:root, [data-theme="dark"] {
  --bg:#0E1115;--sb:#12161B;--sbBorder:#1E242C;--ink:#DCE2EA;--inkStrong:#F1F5F9;
  --muted:#7E8896;--faint:#566270;--line:#1B2128;--card:#12161B;--cardBorder:#232B34;--cardHover:#161D25;
  --accent:#4E7CA1;--accentDeep:#355A78;--accentLight:#8FB6D4;--navBg:#16202B;--navText:#A9CDE8;
  --chip:#22303C;--chipText:#DCEAF5;--paper:#FBFBF9;--paperHead:#F5F4EF;--paperInk:#23292F;
  --paperInkStrong:#171C21;--paperMuted:#8A8270;--paperRule:#EBE8DF;--paperArt:#F4F6F4;--paperBorder:#00000018;
  --timerVal:#A9CDE8;--timerDot:#5C9A6E;--scrollTrack:#FBFBF9;--scrollThumb:#d5d7d2;--spine:#1E242C;
  --crestInk:#0E1115;--switchBg:#12161B;--switchBorder:#232B34;--readGreen:#6FB089;--readGreenBorder:#2C4A38;
  --red:#ef4444; --green:#22c55e; --amber:#f59e0b;
  --radius:16px; --radius-sm:10px;
  --shadow:0 12px 40px rgba(0,0,0,.45);
}
[data-theme="light"] {
  --bg:#E7EBEF;--sb:#FFFFFF;--sbBorder:#E5E9ED;--ink:#414B58;--inkStrong:#171C22;
  --muted:#76808D;--faint:#9AA4B0;--line:#EAEDF1;--card:#FFFFFF;--cardBorder:#E2E6EB;--cardHover:#F2F6FA;
  --accent:#3D6788;--accentDeep:#2A4A64;--accentLight:#5E8FB6;--navBg:#E9F1F8;--navText:#27557A;
  --chip:#E2ECF4;--chipText:#1F4D70;--paper:#FFFFFF;--paperHead:#F7F8FA;--paperInk:#262C32;
  --paperInkStrong:#12161A;--paperMuted:#8A8E96;--paperRule:#EAEDF0;--paperArt:#F2F6FA;--paperBorder:#E4E8EC;
  --timerVal:#27557A;--timerDot:#3E9D63;--scrollTrack:#FFFFFF;--scrollThumb:#D4DAE1;--spine:#DCE2E9;
  --crestInk:#FFFFFF;--switchBg:#EEF1F4;--switchBorder:#DFE4E9;--readGreen:#2E8157;--readGreenBorder:#BFE0CC;
  --shadow:0 12px 40px rgba(0,0,0,.15);
}

*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  font-family:'Hanken Grotesk',sans-serif;
  background:var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  transition:background .3s;
}
a{color:var(--accentLight);text-decoration:none}
button{font-family:inherit}
.serif{font-family:Lora,Georgia,serif}

/* ---------- layout ---------- */
.shell{display:flex;min-height:100vh}
.sidebar{
  width:256px;flex-shrink:0;background:var(--sb);
  border-right:1px solid var(--sbBorder);padding:24px 16px;display:flex;flex-direction:column;gap:6px;
  position:sticky;top:0;height:100vh;transition:background .3s,border-color .3s;
}
.brand{display:flex;align-items:center;gap:11px;padding:2px 4px 22px;border-bottom:1px solid var(--line);margin-bottom:8px;font-weight:800;font-size:16px;color:var(--inkStrong);line-height:1;letter-spacing:-.2px;}
.brand .logo{width:38px;height:38px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  color:var(--crestInk);background:linear-gradient(160deg,var(--accentLight),var(--accent));}
.brand small{display:block;font-weight:700;font-size:9px;color:var(--accent);letter-spacing:.32em;text-transform:uppercase;margin-top:6px;}

.nav-lbl{font-size:9.5px;font-weight:800;letter-spacing:.24em;text-transform:uppercase;color:var(--faint);padding:12px 10px 6px;}
.nav-item{display:flex;align-items:center;gap:12px;padding:10px 11px;border-radius:8px;font-size:14px;font-weight:600;
  color:var(--muted);cursor:pointer;transition:.16s;white-space:nowrap;border:none;background:none;}
.nav-item:hover{background:var(--cardHover);color:var(--ink);}
.nav-item.active{background:var(--navBg);color:var(--navText);}
.nav-item.active svg{color:var(--accent);}
.nav-item .ic{display:flex;align-items:center;justify-content:center;}
.nav-spacer{flex:1}

.userbox{background:var(--card);border:1px solid var(--cardBorder);border-radius:11px;padding:14px;}
.userbox .uava{width:34px;height:34px;border-radius:8px;background:var(--navBg);color:var(--accent);display:flex;
  align-items:center;justify-content:center;font-weight:800;font-size:14px;float:left;margin-right:11px;}
.userbox .nm{font-size:13.5px;font-weight:700;color:var(--inkStrong);}
.userbox .rl{font-size:11px;color:var(--muted);margin-top:2px;}
.userbox .sair{clear:both;margin-top:13px;width:100%;border:1px solid var(--cardBorder);background:transparent;color:var(--muted);
  padding:9px;border-radius:8px;font-size:12.5px;font-family:inherit;cursor:pointer;transition:.16s;font-weight:600;text-align:center;display:block;}
.userbox .sair:hover{border-color:var(--accent);color:var(--ink);}

.main{flex:1;display:flex;flex-direction:column;min-width:0;padding:28px 40px 22px;}
.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:20px;}
.page-title{font-size:32px;font-weight:800;color:var(--inkStrong);letter-spacing:-.6px;line-height:1;margin:0;}
.page-sub{font-size:12.5px;color:var(--muted);margin-top:8px;font-weight:600;}

/* ---------- cards ---------- */
.card{background:var(--card);border:1px solid var(--cardBorder);
  border-radius:11px;padding:22px;box-shadow:var(--shadow);}
.grid{display:grid;gap:18px}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:1100px){.grid.cols-4{grid-template-columns:repeat(2,1fr)}.grid.cols-3{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}.sidebar{display:none}.main{padding:20px}}

.law-card{cursor:pointer;transition:.18s;position:relative;overflow:hidden;}
.law-card:hover{transform:translateY(-3px);border-color:var(--accent);background:var(--cardHover);}
.law-card .ribbon{position:absolute;top:0;right:0;width:120px;height:120px;
  background:radial-gradient(circle at top right,rgba(143,182,212,.15),transparent 70%)}
.law-card h3{margin:0 0 6px;font-size:18px;color:var(--inkStrong);}
.law-card .desc{color:var(--muted);font-size:13.5px;min-height:38px;}
.progress{height:8px;background:var(--spine);border-radius:99px;overflow:hidden;margin-top:14px}
.progress > i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accentLight));border-radius:99px}
.meta-row{display:flex;justify-content:space-between;color:var(--faint);font-size:12.5px;margin-top:8px}

/* ---------- stat ---------- */
.stat{display:flex;flex-direction:column;gap:6px}
.stat .v{font-size:30px;font-weight:800;line-height:1;color:var(--inkStrong);}
.stat .l{color:var(--muted);font-size:13px}
.stat .ic{color:var(--accent);}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;padding:11px 16px;border-radius:9px;border:1px solid var(--cardBorder);
  background:var(--card);color:var(--ink);font-weight:600;font-size:13.5px;cursor:pointer;transition:.16s;white-space:nowrap;}
.btn:hover{border-color:var(--accent);color:var(--accentLight);background:var(--cardHover);}
.btn svg{color:var(--accent);}
.btn.primary{background:linear-gradient(160deg,var(--accentLight),var(--accentDeep));border:0;color:#fff;box-shadow:0 10px 22px -10px var(--accentDeep);}
.btn.primary:hover{filter:brightness(1.06);color:#fff;}
.btn.primary svg{color:#fff;}
.btn.ghost{background:transparent;border:none;}
.btn.ghost:hover{background:var(--cardHover);}
.btn.sm{padding:8px 13px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-row{display:flex;gap:10px;flex-wrap:wrap}

.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:99px;font-size:12px;font-weight:600;
  background:var(--card);border:1px solid var(--cardBorder);color:var(--muted)}
.badge.mock{background:rgba(245,158,11,.12);border-color:rgba(245,158,11,.4);color:var(--amber);}
.badge.ok{background:rgba(34,197,94,.12);border-color:rgba(34,197,94,.4);color:var(--green);}

/* ---------- auth ---------- */
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}
.auth-card{width:100%;max-width:420px}
.auth-logo{text-align:center;margin-bottom:22px}
.auth-logo .logo{width:60px;height:60px;border-radius:18px;margin:0 auto 12px;display:grid;place-items:center;
  background:linear-gradient(160deg,var(--accentLight),var(--accent));color:var(--crestInk);box-shadow:0 10px 30px rgba(78,124,161,.45)}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:600;}
.input{width:100%;padding:12px 14px;border-radius:9px;border:1px solid var(--cardBorder);background:var(--bg);
  color:var(--inkStrong);font-size:15px;outline:none;transition:.15s}
.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(78,124,161,.18)}
textarea.input{resize:vertical;min-height:90px;font-family:inherit}
select.input{appearance:none}
.switch-line{text-align:center;margin-top:16px;color:var(--muted);font-size:14px}

/* ---------- study / reader ---------- */
.reader-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:18px}
.timer{display:flex;align-items:stretch;border:1px solid var(--cardBorder);border-radius:11px;overflow:hidden;background:var(--card);}
.timer .tinner{padding:10px 16px;display:flex;align-items:center;gap:11px;}
.timer .dot{width:7px;height:7px;border-radius:50%;background:var(--timerDot);}
.timer .clock{font-family:'Spline Sans Mono',monospace;font-size:20px;color:var(--timerVal);letter-spacing:.5px;line-height:1;}
.timer .tlbl{font-size:9.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin-top:4px;}
.timer.paused .dot{background:var(--amber);}

.pager{display:flex;align-items:center;gap:14px}
.pager .btn.ghost{border:1px solid var(--cardBorder);background:var(--card);}
.page-text{font-size:17.5px;line-height:1.66;white-space:pre-wrap;color:var(--inkStrong);
  max-height:54vh;overflow:auto;padding-right:10px;}
.page-text::-webkit-scrollbar{width:8px}.page-text::-webkit-scrollbar-thumb{background:var(--cardBorder);border-radius:8px}

.page-text.paper{width:100%;max-width:780px;background:var(--paper);border-radius:5px;border:1px solid var(--paperBorder);
  box-shadow:0 24px 60px -30px #00000080;padding:42px 52px 60px;color:var(--paperInk);}
.page-text.paper::-webkit-scrollbar{width:12px;}
.page-text.paper::-webkit-scrollbar-thumb{background:var(--scrollThumb);border-radius:6px;border:3px solid var(--scrollTrack);}

/* Leitor do PDF original (formatação real) */
.pdf-wrap{max-height:62vh;overflow:auto;background:var(--bg);border-radius:5px;padding:16px;border:1px solid var(--paperBorder);
  display:flex;justify-content:center;align-items:flex-start}
.pdf-wrap::-webkit-scrollbar{width:12px}.pdf-wrap::-webkit-scrollbar-thumb{background:var(--scrollThumb);border-radius:6px;border:3px solid var(--scrollTrack);}
.pdf-canvas{background:#fff;box-shadow:0 6px 22px rgba(0,0,0,.15);border-radius:4px;max-width:100%}
.tools{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px;}

/* ---------- questions ---------- */
.q{border:1px solid var(--cardBorder);border-radius:11px;padding:18px;margin-bottom:14px;background:var(--card)}
.q .stmt{font-weight:600;margin-bottom:12px;line-height:1.5;color:var(--inkStrong);}
.opt{display:flex;gap:10px;align-items:flex-start;padding:11px 14px;border:1px solid var(--cardBorder);border-radius:9px;
  margin-bottom:9px;cursor:pointer;transition:.12s;background:var(--bg);}
.opt:hover{border-color:var(--accent)}
.opt.sel{border-color:var(--accent);background:var(--cardHover);}
.opt.correct{border-color:var(--readGreen);background:var(--bg);}
.opt.wrong{border-color:var(--red);background:var(--bg);}
.opt .mk{width:24px;height:24px;border-radius:50%;border:1px solid var(--cardBorder);display:grid;place-items:center;
  flex-shrink:0;font-size:13px;font-weight:700;color:var(--muted);}
.opt.sel .mk{background:var(--accent);border-color:var(--accent);color:#fff}
.opt.correct .mk{background:var(--readGreen);border-color:var(--readGreen);color:#fff}
.opt.wrong .mk{background:var(--red);border-color:var(--red);color:#fff}
.explain{margin-top:8px;font-size:13.5px;color:var(--muted);background:var(--cardHover);border-radius:9px;padding:10px 12px;border-left:3px solid var(--accent)}

/* ---------- flashcards ---------- */
.flash{perspective:1200px}
.flash-inner{position:relative;height:230px;transition:transform .6s;transform-style:preserve-3d;cursor:pointer}
.flash.flipped .flash-inner{transform:rotateY(180deg)}
.flash-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:11px;padding:26px;display:grid;
  place-items:center;text-align:center;border:1px solid var(--cardBorder);font-size:17px;line-height:1.5;}
.flash-front{background:var(--card);color:var(--inkStrong);}
.flash-back{background:linear-gradient(160deg,var(--navBg),var(--card));transform:rotateY(180deg);color:var(--inkStrong);}
.flash-tag{position:absolute;top:12px;left:14px;font-size:11px;color:var(--faint);text-transform:uppercase;letter-spacing:.1em}

/* ---------- level meter ---------- */
.level-badge{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;border-radius:99px;font-weight:700;font-size:15px;background:var(--card);border:1px solid var(--cardBorder);}
.ring{--p:0;--c:var(--accent);width:140px;height:140px;border-radius:50%;display:grid;place-items:center;
  background:conic-gradient(var(--c) calc(var(--p)*1%),var(--line) 0);position:relative}
.ring::before{content:"";position:absolute;inset:12px;border-radius:50%;background:var(--card)}
.ring .pv{position:relative;font-size:30px;font-weight:800;color:var(--inkStrong);}
.bar{height:10px;background:var(--spine);border-radius:99px;overflow:hidden;margin-top:8px}
.bar > i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--accentLight))}

/* ---------- misc ---------- */
.empty{text-align:center;padding:60px 20px;color:var(--muted)}
.empty .big{font-size:46px;margin-bottom:10px}
.spinner{width:34px;height:34px;border:3px solid var(--cardBorder);border-top-color:var(--accent);border-radius:50%;
  animation:spin .8s linear infinite;margin:30px auto}
@keyframes spin{to{transform:rotate(360deg)}}
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(40px);opacity:0;
  background:var(--navBg);border:1px solid var(--cardBorder);color:var(--navText);padding:13px 20px;border-radius:9px;
  box-shadow:var(--shadow);transition:.3s;z-index:99;max-width:90vw;font-size:14px;font-weight:600;}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.err{border-color:var(--red);color:var(--red);}
.toast.ok{border-color:var(--readGreen);color:var(--readGreen);}
.modal-bg{position:fixed;inset:0;background:rgba(5,8,18,.7);display:grid;place-items:center;z-index:50;padding:20px}
.modal{max-width:480px;width:100%;background:var(--card);border:1px solid var(--cardBorder);border-radius:11px;padding:22px;box-shadow:var(--shadow);}
.divider{height:1px;background:var(--line);margin:18px 0}
.hint{font-size:13px;color:var(--faint)}
.list-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.list-row:last-child{border-bottom:0}

/* ---------- mode-toggle (layout premium) ---------- */
.mode-toggle {
  margin-top:auto;display:flex;gap:4px;background:var(--switchBg);border:1px solid var(--switchBorder);
  border-radius:10px;padding:4px;margin-bottom:14px;
}
.mode-toggle .btn {
  flex:1;display:flex;align-items:center;justify-content:center;gap:7px;padding:8px;border-radius:7px;
  border:none;background:none;color:var(--muted);font-family:inherit;font-size:12.5px;font-weight:600;cursor:pointer;transition:.16s;box-shadow:none;
}
.mode-toggle .btn.active {
  background:var(--card);color:var(--inkStrong);box-shadow:0 1px 3px #0000001f;
}
[data-theme="light"] .mode-toggle .btn.active {
  box-shadow:0 1px 2px #00000012;
}