/* =============================================
   ENGLISH ACADEMY RVN — historias.css
   Módulo: Historias Increíbles (301 historias)
   Prefijo: .hi-
   ============================================= */

body {
    background: var(--bg-darker);
    color: var(--text-primary);
    font-family: 'Poppins', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ═══════════════════════════════════════════
   NAV
═══════════════════════════════════════════ */
.hi-nav {
    position: sticky;
    top: 0;
    z-index: 200;
    background: rgba(9, 14, 22, 0.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(20px);
}
.hi-nav-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.hi-nav-left  { display: flex; align-items: center; gap: 20px; min-width: 0; }
.hi-nav-right { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.hi-logo {
    font-size: 0.9375rem;
    font-weight: 800;
    white-space: nowrap;
    flex-shrink: 0;
    color: var(--text-primary);
    text-decoration: none;
}
.hi-logo span { color: var(--primary-light); }

.hi-breadcrumb {
    display: flex; align-items: center; gap: 6px;
    font-size: 0.75rem; color: var(--text-muted);
}
.hi-breadcrumb a { color: var(--text-muted); text-decoration: none; transition: var(--transition); }
.hi-breadcrumb a:hover { color: var(--primary-light); }
.hi-breadcrumb i { font-size: 0.5625rem; }
.hi-breadcrumb .active { color: var(--text-secondary); }

/* Plan badge */
.hi-nav-plan { display: flex; align-items: center; }
.nav-plan-free {
    display: flex; align-items: center; gap: 6px;
    font-size: 0.75rem; color: var(--text-secondary);
    background: var(--primary-glow);
    border: 1px solid var(--border);
    border-radius: 20px; padding: 4px 12px; white-space: nowrap;
}
.nav-plan-free i { color: var(--text-muted); font-size: 0.6875rem; }
.nav-upgrade-link { color: var(--primary-light); font-weight: 600; text-decoration: none; }
.nav-upgrade-link:hover { text-decoration: underline; }
.nav-plan-premium {
    display: none; align-items: center; gap: 6px;
    font-size: 0.75rem; color: var(--premium-gold);
    background: rgba(255, 215, 0, 0.08);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 20px; padding: 4px 12px;
}

/* Font switcher */
.font-switcher {
    display: flex; align-items: center;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 10px; padding: 3px; gap: 2px;
}
.fs-btn {
    padding: 4px 10px; border-radius: 7px; border: none;
    background: none; color: var(--text-muted); cursor: pointer;
    font-family: 'Poppins', sans-serif; font-weight: 700;
    transition: var(--transition); line-height: 1;
}
.fs-btn:nth-child(1) { font-size: 0.6875rem; }
.fs-btn:nth-child(2) { font-size: 0.875rem; }
.fs-btn:nth-child(3) { font-size: 1.0625rem; }
.fs-btn.active { background: var(--primary); color: #fff; }
.fs-btn:hover:not(.active) { background: var(--primary-glow); color: var(--primary-light); }

/* Theme btn */
.theme-dot-nav {
    width: 34px; height: 34px; border-radius: 10px;
    border: 1px solid var(--border); background: var(--bg-dark);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; color: var(--text-muted); font-size: 0.875rem;
    transition: var(--transition);
}
.theme-dot-nav:hover { border-color: var(--border-hover); color: var(--primary-light); }

/* User chip */
.hi-user-chip {
    display: flex; align-items: center; gap: 7px;
    background: var(--primary-glow);
    border: 1px solid var(--border);
    border-radius: 20px; padding: 4px 12px 4px 4px;
    text-decoration: none; transition: var(--transition);
}
.hi-user-chip:hover { border-color: var(--border-hover); }
.hi-avatar {
    width: 28px; height: 28px; border-radius: 50%;
    background: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.75rem; font-weight: 700; color: #fff;
}
.hi-user-chip span { font-size: 0.75rem; color: var(--text-secondary); }

/* Logout */
.hi-logout {
    width: 34px; height: 34px; border-radius: 10px;
    border: 1px solid var(--border); background: var(--bg-dark);
    color: var(--text-muted); cursor: pointer; font-size: 0.875rem;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}
.hi-logout:hover { border-color: rgba(229, 57, 53, 0.4); color: #ef5350; }

/* ═══════════════════════════════════════════
   LAYOUT
═══════════════════════════════════════════ */
.hi-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    min-height: calc(100vh - 60px);
    max-width: 1400px;
    margin: 0 auto;
}

/* ═══════════════════════════════════════════
   SIDEBAR
═══════════════════════════════════════════ */
.hi-sidebar {
    background: var(--bg-dark);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 60px;
    height: calc(100vh - 60px);
    overflow: hidden;
}
.hi-sb-header {
    padding: 14px 14px 10px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.hi-sb-title-row {
    display: flex; align-items: center; justify-content: space-between;
}
.hi-sb-title-row h2 {
    font-size: 0.8125rem; font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase; letter-spacing: 0.05em;
    display: flex; align-items: center; gap: 6px;
}
.hi-sb-title-row h2 i { color: var(--primary-light); font-size: 0.875rem; }
.hi-sb-badge {
    font-size: 0.6875rem;
    background: var(--primary-glow);
    border: 1px solid var(--border);
    border-radius: 20px; padding: 2px 8px;
    color: var(--primary-light);
}

/* Filtro categorías */
.hi-cat-filter {
    display: flex; flex-wrap: wrap; gap: 5px;
}
.hi-cat-btn {
    font-size: 0.625rem; font-weight: 600;
    padding: 3px 8px; border-radius: 12px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer; transition: var(--transition);
    font-family: 'Poppins', sans-serif;
    white-space: nowrap;
}
.hi-cat-btn:hover { border-color: var(--border-hover); color: var(--text-secondary); }
.hi-cat-btn.active {
    background: var(--primary-glow);
    color: var(--primary-light);
    border-color: var(--border-hover);
}

/* Búsqueda */
.hi-sb-search {
    position: relative;
}
.hi-sb-search i {
    position: absolute; left: 10px; top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted); font-size: 0.75rem;
    pointer-events: none;
}
.hi-sb-search input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px 10px 8px 30px;
    color: var(--text-primary);
    font-size: 0.75rem; font-family: 'Poppins', sans-serif;
    outline: none; transition: var(--transition);
}
.hi-sb-search input::placeholder { color: var(--text-muted); }
.hi-sb-search input:focus { border-color: var(--border-hover); }

/* Lista sidebar */
.hi-sb-list {
    overflow-y: auto; flex: 1;
}
.hi-sb-list::-webkit-scrollbar { width: 4px; }
.hi-sb-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* Item sidebar */
.hi-sb-item {
    padding: 10px 14px;
    cursor: pointer;
    border-bottom: 1px solid rgba(74, 144, 217, 0.06);
    transition: var(--transition);
    display: flex; flex-direction: column; gap: 3px;
}
.hi-sb-item:hover { background: var(--primary-glow); }
.hi-sb-item.active {
    background: var(--primary-glow);
    border-left: 3px solid var(--primary);
    padding-left: 11px;
}
.hi-sb-item.locked { opacity: 0.45; }

.hi-sb-item-top {
    display: flex; align-items: center; gap: 8px;
}
.hi-sb-num {
    font-size: 0.5625rem; color: var(--text-muted);
    font-weight: 600; flex-shrink: 0;
}
.hi-sb-name {
    font-size: 0.75rem; font-weight: 600;
    color: var(--text-primary); line-height: 1.3;
    flex: 1; min-width: 0;
}
.hi-sb-cat {
    font-size: 0.5625rem; color: var(--primary-light);
    background: var(--primary-glow);
    border: 1px solid var(--border);
    border-radius: 8px; padding: 1px 6px;
    white-space: nowrap; flex-shrink: 0;
}
.hi-sb-meta {
    display: flex; align-items: center; gap: 6px;
    padding-left: 30px;
}
.hi-sb-level {
    font-size: 0.5625rem; color: var(--text-muted);
    font-weight: 600;
}
.hi-sb-time { font-size: 0.5625rem; color: var(--text-muted); }
.hi-sb-lock { font-size: 0.625rem; color: var(--text-muted); margin-left: auto; }

.hi-sb-more {
    padding: 12px 14px;
    font-size: 0.6875rem; color: var(--text-muted);
    text-align: center;
    border-top: 1px solid var(--border);
}

/* ═══════════════════════════════════════════
   MAIN
═══════════════════════════════════════════ */
.hi-main {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: var(--bg-darker);
    min-height: calc(100vh - 60px);
}

/* Estado vacío */
.hi-empty {
    flex: 1;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    gap: 12px; text-align: center;
    color: var(--text-muted); padding: 60px 20px;
}
.hi-empty-icon {
    width: 80px; height: 80px; border-radius: 50%;
    background: var(--primary-glow); border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem; margin-bottom: 8px;
}
.hi-empty h3 { font-size: 1.125rem; color: var(--text-secondary); font-weight: 600; }
.hi-empty p { font-size: 0.875rem; max-width: 280px; line-height: 1.6; }

/* ═══════════════════════════════════════════
   ITEM HEADER
═══════════════════════════════════════════ */
.hi-item-header {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.hi-ih-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}
.hi-ih-info { flex: 1; min-width: 0; }
.hi-ih-category {
    font-size: 0.6875rem; font-weight: 700;
    color: var(--primary-light);
    text-transform: uppercase; letter-spacing: 0.06em;
    margin-bottom: 4px;
}
.hi-ih-title {
    font-size: 1.0625rem; font-weight: 700;
    color: var(--text-primary); line-height: 1.3;
    margin-bottom: 8px;
}
.hi-ih-meta {
    display: flex; gap: 6px; flex-wrap: wrap;
}
.hi-pill {
    font-size: 0.6875rem; border-radius: 20px;
    padding: 3px 10px; border: 1px solid var(--border);
    background: var(--primary-glow); color: var(--text-secondary);
    display: inline-flex; align-items: center; gap: 4px;
}
.hi-pill-level {
    background: rgba(74,144,217,0.15);
    color: var(--primary-light);
    border-color: var(--border-hover);
    font-weight: 700;
}

/* Botón cambiar historia */
.hi-btn-cambiar { display: none; }

/* Resumen */
.hi-summary {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.6;
    font-style: italic;
    border-left: 3px solid var(--primary);
    padding-left: 12px;
}

/* ═══════════════════════════════════════════
   CONTROLES
═══════════════════════════════════════════ */
.hi-controls {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 14px 18px;
    display: flex; flex-direction: column; gap: 12px;
}
.hi-ctrl-row {
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.hi-ctrl-row-audio { gap: 12px; }
.hi-ctrl-label { font-size: 0.6875rem; color: var(--text-muted); white-space: nowrap; }
.hi-ctrl-divider { border: none; border-top: 1px solid var(--border); margin: 0; }
.hi-ctrl-sep { width: 1px; height: 22px; background: var(--border); flex-shrink: 0; }

/* Chips de párrafo */
.hi-para-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.hi-chip {
    font-size: 0.6875rem; padding: 4px 12px;
    border-radius: 20px; border: 1px solid var(--border);
    background: transparent; color: var(--text-secondary);
    cursor: pointer; transition: var(--transition);
    font-family: 'Poppins', sans-serif; font-weight: 600;
}
.hi-chip:hover { border-color: var(--border-hover); color: var(--text-primary); }
.hi-chip.active {
    background: var(--primary-glow);
    color: var(--primary-light);
    border-color: var(--border-hover);
}

/* Selects */
.hi-sel-wrap { display: flex; align-items: center; gap: 6px; }
.hi-sel {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px; color: var(--text-secondary);
    font-size: 0.6875rem; padding: 5px 8px;
    font-family: 'Poppins', sans-serif; outline: none;
    cursor: pointer; transition: var(--transition);
}
.hi-sel:focus { border-color: var(--border-hover); }

/* Toggle subtítulos */
.hi-toggle-wrap {
    display: flex; align-items: center; gap: 7px;
    cursor: pointer; user-select: none;
}
.hi-toggle-track {
    width: 36px; height: 20px;
    background: var(--border); border-radius: 10px;
    position: relative; transition: background 0.25s ease; flex-shrink: 0;
}
.hi-toggle-track.on { background: var(--primary); }
.hi-toggle-knob {
    width: 14px; height: 14px; background: #fff;
    border-radius: 50%; position: absolute;
    top: 3px; left: 3px; transition: left 0.25s ease;
}
.hi-toggle-track.on .hi-toggle-knob { left: 19px; }
.hi-toggle-lbl { font-size: 0.6875rem; color: var(--text-secondary); white-space: nowrap; }
.hi-toggle-lbl.on { color: var(--primary-light); }

/* ═══════════════════════════════════════════
   BARRA DE PROGRESO
═══════════════════════════════════════════ */
.hi-progress-bar {
    background: var(--bg-dark); border: 1px solid var(--border);
    border-radius: 20px; padding: 7px 16px;
    display: flex; align-items: center; gap: 10px;
}
.hi-prog-track {
    flex: 1; height: 4px; background: var(--border);
    border-radius: 4px; overflow: hidden;
}
.hi-prog-fill {
    height: 100%; background: var(--primary);
    border-radius: 4px; transition: width 0.4s ease;
}
.hi-prog-lbl {
    font-size: 0.6875rem; color: var(--text-muted);
    white-space: nowrap; min-width: 40px; text-align: right;
}

/* ═══════════════════════════════════════════
   ÁREA DE LECTURA
═══════════════════════════════════════════ */
.hi-reader {
    display: flex; flex-direction: column; gap: 14px;
}

/* Párrafo inglés */
.hi-para-en {
    background: linear-gradient(135deg, #1a2d42 0%, #1e3356 100%);
    border: 1px solid rgba(74,144,217,0.2);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    position: relative;
    overflow: hidden;
}
.hi-para-en::before {
    content: '';
    position: absolute; inset: 0;
    background: repeating-linear-gradient(
        transparent, transparent 27px,
        rgba(74, 144, 217, 0.04) 27px,
        rgba(74, 144, 217, 0.04) 28px
    );
    pointer-events: none;
}
.hi-para-label {
    display: flex; align-items: center; gap: 10px;
    font-size: 0.5625rem; color: var(--text-muted);
    font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.07em; margin-bottom: 12px;
    position: relative; z-index: 1;
}
.hi-pdots { display: flex; gap: 4px; }
.hi-pdot {
    width: 5px; height: 5px; border-radius: 50%;
    background: rgba(74, 144, 217, 0.2);
    transition: background 0.3s ease;
}
.hi-pdot.on { background: var(--primary); }
.hi-para-text {
    font-size: var(--mod-font-en, 1rem);
    font-weight: 500;
    color: #e8f0f8;
    line-height: 1.9;
    position: relative; z-index: 1;
}

/* Palabras clave */
.hi-words-wrap {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 14px 18px;
}
.hi-words-title {
    font-size: 0.6875rem; font-weight: 700;
    color: var(--primary-light);
    text-transform: uppercase; letter-spacing: 0.05em;
    margin-bottom: 10px;
    display: flex; align-items: center; gap: 6px;
}
.hi-words-title i { color: var(--premium-gold); }
.hi-words-list {
    display: flex; flex-direction: column; gap: 8px;
}
.hi-word-item {
    display: flex; flex-direction: column; gap: 2px;
    padding: 8px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: var(--transition);
}
.hi-word-item:hover { border-color: var(--border-hover); }
.hi-word-en {
    font-size: 0.875rem; font-weight: 700;
    color: var(--primary-light);
}
.hi-word-def-en {
    font-size: 0.75rem; color: var(--text-secondary);
    line-height: 1.4;
}
.hi-word-def-es {
    font-size: 0.6875rem; color: var(--text-muted);
    font-style: italic;
}

/* Párrafo español */
.hi-para-es {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 22px;
}
.hi-para-es-label {
    font-size: 0.5625rem; color: var(--text-muted);
    font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.07em; margin-bottom: 10px;
}
.hi-para-es-text {
    font-size: var(--mod-font-es, 0.9rem);
    color: #8fb3c8; line-height: 1.8; font-style: italic;
}
.hi-no-subs {
    display: flex; align-items: center; gap: 8px;
    font-size: 0.75rem; color: var(--text-muted);
    padding: 12px 0;
}

/* ═══════════════════════════════════════════
   BOTONES DE NAVEGACIÓN
═══════════════════════════════════════════ */
.hi-nav-btns {
    display: flex; gap: 8px;
}
.hi-btn {
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    padding: 10px 16px;
    cursor: pointer; font-size: 0.75rem;
    font-family: 'Poppins', sans-serif; font-weight: 600;
    transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
    gap: 6px; white-space: nowrap;
}
.hi-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }
.hi-btn:active { transform: scale(0.97); }

.hi-btn-ant { flex: 1; }
.hi-btn-next {
    flex: 2;
    background: var(--primary-glow);
    border-color: var(--border-hover);
    color: var(--primary-light);
}
.hi-btn-next:hover { background: rgba(74,144,217,0.18); }
.hi-btn-auto {
    flex: 1;
    background: rgba(76,175,80,0.08);
    border-color: rgba(76,175,80,0.28);
    color: #69db7c;
}
.hi-btn-auto:hover { background: rgba(76,175,80,0.15); }
.hi-btn-auto.running {
    background: rgba(76,175,80,0.18);
    border-color: rgba(76,175,80,0.5);
}
.hi-btn-sq { width: 42px; height: 42px; padding: 0; flex: none; }
.hi-btn-sq i { font-size: 0.875rem; }
.hi-btn-quiz {
    flex: 1.5;
    background: rgba(255,215,0,0.08);
    border-color: rgba(255,215,0,0.25);
    color: var(--premium-gold);
}
.hi-btn-quiz:hover { background: rgba(255,215,0,0.14); }

#btnReset:hover {
    background: rgba(255,152,0,0.08);
    border-color: rgba(255,152,0,0.3);
    color: #FFB74D;
}
.hi-btn-audio:hover {
    background: rgba(76,175,80,0.08);
    border-color: rgba(76,175,80,0.35);
    color: #69db7c;
}

/* ═══════════════════════════════════════════
   QUIZ
═══════════════════════════════════════════ */
.hi-quiz {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex; flex-direction: column; gap: 16px;
}
.hi-quiz-header {
    display: flex; align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
}
.hi-quiz-title {
    font-size: 0.9375rem; font-weight: 700;
    color: var(--text-primary);
    display: flex; align-items: center; gap: 8px;
}
.hi-quiz-prog {
    font-size: 0.75rem; color: var(--text-muted);
}
.hi-quiz-card {
    display: flex; flex-direction: column; gap: 14px;
}
.hi-quiz-q {
    font-size: 1rem; font-weight: 600;
    color: var(--text-primary); line-height: 1.5;
    padding: 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}
.hi-quiz-opts {
    display: flex; flex-direction: column; gap: 8px;
}
.hi-quiz-opt {
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem; font-family: 'Poppins', sans-serif;
    color: var(--text-secondary);
    text-align: left; transition: var(--transition);
}
.hi-quiz-opt:hover:not(.disabled) {
    border-color: var(--border-hover);
    background: var(--primary-glow);
    color: var(--primary-light);
}
.hi-quiz-opt.correct {
    background: rgba(76,175,80,0.12);
    border-color: rgba(76,175,80,0.4);
    color: #69db7c;
}
.hi-quiz-opt.wrong {
    background: rgba(229,57,53,0.1);
    border-color: rgba(229,57,53,0.3);
    color: #ef5350;
}
.hi-quiz-opt.disabled { cursor: default; }
.hi-quiz-feedback {
    font-size: 0.875rem; line-height: 1.5;
    color: var(--text-secondary); font-style: italic;
    min-height: 1.5em;
}
.hi-quiz-btns {
    display: flex; gap: 8px;
}

/* Resultado del quiz */
.hi-quiz-result {
    text-align: center;
    display: flex; flex-direction: column;
    align-items: center; gap: 12px;
    padding: 20px 0;
}
.hi-qr-emoji { font-size: 3rem; }
.hi-qr-score {
    font-size: 2.5rem; font-weight: 800;
    color: var(--primary-light);
}
.hi-qr-label { font-size: 1rem; color: var(--text-secondary); }

/* ═══════════════════════════════════════════
   PANEL TEMA FLOTANTE
═══════════════════════════════════════════ */
.theme-panel-float {
    position: fixed; top: 68px; right: 16px;
    z-index: 300; background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 12px;
    min-width: 200px; box-shadow: var(--shadow-lg);
}
.tpf-title {
    font-size: 0.6875rem; color: var(--text-muted);
    font-weight: 600; text-transform: uppercase;
    letter-spacing: 0.06em; margin-bottom: 8px; padding: 0 4px;
}
.tpf-opt {
    width: 100%; display: flex; align-items: center;
    gap: 8px; padding: 8px; border-radius: 8px;
    border: none; background: none; cursor: pointer;
    transition: var(--transition); font-family: 'Poppins', sans-serif;
    font-size: 0.8125rem; color: var(--text-secondary);
}
.tpf-opt:hover { background: var(--primary-glow); }
.tpf-opt.active { background: var(--primary-glow); color: var(--text-primary); }
.tpf-dots { display: flex; gap: 3px; }
.tpf-dot { width: 12px; height: 12px; border-radius: 50%; }
.tpf-check { margin-left: auto; color: var(--primary-light); font-size: 0.6875rem; display: none; }
.tpf-opt.active .tpf-check { display: block; }

/* ═══════════════════════════════════════════
   PREMIUM OVERLAY
═══════════════════════════════════════════ */
.hi-premium-overlay {
    position: fixed; inset: 0; z-index: 500;
    background: rgba(9, 14, 22, 0.88);
    backdrop-filter: blur(6px);
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
}
.hi-premium-modal {
    background: var(--bg-dark); border: 1px solid var(--border);
    border-radius: var(--radius-xl); padding: 32px 28px;
    max-width: 380px; width: 100%; text-align: center;
    box-shadow: var(--shadow-lg);
}
.hi-premium-icon { font-size: 2.5rem; margin-bottom: 12px; }
.hi-premium-modal h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
.hi-premium-modal p { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 18px; }
.hi-premium-perks {
    list-style: none; text-align: left; margin-bottom: 22px;
    display: flex; flex-direction: column; gap: 8px;
}
.hi-premium-perks li {
    font-size: 0.8125rem; color: var(--text-secondary);
    display: flex; align-items: center; gap: 8px;
}
.hi-premium-perks li i { color: var(--primary-light); font-size: 0.75rem; }
.hi-btn-upgrade {
    display: flex; align-items: center; justify-content: center;
    gap: 8px; width: 100%; padding: 12px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #FFD700, #FFA500);
    color: #1a1a1a; font-size: 0.9375rem; font-weight: 700;
    font-family: 'Poppins', sans-serif; text-decoration: none;
    margin-bottom: 10px; transition: var(--transition);
}
.hi-btn-upgrade:hover { box-shadow: var(--shadow-primary); transform: translateY(-1px); }
.hi-btn-back {
    width: 100%; padding: 10px;
    border-radius: var(--radius-md); border: 1px solid var(--border);
    background: none; color: var(--text-muted); font-size: 0.8125rem;
    font-family: 'Poppins', sans-serif; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    gap: 6px; transition: var(--transition);
}
.hi-btn-back:hover { border-color: var(--border-hover); color: var(--text-primary); }

/* ═══════════════════════════════════════════
   FAB MÓVIL
═══════════════════════════════════════════ */
.hi-fab { display: none; }
.hi-btn-cambiar { display: none; }

@media (max-width: 900px) {
    .hi-sidebar { display: none; }
    .hi-layout  { grid-template-columns: 1fr; }
    .hi-main    { padding: 16px; gap: 12px; padding-bottom: 80px; }

    .hi-fab {
        display: flex; align-items: center; gap: 8px;
        position: fixed; bottom: 20px; left: 50%;
        transform: translateX(-50%);
        z-index: 400; background: var(--primary); color: #fff;
        border: none; border-radius: 28px; padding: 12px 22px;
        font-size: 0.875rem; font-weight: 700;
        font-family: 'Poppins', sans-serif; cursor: pointer;
        box-shadow: 0 4px 20px rgba(74,144,217,0.45);
        transition: transform 0.2s ease, box-shadow 0.2s ease;
        white-space: nowrap;
    }
    .hi-fab:hover {
        transform: translateX(-50%) translateY(-2px);
        box-shadow: 0 6px 26px rgba(74,144,217,0.55);
    }
    .hi-fab i { font-size: 1rem; }
    .hi-fab-badge {
        background: rgba(255,255,255,0.22);
        border-radius: 20px; padding: 2px 8px;
        font-size: 0.6875rem; font-weight: 700;
    }

    .hi-btn-cambiar {
        display: flex; align-items: center; justify-content: center;
        width: 36px; height: 36px; flex-shrink: 0;
        border-radius: 10px; border: 1px solid var(--border);
        background: var(--primary-glow); color: var(--primary-light);
        cursor: pointer; font-size: 0.875rem; transition: var(--transition);
    }
    .hi-btn-cambiar:hover { border-color: var(--border-hover); background: rgba(74,144,217,0.18); }
}

/* ── NAV EN 2 FILAS ≤600px ── */
@media (max-width: 600px) {
    .hi-nav-inner {
        padding: 8px 14px; height: auto;
        flex-direction: column; align-items: stretch; gap: 6px;
    }
    .hi-nav-left  { justify-content: space-between; width: 100%; }
    .hi-nav-right { justify-content: flex-end; width: 100%; gap: 8px; }
    .hi-breadcrumb { display: none; }
    .hi-logo      { font-size: 0.875rem; }
    .font-switcher { display: none; }
    .hi-nav-plan  { display: none; }
    .hi-user-chip span { display: none; }
    .hi-user-chip { padding: 4px 6px 4px 4px; }

    .hi-main { padding: 12px; gap: 10px; }
    .hi-ih-title { font-size: 0.9375rem; }
    .hi-ctrl-row-audio { gap: 8px; }
    .hi-ctrl-sep { display: none; }
    .hi-chip { padding: 3px 9px; font-size: 0.625rem; }

    .hi-nav-btns {
        display: grid;
        grid-template-columns: 1fr 2fr 1fr;
        gap: 7px;
    }
    .hi-btn-ant  { grid-column: 1; }
    .hi-btn-next { grid-column: 2; }
    .hi-btn-auto { grid-column: 3; }
    #btnReset    { grid-column: 1; }
    #btnAudio    { grid-column: 3; }
    .hi-btn-quiz { grid-column: 2; }
}

@media (max-width: 380px) {
    .hi-para-chips { gap: 4px; }
    .hi-chip { padding: 2px 7px; }
}

/* ═══════════════════════════════════════════
   BOTTOM SHEET MÓVIL
═══════════════════════════════════════════ */
.hi-sheet-backdrop {
    display: none; position: fixed; inset: 0; z-index: 450;
    background: rgba(9,14,22,0.7); backdrop-filter: blur(4px);
}
.hi-sheet-backdrop.open { display: block; }

.hi-bottom-sheet {
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 460;
    background: var(--bg-dark); border-top: 1px solid var(--border);
    border-radius: 20px 20px 0 0;
    display: flex; flex-direction: column;
    max-height: 82vh;
    transform: translateY(100%);
    transition: transform 0.35s cubic-bezier(0.32,0.72,0,1);
    box-shadow: 0 -8px 40px rgba(0,0,0,0.5);
}
.hi-bottom-sheet.open { transform: translateY(0); }

.hi-sheet-handle {
    width: 40px; height: 4px;
    background: var(--border); border-radius: 4px;
    margin: 12px auto 8px; flex-shrink: 0;
}
.hi-sheet-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 16px 10px;
    border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.hi-sheet-title {
    display: flex; align-items: center; gap: 8px;
    font-size: 0.875rem; font-weight: 700; color: var(--text-primary);
}
.hi-sheet-title i { color: var(--primary-light); }
.hi-sheet-close {
    width: 32px; height: 32px; border-radius: 8px;
    border: 1px solid var(--border); background: none;
    color: var(--text-muted); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.875rem; transition: var(--transition);
}
.hi-sheet-close:hover { color: var(--text-primary); border-color: var(--border-hover); }

/* Filtro categorías en sheet */
.hi-sheet-cats {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    display: flex; flex-wrap: wrap; gap: 6px;
    flex-shrink: 0;
}

.hi-sheet-search {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    display: flex; align-items: center; gap: 8px;
    color: var(--text-muted); font-size: 0.75rem;
}
.hi-sheet-search input {
    flex: 1; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: 8px;
    padding: 7px 10px; color: var(--text-primary);
    font-size: 0.75rem; font-family: 'Poppins', sans-serif; outline: none;
}
.hi-sheet-search input:focus { border-color: var(--border-hover); }

.hi-sheet-list {
    overflow-y: auto; flex: 1; overscroll-behavior: contain;
}
.hi-sheet-list::-webkit-scrollbar { width: 4px; }
.hi-sheet-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }