:root {
  --primary: #EC7A08;
  --primary-dark: #C4620A;
  --primary-glow: rgba(236,122,8,0.25);
  --black: #000000;
  --dark: #0d0d0d;
  --dark-2: #161616;
  --dark-3: #1e1e1e;
  --dark-4: #252525;
  --gray: #888888;
  --white: #FFFFFF;
  --white-dim: rgba(255,255,255,0.65);
  --white-faint: rgba(255,255,255,0.05);
  --shadow-orange: 0 8px 32px rgba(236,122,8,0.28);
  --font-title: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --sidebar-w: 260px;
  --sidebar-collapsed-w: 62px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--dark);
  color: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--font-title); font-weight: 700; font-size: 0.9rem;
  border-radius: var(--radius-full); padding: 0.6rem 1.5rem;
  border: 2px solid transparent; transition: all 250ms ease; cursor: pointer;
  white-space: nowrap;
}
.btn--primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.btn--primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-orange); }
.btn--ghost { background: transparent; color: rgba(255,255,255,0.6); border-color: rgba(255,255,255,0.15); }
.btn--ghost:hover { color: var(--white); border-color: rgba(255,255,255,0.35); }
.btn--sm { font-size: 0.8rem; padding: 0.45rem 1.1rem; }
.btn--full { width: 100%; }

.portal-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: #0a0a0a;
  border-right: 1px solid rgba(255,255,255,0.06);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  overflow-y: auto;
  /* Scrollbar fina y discreta — oculta por defecto, visible al hacer hover */
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.06) transparent;
}
.sidebar:hover {
  scrollbar-color: rgba(255,255,255,0.12) transparent;
}
.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
}
.sidebar:hover::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.16); }
.sidebar__brand {
  padding: 1rem 1rem 0.75rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: transparent; /* mismo fondo que el sidebar — elimina el rectángulo */
}
/* Fila superior: logo + botón colapso */
.sidebar__brand-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.sidebar__logo { display: flex; align-items: center; gap: 0.5rem; }
.sidebar__logo-text { font-family: var(--font-title); font-weight: 900; font-size: 1.1rem; letter-spacing: 0.1em; }
.sidebar__logo-text span { color: var(--primary); }
.sidebar__logo-arrow { color: var(--primary); font-size: 0.9rem; }
.sidebar__tagline { font-size: 0.7rem; color: rgba(255,255,255,0.3); font-family: var(--font-title); letter-spacing: 0.05em; }

.sidebar__user {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; gap: 0.75rem;
}
.sidebar__avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-title); font-weight: 800; font-size: 0.75rem;
  color: white; flex-shrink: 0;
}
.sidebar__user-name { font-family: var(--font-title); font-weight: 700; font-size: 0.82rem; color: var(--white); }
.sidebar__user-role { font-size: 0.68rem; color: rgba(255,255,255,0.35); }

.sidebar__nav { padding: 1rem 0.75rem; flex: 1; }
.sidebar__nav-label {
  font-family: var(--font-title); font-size: 0.6rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase; color: rgba(255,255,255,0.25);
  padding: 0 0.5rem; margin-bottom: 0.4rem; margin-top: 1rem;
}
.sidebar__nav-label:first-child { margin-top: 0; }

.nav-item {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.6rem 0.75rem; border-radius: var(--radius-sm);
  font-family: var(--font-title); font-size: 0.82rem; font-weight: 600;
  color: rgba(255,255,255,0.5); transition: all 150ms; cursor: pointer;
}
.nav-item:hover { background: var(--white-faint); color: var(--white); }
.nav-item--active { background: rgba(236,122,8,0.12); color: var(--primary); border: 1px solid rgba(236,122,8,0.2); }
.nav-item__icon { font-size: 1rem; width: 20px; text-align: center; flex-shrink: 0; }
.nav-item__badge {
  margin-left: auto; background: var(--primary); color: white;
  font-size: 0.6rem; font-weight: 700; padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
}

.sidebar__footer { padding: 1rem 1.25rem; border-top: 1px solid rgba(255,255,255,0.06); display: flex; flex-direction: column; gap: 0.25rem; }


/* Clase genérica por si se usa en otro lugar */
.sidebar__logout {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-title);
  font-size: 0.78rem;
  font-weight: 600;
  color: rgba(255,255,255,0.3);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all 150ms;
  cursor: pointer;
  width: 100%;
}

.sidebar__logout:hover {
  color: rgba(255,255,255,0.7);
  background: var(--white-faint);
}

.sidebar__logout.sidebar__logout--mobile {
  display: none;
}

/* Clase genérica por si se usa en otro lugar — mantener comportamiento */
.sidebar__logout {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-title); font-size: 0.78rem; font-weight: 600;
  color: rgba(255,255,255,0.3); padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm); transition: all 150ms;
  cursor: pointer; width: 100%;
}
.sidebar__logout:hover { color: rgba(255,255,255,0.7); background: var(--white-faint); }

.portal-main { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; }

.portal-topbar {
  background: rgba(13,13,13,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 0 2rem;
  height: 60px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 50;
}
.topbar__title { font-family: var(--font-title); font-weight: 800; font-size: 0.95rem; color: var(--white); }
.topbar__breadcrumb { font-size: 0.75rem; color: rgba(255,255,255,0.35); margin-top: 0.1rem; }
.topbar__right { display: flex; align-items: center; gap: 1rem; }
.topbar__streak {
  display: flex; align-items: center; gap: 0.4rem;
  background: rgba(236,122,8,0.1); border: 1px solid rgba(236,122,8,0.2);
  border-radius: var(--radius-full); padding: 0.3rem 0.8rem;
  font-family: var(--font-title); font-size: 0.72rem; font-weight: 700; color: var(--primary);
}

.portal-content { padding: 2rem; flex: 1; }

#view-inicio { display: block; }
#view-clases, #view-clase-detalle, #view-quiz { display: none; }

.welcome-block { margin-bottom: 2rem; }
.welcome-block__tag {
  font-family: var(--font-title); font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--primary);
  display: block; margin-bottom: 0.4rem;
}
.welcome-block__title { font-family: var(--font-title); font-weight: 900; font-size: 1.6rem; color: var(--white); margin-bottom: 0.25rem; }
.welcome-block__sub { color: rgba(255,255,255,0.45); font-size: 0.9rem; }

.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 2rem; }
.stat-card { background: var(--dark-2); border: 1px solid rgba(255,255,255,0.07); border-radius: var(--radius-md); padding: 1.25rem; }
.stat-card__label {
  font-family: var(--font-title); font-size: 0.65rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em; color: rgba(255,255,255,0.35);
  margin-bottom: 0.5rem;
}
.stat-card__value { font-family: var(--font-title); font-weight: 900; font-size: 1.8rem; color: var(--primary); line-height: 1; }
.stat-card__sub { font-size: 0.72rem; color: rgba(255,255,255,0.3); margin-top: 0.25rem; }

.section-label {
  font-family: var(--font-title); font-weight: 800; font-size: 0.85rem;
  color: var(--white); margin-bottom: 1rem;
  display: flex; align-items: center; justify-content: space-between;
}
.section-label a { font-size: 0.75rem; color: var(--primary); font-weight: 600; }

.current-class {
  background: linear-gradient(135deg, rgba(236,122,8,0.12) 0%, rgba(196,98,10,0.06) 100%);
  border: 1px solid rgba(236,122,8,0.3);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2rem;
  display: flex; align-items: center; gap: 1.5rem;
}
.current-class__num {
  font-family: var(--font-title); font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.15em; color: var(--primary); text-transform: uppercase; margin-bottom: 0.4rem;
}
.current-class__title { font-family: var(--font-title); font-weight: 800; font-size: 1.2rem; color: var(--white); margin-bottom: 0.5rem; }
.current-class__desc { color: rgba(255,255,255,0.5); font-size: 0.88rem; flex: 1; }
.current-class__bar { background: rgba(255,255,255,0.08); border-radius: var(--radius-full); height: 4px; margin: 0.75rem 0 0.25rem; overflow: hidden; }
.current-class__fill { height: 100%; background: linear-gradient(90deg, var(--primary), #ffb347); border-radius: var(--radius-full); }
.current-class__progress-text { font-size: 0.68rem; color: rgba(255,255,255,0.35); }
.current-class__icon { font-size: 2.5rem; flex-shrink: 0; }

.classes-mini-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; margin-bottom: 2rem; }
.mini-class {
  background: var(--dark-2); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-md); padding: 1rem; cursor: pointer;
  transition: all 200ms; position: relative;
}
.mini-class:hover:not(.mini-class--locked) { border-color: rgba(236,122,8,0.35); transform: translateY(-2px); }
.mini-class--done { border-color: rgba(34,197,94,0.2); background: rgba(34,197,94,0.04); }
.mini-class--active { border-color: rgba(236,122,8,0.4); background: rgba(236,122,8,0.06); }
.mini-class--locked { opacity: 0.45; cursor: default; }
.mini-class__num {
  font-family: var(--font-title); font-size: 0.58rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--primary); margin-bottom: 0.3rem;
}
.mini-class--done .mini-class__num { color: #4ade80; }
.mini-class__name { font-family: var(--font-title); font-size: 0.78rem; font-weight: 700; color: var(--white); line-height: 1.3; margin-bottom: 0.4rem; }
.mini-class__status { font-size: 0.65rem; color: rgba(255,255,255,0.3); }
.mini-class--done .mini-class__status { color: #4ade80; }
.mini-class--active .mini-class__status { color: var(--primary); }
.mini-class__lock { position: absolute; top: 0.75rem; right: 0.75rem; font-size: 0.75rem; opacity: 0.5; }

.classes-list { display: flex; flex-direction: column; gap: 0.75rem; }
.class-row {
  background: var(--dark-2); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-md); padding: 1.25rem 1.5rem;
  display: flex; align-items: center; gap: 1.25rem;
  transition: all 200ms; cursor: pointer;
}
.class-row:hover:not(.class-row--locked) { border-color: rgba(236,122,8,0.35); transform: translateX(4px); }
.class-row--locked { opacity: 0.45; cursor: default; }
.class-row--done { border-color: rgba(34,197,94,0.2); }
.class-row--active { border-color: rgba(236,122,8,0.3); background: rgba(236,122,8,0.05); }
.class-row__num-badge {
  width: 40px; height: 40px; border-radius: var(--radius-sm); background: var(--dark-3);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-title); font-weight: 900; font-size: 0.85rem;
  color: rgba(255,255,255,0.4); flex-shrink: 0;
}
.class-row--done .class-row__num-badge { background: rgba(34,197,94,0.1); color: #4ade80; }
.class-row--active .class-row__num-badge { background: rgba(236,122,8,0.15); color: var(--primary); }
.class-row__info { flex: 1; }
.class-row__tag {
  font-family: var(--font-title); font-size: 0.6rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.3);
  margin-bottom: 0.2rem;
}
.class-row--done .class-row__tag { color: #4ade80; }
.class-row--active .class-row__tag { color: var(--primary); }
.class-row__title { font-family: var(--font-title); font-weight: 700; font-size: 0.95rem; color: var(--white); }
.class-row__desc { font-size: 0.82rem; color: rgba(255,255,255,0.4); margin-top: 0.2rem; }
.class-row__right { display: flex; flex-direction: column; align-items: flex-end; gap: 0.4rem; flex-shrink: 0; }
.class-row__score { font-family: var(--font-title); font-size: 0.72rem; font-weight: 700; color: #4ade80; }
.status-pill { font-family: var(--font-title); font-size: 0.65rem; font-weight: 700; padding: 0.25rem 0.7rem; border-radius: var(--radius-full); }
.pill--done { background: rgba(34,197,94,0.1); color: #4ade80; border: 1px solid rgba(34,197,94,0.2); }
.pill--active { background: rgba(236,122,8,0.12); color: var(--primary); border: 1px solid rgba(236,122,8,0.25); }
.pill--locked { background: rgba(255,255,255,0.04); color: rgba(255,255,255,0.25); border: 1px solid rgba(255,255,255,0.08); }

.clase-header {
  background: var(--dark-2); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg); padding: 2rem; margin-bottom: 1.5rem;
}
.clase-header__num {
  font-family: var(--font-title); font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--primary); margin-bottom: 0.4rem;
}
.clase-header__title { font-family: var(--font-title); font-weight: 900; font-size: 1.7rem; color: var(--white); margin-bottom: 0.75rem; }
.clase-header__tags { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.clase-tag {
  display: inline-block; background: rgba(236,122,8,0.1); color: var(--primary);
  border: 1px solid rgba(236,122,8,0.2); border-radius: var(--radius-full);
  font-size: 0.68rem; font-weight: 700; font-family: var(--font-title); padding: 0.2rem 0.7rem;
}
.clase-header__meta { display: flex; gap: 1.5rem; font-size: 0.8rem; color: rgba(255,255,255,0.4); }
.clase-meta-item { display: flex; align-items: center; gap: 0.35rem; }

.clase-content {
  background: var(--dark-2); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg); padding: 2rem; margin-bottom: 1.5rem;
}
.clase-content h3 { font-family: var(--font-title); font-weight: 800; font-size: 1.1rem; color: var(--white); margin-bottom: 1rem; margin-top: 1.5rem; }
.clase-content h3:first-child { margin-top: 0; }
.clase-content p { color: rgba(255,255,255,0.65); font-size: 0.95rem; line-height: 1.8; margin-bottom: 1rem; }
.clase-content ul { padding-left: 1.2rem; margin-bottom: 1rem; }
.clase-content li { color: rgba(255,255,255,0.6); font-size: 0.92rem; line-height: 1.7; margin-bottom: 0.4rem; }
.clase-content li::marker { color: var(--primary); }
.clase-tip {
  background: rgba(236,122,8,0.08); border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem; margin: 1.25rem 0;
}
.clase-tip__label {
  font-family: var(--font-title); font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--primary); margin-bottom: 0.4rem;
}
.clase-tip p { color: rgba(255,255,255,0.7); font-size: 0.9rem; margin: 0; }

.clase-nav { display: flex; justify-content: space-between; align-items: center; }
.clase-nav__btn {
  display: flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-title); font-weight: 700; font-size: 0.85rem;
  padding: 0.7rem 1.4rem; border-radius: var(--radius-full);
  border: 2px solid transparent; transition: all 200ms; cursor: pointer;
}
.clase-nav__btn--primary { background: var(--primary); color: white; border-color: var(--primary); }
.clase-nav__btn--primary:hover { background: var(--primary-dark); }
.clase-nav__btn--ghost { background: transparent; color: rgba(255,255,255,0.5); border-color: rgba(255,255,255,0.15); }
.clase-nav__btn--ghost:hover { color: var(--white); border-color: rgba(255,255,255,0.35); }

.quiz-header { text-align: center; margin-bottom: 2.5rem; }
.quiz-header__tag {
  font-family: var(--font-title); font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--primary);
  display: block; margin-bottom: 0.5rem;
}
.quiz-header__title { font-family: var(--font-title); font-weight: 900; font-size: 1.6rem; color: var(--white); margin-bottom: 0.5rem; }
.quiz-header__sub { color: rgba(255,255,255,0.45); font-size: 0.9rem; }
.quiz-progress { background: rgba(255,255,255,0.07); border-radius: var(--radius-full); height: 6px; margin: 1.5rem 0; overflow: hidden; }
.quiz-progress__fill { height: 100%; background: linear-gradient(90deg, var(--primary), #ffb347); border-radius: var(--radius-full); transition: width 400ms ease; }

.quiz-card {
  background: var(--dark-2); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg); padding: 2rem; max-width: 640px; margin: 0 auto;
}
.quiz-card__num {
  font-family: var(--font-title); font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.3);
  margin-bottom: 0.75rem;
}
.quiz-card__question { font-family: var(--font-title); font-weight: 800; font-size: 1.1rem; color: var(--white); margin-bottom: 1.5rem; line-height: 1.4; }
.quiz-options { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1.5rem; }
.quiz-option {
  background: var(--dark-3); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md); padding: 0.9rem 1.1rem;
  display: flex; align-items: center; gap: 0.75rem;
  cursor: pointer; transition: all 200ms;
  font-size: 0.92rem; color: rgba(255,255,255,0.7);
}
.quiz-option:hover { border-color: rgba(236,122,8,0.35); background: rgba(236,122,8,0.05); color: var(--white); }
.quiz-option--selected { border-color: var(--primary); background: rgba(236,122,8,0.1); color: var(--white); }
.quiz-option--correct { border-color: #4ade80; background: rgba(74,222,128,0.08); color: #4ade80; }
.quiz-option--wrong { border-color: #f87171; background: rgba(248,113,113,0.08); color: #f87171; }
.quiz-option__letter {
  width: 28px; height: 28px; border-radius: 50%;
  background: rgba(255,255,255,0.06); display: flex;
  align-items: center; justify-content: center;
  font-family: var(--font-title); font-weight: 700; font-size: 0.75rem; flex-shrink: 0;
}
.quiz-option--selected .quiz-option__letter { background: var(--primary); color: white; }

.quiz-actions { display: flex; justify-content: flex-end; gap: 0.75rem; }

.quiz-result { text-align: center; padding: 2rem; }
.quiz-result__icon { font-size: 3.5rem; margin-bottom: 1rem; }
.quiz-result__title { font-family: var(--font-title); font-weight: 900; font-size: 1.5rem; color: var(--white); margin-bottom: 0.5rem; }
.quiz-result__score { font-family: var(--font-title); font-weight: 900; font-size: 2.5rem; color: var(--primary); margin: 1rem 0; }
.quiz-result__msg { color: rgba(255,255,255,0.55); font-size: 0.92rem; margin-bottom: 2rem; line-height: 1.6; }
.quiz-result__unlock {
  background: rgba(236,122,8,0.1); border: 1px solid rgba(236,122,8,0.25);
  border-radius: var(--radius-md); padding: 1rem 1.5rem; margin: 1.5rem 0;
  display: flex; align-items: center; gap: 1rem; text-align: left;
}
.quiz-result__unlock-text { font-family: var(--font-title); font-weight: 700; font-size: 0.85rem; color: var(--white); }
.quiz-result__unlock-sub { font-size: 0.78rem; color: var(--primary); margin-top: 0.2rem; }

.terminal-effect {
  font-family: 'Courier New', monospace; font-size: 0.8rem;
  color: rgba(255,255,255,0.3); background: rgba(0,0,0,0.4);
  border-radius: var(--radius-sm); padding: 0.75rem 1rem;
  text-align: left; margin: 1rem 0;
}
.terminal-line { margin-bottom: 0.2rem; }
.terminal-line--orange { color: var(--primary); }
.terminal-line--green { color: #4ade80; }

.achievements { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; margin-top: 1.5rem; }
.achievement { background: var(--dark-2); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius-md); padding: 1rem; text-align: center; }
.achievement--unlocked { border-color: rgba(236,122,8,0.25); }
.achievement--locked { opacity: 0.35; }
.achievement__icon { font-size: 1.5rem; margin-bottom: 0.4rem; }
.achievement__name { font-family: var(--font-title); font-size: 0.7rem; font-weight: 700; color: rgba(255,255,255,0.7); }

@media (max-width: 1100px) {
  .stats-row,
  .classes-mini-grid,
  .achievements {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .sidebar {
    position: static;
    width: 100%;
    height: auto;
  }

  .portal-layout {
    flex-direction: column;
  }

  .portal-main {
    margin-left: 0;
  }

  .portal-topbar,
  .portal-content {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .portal-cta__inner,
  .clase-nav,
  .current-class,
  .class-row {
    flex-direction: column;
    align-items: stretch;
  }

  .class-row__right {
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .stats-row,
  .classes-mini-grid,
  .achievements {
    grid-template-columns: 1fr;
  }

  .quiz-actions {
    flex-direction: column;
  }
}
/* =========================================================================
   PORTAL FUNCIONAL — ESTILOS NUEVOS
   Animación de acceso · Login · Perfil · Logros · Resultados · Contacto
   ========================================================================= */

/* ── LOADER ────────────────────────────────────────────────────────────── */
.portal-loading {
  position:fixed; inset:0; background:var(--dark); z-index:9999;
  display:flex; align-items:center; justify-content:center;
  transition: opacity 280ms ease, visibility 280ms ease;
}
.portal-loading__inner { text-align:center; }
.portal-loading__logo {
  font-family:var(--font-title); font-weight:900; font-size:1.75rem;
  letter-spacing:0.12em; color:var(--white); margin-bottom:0.75rem;
}
.portal-loading__logo span { color:var(--primary); }
.portal-loading__text {
  font-family:var(--font-title); font-size:0.78rem;
  color:rgba(255,255,255,0.4); letter-spacing:0.08em;
  animation: loading-pulse 1.4s ease-in-out infinite;
}
@keyframes loading-pulse { 0%,100%{opacity:.4} 50%{opacity:1} }

/* ── ANIMACIÓN DE ACCESO ─────────────────────────────────────────────── */
.acceso-anim {
  position:fixed; inset:0; z-index:8000;
  background:#000;
  display:flex; align-items:center; justify-content:center;
}
.acceso-anim__terminal {
  width: min(600px, 90vw);
  font-family: 'Share Tech Mono', 'Courier New', monospace;
  font-size: clamp(0.75rem, 1.5vw, 0.95rem);
  line-height: 2;
  padding: 2rem;
  background: rgba(10,10,10,0.98);
  border: 1px solid rgba(236,122,8,0.3);
  border-radius: 12px;
  box-shadow: 0 0 60px rgba(236,122,8,0.12), 0 0 0 1px rgba(236,122,8,0.08);
}
.acceso-line { letter-spacing: 0.04em; }
.acceso-line--big {
  font-size: clamp(0.9rem, 1.8vw, 1.1rem);
  font-weight:700; text-align:center;
  padding: 0.25rem 0;
  text-shadow: 0 0 20px currentColor;
}

/* ── LOGIN ───────────────────────────────────────────────────────────── */
.login-screen {
  position:fixed; inset:0; background:var(--dark); z-index:500;
  display:flex; align-items:center; justify-content:center;
  overflow-y:auto; padding:2rem 1rem;
}
.login-bg { position:absolute; inset:0; pointer-events:none; }
.login-bg__grid {
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(236,122,8,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(236,122,8,.04) 1px,transparent 1px);
  background-size:40px 40px;
}
.login-bg__orb {
  position:absolute; width:600px; height:600px;
  background:radial-gradient(circle,rgba(236,122,8,.12) 0%,transparent 65%);
  border-radius:50%; top:-150px; right:-150px; filter:blur(80px);
}
.login-box {
  position:relative; z-index:1; background: #000000;
  border:1px solid rgba(255,255,255,.08); border-radius:var(--radius-lg);
  padding:2.5rem 2rem; width:100%; max-width:420px;
  box-shadow:0 32px 80px rgba(0,0,0,.6), 0 0 0 1px rgba(236,122,8,.08);
}
.login-logo { display:flex; align-items:center; gap:.5rem; margin-bottom:.4rem; }
/* Botón X para cerrar el login y volver al sitio */
.login-close {
  position:absolute; top:1rem; right:1rem;
  width:32px; height:32px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:.9rem; color:rgba(255,255,255,.35);
  background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.1);
  text-decoration:none; transition:all 150ms;
  line-height:1;
}
.login-close:hover { color:var(--white); background:rgba(255,255,255,.12); border-color:rgba(255,255,255,.25); }
.login-logo__text { font-family:var(--font-title); font-weight:900; font-size:1.1rem; letter-spacing:.12em; }
.login-logo__text span { color:var(--primary); }
.login-logo__arrow { color:var(--primary); font-size:.9rem; }
.login-tagline { font-family:var(--font-title); font-size:.68rem; color:rgba(255,255,255,.3); letter-spacing:.05em; margin-bottom:1.75rem; }
.login-title   { font-family:var(--font-title); font-weight:900; font-size:1.5rem; color:var(--white); margin-bottom:.4rem; }
.login-subtitle{ font-size:.88rem; color:rgba(255,255,255,.45); margin-bottom:1.5rem; }
.login-msg { border-radius:var(--radius-sm); padding:.75rem 1rem; font-size:.85rem; margin-bottom:1rem; line-height:1.5; }
.login-msg--error { background:rgba(220,38,38,.12); border:1px solid rgba(220,38,38,.3); color:#fca5a5; }
.login-msg--ok    { background:rgba(34,197,94,.1);  border:1px solid rgba(34,197,94,.25); color:#86efac; }
.login-form { display:flex; flex-direction:column; gap:1rem; }
.lf-field { display:flex; flex-direction:column; gap:.4rem; }
.lf-label { font-family:var(--font-title); font-size:.75rem; font-weight:700; color:rgba(255,255,255,.55); letter-spacing:.05em; }
.lf-input {
  background:var(--dark-3); border:1px solid rgba(255,255,255,.1); border-radius:var(--radius-sm);
  color:var(--white); font-family:var(--font-body); font-size:.95rem;
  padding:.7rem 1rem; transition:border-color 180ms; outline:none; width:100%;
}
.lf-input::placeholder { color:rgba(255,255,255,.2); }
.lf-input:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(236,122,8,.15); }
.login-footer { text-align:center; margin-top:.5rem; }
.login-link { background:none; border:none; cursor:pointer; font-size:.82rem; color:rgba(255,255,255,.35); font-family:var(--font-body); text-decoration:underline; transition:color 150ms; }
.login-link:hover { color:var(--primary); }
.login-legal { margin-top:1.5rem; font-size:.78rem; color:rgba(255,255,255,.25); text-align:center; }
.login-legal a { color:var(--primary); }

/* ── IFRAME DE CLASE ─────────────────────────────────────────────────── */
.clase-frame-wrapper {
  background:var(--dark-2); border:1px solid rgba(255,255,255,.07);
  border-radius:var(--radius-md); overflow:hidden; margin-bottom:1.5rem; min-height:60vh;
}
.clase-frame { width:100%; height:70vh; border:0; display:block; background:var(--dark-2); }

/* ── PERFIL ──────────────────────────────────────────────────────────── */
.perfil-avatar-section {
  display:flex; align-items:center; gap:1.5rem;
  background:var(--dark-2); border:1px solid rgba(255,255,255,.07);
  border-radius:var(--radius-md); padding:1.5rem; margin-bottom:1.75rem;
}
.perfil-avatar-wrap { position:relative; flex-shrink:0; }
.perfil-avatar {
  width:72px; height:72px; border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  display:flex; align-items:center; justify-content:center;
  font-family:var(--font-title); font-weight:800; font-size:1.3rem; color:#fff;
  overflow:hidden;
}
.perfil-avatar-btn {
  position:absolute; bottom:0; right:0;
  width:26px; height:26px; border-radius:50%;
  background:var(--dark-3); border:2px solid var(--dark-2);
  display:flex; align-items:center; justify-content:center;
  font-size:.85rem; cursor:pointer; transition:background 150ms;
}
.perfil-avatar-btn:hover { background:var(--primary); }
.perfil-avatar-name  { font-family:var(--font-title); font-weight:800; font-size:1rem; color:var(--white); margin-bottom:.2rem; }
.perfil-avatar-email { font-size:.82rem; color:rgba(255,255,255,.4); margin-bottom:.5rem; }
.perfil-foto-status { font-size:.78rem; }
.perfil-foto-status--ok    { color:#4ade80; }
.perfil-foto-status--error { color:#f87171; }

.perfil-tabs { display:flex; gap:.5rem; margin-bottom:1.25rem; }
.perfil-tab {
  font-family:var(--font-title); font-size:.78rem; font-weight:700;
  padding:.5rem 1.2rem; border-radius:var(--radius-full);
  border:1px solid rgba(255,255,255,.1); color:rgba(255,255,255,.45);
  background:transparent; cursor:pointer; transition:all 150ms;
}
.perfil-tab:hover { color:var(--white); }
.perfil-tab--active { background:rgba(236,122,8,.12); border-color:rgba(236,122,8,.3); color:var(--primary); }

.perfil-form { display:flex; flex-direction:column; gap:1rem; max-width:620px; }
.pf-row { display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
.pf-field { display:flex; flex-direction:column; gap:.4rem; }
.pf-label { font-family:var(--font-title); font-size:.72rem; font-weight:700; color:rgba(255,255,255,.5); letter-spacing:.05em; }
.pf-label-hint { color:rgba(255,255,255,.25); font-weight:400; }
.pf-input {
  background:var(--dark-3); border:1px solid rgba(255,255,255,.1); border-radius:var(--radius-sm);
  color:var(--white); font-family:var(--font-body); font-size:.93rem;
  padding:.65rem .9rem; outline:none; transition:border-color 180ms; width:100%;
}
.pf-input:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(236,122,8,.12); }
.pf-input::placeholder { color:rgba(255,255,255,.2); }
.pf-select { appearance:none; cursor:pointer; }
.pf-textarea { resize:vertical; min-height:80px; }
.pf-status { font-size:.82rem; min-height:1.2rem; }
.pf-status--ok    { color:#4ade80; }
.pf-status--error { color:#f87171; }
.perfil-tab-panel { animation:fadeIn 200ms ease; }
@keyframes fadeIn { from{opacity:0;transform:translateY(4px)} to{opacity:1;transform:none} }

/* ── LOGROS ──────────────────────────────────────────────────────────── */
.logros-grid { display:flex; flex-direction:column; gap:.75rem; }
.logro-card {
  display:flex; align-items:center; gap:1.25rem;
  background:var(--dark-2); border:1px solid rgba(255,255,255,.07);
  border-radius:var(--radius-md); padding:1.25rem 1.5rem;
  transition:transform 150ms, border-color 150ms;
}
.logro-card--unlocked { border-color:rgba(236,122,8,.25); }
.logro-card--unlocked:hover { transform:translateX(4px); border-color:rgba(236,122,8,.4); }
.logro-card--locked { opacity:.4; }
.logro-card__icon { font-size:2rem; flex-shrink:0; width:48px; text-align:center; }
.logro-card__nombre { font-family:var(--font-title); font-weight:800; font-size:.95rem; color:var(--white); margin-bottom:.2rem; }
.logro-card__desc   { font-size:.82rem; color:rgba(255,255,255,.45); margin-bottom:.35rem; }
.logro-card__estado { font-family:var(--font-title); font-size:.7rem; font-weight:700; letter-spacing:.05em; }
.logro-card--unlocked .logro-card__estado { color:#4ade80; }
.logro-card--locked   .logro-card__estado { color:rgba(255,255,255,.3); }

/* ── RESULTADOS ──────────────────────────────────────────────────────── */
.resultados-lista { display:flex; flex-direction:column; gap:.75rem; }
.res-row {
  display:flex; align-items:center; gap:1rem;
  background:var(--dark-2); border:1px solid rgba(255,255,255,.07);
  border-radius:var(--radius-md); padding:1rem 1.25rem;
}
.res-row__num {
  font-family:var(--font-title); font-weight:900; font-size:1rem;
  color:var(--primary); flex-shrink:0; width:32px; text-align:center;
}
.res-row__info { flex:1; min-width:0; }
.res-row__titulo { font-family:var(--font-title); font-weight:700; font-size:.88rem; color:var(--white); margin-bottom:.5rem; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.res-barra-track { height:5px; background:rgba(255,255,255,.08); border-radius:99px; overflow:hidden; margin-bottom:.2rem; }
.res-barra-fill  { height:100%; border-radius:99px; transition:width 600ms ease; }
.res-barra-label { font-size:.68rem; color:rgba(255,255,255,.35); }
.res-row__right  { display:flex; flex-direction:column; align-items:flex-end; gap:.35rem; flex-shrink:0; }
.res-puntaje { font-family:var(--font-title); font-weight:900; font-size:1rem; }
.res-puntaje--ok   { color:#4ade80; }
.res-puntaje--fail { color:#f87171; }
.res-sin-datos     { font-size:.82rem; color:rgba(255,255,255,.3); }
.res-row__fecha    { font-size:.7rem; color:rgba(255,255,255,.3); }

/* ── CONTACTO ALUMNOS ────────────────────────────────────────────────── */
.contacto-form-wrap { max-width:640px; }
.contacto-form      { display:flex; flex-direction:column; gap:1rem; }
.cf-row   { display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
.cf-field { display:flex; flex-direction:column; gap:.4rem; }
.cf-label { font-family:var(--font-title); font-size:.72rem; font-weight:700; color:rgba(255,255,255,.5); letter-spacing:.05em; }
.cf-input {
  background:var(--dark-3); border:1px solid rgba(255,255,255,.1); border-radius:var(--radius-sm);
  color:var(--white); font-family:var(--font-body); font-size:.93rem;
  padding:.65rem .9rem; outline:none; transition:border-color 180ms; width:100%;
}
.cf-input:focus         { border-color:var(--primary); box-shadow:0 0 0 3px rgba(236,122,8,.12); }
.cf-input::placeholder  { color:rgba(255,255,255,.2); }
.cf-input[readonly]     { opacity:.5; cursor:default; }
.cf-select   { appearance:none; cursor:pointer; }
.cf-textarea { resize:vertical; min-height:120px; }
.cf-status   { font-size:.84rem; min-height:1.2rem; }
.cf-status--ok    { color:#4ade80; }
.cf-status--error { color:#f87171; }

/* ── STATUS PILLS ────────────────────────────────────────────────────── */
.pill--locked { background:rgba(255,255,255,.06); color:rgba(255,255,255,.35); border:1px solid rgba(255,255,255,.1); }

/* ── RESPONSIVE ──────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .pf-row  { grid-template-columns:1fr; }
  .cf-row  { grid-template-columns:1fr; }
  .res-row { flex-wrap:wrap; }
  .res-row__right { flex-direction:row; align-items:center; gap:.5rem; }
  .acceso-anim__terminal { font-size:.72rem; padding:1.25rem; }
}

/* ── Acciones de contraseña ─────────────────────────────────────────── */
.pf-pass-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.pf-pass-hint {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
  line-height: 1.6;
  margin-top: -0.25rem;
}
.pf-status--neutral {
  color: rgba(255,255,255,0.45);
}

/* ── Animación terminal del formulario de contacto ─────────────────── */
.cf-status--terminal {
  background: rgba(5,5,5,0.9);
  border: 1px solid rgba(236,122,8,0.25);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-top: 0.5rem;
  min-height: 160px;
}
.cf-terminal-line {
  font-family: 'Share Tech Mono', 'Courier New', monospace;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  line-height: 2;
  opacity: 0;
  animation: linea-aparece 150ms ease forwards;
}
.cf-terminal-line--big {
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  padding: 0.25rem 0;
  text-shadow: 0 0 16px currentColor;
}
@keyframes linea-aparece {
  from { opacity: 0; transform: translateX(-6px); }
  to   { opacity: 1; transform: none; }
}

/* Confeti — mismo keyframe que usa main.js */
@keyframes confeti-caer {
  0%   { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(120px) rotate(360deg); opacity: 0; }
}

/* ── Animación terminal de carga de foto ────────────────────────────── */
.perfil-foto-status--terminal {
  background: rgba(5,5,5,0.92);
  border: 1px solid rgba(236,122,8,0.2);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-top: 0.5rem;
  min-height: 80px;
}
.foto-terminal-line {
  font-family: 'Share Tech Mono', 'Courier New', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  line-height: 1.9;
  animation: linea-aparece 120ms ease forwards;
}
.foto-terminal-line--big {
  font-size: 0.88rem;
  font-weight: 700;
  text-align: center;
  padding: 0.2rem 0;
  text-shadow: 0 0 14px currentColor;
}

/* Barra de progreso del upload */
.foto-terminal-barra-wrap {
  height: 4px;
  background: rgba(255,255,255,0.07);
  border-radius: 99px;
  overflow: hidden;
  margin-top: 0.5rem;
}
.foto-terminal-barra {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), #ffb347);
  border-radius: 99px;
  transition: width 18ms linear;
  box-shadow: 0 0 8px rgba(236,122,8,0.6);
}

/* =========================================================================
   PIXEL AVATAR — estilo inspirado en Pokémon / Zelda
   Fuente: Press Start 2P (ya cargada por las clases del portal)
   ========================================================================= */

/* Carga la fuente pixel si no estaba ya disponible */
@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap');

/* Base compartida entre tamaños */
.pixel-avatar--sm,
.pixel-avatar--lg {
  --av-color: #EC7A08;
  --av-dark:  color-mix(in srgb, var(--av-color) 60%, #000);
  --av-light: color-mix(in srgb, var(--av-color) 40%, #fff);

  display:         flex;
  align-items:     center;
  justify-content: center;
  font-family:     'Press Start 2P', 'Courier New', monospace;
  font-weight:     400;
  color:           #fff;
  background:      var(--av-color);
  image-rendering: pixelated;
  border-radius:   4px;           /* esquinas levemente cuadradas, no circular */
  position:        relative;
  flex-shrink:     0;
  text-shadow:     2px 2px 0 rgba(0,0,0,0.6);
  line-height:     1;

  /* Borde estilo pixel: borde negro exterior + reflejo claro interior */
  box-shadow:
    0 0 0 2px #000,                       /* borde negro */
    inset 2px 2px 0 var(--av-light),      /* brillo esquina superior-izq */
    inset -2px -2px 0 var(--av-dark);     /* sombra esquina inferior-der */
}

/* Tamaño pequeño — sidebar (sustituye al círculo anterior) */
.pixel-avatar--sm {
  width:     38px;
  height:    38px;
  font-size: 9px;
  letter-spacing: -1px;
}

/* Tamaño grande — sección de perfil */
.pixel-avatar--lg {
  width:     80px;
  height:    80px;
  font-size: 16px;
  letter-spacing: 0;
}

/* Píxel decorativo en la esquina superior derecha (estrella de 1px) */
.pixel-avatar--lg::after {
  content:  '★';
  position: absolute;
  top:      -6px;
  right:    -6px;
  font-size: 10px;
  color:    #fff;
  text-shadow: 1px 1px 0 #000;
  font-family: sans-serif;
}

/* Hint de "avatar automático" en la sección perfil */
.perfil-avatar-hint {
  font-family: 'Press Start 2P', monospace;
  font-size:   0.55rem;
  color:       rgba(255,255,255,0.2);
  letter-spacing: 0.04em;
  margin-top:  0.35rem;
}

/* =========================================================================
   RESPONSIVE COMPLETO — PORTAL RUMBO
   Breakpoints: 900px (tablet) · 640px (mobile)
   ========================================================================= */

/* ── Logo real en el sidebar ─────────────────────────────────────────── */
.sidebar__logo-img {
  width: 110px;
  height: auto;
  object-fit: contain;
  display: block;
  /* Blending para que el fondo del PNG se integre con el sidebar */
  mix-blend-mode: lighten;
}

/* ── Estado: no iniciada (pill + mini-class) ─────────────────────────── */
.mini-class--pending {
  background: var(--dark-3);
  border: 1px solid rgba(255,255,255,0.1);
  cursor: pointer;
}
.mini-class--pending:hover { border-color: rgba(236,122,8,0.3); transform: translateY(-2px); }
.mini-class--pending .mini-class__num  { color: rgba(255,255,255,0.45); }
.mini-class--pending .mini-class__status { color: rgba(255,255,255,0.3); }

.class-row--pending { border-color: rgba(255,255,255,0.08); background: rgba(255,255,255,0.01); }
.class-row--pending:hover { border-color: rgba(236,122,8,0.25); transform: translateX(4px); }
.class-row--pending .class-row__num-badge { background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.4); }

.pill--pending {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.45);
}

/* ── Login legal en 2 líneas ─────────────────────────────────────────── */
.login-legal-wrap {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.07);
}
.login-legal-line {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
}
.login-legal-link {
  font-family: var(--font-title);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  transition: opacity 150ms;
}
.login-legal-link:hover { opacity: 0.8; }

/* ── Logo real en el login ───────────────────────────────────────────── */
.login-logo-wrap { margin-bottom: 0.75rem; }
.login-logo-img  { height: 48px; width: auto; object-fit: contain; display: block; }

/* ── Hamburguesa y overlay del sidebar ───────────────────────────────── */
.topbar__left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.topbar__hamburger {
  display: none;          /* oculto en desktop */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 150ms;
}
.topbar__hamburger:hover { background: rgba(255,255,255,0.1); }
.topbar__hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: rgba(255,255,255,0.7);
  border-radius: 2px;
  transition: all 200ms;
}

/* ───────── SIDEBAR / MENÚ LATERAL EN CELULAR ───────── */
@media (max-width: 768px) {

  /* Botón hamburguesa visible en celular */
  .topbar__hamburger {
    display: flex;
  }

  /* Sidebar por encima del contenido y del overlay */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 300;
    pointer-events: auto;
  }

  /* Sidebar abierto: clickeable */
  .sidebar--open {
    z-index: 300;
    pointer-events: auto;
  }

  /* Capa oscura detrás del sidebar */
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 100;
    pointer-events: auto;
  }



  /* Mostrar overlay cuando el menú está abierto */
  .sidebar-overlay--visible {
    display: block;
  }

  /* Opciones del menú clickeables */
  .nav-item {
    cursor: pointer;
    pointer-events: auto;
    position: relative;
    z-index: 301;
  }
}
/* =========================================================================
   SIDEBAR — Botón de colapso escritorio y modo colapsado
   ========================================================================= */

/* ── Botón de colapso — ícono tipo panel/sidebar, solo desktop ────────────── */
.sidebar__collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.2);
  transition: color 150ms, background 150ms;
  cursor: pointer;
}
.sidebar__collapse-btn:hover {
  color: var(--primary);
  background: rgba(236,122,8,0.08);
}
.sidebar__collapse-icon {
  transition: opacity 200ms;
  display: block;
}
.sidebar__collapse-label { display: none; }

/* ── Modo colapsado (body.portal-sidebar-collapsed) ─────────────────────── */
.portal-sidebar-collapsed .sidebar {
  width: var(--sidebar-collapsed-w);
  overflow: hidden;
}
.portal-sidebar-collapsed .portal-main {
  margin-left: var(--sidebar-collapsed-w);
}

/* Ocultar textos y elementos no esenciales */
.portal-sidebar-collapsed .sidebar__tagline,
.portal-sidebar-collapsed .sidebar__user-name,
.portal-sidebar-collapsed .sidebar__user-role,
.portal-sidebar-collapsed .sidebar__nav-label,
.portal-sidebar-collapsed .sidebar__collapse-label {
  display: none;
}

/* Logo: brand-top centrado en modo colapsado */
.portal-sidebar-collapsed .sidebar__brand {
  padding: 0.75rem 0;
}
.portal-sidebar-collapsed .sidebar__brand-top {
  justify-content: center;
  margin-bottom: 0;
}
.portal-sidebar-collapsed .sidebar__logo-img {
  display: none; /* ocultar logo, solo queda el botón */
}
.portal-sidebar-collapsed .sidebar__logo {
  display: none;
}

/* Avatar: centrar sin texto */
.portal-sidebar-collapsed .sidebar__user {
  justify-content: center;
  padding: 0.75rem 0;
}
.portal-sidebar-collapsed .sidebar__user > div:last-child {
  display: none;
}

/* Nav items: solo icono centrado */
.portal-sidebar-collapsed .sidebar__nav {
  padding: 0.75rem 0;
}
.portal-sidebar-collapsed .nav-item {
  justify-content: center;
  padding: 0.65rem 0;
  border-radius: 0;
  gap: 0;
  font-size: 0;          /* oculta el texto */
}
.portal-sidebar-collapsed .nav-item__icon {
  font-size: 1.2rem;     /* mantiene el icono visible */
  width: auto;
}

/* Badge: posición absoluta sobre el icono */
.portal-sidebar-collapsed .nav-item__badge {
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 0.5rem;
  padding: 0.05rem 0.3rem;
}
.portal-sidebar-collapsed .nav-item {
  position: relative;
}

/* Footer colapsado: solo contiene el logout mobile, nada más que ajustar */
.portal-sidebar-collapsed .sidebar__footer {
  padding: 0.75rem 1rem;
}

/* Transición suave del sidebar y del main */
.sidebar {
  transition: width 260ms ease;
}
.portal-main {
  transition: margin-left 260ms ease;
}

/* Mejoras de hover y activo (sutiles, solo escritorio) */
@media (min-width: 901px) {
  .nav-item:hover {
    background: rgba(236,122,8,0.08);
    color: rgba(255,255,255,0.85);
  }
  .nav-item--active {
    background: rgba(236,122,8,0.14);
    color: var(--primary);
    box-shadow: inset 2px 0 0 var(--primary);
  }
}

/* ── TABLET — 900px ──────────────────────────────────────────────────── */
@media (max-width: 900px) {

  /* En mobile, el modo colapsado NO aplica para no interferir con el drawer */
  .portal-sidebar-collapsed .sidebar {
    width: var(--sidebar-w);
  }
  .portal-sidebar-collapsed .portal-main {
    margin-left: 0;
  }
  /* Ocultar botón de colapso en mobile */
  .sidebar__collapse-btn {
    display: none;
  }

  /* Sidebar mobile: fondo más suave, con blur y borde */
  .sidebar {
    background: rgba(10,10,10,0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-right: 1px solid rgba(255,255,255,0.08);
    box-shadow: none;
  }
  .sidebar--open {
    box-shadow: 6px 0 40px rgba(0,0,0,0.5);
  }

  /* Logout: visible en mobile dentro del drawer */
  .sidebar__logout--mobile {
    display: flex;
    color: rgba(255,255,255,0.5);
    font-size: 0.82rem;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.08);
    justify-content: center;
    gap: 0.5rem;
    transition: all 150ms;
  }
  .sidebar__logout--mobile:hover {
    color: #f87171;
    background: rgba(239,68,68,0.08);
    border-color: rgba(239,68,68,0.2);
  }

  /* Sidebar se convierte en drawer lateral */
  .sidebar {
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 280ms ease;
    box-shadow: none;
  }
  .sidebar--open {
    transform: translateX(0);
    box-shadow: 4px 0 40px rgba(0,0,0,0.6);
  }

  /* El main ocupa todo el ancho */
  .portal-main  { margin-left: 0; }

  /* Mostrar hamburguesa */
  .topbar__hamburger { display: flex; }

  /* Topbar ajustada */
  .portal-topbar {
    padding: 0 1rem;
    height: 56px;
  }

  /* Stats en 2 columnas */
  .stats-row { grid-template-columns: repeat(2, 1fr); }

  /* Mini grid 2 columnas */
  .classes-mini-grid { grid-template-columns: repeat(2, 1fr); }

  /* Logros en 1 columna */
  .logros-grid .logro-card { flex-direction: row; }

  /* Resultados - ocultar barra en tablet */
  .res-row__info { min-width: 0; }

  /* Perfil - campos en 1 columna */
  .pf-row { grid-template-columns: 1fr; }
  .cf-row { grid-template-columns: 1fr; }

  /* Acciones de contraseña en columna */
  .pf-pass-actions { flex-direction: column; }
  .pf-pass-actions .btn { width: 100%; justify-content: center; }

  /* Iframe de clase - altura reducida */
  .clase-frame { height: 55vh; }
}

/* ── MOBILE — 640px ──────────────────────────────────────────────────── */
@media (max-width: 640px) {

  /* Stats en 2 columnas compactas */
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.65rem;
  }
  .stat-card { padding: 1rem; }
  .stat-card__value { font-size: 1.4rem; }

  /* Mini grid 2 columnas */
  .classes-mini-grid { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }

  /* Logros stacked */
  .logros-grid .logro-card { flex-direction: row; gap: 1rem; padding: 1rem; }
  .logro-card__icon { font-size: 1.5rem; width: 36px; }

  /* Resultados compactos */
  .res-row { flex-wrap: wrap; gap: 0.75rem; }
  .res-row__right { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 0.5rem; width: 100%; }
  .res-barra-track { display: none; } /* quitar barra en mobile */

  /* Portal content más padding */
  .portal-content { padding: 1.25rem; }

  /* Topbar más compacta */
  .topbar__title    { font-size: 0.85rem; }
  .topbar__breadcrumb { display: none; } /* ocultar breadcrumb en mobile */
  .topbar__streak   { font-size: 0.8rem; padding: 0.25rem 0.6rem; }

  /* Botón "cerrar sesión" del topbar: solo ícono en mobile */
  .topbar__right .btn--ghost { display: none; }

  /* Clase row - mobile */
  .class-row { flex-wrap: wrap; gap: 0.5rem; padding: 0.85rem 1rem; }
  .class-row__right { flex-direction: row; flex-wrap: wrap; gap: 0.4rem; width: 100%; }
  .class-row__score { font-size: 0.78rem; }

  /* Misión actual - mobile */
  .current-class { flex-direction: column; gap: 1rem; }
  .current-class .btn { width: 100%; justify-content: center; }
  .current-class__icon { font-size: 2rem; }

  /* Login - caja más ajustada */
  .login-box { padding: 2rem 1.25rem; }
  .login-title { font-size: 1.25rem; }

  /* Clase nav - botones apilados */
  .clase-nav { flex-direction: column; gap: 0.75rem; }
  .clase-nav__btn { width: 100%; text-align: center; }

  /* Iframe más alto en mobile para compensar el ancho */
  .clase-frame { height: 65vh; }

  /* Perfil avatar section - columna en mobile */
  .perfil-avatar-section { flex-direction: column; text-align: center; }

  /* Achievements 2 columnas */
  .achievements { grid-template-columns: repeat(2, 1fr); }
}

/* =========================================================================
   BUZÓN — Fase 4 · Mis consultas
   ========================================================================= */

/* ── Lista de tarjetas ───────────────────────────────────────────────────── */
.buzon-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ── Tarjeta de consulta ─────────────────────────────────────────────────── */
.bz-card {
  background: var(--dark-2);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 200ms;
}
.bz-card:hover              { border-color: rgba(255,255,255,0.13); }
.bz-card--open              { border-color: rgba(236,122,8,0.25); }

/* Acento de color en el borde izquierdo según estado */
.bz-card:has(.bz-estado--pendiente)  { border-left: 3px solid var(--primary); }
.bz-card:has(.bz-estado--respondida) { border-left: 3px solid #4ade80; }
.bz-card:has(.bz-estado--revision)   { border-left: 3px solid #facc15; }
.bz-card:has(.bz-estado--cerrada)    { border-left: 3px solid rgba(255,255,255,0.15); }

/* ── Header de la tarjeta ────────────────────────────────────────────────── */
.bz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  gap: 1rem;
  cursor: pointer;
  user-select: none;
}
.bz-header:hover { background: rgba(255,255,255,0.025); }
.bz-header__left {
  display: flex; align-items: center; gap: 0.85rem; flex: 1; min-width: 0;
}
.bz-icon {
  font-size: 1.3rem; flex-shrink: 0; width: 32px; text-align: center;
}
.bz-info { min-width: 0; }
.bz-motivo {
  font-family: var(--font-title); font-weight: 700; font-size: 0.88rem;
  color: var(--white); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.bz-fecha {
  font-size: 0.72rem; color: rgba(255,255,255,0.35); margin-top: 0.1rem;
}
.bz-header__right {
  display: flex; align-items: center; gap: 0.6rem; flex-shrink: 0;
}

/* ── Código de consulta copiable ─────────────────────────────────────────── */
.bz-codigo {
  font-family: 'Share Tech Mono', 'Courier New', monospace;
  font-size: 0.6rem;
  color: var(--primary);
  background: rgba(236,122,8,0.08);
  border: 1px solid rgba(236,122,8,0.2);
  border-radius: var(--radius-full);
  padding: 0.15rem 0.55rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
  outline: none;
  line-height: inherit;
  font-weight: inherit;
}
.bz-codigo--copy {
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 0.25rem;
  transition: background 150ms, border-color 150ms;
}
.bz-codigo--copy:hover {
  background: rgba(236,122,8,0.16);
  border-color: rgba(236,122,8,0.38);
}

/* ── Pill de estado ──────────────────────────────────────────────────────── */
.bz-estado {
  font-family: var(--font-title); font-size: 0.6rem; font-weight: 700;
  padding: 0.2rem 0.65rem; border-radius: var(--radius-full); border: 1px solid;
  text-transform: uppercase; letter-spacing: 0.06em; white-space: nowrap;
}
.bz-estado--pendiente {
  background: rgba(236,122,8,0.1); color: var(--primary); border-color: rgba(236,122,8,0.25);
}
.bz-estado--respondida {
  background: rgba(34,197,94,0.08); color: #4ade80; border-color: rgba(34,197,94,0.2);
}
.bz-estado--revision {
  background: rgba(250,204,21,0.08); color: #facc15; border-color: rgba(250,204,21,0.2);
}
.bz-estado--cerrada {
  background: rgba(255,255,255,0.04); color: rgba(255,255,255,0.3); border-color: rgba(255,255,255,0.1);
}

/* ── Chevron ─────────────────────────────────────────────────────────────── */
.bz-chevron {
  color: rgba(255,255,255,0.25); font-size: 0.72rem;
  transition: transform 250ms; flex-shrink: 0;
}
.bz-card--open .bz-chevron { transform: rotate(180deg); }

/* ── Detalle expandible ──────────────────────────────────────────────────── */
.bz-detail {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 1.25rem;
  display: none;
}
.bz-card--open .bz-detail { display: block; }

/* ── Historial de mensajes ───────────────────────────────────────────────── */
.bz-historial-wrap { margin-bottom: 1.25rem; }
.bz-historial-label {
  font-family: var(--font-title); font-size: 0.58rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; color: rgba(255,255,255,0.22);
  margin-bottom: 0.75rem;
}
.bz-historial {
  display: flex; flex-direction: column; gap: 0.6rem;
  max-height: 320px; overflow-y: auto; padding-right: 0.2rem;
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.08) transparent;
}
.bz-historial::-webkit-scrollbar { width: 4px; }
.bz-historial::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 99px; }

/* ── Burbujas de mensajes ────────────────────────────────────────────────── */
.bz-msg {
  max-width: 80%;
  padding: 0.65rem 0.9rem;
  border-radius: 10px;
  line-height: 1.55;
}
.bz-msg--estudiante {
  align-self: flex-end;
  background: rgba(236,122,8,0.1);
  border: 1px solid rgba(236,122,8,0.2);
  border-bottom-right-radius: 3px;
}
.bz-msg--admin {
  align-self: flex-start;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-bottom-left-radius: 3px;
}
.bz-msg__meta {
  display: flex; gap: 0.5rem; align-items: baseline; margin-bottom: 0.3rem;
}
.bz-msg__autor {
  font-family: var(--font-title); font-size: 0.63rem; font-weight: 700;
}
.bz-msg--admin    .bz-msg__autor { color: #4ade80; }
.bz-msg--estudiante .bz-msg__autor { color: var(--primary); }
.bz-msg__fecha { font-size: 0.58rem; color: rgba(255,255,255,0.25); }
.bz-msg__texto {
  font-size: 0.85rem; color: var(--white);
  white-space: pre-wrap; word-break: break-word;
}
.bz-msg-sistema {
  align-self: center; font-size: 0.68rem;
  color: rgba(255,255,255,0.25); font-style: italic;
  text-align: center; padding: 0.25rem 0;
}

/* ── Formulario de respuesta ─────────────────────────────────────────────── */
.bz-reply-form { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 1rem; }
.bz-reply-input {
  width: 100%;
  background: var(--dark-3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  color: var(--white);
  font-family: var(--font-body); font-size: 0.88rem;
  padding: 0.75rem 1rem;
  resize: vertical; min-height: 80px;
  outline: none; transition: border-color 200ms;
}
.bz-reply-input:focus { border-color: rgba(236,122,8,0.4); }
.bz-reply-actions { margin-top: 0.75rem; display: flex; justify-content: flex-end; }

/* ── Nota consulta cerrada ───────────────────────────────────────────────── */
.bz-cerrada-note {
  font-size: 0.82rem; color: rgba(255,255,255,0.3);
  font-style: italic; text-align: center;
  padding: 0.75rem 0; border-top: 1px solid rgba(255,255,255,0.06);
}

/* ── Estado vacío ────────────────────────────────────────────────────────── */
.buzon-empty {
  text-align: center; padding: 3rem 1rem;
  font-family: var(--font-title); font-size: 0.85rem;
  color: rgba(255,255,255,0.35);
}
.buzon-empty__icon  { font-size: 2.2rem; margin-bottom: 0.75rem; opacity: 0.6; }
.buzon-empty__title {
  font-weight: 700; font-size: 0.95rem;
  color: rgba(255,255,255,0.5); margin-bottom: 0.35rem;
}
.buzon-empty__sub { font-family: var(--font-body); font-size: 0.82rem; }

/* ── Spinner ─────────────────────────────────────────────────────────────── */
.bz-spinner {
  display: block; width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,0.1);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: bz-spin 700ms linear infinite;
  margin: 0 auto;
}
.bz-spinner--sm { width: 14px; height: 14px; }
@keyframes bz-spin { to { transform: rotate(360deg); } }

/* ── Toast del buzón ─────────────────────────────────────────────────────── */
.bz-toast {
  position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%) translateY(12px);
  background: var(--dark-3); border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-full); padding: 0.55rem 1.25rem;
  font-family: var(--font-title); font-size: 0.78rem; font-weight: 700;
  color: var(--white); white-space: nowrap;
  z-index: 9000; opacity: 0; pointer-events: none;
  transition: opacity 250ms, transform 250ms;
}
.bz-toast--ok      { border-color: rgba(74,222,128,0.3); color: #4ade80; }
.bz-toast--error   { border-color: rgba(248,113,113,0.3); color: #f87171; }
.bz-toast--visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Responsive buzón ────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .bz-header       { padding: 0.85rem 1rem; gap: 0.6rem; }
  .bz-detail       { padding: 1rem; }
  .bz-msg          { max-width: 92%; }
  /* bz-codigo: visible en mobile para que el estudiante pueda copiarlo */
  .bz-header__right { gap: 0.4rem; }
}

/* ── FIX DEFINITIVO: logout visible en sidebar mobile ───────────────── */

@media (max-width: 900px) {
  .sidebar {
    height: 100dvh;
    max-height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .sidebar__nav {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 5.5rem; /* deja espacio para el botón fijo */
  }

  .sidebar__footer {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    bottom: env(safe-area-inset-bottom, 0px);
    padding: 0.85rem 1rem calc(0.85rem + env(safe-area-inset-bottom, 0px));
    background: linear-gradient(
      180deg,
      rgba(10,10,10,0) 0%,
      rgba(10,10,10,0.96) 25%,
      rgba(10,10,10,1) 100%
    );
    border-top: 1px solid rgba(236,122,8,0.2);
    z-index: 400;
  }

  .sidebar__logout.sidebar__logout--mobile {
    display: flex !important;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    width: 100%;
    min-height: 46px;
    padding: 0.85rem 1rem;
    border-radius: 999px;
    border: 1px solid rgba(236,122,8,0.55);
    background: rgba(236,122,8,0.14);
    color: var(--primary);
    font-family: var(--font-title);
    font-size: 0.84rem;
    font-weight: 800;
    box-shadow: 0 0 22px rgba(236,122,8,0.12);
  }

  .sidebar__logout.sidebar__logout--mobile:hover,
  .sidebar__logout.sidebar__logout--mobile:focus-visible {
    color: #fff;
    background: rgba(236,122,8,0.22);
    border-color: var(--primary);
    outline: none;
  }
}