/* ------------------------------------------------------------------
   curso-ingles/assets/curso.css
   Estilos del MOOC de ingles. Mobile first.
   Paleta alineada con el resto del sitio: navy #1f3a5f + dorado #c9a14a.
   ------------------------------------------------------------------ */

:root {
  --navy: #1f3a5f;
  --navy-dark: #16283f;
  --gold: #c9a14a;
  --ink: #1a2330;
  --muted: #5b6b7f;
  --line: #dfe5ec;
  --bg: #f4f6f9;
  --ok: #1c7a4a;
  --ok-bg: #e6f5ec;
  --bad: #b3261e;
  --bad-bg: #fdeceb;
}

* { box-sizing: border-box; }

body.curso {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
.wrap-wide { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* ---------------- Cabecera de unidad ---------------- */

.u-hero {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-dark) 100%);
  color: #fff;
  padding: 88px 0 28px;
}
.u-hero .kicker {
  display: inline-block;
  background: rgba(201, 161, 74, 0.18);
  border: 1px solid rgba(201, 161, 74, 0.5);
  color: #f0dcae;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 11px;
  border-radius: 999px;
}
.u-hero h1 {
  font-size: clamp(1.5rem, 4.6vw, 2.1rem);
  line-height: 1.22;
  margin: 12px 0 6px;
  font-weight: 800;
}
.u-hero .sub { color: #b9c8db; font-size: 0.95rem; margin: 0; }
.u-hero .facts {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px;
}
.u-hero .facts span {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12.5px;
  color: #dbe5f0;
}

/* ---------------- Navegacion por secciones ---------------- */

.u-tabs {
  position: sticky; top: 0; z-index: 40;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(15, 30, 50, 0.06);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.u-tabs ul {
  display: flex; gap: 4px; list-style: none;
  margin: 0 auto; padding: 0 12px; max-width: 880px;
}
.u-tabs a {
  display: block; white-space: nowrap;
  padding: 13px 12px;
  font-size: 14px; font-weight: 600;
  color: var(--muted); text-decoration: none;
  border-bottom: 3px solid transparent;
}
.u-tabs a:hover { color: var(--navy); }
.u-tabs a.on { color: var(--navy); border-bottom-color: var(--gold); }

/* ---------------- Bloques ---------------- */

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
  margin: 22px 0;
  box-shadow: 0 1px 3px rgba(15, 30, 50, 0.05);
}
.card > h2 {
  margin: 0 0 4px;
  font-size: 1.3rem;
  color: var(--navy);
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.card > h2 .num {
  background: var(--navy); color: #fff;
  width: 28px; height: 28px; flex: 0 0 28px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
}
.card > .lead { color: var(--muted); margin: 0 0 18px; font-size: 0.95rem; }

.goal {
  background: #fffaf0;
  border-left: 4px solid var(--gold);
  border-radius: 0 8px 8px 0;
  padding: 14px 16px;
  margin: 0 0 18px;
}
.goal strong { color: var(--navy); display: block; margin-bottom: 6px; }
.goal ul { margin: 0; padding-left: 20px; }
.goal li { margin: 3px 0; }

/* ---------------- Vocabulario ---------------- */

.vocab { display: grid; gap: 10px; }
@media (min-width: 620px) { .vocab { grid-template-columns: 1fr 1fr; } }

.v-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  background: #fcfdfe;
}
.v-top { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.v-en { font-weight: 700; color: var(--navy); font-size: 1.02rem; }
.v-pron { color: var(--gold); font-size: 0.86rem; font-weight: 600; }
.v-es { color: var(--muted); font-size: 0.92rem; margin-top: 2px; }
.v-ex { font-size: 0.87rem; margin-top: 7px; color: #33445a; font-style: italic; }
.v-ex span { display: block; font-style: normal; color: var(--muted); }

.say {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--navy);
  border-radius: 6px;
  width: 28px; height: 26px;
  font-size: 13px;
  cursor: pointer;
  line-height: 1;
  padding: 0;
}
.say:hover { background: var(--navy); color: #fff; border-color: var(--navy); }
.say:disabled { opacity: 0.35; cursor: default; }

/* ---------------- Gramatica ---------------- */

.g-block { margin-bottom: 26px; }
.g-block:last-child { margin-bottom: 0; }
.g-block h3 {
  font-size: 1.06rem; color: var(--navy);
  margin: 0 0 8px; padding-bottom: 6px;
  border-bottom: 2px solid var(--line);
}
.g-block p { margin: 0 0 10px; }

.tbl-scroll { overflow-x: auto; margin: 12px 0; }
table.g-tbl { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 420px; }
table.g-tbl th, table.g-tbl td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
table.g-tbl th { background: #eef2f7; color: var(--navy); font-weight: 700; }
table.g-tbl td:first-child { font-weight: 600; }

.ex-list { list-style: none; padding: 0; margin: 10px 0 0; }
.ex-list li {
  border-left: 3px solid var(--gold);
  padding: 5px 0 5px 12px;
  margin-bottom: 8px;
}
.ex-list .en { font-weight: 600; color: var(--navy); }
.ex-list .es { display: block; color: var(--muted); font-size: 0.9rem; }

/* ---------------- Errores tipicos ---------------- */

.err { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin-bottom: 12px; }
.err-row { display: grid; grid-template-columns: 1fr; }
@media (min-width: 620px) { .err-row { grid-template-columns: 1fr 1fr; } }
.err-bad, .err-good { padding: 11px 14px; font-size: 0.95rem; }
.err-bad { background: var(--bad-bg); color: #7d1a15; }
.err-good { background: var(--ok-bg); color: #125c39; }
.err-bad b, .err-good b { display: block; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; opacity: 0.75; margin-bottom: 2px; }
.err-why { padding: 10px 14px; background: #fff; font-size: 0.9rem; color: var(--muted); border-top: 1px solid var(--line); }

/* ---------------- Motor de practica ---------------- */

.drill { border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.drill-bar { padding: 12px 16px; border-bottom: 1px solid var(--line); background: #f8fafc; border-radius: 12px 12px 0 0; }
.drill-bar .row { display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--muted); margin-bottom: 7px; }
.drill-bar .row b { color: var(--navy); }
.pbar { height: 7px; background: #e3e9f0; border-radius: 999px; overflow: hidden; }
.pbar i { display: block; height: 100%; width: 0; background: var(--gold); transition: width 0.25s ease; }

.drill-body { padding: 20px 16px; min-height: 210px; }
.d-kind { font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--gold); font-weight: 700; }
.d-q { font-size: 1.12rem; font-weight: 600; color: var(--ink); margin: 8px 0 4px; line-height: 1.45; }
.d-es { color: var(--muted); font-size: 0.9rem; margin-bottom: 14px; }

.opts { display: grid; gap: 8px; margin-top: 6px; }
.opt {
  text-align: left; width: 100%;
  border: 1.5px solid var(--line); background: #fff;
  border-radius: 9px; padding: 12px 14px;
  font-size: 1rem; font-family: inherit; color: var(--ink);
  cursor: pointer;
}
.opt:hover:not(:disabled) { border-color: var(--navy); background: #f7fafd; }
.opt:disabled { cursor: default; }
.opt.pick { border-color: var(--navy); background: #eef4fb; }
.opt.right { border-color: var(--ok); background: var(--ok-bg); color: #125c39; font-weight: 600; }
.opt.wrong { border-color: var(--bad); background: var(--bad-bg); color: #7d1a15; }

.d-input {
  width: 100%; font-family: inherit; font-size: 1.05rem;
  padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 9px;
  color: var(--ink); background: #fff;
}
.d-input:focus { outline: none; border-color: var(--navy); box-shadow: 0 0 0 3px rgba(31,58,95,0.09); }

.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  border: 1.5px solid var(--line); background: #fff; border-radius: 8px;
  padding: 8px 12px; font-size: 0.98rem; font-family: inherit; color: var(--ink); cursor: pointer;
}
.chip:hover:not(:disabled) { border-color: var(--navy); }
.chip.used { opacity: 0.3; cursor: default; }
.build {
  min-height: 48px; border: 1.5px dashed var(--line); border-radius: 9px;
  padding: 9px; margin-bottom: 12px; background: #fbfcfe;
  display: flex; flex-wrap: wrap; gap: 7px; align-items: flex-start;
}
.build:empty::before { content: 'Toca las palabras en orden'; color: #a9b6c6; font-size: 0.9rem; }

.pairs { display: grid; gap: 8px; }
@media (min-width: 560px) { .pairs { grid-template-columns: 1fr 1fr; } }
.pair-col { display: grid; gap: 7px; }
.pair-btn {
  border: 1.5px solid var(--line); background: #fff; border-radius: 8px;
  padding: 10px 12px; font-size: 0.97rem; font-family: inherit; text-align: left;
  color: var(--ink); cursor: pointer;
}
.pair-btn.pick { border-color: var(--navy); background: #eef4fb; }
.pair-btn.done { border-color: var(--ok); background: var(--ok-bg); color: #125c39; cursor: default; }
.pair-btn.miss { border-color: var(--bad); background: var(--bad-bg); }

.big-say {
  display: inline-flex; align-items: center; gap: 9px;
  background: var(--navy); color: #fff; border: none; border-radius: 9px;
  padding: 13px 20px; font-size: 1rem; font-family: inherit; font-weight: 600; cursor: pointer;
}
.big-say:hover { background: var(--navy-dark); }

.fb { margin-top: 14px; border-radius: 9px; padding: 12px 14px; font-size: 0.95rem; display: none; }
.fb.on { display: block; }
.fb.ok  { background: var(--ok-bg);  border-left: 4px solid var(--ok);  color: #125c39; }
.fb.bad { background: var(--bad-bg); border-left: 4px solid var(--bad); color: #7d1a15; }
.fb b { display: block; margin-bottom: 3px; }

.drill-foot {
  padding: 14px 16px; border-top: 1px solid var(--line);
  display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap;
  background: #f8fafc; border-radius: 0 0 12px 12px;
}

.btn {
  border: none; border-radius: 9px; padding: 11px 22px;
  font-size: 0.97rem; font-weight: 600; font-family: inherit; cursor: pointer;
  text-decoration: none; display: inline-flex; align-items: center; gap: 7px;
}
.btn-p { background: var(--gold); color: #1a1a1a; }
.btn-p:hover { filter: brightness(0.94); }
.btn-s { background: #fff; color: var(--navy); border: 1.5px solid var(--line); }
.btn-s:hover { border-color: var(--navy); }
.btn:disabled { opacity: 0.45; cursor: default; filter: none; }

.result { text-align: center; padding: 26px 10px; }
.result .score { font-size: 3rem; font-weight: 800; color: var(--navy); line-height: 1; }
.result .score small { font-size: 1.2rem; color: var(--muted); font-weight: 600; }
.result h3 { margin: 12px 0 6px; color: var(--navy); }
.result p { color: var(--muted); margin: 0 auto 18px; max-width: 420px; }
.result .acts { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* ---------------- Speaking ---------------- */

.speak-target {
  background: #f7fafd; border: 1px solid var(--line); border-radius: 9px;
  padding: 16px; font-size: 1.08rem; color: var(--navy); font-weight: 600; margin-bottom: 12px;
}
.speak-out { margin-top: 12px; font-size: 0.95rem; color: var(--muted); min-height: 22px; }

/* ---------------- Navegacion inferior ---------------- */

.u-nav { display: flex; justify-content: space-between; gap: 12px; margin: 26px 0 50px; flex-wrap: wrap; }
.u-nav a { flex: 1 1 200px; }

/* ---------------- Portada ---------------- */

.lvl { margin-bottom: 30px; }
.lvl-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 4px; }
.lvl-head h2 { margin: 0; color: var(--navy); font-size: 1.4rem; }
.tag { font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; padding: 3px 9px; border-radius: 999px; }
.tag-free { background: var(--ok-bg); color: #125c39; }
.tag-prem { background: #fff3d6; color: #8a6516; }
.lvl > p { color: var(--muted); margin: 0 0 14px; }

.units { display: grid; gap: 10px; }
@media (min-width: 700px) { .units { grid-template-columns: 1fr 1fr; } }
.unit {
  display: flex; gap: 12px; align-items: flex-start;
  border: 1px solid var(--line); border-radius: 10px; background: #fff;
  padding: 13px 15px; text-decoration: none; color: inherit;
}
a.unit:hover { border-color: var(--navy); box-shadow: 0 3px 12px rgba(15,30,50,0.08); }
.unit .n {
  flex: 0 0 30px; height: 30px; border-radius: 50%;
  background: #eef2f7; color: var(--navy);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
a.unit .n { background: var(--navy); color: #fff; }
.unit .t { font-weight: 650; color: var(--navy); font-size: 0.97rem; line-height: 1.35; }
.unit .f { color: var(--muted); font-size: 0.85rem; margin-top: 2px; }
.unit.soon { opacity: 0.62; }
.unit.soon .t { color: var(--muted); }

/* ---------------- Evaluaciones (lab y examen) ---------------- */

.ev-grid { display: grid; gap: 12px; }
@media (min-width: 620px) { .ev-grid { grid-template-columns: 1fr 1fr; } }
.ev-grid label { display: block; font-size: 0.88rem; font-weight: 600; color: var(--navy); }
.ev-grid .req { color: var(--bad); }
.ev-grid .opt { color: var(--muted); font-weight: 400; }
.ev-grid input {
  display: block; width: 100%; margin-top: 5px;
  font-family: inherit; font-size: 1rem; color: var(--ink);
  padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 8px; background: #fff;
}
.ev-grid input:focus { outline: none; border-color: var(--navy); box-shadow: 0 0 0 3px rgba(31,58,95,0.09); }

.ev-item { border-top: 1px solid var(--line); padding: 18px 0; }
.ev-item:first-of-type { border-top: none; padding-top: 4px; }
.ev-head { display: flex; gap: 11px; align-items: flex-start; margin-bottom: 11px; }
.ev-n {
  flex: 0 0 26px; height: 26px; border-radius: 50%;
  background: var(--navy); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.ev-head > div { flex: 1 1 auto; }
.ev-prompt { font-weight: 600; color: var(--ink); line-height: 1.45; }
.ev-es { color: var(--muted); font-size: 0.89rem; margin-top: 2px; }
.ev-pts {
  flex: 0 0 auto; font-size: 11px; font-weight: 700; color: var(--gold);
  border: 1px solid rgba(201,161,74,0.5); border-radius: 999px; padding: 2px 9px; white-space: nowrap;
}

.ev-opts { display: grid; gap: 7px; }
.ev-op {
  display: flex; gap: 10px; align-items: flex-start;
  border: 1.5px solid var(--line); border-radius: 9px; padding: 10px 13px;
  cursor: pointer; background: #fff;
}
.ev-op:hover { border-color: var(--navy); background: #f7fafd; }
.ev-op input { margin-top: 3px; flex: 0 0 auto; }

textarea.d-input { resize: vertical; line-height: 1.55; font-size: 1rem; }

.ev-req {
  margin-top: 10px; background: #fffaf0; border-left: 3px solid var(--gold);
  border-radius: 0 8px 8px 0; padding: 10px 14px; font-size: 0.88rem; color: #5a4a26;
}
.ev-req ul { margin: 5px 0 0; padding-left: 19px; }
.ev-req li { margin: 2px 0; }

.lab-cta {
  background: linear-gradient(135deg, #1f3a5f 0%, #16283f 100%);
  color: #fff; border-radius: 12px; padding: 22px; margin: 22px 0;
}
.lab-cta h2 { color: #fff; margin: 0 0 6px; font-size: 1.22rem; }
.lab-cta p { color: #c2d1e2; margin: 0 0 16px; font-size: 0.95rem; }
.lab-cta .tag-nota {
  display: inline-block; background: rgba(201,161,74,0.18);
  border: 1px solid rgba(201,161,74,0.5); color: #f0dcae;
  font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 3px 10px; border-radius: 999px; margin-bottom: 10px;
}

@media print {
  .u-tabs, .drill-foot, .say, .btn, .u-nav { display: none !important; }
  body.curso { background: #fff; }
  .card { break-inside: avoid; box-shadow: none; }
}