:root{
    --bg:#F2FAF6; --panel:#FFFFFF; --card-bg:#E3F5EC; --ink:#103024; --muted:#5E7C6F;
    --accent:#A9E8C8; --accent-strong:#1E8F5E; --accent-dim:#DFF5E9; --bad:#C24632; --warn:#B9791F; --line:#D7EAE1;
    --accent-text:#103024; --topbar-bg:#123B2E; --topbar-ink:#DCEFE6;
  }
  body.dark-theme{
    --bg:#0F1A15; --panel:#16241D; --card-bg:#1B2E24; --ink:#E7F5EE; --muted:#8FAA9C;
    --accent:#2B6E4C; --accent-strong:#5FD79A; --accent-dim:#20372A; --bad:#E06A54; --warn:#E0A94F; --line:#26392F;
    --accent-text:#0F1A15; --topbar-bg:#0A1712; --topbar-ink:#CFEBDD;
  }
  body{ transition: background .2s, color .2s; }
  *{box-sizing:border-box}
  body{
    margin:0; background:var(--bg); color:var(--ink);
    font-family:'Georgia','Iowan Old Style',serif; min-height:100vh;
    display:flex; flex-direction:column; align-items:center;
  }
  #app-root{ width:100%; display:flex; flex-direction:column; }
  .topbar{
    width:100%; background:var(--topbar-bg);
    display:flex; justify-content:space-between; align-items:center;
    padding:14px 28px; font-family:Arial,sans-serif; box-sizing:border-box;
  }
  .topbar .brand{ font-family:Georgia,serif; font-size:19px; color:#fff; font-weight:normal; }
  .topbar .brand span{ color:var(--accent); font-weight:bold; }
  .main-nav{ display:flex; gap:6px; flex-wrap:wrap; }
  .nav-pill{ color:var(--topbar-ink); text-decoration:none; font-size:13px; padding:9px 18px; border-radius:20px; transition:background .15s, color .15s; }
  .nav-pill:hover{ background:rgba(255,255,255,0.1); }
  .nav-pill.active{ background:var(--accent); color:var(--accent-text); font-weight:bold; }
  .account-area{ position:relative; }
  .account-btn{ background:rgba(255,255,255,0.12); color:#fff; border:1px solid rgba(255,255,255,0.3); border-radius:20px; padding:9px 16px; font-family:Arial,sans-serif; font-size:12px; cursor:pointer; }
  .account-btn:hover{ background:rgba(255,255,255,0.22); }
  .account-dropdown{ position:absolute; top:46px; right:0; background:#fff; border-radius:12px; padding:10px; box-shadow:0 6px 24px rgba(0,0,0,0.18); min-width:210px; z-index:30; }
  .account-dropdown #user-email{ font-size:11px; color:var(--muted); padding:6px 8px 10px; border-bottom:1px solid var(--line); margin-bottom:8px; word-break:break-all; font-family:Arial,sans-serif; }
  .account-dropdown .btn{ width:100%; margin:0; }
  .app-layout{ width:100%; display:flex; align-items:flex-start; flex:1; }
  .sidebar{ width:210px; flex-shrink:0; background:var(--panel); border-right:1px solid var(--line); padding:22px 14px; min-height:calc(100vh - 62px); box-sizing:border-box; }
  .sidebar.hidden{ display:none; }
  .ws-switcher{ display:flex; gap:6px; margin-bottom:22px; }
  .ws-btn{ flex:1; background:none; border:1px solid var(--line); color:var(--muted); padding:8px 4px; border-radius:14px; font-family:Arial,sans-serif; font-size:11px; cursor:pointer; }
  .ws-btn.active{ border-color:var(--accent-strong); color:var(--accent-strong); background:var(--accent-dim); font-weight:bold; }
  .side-nav{ display:flex; flex-direction:column; gap:4px; }
  .side-link{ color:var(--muted); text-decoration:none; font-family:Arial,sans-serif; font-size:13px; padding:10px 12px; border-radius:10px; transition:background .15s, color .15s; }
  .side-link:hover{ background:var(--accent-dim); color:var(--accent-strong); }
  .side-link.active{ background:var(--accent-dim); color:var(--accent-strong); font-weight:bold; }
  .content-wrap{ flex:1; display:flex; flex-direction:column; align-items:center; padding:28px 16px 40px; min-width:0; }
  .panel{ width:100%; max-width:560px; background:var(--panel); border-radius:20px; padding:24px; border:1px solid var(--line); box-shadow:0 2px 12px rgba(16,48,36,0.05); }
  .session-bar{
    display:flex; flex-direction:column; align-items:center; text-align:center;
    background:var(--accent-dim); border-radius:16px; padding:14px; margin-bottom:18px; font-family:Arial,sans-serif;
  }
  .session-bar .counter{ font-size:16px; font-weight:bold; color:var(--ink); }
  .session-bar .deckname{ font-size:12px; color:var(--muted); margin-top:2px; }
  .stat-row{ display:flex; justify-content:space-between; font-family:Arial,sans-serif; font-size:11px; color:var(--muted); margin-bottom:18px; flex-wrap:wrap; gap:8px; }
  .stat-row b{ color:var(--ink); font-size:16px; display:block; font-family:Georgia,serif; }
  .card{ background:var(--card-bg); border:1px solid var(--line); border-radius:22px; min-height:300px; display:flex; align-items:center; justify-content:center; text-align:center; font-size:clamp(20px, 4vw, 34px); padding:40px 28px 54px; cursor:pointer; user-select:none; margin-bottom:0; position:relative; line-height:1.4; word-wrap:break-word; overflow-wrap:break-word; hyphens:auto; max-width:100%; }
  .panel-wide{ max-width:960px !important; }
  .card .hint{ position:absolute; bottom:0; left:0; right:0; background:var(--accent-dim); color:var(--accent-strong); font-size:12px; padding:12px; font-family:Arial,sans-serif; letter-spacing:0.3px; text-transform:none; }
  .card .answer{ color:var(--accent-strong); font-size:clamp(16px, 2.6vw, 24px); }
  .icon-round{ width:32px; height:32px; border-radius:50%; border:1px solid var(--line); background:var(--panel); display:inline-flex; align-items:center; justify-content:center; cursor:pointer; color:var(--muted); font-size:14px; transition:border-color .15s, color .15s; }
  .icon-round:hover{ border-color:var(--accent-strong); color:var(--accent-strong); }
  .below-card-row{ display:flex; justify-content:flex-end; align-items:center; margin-top:16px; font-family:Arial,sans-serif; }
  .dict-links{ display:flex; gap:8px; justify-content:center; margin-top:14px; }
  .dict-link{ font-family:Arial,sans-serif; font-size:11px; color:var(--accent-strong); text-decoration:none; border:1px solid var(--line); padding:6px 14px; border-radius:20px; transition:border-color .15s; }
  .dict-link:hover{ border-color:var(--accent-strong); }
  .icon-row{ display:flex; gap:8px; }
  .cloze-blank{ color:var(--accent-strong); font-weight:bold; }
  .cloze-answer{ color:var(--accent-strong); font-weight:bold; text-decoration:underline; }
  .grade-row{ display:flex; gap:8px; }
  .grade{ flex:1; padding:14px 4px; border:none; border-radius:24px; font-family:Arial,sans-serif; font-size:13px; cursor:pointer; color:#fff; transition:transform .1s, opacity .15s; }
  .grade:hover:not(:disabled){ transform:translateY(-1px); opacity:.92; }
  .g-again{background:var(--bad);} .g-hard{background:#C4862E;}
  .g-good{background:var(--accent-dim); color:var(--accent-strong);} .g-easy{background:var(--accent); color:var(--accent-text);}
  .grade:disabled{opacity:.3; cursor:default;}
  .grade small{ display:block; font-size:10px; opacity:.85; font-weight:normal; margin-top:2px; }
  textarea{ width:100%; min-height:180px; background:var(--bg); color:var(--ink); border:1px solid var(--line); border-radius:8px; font-family:'Courier New',monospace; font-size:13px; padding:12px; resize:vertical; }
  .btn{ margin-top:10px; background:var(--accent); color:var(--accent-text); border:none; padding:10px 18px; border-radius:24px; font-family:Arial,sans-serif; font-size:12px; cursor:pointer; font-weight:bold; transition:transform .1s, opacity .15s; }
  .btn:hover{ transform:translateY(-1px); opacity:.92; }
  .btn.secondary:hover{ border-color:var(--accent-strong); color:var(--accent-strong); }
  .btn.secondary{ background:none; border:1px solid var(--line); color:var(--muted); }
  .field-label{ font-family:Arial,sans-serif; font-size:11px; color:var(--muted); margin:14px 0 6px; text-transform:uppercase; letter-spacing:1px; }
  select, input[type=text], input[type=email], input[type=password]{
    background:var(--bg); color:var(--ink); border:1px solid var(--line); border-radius:6px; padding:8px; font-family:Arial,sans-serif; width:100%;
  }
  .empty{ text-align:center; color:var(--muted); font-family:Arial,sans-serif; font-size:14px; padding:40px 0; }
  .row-btns{ display:flex; gap:8px; flex-wrap:wrap; }
  .list-mini{ font-family:Arial,sans-serif; font-size:12px; color:var(--muted); max-height:260px; overflow-y:auto; margin-top:12px; }
  .word-row{ display:flex; justify-content:space-between; align-items:flex-start; padding:8px 0; border-bottom:1px solid var(--line); gap:8px; }
  .word-row .w{flex:1;}
  .sub-badges{ display:flex; gap:4px; flex-wrap:wrap; margin-top:4px; }
  .badge, .sub-badge{ font-size:9px; padding:2px 6px; border-radius:10px; text-transform:uppercase; letter-spacing:0.5px; white-space:nowrap; }
  .b-new{background:rgba(16,48,36,0.06); color:var(--muted);} .b-learning{background:rgba(185,121,31,0.15); color:var(--warn);}
  .b-review{background:rgba(30,143,94,0.12); color:var(--accent-strong);} .b-mastered{background:rgba(30,143,94,0.22); color:var(--accent-strong); font-weight:bold;}
  .b-suspended{background:rgba(194,70,50,0.15); color:var(--bad);}
  .sub-badge{cursor:pointer;}
  .tag-chip{ font-size:9px; padding:2px 8px; border-radius:10px; border:1px solid var(--line); color:var(--muted); font-family:Arial,sans-serif; margin:2px 4px 0 0; display:inline-block; }
  .tag-leech{ color:var(--bad); border-color:var(--bad); }
  .icon-btn{ background:none; border:none; color:var(--muted); cursor:pointer; font-size:13px; }
  .icon-btn:hover{ color:var(--ink); }
  .deck-pill{ display:inline-block; padding:3px 10px; border-radius:12px; font-size:11px; border:1px solid var(--line); color:var(--muted); margin:2px 4px 2px 0; cursor:pointer; font-family:Arial,sans-serif; }
  .deck-pill.active{ border-color:var(--accent-strong); color:var(--accent-strong); background:var(--accent-dim); }
  .calendar-row{ display:flex; justify-content:space-between; font-family:Arial,sans-serif; font-size:12px; padding:6px 0; border-bottom:1px solid var(--line); color:var(--muted); }
  .calendar-row b{color:var(--ink);}
  .streak{ font-family:Arial,sans-serif; text-align:center; margin-bottom:16px; }
  .streak .num{ font-size:32px; color:var(--accent-strong); font-family:Georgia,serif; }
  .streak .lbl{ font-size:11px; color:var(--muted); text-transform:uppercase; letter-spacing:1px; }
  .edit-form{ display:none; gap:6px; margin-top:6px; }
  .edit-form.open{ display:flex; }
  .edit-form input{ font-size:12px; padding:5px; }
  .auth-box{ text-align:center; }
  .auth-box input{ margin-bottom:10px; }
  .error-msg{ color:var(--bad); font-family:Arial,sans-serif; font-size:12px; margin-top:8px; }
  .hidden{ display:none !important; }
  .config-warning{ max-width:560px; background:#FBF0DD; border:1px solid var(--warn); color:#8A5A10; padding:14px; border-radius:8px; font-family:Arial,sans-serif; font-size:12px; margin-bottom:16px; line-height:1.5; }
  .note-type-row{ display:flex; gap:16px; font-family:Arial,sans-serif; font-size:13px; margin-bottom:6px; flex-wrap:wrap; }
  .note-type-row label{ display:flex; align-items:center; gap:6px; cursor:pointer; }
  /* ---------- RESPONSYWNOŚĆ / MOBILE ---------- */
  @media (max-width: 860px){
    .topbar{ padding:10px 14px; flex-wrap:wrap; gap:8px; }
    .topbar .brand{ font-size:17px; }
    .main-nav{ order:3; width:100%; overflow-x:auto; flex-wrap:nowrap; -webkit-overflow-scrolling:touch; padding-bottom:2px; }
    .main-nav::-webkit-scrollbar{ display:none; }
    .nav-pill{ padding:8px 13px; font-size:12px; white-space:nowrap; flex-shrink:0; }
    .account-btn{ padding:8px 12px; font-size:11px; }
    .account-dropdown{ min-width:180px; right:0; max-width:calc(100vw - 28px); }

    .app-layout{ flex-direction:column; align-items:stretch; }
    .sidebar{ width:100%; box-sizing:border-box; min-height:auto; border-right:none; border-bottom:1px solid var(--line); padding:12px 14px; }
    .ws-switcher{ margin-bottom:12px; max-width:320px; }
    .side-nav{ flex-direction:row; overflow-x:auto; -webkit-overflow-scrolling:touch; gap:6px; padding-bottom:2px; }
    .side-nav::-webkit-scrollbar{ display:none; }
    .side-link{ white-space:nowrap; flex-shrink:0; padding:9px 12px; font-size:12px; }

    .content-wrap{ padding:14px 10px 32px; }
    .panel{ padding:16px 14px; border-radius:16px; }
    .panel-wide{ max-width:100% !important; }

    .card{ min-height:220px; padding:28px 18px 48px; border-radius:18px; }
    .session-bar{ flex-wrap:wrap; gap:2px; }

    /* Karta w Trybie nauki: zawsze na (prawie) cały ekran, niezależnie od długości słowa */
    #panel-learn{ padding:10px 12px; }
    #panel-learn #learn-area{ display:flex; flex-direction:column; flex:1; }
    #panel-learn .card{
      flex:1;
      height: calc(100dvh - 260px);
      min-height: 260px;
      max-height: none;
      overflow-y: auto;
      padding:24px 16px 48px;
    }

    .grade{ padding:12px 2px; font-size:12px; border-radius:18px; }
    .grade small{ font-size:9px; }
    .grade-row{ gap:6px; }

    .row-btns{ gap:6px; }
    .btn{ font-size:12px; padding:10px 14px; width:100%; box-sizing:border-box; }
    .row-btns .btn{ width:auto; flex:1 1 auto; }
    .field-label{ font-size:10px; }

    .word-row{ flex-wrap:wrap; }
    .stat-row{ font-size:10px; }
  }
  @media (max-width: 420px){
    .topbar .brand{ font-size:15px; }
    .nav-pill{ padding:7px 10px; font-size:11px; }
    .card{ font-size:18px !important; padding:22px 14px 44px; }
    .grade{ font-size:11px; padding:10px 2px; }
    .grade small{ font-size:8px; }
  }
  @media (hover: none) and (pointer: coarse){
    .grade, .btn, .nav-pill, .side-link, .icon-round, .deck-pill, .sub-badge{ min-height:38px; }
  }