/* Santi — Ciencias (Lecciones 4 y 5) — examen junio 2026. Kid-friendly, bilingüe acentos CR. */
@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&family=Nunito:wght@400;600;700;800&display=swap');

:root{
  --p:#7d4dff; --p2:#9d6bff; --p-dark:#5a32c4;
  --green:#22b07d; --green2:#1a8f64;
  --amber:#ffb020; --red:#ff5b6e; --blue:#2e9bff;
  --bg:#f4f0ff; --card:#ffffff; --ink:#2b2440; --muted:#6b6385;
  --shadow:0 10px 30px rgba(90,50,196,.12); --shadow-sm:0 4px 14px rgba(90,50,196,.10);
  --r:20px;
}
*{box-sizing:border-box}
body{
  margin:0; font-family:'Nunito',system-ui,sans-serif; color:var(--ink);
  background:linear-gradient(160deg,#f6f1ff 0%,#eef6ff 60%,#fff6f0 100%);
  background-attachment:fixed; min-height:100vh; line-height:1.55;
}
h1,h2,h3,.title{font-family:'Fredoka',sans-serif; line-height:1.15; margin:.2em 0}
a{color:var(--p-dark);text-decoration:none}
.wrap{max-width:880px;margin:0 auto;padding:18px 16px 64px}

/* Top bar */
.topbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.topbar .home{background:var(--card);border:2px solid #e6dcff;border-radius:14px;padding:8px 14px;font-weight:800;color:var(--p-dark);box-shadow:var(--shadow-sm)}
.topbar .home:hover{border-color:var(--p)}
.badge{display:inline-flex;align-items:center;gap:6px;background:#fff;border:2px solid #e6dcff;border-radius:999px;padding:5px 12px;font-weight:700;font-size:.85rem;color:var(--p-dark)}

/* Hero */
.hero{background:linear-gradient(135deg,var(--p) 0%,var(--p2) 100%);color:#fff;border-radius:26px;padding:26px 24px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.hero h1{font-size:2.05rem;margin:0 0 6px}
.hero p{margin:0;opacity:.95;font-weight:600}
.hero .emoji{font-size:2.4rem}
.countdown{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.cd-box{background:rgba(255,255,255,.18);border-radius:14px;padding:8px 14px;text-align:center;min-width:70px;backdrop-filter:blur(4px)}
.cd-box b{display:block;font-family:'Fredoka';font-size:1.7rem;line-height:1}
.cd-box span{font-size:.7rem;text-transform:uppercase;letter-spacing:.5px;opacity:.9}

/* Cards / grid */
.grid{display:grid;gap:16px;margin-top:20px}
.grid.cols-3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.card{background:var(--card);border-radius:var(--r);padding:20px;box-shadow:var(--shadow-sm);border:2px solid #efe9ff}
.nav-card{display:block;border-radius:var(--r);padding:22px 20px;color:#fff;box-shadow:var(--shadow);transition:transform .15s ease, box-shadow .15s}
.nav-card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(90,50,196,.22)}
.nav-card .ico{font-size:2.4rem}
.nav-card h3{margin:8px 0 4px;font-size:1.3rem}
.nav-card p{margin:0;font-weight:600;opacity:.95;font-size:.92rem}
.nc-1{background:linear-gradient(135deg,#7d4dff,#9d6bff)}
.nc-2{background:linear-gradient(135deg,#22b07d,#2bd39a)}
.nc-3{background:linear-gradient(135deg,#ff8a3d,#ff5b6e)}
.nc-4{background:linear-gradient(135deg,#2e9bff,#5ad0ff)}

/* Section headings inside lessons */
.lesson-h{display:flex;align-items:center;gap:12px;margin:30px 0 6px}
.lesson-h .chip{background:var(--p);color:#fff;border-radius:12px;padding:4px 12px;font-family:'Fredoka';font-size:.95rem}
.topic{background:var(--card);border-radius:var(--r);padding:18px 20px;box-shadow:var(--shadow-sm);border:2px solid #efe9ff;margin-top:14px}
.topic h3{color:var(--p-dark);display:flex;align-items:center;gap:8px;font-size:1.25rem}
.topic h4{color:var(--green2);margin:14px 0 4px;font-size:1.05rem}
.topic ul{margin:8px 0;padding-left:22px}
.topic li{margin:5px 0}
.key{background:#efe6ff;color:var(--p-dark);border-radius:6px;padding:1px 6px;font-weight:800}
.hl{background:#fff3cf;border-radius:6px;padding:1px 5px;font-weight:700}

/* Definition boxes */
.defbox{border-radius:16px;padding:14px 16px;margin:12px 0;border-left:6px solid var(--p)}
.defbox.green{background:#e9f9f2;border-color:var(--green)}
.defbox.blue{background:#e8f4ff;border-color:var(--blue)}
.defbox.amber{background:#fff6e3;border-color:var(--amber)}
.defbox.red{background:#ffeef0;border-color:var(--red)}
.defbox b{font-family:'Fredoka'}

/* audio button */
.audio-btn{border:none;background:var(--p);color:#fff;border-radius:999px;width:34px;height:34px;font-size:1rem;cursor:pointer;box-shadow:var(--shadow-sm);vertical-align:middle;transition:transform .1s}
.audio-btn:hover{transform:scale(1.12)}
.audio-btn.inline{width:28px;height:28px;font-size:.85rem;margin-left:6px}
.audio-btn.playing{background:var(--green);animation:pulse 1s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 8px rgba(34,176,125,.25)}}
.say{display:flex;align-items:center;gap:8px;background:#f3eeff;border-radius:12px;padding:8px 12px;margin:8px 0;font-weight:600}

/* ===== Gamified quiz ===== */
.hud{position:sticky;top:8px;z-index:20;display:flex;gap:10px;flex-wrap:wrap;align-items:center;background:#fff;border:2px solid #e6dcff;border-radius:16px;padding:10px 14px;box-shadow:var(--shadow);margin-bottom:16px}
.hud .stat{display:flex;align-items:center;gap:6px;font-weight:800;font-family:'Fredoka';color:var(--p-dark)}
.hud .stat .lab{font-size:.7rem;color:var(--muted);font-weight:700;text-transform:uppercase}
.lives{letter-spacing:2px}
.bar{flex:1;min-width:120px;height:14px;background:#eee4ff;border-radius:999px;overflow:hidden}
.bar > i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--green),#2bd39a);transition:width .4s}
.streak-fire{font-size:1.1rem}

.q{background:var(--card);border-radius:var(--r);padding:20px;box-shadow:var(--shadow-sm);border:2px solid #efe9ff;margin-bottom:16px}
.q .qnum{font-size:.78rem;font-weight:800;color:var(--p);text-transform:uppercase;letter-spacing:.5px}
.q .qtext{font-family:'Fredoka';font-size:1.18rem;margin:6px 0 14px;display:flex;align-items:flex-start;gap:8px}
.opts{display:grid;gap:10px}
.opt{display:flex;align-items:center;gap:12px;text-align:left;width:100%;background:#faf7ff;border:2px solid #e9e1ff;border-radius:14px;padding:13px 15px;font-size:1.02rem;font-weight:700;color:var(--ink);cursor:pointer;font-family:'Nunito';transition:all .12s}
.opt:hover:not(:disabled){border-color:var(--p);background:#f3eeff}
.opt .mark{width:30px;height:30px;flex:none;border-radius:9px;border:2px solid #c9b8ff;display:flex;align-items:center;justify-content:center;font-family:'Fredoka';font-weight:700;color:var(--p)}
.opt.correct{background:#e9f9f2;border-color:var(--green)}
.opt.correct .mark{background:var(--green);border-color:var(--green);color:#fff}
.opt.wrong{background:#ffeef0;border-color:var(--red)}
.opt.wrong .mark{background:var(--red);border-color:var(--red);color:#fff}
.opt:disabled{cursor:default;opacity:.95}
.feedback{margin-top:12px;border-radius:12px;padding:10px 14px;font-weight:700;display:none}
.feedback.ok{background:#e9f9f2;color:var(--green2);display:block}
.feedback.no{background:#ffeef0;color:#c0344a;display:block}
.hintbtn{background:none;border:2px dashed #c9b8ff;color:var(--p-dark);border-radius:12px;padding:6px 12px;font-weight:800;cursor:pointer;margin-top:10px;font-family:'Nunito'}
.hint{display:none;margin-top:10px;background:#fff6e3;border-radius:12px;padding:10px 14px;font-weight:600}
.hint.show{display:block}

/* Toast / reward */
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(40px);background:var(--ink);color:#fff;padding:12px 22px;border-radius:999px;font-weight:800;font-family:'Fredoka';box-shadow:var(--shadow);opacity:0;transition:all .3s;z-index:50;pointer-events:none}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}
.toast.good{background:var(--green)} .toast.bad{background:var(--red)} .toast.gold{background:linear-gradient(135deg,#ffb020,#ff8a3d)}

/* Badges */
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.badge-pill{display:flex;align-items:center;gap:6px;background:#f3eeff;border:2px solid #e3d7ff;border-radius:999px;padding:6px 12px;font-weight:800;font-size:.85rem;color:var(--muted);opacity:.45;filter:grayscale(1)}
.badge-pill.earned{opacity:1;filter:none;background:#fff7e6;border-color:var(--amber);color:#9a6b00}

/* Result screen */
.result{display:none;text-align:center;background:var(--card);border-radius:26px;padding:30px 24px;box-shadow:var(--shadow);border:3px solid #efe9ff}
.result.show{display:block}
.result .big{font-size:3.4rem;font-family:'Fredoka'}
.result .medal{font-size:4rem}
.btn{display:inline-block;background:var(--p);color:#fff;border:none;border-radius:14px;padding:13px 26px;font-weight:800;font-size:1.05rem;font-family:'Fredoka';cursor:pointer;box-shadow:var(--shadow-sm);margin:6px}
.btn:hover{background:var(--p-dark)}
.btn.ghost{background:#fff;color:var(--p-dark);border:2px solid #e6dcff}
.btn.green{background:var(--green)} .btn.green:hover{background:var(--green2)}

.tip{background:#eef6ff;border-radius:14px;padding:12px 16px;font-weight:600;margin:14px 0;border-left:5px solid var(--blue)}
.footer{text-align:center;color:var(--muted);margin-top:30px;font-size:.85rem;font-weight:600}
@media(max-width:560px){.hero h1{font-size:1.7rem}.q .qtext{font-size:1.06rem}}