/* =====================================================================
   UpLimits — Área do Aluno (login, dashboard, exercícios)
   Depende de styles.css (tokens e componentes base).
   ===================================================================== */

/* Estilos do login (.auth*, .login-modal) ficam em styles.css,
   pois o modal abre nas páginas públicas que não carregam este arquivo. */

/* ---------- Student topbar ---------- */
.stu-topbar{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid #E9ECF2}
.stu-bar{height:var(--header-h);display:flex;align-items:center;gap:18px}
.stu-bar .brand img{height:46px}
.stu-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.stu-chip{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);padding:9px 15px;border-radius:11px;font-weight:700;font-size:13.5px;color:var(--ink)}
.stu-chip i{color:var(--red)}
.stu-chip.dark{background:var(--ink);color:#fff}
.stu-chip.dark i{color:#5fa8ff}
.stu-hello{font-weight:700;font-size:14.5px;color:var(--ink)}
.stu-out{display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 15px;border-radius:11px;border:1px solid var(--line);color:var(--muted-2);font-weight:600;font-size:14px;transition:.2s}
.stu-out:hover{background:#f2f4f8;color:var(--red)}
.stu-greeting{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:clamp(24px,3vw,36px) 0}
.stu-greeting h1{font-family:var(--font-head);font-size:clamp(25px,3.2vw,36px);font-weight:800;color:var(--ink)}
.stu-greeting p{font-size:15px;color:var(--muted);margin-top:6px;max-width:520px}
@media(max-width:720px){ .stu-chip,.stu-hello{display:none} }

/* ---------- Dashboard ---------- */
.dash{background:var(--bg-soft);min-height:60vh;padding:clamp(28px,4vw,44px) 0 80px}

.continue-card{position:relative;background:linear-gradient(120deg,var(--navy),var(--navy-2));border-radius:22px;
  padding:clamp(24px,3vw,32px);color:#fff;overflow:hidden;margin-bottom:32px;
  display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap}
.continue-card::before{content:"";position:absolute;top:-60px;right:-20px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(225,29,43,.38),transparent 65%);filter:blur(20px)}
.cc-text{position:relative;flex:1;min-width:260px}
.cc-kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#ff8a90;font-weight:700;margin-bottom:10px}
.cc-module{font-size:13px;color:rgba(255,255,255,.6);font-weight:600;margin-bottom:4px}
.cc-text h2{font-family:var(--font-head);font-size:clamp(20px,2.4vw,26px);font-weight:700;line-height:1.2;margin-bottom:18px;max-width:460px}
.cc-bar{height:8px;background:rgba(255,255,255,.14);border-radius:6px;overflow:hidden;max-width:420px;margin-bottom:9px}
.cc-bar span{display:block;height:100%;background:linear-gradient(90deg,var(--red),#ff6b73);border-radius:6px}
.cc-prog{font-size:13px;color:rgba(255,255,255,.6)}
.continue-card .btn{position:relative;white-space:nowrap}

.lib-head{display:flex;justify-content:space-between;align-items:flex-end;gap:18px;flex-wrap:wrap;margin-bottom:20px}
.lib-sub{font-size:14.5px;color:var(--muted);margin-top:6px}
.lib-sub strong{color:var(--red);font-family:var(--font-head);font-size:16px}
.lib-search{display:flex;align-items:center;gap:10px;background:#fff;border:1.5px solid var(--line);border-radius:13px;padding:0 14px;width:min(360px,100%)}
.lib-search i{color:var(--faint)}
.lib-search input{flex:1;min-width:0;border:0;outline:none;background:none;font-size:14.5px;color:var(--ink);padding:13px 0}
.search-clear{border:0;background:none;cursor:pointer;color:var(--faint);display:grid;place-items:center;padding:0}

.lib-filters{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:22px}
.filter-chip{border:1.5px solid var(--line);background:#fff;color:var(--muted-2);padding:10px 18px;border-radius:11px;font-weight:700;font-size:14px;cursor:pointer;transition:.18s}
.filter-chip:hover{border-color:#c8d0db}
.filter-chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}

.lib-empty{text-align:center;padding:60px 20px;color:var(--faint)}
.lib-empty p{font-size:16px;margin-top:14px;font-weight:600}

.lib-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.lib-card{display:flex;flex-direction:column;gap:14px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;cursor:pointer;transition:.24s}
.lib-card:hover{transform:translateY(-5px);box-shadow:0 20px 44px rgba(10,22,38,.1);border-color:#d6dbe4}
.lib-card.locked{opacity:.55;cursor:default;pointer-events:none}
.lib-card-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.cat-chip{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;color:var(--cat,#1f63e0);background:var(--bg-soft);padding:5px 11px;border-radius:999px}
.st-chip{font-size:11.5px;font-weight:700;padding:5px 11px;border-radius:999px;white-space:nowrap}
.st-go{background:var(--ink);color:#fff}
.st-done{background:#e9f7ef;color:#0c5132}
.st-free{background:var(--red);color:#fff}
.st-soon{background:#eef1f6;color:var(--faint)}
.lib-card h3{font-family:var(--font-head);font-size:18px;font-weight:700;color:var(--ink);line-height:1.25;flex:1}
.lib-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--faint);font-weight:600;margin-bottom:6px}
.lib-pct{color:var(--bar,var(--red))}
.lib-bar{height:6px;background:#eef1f6;border-radius:5px;overflow:hidden}
.lib-bar span{display:block;height:100%;background:var(--bar,var(--red));border-radius:5px;transition:width .6s}

/* ---------- Exercises ---------- */
.ex-wrap{background:var(--bg-soft);min-height:90vh;padding:clamp(24px,4vw,40px) 0 70px}
.ex-inner{max-width:780px;margin:0 auto;padding:0 clamp(16px,4vw,28px)}

.ex-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}
.ex-back{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-weight:600;font-size:14px;transition:.2s}
.ex-back:hover{color:var(--red)}
.ex-module{font-size:13.5px;font-weight:700;color:var(--ink)}
.ex-progress{height:9px;background:#e1e6ee;border-radius:6px;overflow:hidden;margin-bottom:26px}
.ex-progress span{display:block;height:100%;background:linear-gradient(90deg,var(--red),#ff6b73);border-radius:6px;transition:width .45s cubic-bezier(.4,0,.2,1)}

.ex-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(24px,4vw,38px);box-shadow:0 10px 30px rgba(10,22,38,.05)}
.ex-card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px}
.ex-type{display:inline-flex;align-items:center;gap:8px;background:var(--red-soft);color:var(--red);padding:8px 14px;border-radius:999px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em}
.ex-count{font-size:13px;font-weight:700;color:var(--faint)}
.ex-instr{font-size:15px;color:var(--muted);font-weight:500;margin-bottom:24px}

/* fill */
.ex-fill{font-size:clamp(19px,2.8vw,26px);font-weight:600;color:var(--ink);line-height:1.9;display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.fill-input{border:0;border-bottom:2.5px solid #cdd5e0;background:#f6f8fb;border-radius:8px 8px 0 0;padding:6px 14px;min-width:160px;text-align:center;font-family:var(--font-body);font-weight:700;font-size:inherit;color:var(--red);outline:none}
.fill-input.ok{border-bottom-color:var(--green)}
.fill-input.no{border-bottom-color:var(--red)}

/* text options */
.ex-question{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:16px}
.ex-opts{display:flex;flex-direction:column;gap:12px}
.opt{display:flex;align-items:center;gap:14px;text-align:left;padding:15px 18px;border:2px solid var(--line);background:#fff;color:var(--ink);border-radius:14px;cursor:pointer;font-size:15.5px;font-weight:600;transition:.16s;font-family:var(--font-body)}
.opt:hover{border-color:#c8d0db}
.opt.selected{background:var(--ink);border-color:var(--ink);color:#fff}
.opt.correct{background:#e9f7ef;border-color:var(--green);color:#0c5132}
.opt.wrong{background:var(--red-soft);border-color:var(--red);color:#8a0f17}
.opt-letter{width:28px;height:28px;border-radius:50%;border:1.5px solid currentColor;display:grid;place-items:center;font-size:13px;font-weight:800;flex-shrink:0}
.opt-label{flex:1}

/* listen */
.ex-listen{display:flex;flex-direction:column;align-items:center;gap:14px;margin-bottom:26px}
.play-btn{width:90px;height:90px;border-radius:50%;background:var(--red);color:#fff;border:0;cursor:pointer;display:grid;place-items:center;box-shadow:0 14px 34px rgba(225,29,43,.42);animation:pulseRing 2.6s infinite;transition:transform .2s}
.play-btn:hover{transform:scale(1.06)}
.play-again{display:inline-flex;align-items:center;gap:7px;background:none;border:0;color:var(--muted);font-family:var(--font-body);font-weight:600;font-size:14px;cursor:pointer}

/* image options */
.ex-imgs{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.ex-imgs .opt,.ex-imgs button{position:relative;padding:0;border:3px solid var(--line);border-radius:16px;overflow:hidden;cursor:pointer;background:#fff;transition:.16s;display:block}
.ex-imgs .opt.selected{border-color:var(--ink)}
.ex-imgs .opt.correct{border-color:var(--green)}
.ex-imgs .opt.wrong{border-color:var(--red)}
.img-ph{aspect-ratio:4/3;display:grid;place-items:center;border-radius:0}
.img-flag{position:absolute;top:8px;right:8px;width:28px;height:28px;border-radius:50%;color:#fff;display:grid;place-items:center}
.img-flag.ok{background:var(--green)}
.img-flag.no{background:var(--red)}

/* pdf */
.ex-pdf{display:flex;flex-direction:column;align-items:center;text-align:center;gap:18px;padding:8px 0}
.pdf-ic{width:84px;height:84px;border-radius:20px;background:var(--red-soft);color:var(--red);display:grid;place-items:center}
.ex-pdf h3{font-family:var(--font-head);font-size:20px;font-weight:700;color:var(--ink);margin-bottom:8px}
.ex-pdf p{font-size:14.5px;line-height:1.6;color:var(--muted);max-width:420px}

/* feedback */
.ex-fb{display:flex;align-items:center;gap:12px;margin-top:24px;padding:15px 18px;border-radius:14px;border:1.5px solid}
.ex-fb.ok{background:#e9f7ef;border-color:var(--green);color:#0c5132}
.ex-fb.no{background:var(--red-soft);border-color:var(--red);color:#8a0f17}
.ex-fb span{font-weight:700;font-size:15px}

.ex-actions{margin-top:22px;display:flex;justify-content:flex-end}
.btn.is-disabled{background:#c3cad6;box-shadow:none;cursor:not-allowed;transform:none}

/* done */
.ex-done{background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(40px,6vw,56px) 32px;text-align:center;box-shadow:0 16px 44px rgba(10,22,38,.08)}
.done-badge{width:92px;height:92px;border-radius:50%;background:linear-gradient(135deg,var(--green),#36c587);color:#fff;display:grid;place-items:center;margin:0 auto 24px;box-shadow:0 14px 34px rgba(31,138,91,.4);animation:pulseRing 2.4s infinite}
.ex-done h2{font-family:var(--font-head);font-size:clamp(26px,3.4vw,38px);font-weight:800;color:var(--ink);margin-bottom:12px}
.ex-done p{font-size:17px;color:var(--muted);margin-bottom:20px}
.done-score{color:var(--green);font-size:20px}
.done-xp{display:inline-flex;align-items:center;gap:8px;background:var(--red-soft);color:var(--red);padding:10px 20px;border-radius:999px;font-weight:800;font-size:15px}
.done-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:30px}