justify-content:center; background:var(--bg); font-family:var(--sans);}
.auth-card{background:var(--paper); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow); padding:32px 30px; width:100%; max-width:360px;}
.auth-title{font-family:var(--serif); font-weight:700; font-size:1.4rem; color:var(--brand-ink); margin:0 0 4px;}
.auth-sub{color:var(--ink-soft); font-size:.85rem; margin:0 0 20px;}
.auth-field{margin-bottom:14px;}
.auth-field label{display:block; font-size:.82rem; color:var(--ink-soft); margin-bottom:4px;}
.auth-field input{width:100%; padding:9px 11px; border:1px solid var(--line); border-radius:8px; font-size:.95rem; font-family:inherit;}
.auth-field input:focus{outline:none; border-color:var(--brand);}
.auth-btn{width:100%; background:var(--brand); color:#fff; border:none; border-radius:20px; padding:10px; font-size:.95rem; cursor:pointer; margin-top:6px;}
.auth-btn:hover{background:var(--brand-ink);}
.auth-error{background:var(--err-tint); color:#7d281d; border-radius:8px; padding:9px 12px; font-size:.85rem; margin-bottom:14px;}

.admin-wrap{max-width:900px; margin:0 auto; padding:30px 16px;}
.admin-table{width:100%; border-collapse:collapse; background:var(--paper); border:1px solid var(--line); border-radius:10px; overflow:hidden; margin:16px 0;}
.admin-table th, .admin-table td{padding:10px 12px; text-align:left; border-bottom:1px solid var(--line-soft); font-size:.9rem;}
.admin-table th{background:var(--paper-soft); font-family:var(--serif);}
.admin-table tr:last-child td{border-bottom:none;}
.role-badge{font-family:var(--mono); font-size:.7rem; padding:2px 8px; border-radius:10px; background:var(--gold-tint); color:var(--gold);}
.role-badge.admin{background:var(--brand-tint); color:var(--brand);}
.admin-form-inline{display:inline-flex; gap:6px; align-items:center;}
.admin-form-inline select{padding:4px 6px; border-radius:6px; border:1px solid var(--line); font-size:.82rem;}
.admin-btn{border:1px solid var(--line); background:var(--paper); border-radius:14px; padding:4px 11px; font-size:.78rem; cursor:pointer;}
.admin-btn:hover{border-color:var(--brand); color:var(--brand);}
.admin-btn.danger:hover{border-color:var(--err); color:var(--err);}
.new-password-box{background:var(--ok-tint); border:1px solid #bfe0d2; border-radius:10px; padding:14px 16px; margin:16px 0; font-size:.9rem;}
.new-password-box code{font-family:var(--mono); background:#fff; padding:2px 8px; border-radius:5px; font-size:1rem;}
.admin-notice{background:var(--err-tint); color:#7d281d; border-radius:8px; padding:9px 12px; font-size:.85rem; margin:12px 0;}
@media (max-width: 860px){
  .layout{flex-direction:column;}
  .sidebar{
    position:static; flex-direction:row; overflow-x:auto; width:100%;
    gap:6px; padding-bottom:6px; flex:none; max-height:none;
  }
  .side-heading, .side-level-tag{display:none;}
  .side-btn{flex:0 0 auto; white-space:nowrap;}
  .topbar{gap:12px;}
  .card{padding:16px 16px;}
  .roadmap-row{flex-wrap:wrap;}
  .roadmap-title{flex:1 1 100%;}
}