/* ============================================================
   Practica Verbos en Inglés — Master Hub Training
   Estilos: CSS moderno con variables, flexbox y grid.
   ============================================================ */

/* ---- Fuentes de marca (Gotham) ---- */
@font-face {
  font-family: "Gotham";
  src: url("Fonts/Gotham-Book.otf") format("opentype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Gotham";
  src: url("Fonts/Gotham-Bold.otf") format("opentype");
  font-weight: 700;
  font-display: swap;
}

/* ---- Variables ---- */
:root {
  /* Paleta: azules, verdes, blancos y grises claros */
  --blue-900: #0b3a67;
  --blue-700: #145ca4;
  --blue-500: #2b7de9;
  --blue-100: #e7f1fd;
  --green-600: #17915f;
  --green-500: #22b573;
  --green-100: #e4f7ee;
  --red-500:  #e0533d;
  --red-100:  #fdeae6;

  --white: #ffffff;
  --gray-50: #f5f8fc;
  --gray-100: #eef2f7;
  --gray-200: #e1e7ef;
  --gray-400: #9aa7b8;
  --gray-600: #5c6b7e;
  --gray-800: #2b3646;

  --bg: var(--gray-50);
  --card-bg: var(--white);
  --text: var(--gray-800);
  --muted: var(--gray-600);

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;

  --shadow-sm: 0 2px 8px rgba(20, 92, 164, 0.06);
  --shadow: 0 8px 28px rgba(20, 92, 164, 0.10);
  --shadow-lg: 0 16px 44px rgba(20, 92, 164, 0.16);

  --font: "Gotham", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  --transition: 0.22s ease;
}

/* ---- Reset ligero ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 100% -10%, var(--blue-100) 0%, transparent 60%),
    radial-gradient(1000px 500px at -10% 10%, var(--green-100) 0%, transparent 55%),
    var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
}
button { font-family: inherit; }

/* ---- Encabezado / pie ---- */
.app-header {
  position: relative;
  padding: 18px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.site-link {
  position: absolute;
  left: 16px;
  top: 16px;
  text-decoration: none;
  z-index: 2;
}
@media (max-width: 560px) {
  .site-link { left: 8px; top: 8px; padding: 6px 10px; font-size: 0.82rem; }
}
.brand-logo {
  height: 210px;
  width: auto;
  max-width: 680px;
  object-fit: contain;
}
@media (max-width: 560px) {
  .brand-logo { height: 140px; max-width: 94vw; }
}
.app-main {
  flex: 1;
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 8px 18px 40px;
}
.app-footer {
  text-align: center;
  padding: 20px;
  color: var(--muted);
  font-size: 0.85rem;
}

/* ---- Pantallas ---- */
.screen { display: none; animation: fadeIn 0.35s ease; }
.screen.is-active { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Hero ---- */
.hero { text-align: center; margin: 10px 0 28px; }
.hero-title {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  color: var(--blue-900);
  margin: 0 0 10px;
  letter-spacing: -0.5px;
}
.hero-subtitle {
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.15rem);
  max-width: 560px;
  margin: 0 auto;
}
.hero-subtitle strong { color: var(--blue-700); font-weight: 700; }

/* ---- Bloques de configuración ---- */
.config-block { margin-bottom: 26px; }
.config-title {
  font-size: 1.1rem;
  color: var(--gray-800);
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
}
.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--blue-500);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  flex: none;
}

/* ---- Tarjetas de opción ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.cards-groups {
  grid-template-columns: repeat(3, 1fr);
}
.cards-lang .card-icon { font-size: 3rem; }
.cards-lang .card { align-items: center; text-align: center; }
.cards-lang .card-desc { text-align: center; }
.card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 22px 20px;
  background: var(--card-bg);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  text-align: left;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--blue-100); }
.card-icon { font-size: 1.9rem; }
.card-title { font-weight: 700; font-size: 1.1rem; color: var(--gray-800); }
.card-desc { font-size: 0.9rem; color: var(--muted); }
.card[aria-checked="true"] {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 4px var(--blue-100), var(--shadow);
  background: linear-gradient(180deg, #fff, var(--blue-100));
}

/* ---- Chips de nivel ---- */
.levels { display: flex; gap: 12px; flex-wrap: wrap; }
.level-chip {
  flex: 1 1 90px;
  padding: 14px 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--blue-700);
  background: var(--card-bg);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.level-chip:hover { border-color: var(--blue-100); transform: translateY(-2px); }
.level-chip[aria-checked="true"] {
  background: var(--blue-500);
  color: #fff;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 4px var(--blue-100), var(--shadow);
}

/* ---- Inicio ---- */
.config-start { text-align: center; margin-top: 8px; }
.start-hint { color: var(--muted); font-size: 0.95rem; margin: 0 0 14px; }

/* ---- Botones ---- */
.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 22px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), opacity var(--transition);
}
.btn:active { transform: translateY(1px); }
.btn-lg { padding: 15px 34px; font-size: 1.1rem; }
.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  color: #fff;
  box-shadow: var(--shadow);
}
.btn-primary:hover:not(:disabled) { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; box-shadow: none; }
.btn-secondary {
  background: linear-gradient(135deg, var(--green-500), var(--green-600));
  color: #fff;
  box-shadow: var(--shadow);
}
.btn-secondary:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.btn-ghost {
  background: transparent;
  color: var(--blue-700);
  padding: 8px 14px;
  font-size: 0.92rem;
}
.btn-ghost:hover { background: var(--blue-100); }

/* ---- Barra superior de práctica ---- */
.practice-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 4px 0 18px;
}
.tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--blue-100);
  color: var(--blue-700);
  font-size: 0.82rem;
  font-weight: 700;
}

/* ---- Progreso ---- */
.progress-wrap { margin-bottom: 20px; }
.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 8px;
  font-weight: 700;
}
.score-live { color: var(--blue-700); }
.progress-bar {
  height: 12px;
  background: var(--gray-200);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--green-500), var(--blue-500));
  border-radius: 999px;
  transition: width 0.4s ease;
}

/* ---- Tarjeta de ejercicio ---- */
.exercise-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 28px 26px;
}
.exercise-verb {
  font-size: 1.15rem;
  margin: 0 0 22px;
  color: var(--gray-800);
  text-align: center;
}
.exercise-verb-label { color: var(--muted); font-weight: 400; margin-right: 6px; }
#exercise-spanish { color: var(--blue-700); font-weight: 700; text-transform: capitalize; }

.forms-grid { display: grid; gap: 14px; }
.forms-grid[hidden] { display: none; }
.form-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-100);
}
.form-label {
  font-weight: 700;
  color: var(--gray-600);
  font-size: 0.95rem;
}
.form-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gray-800);
  letter-spacing: 0.2px;
}
.form-row.is-blank { background: var(--blue-100); border-color: var(--blue-500); }

/* Cabecera del verbo (francés) */
.fr-head {
  text-align: center;
  margin-bottom: 6px;
}
.fr-infinitive {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--blue-900);
  text-transform: capitalize;
}
.fr-meaning {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
  text-transform: capitalize;
  margin-top: 2px;
}

/* Chips de tiempo verbal (francés) */
.levels-fr { flex-wrap: wrap; }
.level-chip-wide {
  flex: 1 1 130px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 10px;
  line-height: 1.2;
}
.level-chip-wide strong { font-size: 1rem; }
.level-chip-wide span { font-size: 0.85rem; font-weight: 400; opacity: 0.9; }

.answer-input {
  width: 100%;
  padding: 11px 14px;
  font-size: 1.05rem;
  font-weight: 700;
  font-family: inherit;
  color: var(--gray-800);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.answer-input:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px var(--blue-100);
}
.answer-input.correct { border-color: var(--green-500); box-shadow: 0 0 0 3px var(--green-100); }
.answer-input.wrong { border-color: var(--red-500); box-shadow: 0 0 0 3px var(--red-100); }

/* ---- Retroalimentación ---- */
.feedback {
  margin-top: 20px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  animation: fadeIn 0.25s ease;
}
.feedback.ok  { background: var(--green-100); color: var(--green-600); border: 1px solid var(--green-500); }
.feedback.bad { background: var(--red-100);  color: var(--red-500);  border: 1px solid var(--red-500); }
.feedback strong { font-weight: 700; }
.feedback .correct-answer { text-transform: capitalize; }

.exercise-actions {
  margin-top: 22px;
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* ---- Resultados ---- */
.results-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 40px 30px;
  text-align: center;
}
.results-emoji { font-size: 3.4rem; line-height: 1; margin-bottom: 8px; }
.results-title { font-size: 1.7rem; color: var(--blue-900); margin: 0 0 8px; }
.results-message { color: var(--muted); margin: 0 auto 26px; max-width: 440px; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 30px;
}
.stat {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 18px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-number { font-size: 1.7rem; font-weight: 700; color: var(--gray-800); }
.stat-ok { color: var(--green-600); }
.stat-bad { color: var(--red-500); }
.stat-accent { color: var(--blue-700); }
.stat-label { font-size: 0.8rem; color: var(--muted); font-weight: 700; }

.results-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

/* ---- Responsivo ---- */
@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
  .cards-groups { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 8px; }
  .form-label { font-size: 0.85rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .exercise-actions { flex-direction: column-reverse; }
  .exercise-actions .btn { width: 100%; }
  .practice-topbar .btn-ghost { padding: 8px 10px; font-size: 0.85rem; }
}