/* =============================================
   ENGLISH ACADEMY RVN — unidades.css
   Módulo: Unidades (345 lecciones A1–C2)
   Prefijo: .un-
   ============================================= */

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

/* ══════════════════════════════════════════════
   NAV
══════════════════════════════════════════════ */
.un-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);
}
.un-nav-inner {
    max-width: 1400px; margin: 0 auto;
    padding: 0 20px;
    display: flex; align-items: center;
    justify-content: space-between;
    height: 60px; gap: 16px;
}
.un-nav-left  { display: flex; align-items: center; gap: 16px; min-width: 0; }
.un-nav-right { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

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

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

/* Plan badge */
.un-nav-plan { display: flex; align-items: center; gap: 8px; }
.nav-plan-free {
    display: flex; align-items: center; gap: 6px;
    font-size: 0.75rem; color: var(--text-muted);
    background: rgba(74,144,217,.08);
    border: 1px solid var(--border);
    border-radius: 20px; padding: 4px 12px;
}
.nav-upgrade-link { color: var(--primary-light); font-weight: 600; text-decoration: none; transition: var(--transition); }
.nav-upgrade-link:hover { color: var(--text-primary); }
.nav-plan-premium {
    display: none; align-items: center; gap: 6px;
    font-size: 0.75rem; font-weight: 700; color: var(--premium-gold);
    background: rgba(255,215,0,.08); border: 1px solid rgba(255,215,0,.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: 3px 9px; border-radius: 7px; border: none;
    background: transparent; color: var(--text-muted);
    cursor: pointer; transition: var(--transition);
    font-family: 'Poppins', sans-serif;
}
.fs-btn:nth-child(1) { font-size: 0.75rem; }
.fs-btn:nth-child(2) { font-size: 0.9375rem; }
.fs-btn:nth-child(3) { font-size: 1.125rem; }
.fs-btn.active, .fs-btn:hover { background: var(--primary-glow); color: var(--primary-light); }

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

/* Theme panel flotante */
.theme-panel-float {
    display: none; flex-direction: column; gap: 4px;
    position: fixed; top: 68px; right: 16px; z-index: 300;
    background: var(--bg-dark); border: 1px solid var(--border);
    border-radius: 16px; padding: 10px;
    box-shadow: var(--shadow-lg); min-width: 160px;
}
.tpf-opt {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 12px; border-radius: 10px; border: none;
    background: transparent; color: var(--text-secondary);
    cursor: pointer; font-size: 0.8125rem;
    font-family: 'Poppins', sans-serif;
    transition: var(--transition); text-align: left;
}
.tpf-opt:hover, .tpf-opt.active { background: var(--primary-glow); color: var(--primary-light); }
.tpf-dot { width: 14px; height: 14px; border-radius: 50%; flex-shrink: 0; }

/* Usuario */
.un-user-chip {
    display: flex; align-items: center; gap: 8px;
    background: var(--bg-dark); border: 1px solid var(--border);
    border-radius: 20px; padding: 4px 12px 4px 4px;
    text-decoration: none; transition: var(--transition);
    font-size: 0.8125rem; color: var(--text-secondary);
}
.un-user-chip:hover { border-color: var(--border-hover); color: var(--primary-light); }
.un-avatar {
    width: 26px; height: 26px; border-radius: 50%;
    background: var(--primary-glow); border: 1px solid var(--border-hover);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.75rem; font-weight: 700; color: var(--primary-light);
}
.un-logout {
    width: 34px; height: 34px; border-radius: 10px;
    background: transparent; border: 1px solid var(--border);
    color: var(--text-muted); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.875rem; transition: var(--transition);
}
.un-logout:hover { background: rgba(229,57,53,.08); color: #ff7070; border-color: rgba(229,57,53,.3); }

/* ══════════════════════════════════════════════
   DATA-FONT
══════════════════════════════════════════════ */
[data-font="chica"]  { --un-font-en: 1.25rem;  --un-font-es: 1.1rem;   }
[data-font="mediana"]{ --un-font-en: 1.5rem;   --un-font-es: 1.25rem;  }
[data-font="grande"] { --un-font-en: 1.75rem;  --un-font-es: 1.5rem;   }

/* ══════════════════════════════════════════════
   LAYOUT
══════════════════════════════════════════════ */
.un-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: calc(100vh - 60px);
    max-width: 1400px; margin: 0 auto;
}

/* ── SIDEBAR ── */
.un-sidebar {
    background: var(--bg-dark);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    overflow: hidden;
    position: sticky; top: 60px;
    height: calc(100vh - 60px);
}
.un-sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.un-sidebar-title {
    display: flex; align-items: center; gap: 8px;
    font-size: 0.9375rem; font-weight: 700;
    color: var(--text-primary); margin-bottom: 12px;
}
.un-sidebar-title i { color: var(--primary-light); }
.un-total-badge {
    margin-left: auto; font-size: 0.6875rem; font-weight: 600;
    color: var(--primary-light); background: var(--primary-glow);
    border: 1px solid var(--border-hover);
    border-radius: 20px; padding: 2px 8px;
}
.un-search-wrap {
    display: flex; align-items: center; gap: 8px;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: 10px; padding: 8px 12px; transition: var(--transition);
}
.un-search-wrap:focus-within { border-color: var(--border-hover); }
.un-search-wrap i { color: var(--text-muted); font-size: 0.8125rem; flex-shrink: 0; }
.un-search-wrap input {
    flex: 1; border: none; background: transparent;
    color: var(--text-primary); font-size: 0.875rem;
    font-family: 'Poppins', sans-serif; outline: none;
}
.un-search-wrap input::placeholder { color: var(--text-muted); }

.un-unit-list {
    flex: 1; overflow-y: auto; padding: 8px;
}
.un-unit-list::-webkit-scrollbar { width: 4px; }
.un-unit-list::-webkit-scrollbar-track { background: transparent; }
.un-unit-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.un-loading {
    display: flex; flex-direction: column; align-items: center;
    gap: 12px; padding: 40px 20px;
    color: var(--text-muted); font-size: 0.875rem;
}

/* Item sidebar */
.un-unit-item {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 10px; border-radius: 10px;
    cursor: pointer; transition: var(--transition);
    border: 1px solid transparent; position: relative;
}
.un-unit-item:hover  { background: var(--primary-glow); border-color: var(--border); }
.un-unit-item.active { background: var(--primary-glow); border-color: var(--border-hover); }
.un-unit-item.locked { opacity: 0.45; cursor: default; }
.un-unit-item.locked:hover { background: transparent; border-color: transparent; }

.un-ui-num {
    font-size: 0.6875rem; font-weight: 600;
    color: var(--text-muted); min-width: 28px;
    text-align: right; flex-shrink: 0;
}
.un-ui-body { flex: 1; min-width: 0; }
.un-ui-title {
    font-size: 0.8125rem; font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.un-ui-lock {
    font-size: 0.6875rem; color: var(--text-muted); flex-shrink: 0;
}

/* Resume banner */
.un-resume-banner {
    display: flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg,rgba(74,144,217,.15),rgba(74,144,217,.08));
    border: 1px solid rgba(74,144,217,.35);
    border-radius: 10px; margin: 0 14px 10px;
    padding: 9px 12px; font-size: 0.8rem;
    color: var(--primary-light);
    animation: unBannerIn 0.4s ease;
}
.un-resume-banner i { color: var(--primary); font-size: 0.875rem; flex-shrink: 0; }
.un-resume-banner span {
    flex: 1; min-width: 0;
    overflow: hidden; text-overflow: ellipsis;
    white-space: nowrap; font-weight: 500;
}
.un-resume-btn {
    background: var(--primary); color: #fff; border: none;
    border-radius: 6px; padding: 4px 11px;
    font-size: 0.775rem; font-weight: 600; cursor: pointer;
    flex-shrink: 0; font-family: 'Poppins', sans-serif;
    transition: opacity 0.2s;
}
.un-resume-btn:hover { opacity: 0.85; }
@keyframes unBannerIn {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── MAIN ── */
.un-main {
    padding: 24px; display: flex;
    flex-direction: column; gap: 18px; overflow-y: auto;
}

/* Header de unidad */
.un-unit-header {
    display: flex; align-items: flex-start;
    justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.un-unit-title-block {
    display: flex; align-items: flex-start; gap: 12px; min-width: 0;
}
.un-unit-num-badge {
    flex-shrink: 0; font-size: 0.75rem; font-weight: 800;
    color: var(--primary-light); background: var(--primary-glow);
    border: 1px solid var(--border-hover);
    border-radius: 10px; padding: 4px 10px;
    margin-top: 4px; letter-spacing: 0.04em;
}
.un-unit-name {
    font-size: 1.5rem; font-weight: 800;
    color: var(--text-primary); line-height: 1.25;
}
.un-unit-pills { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.un-stat-pills { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.un-stat-pill {
    font-size: 0.75rem; padding: 4px 12px; border-radius: 20px;
    border: 1px solid var(--border); color: var(--text-secondary);
    background: var(--bg-dark); font-weight: 500;
}
.un-stat-pill.accent { background: var(--primary-glow); color: var(--primary-light); border-color: var(--border-hover); }
.un-stat-pill.ok  { color: #69db7c; border-color: rgba(76,175,80,.3); background: rgba(76,175,80,.06); }
.un-stat-pill.err { color: #ff7070; border-color: rgba(229,57,53,.3); background: rgba(229,57,53,.06); }
.un-pill-unit {
    background: rgba(74,144,217,.12) !important;
    border: 1px solid rgba(74,144,217,.3) !important;
    color: var(--primary-light) !important;
    font-size: 0.72rem !important;
    display: flex; align-items: center; gap: 5px;
}
.un-pill-unit i { color: var(--primary); font-size: 0.7rem; }

/* Botón hamburguesa — solo móvil */
.un-btn-cambiar { display: none; }

/* ══════════════════════════════════════════════
   PANEL EXPLICACIÓN
══════════════════════════════════════════════ */
.un-explain-panel {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.un-explain-header {
    display: flex; align-items: center;
    justify-content: space-between;
    padding: 14px 20px; cursor: pointer;
    transition: var(--transition);
}
.un-explain-header:hover { background: var(--primary-glow); }
.un-explain-title {
    display: flex; align-items: center; gap: 10px;
    font-size: 0.9rem; font-weight: 700;
    color: var(--text-primary);
}
.un-explain-title i { color: var(--primary-light); font-size: 0.875rem; }
.un-explain-toggle-btns {
    display: flex; align-items: center; gap: 8px;
}
.un-explain-lang {
    font-size: 0.7rem; font-weight: 700; padding: 3px 10px;
    border-radius: 8px; border: 1px solid var(--border);
    background: transparent; color: var(--text-muted);
    cursor: pointer; font-family: 'Poppins', sans-serif;
    transition: var(--transition);
}
.un-explain-lang.active {
    background: var(--primary-glow); color: var(--primary-light);
    border-color: var(--border-hover);
}
.un-explain-lang:hover:not(.active) { border-color: var(--border-hover); color: var(--text-secondary); }
.un-explain-chevron {
    color: var(--text-muted); font-size: 0.75rem;
    transition: transform 0.3s ease; margin-left: 4px;
}
.un-explain-panel.open .un-explain-chevron { transform: rotate(180deg); }

.un-explain-body {
    max-height: 0; overflow: hidden;
    transition: max-height 0.4s ease;
    border-top: 0px solid var(--border);
}
.un-explain-panel.open .un-explain-body {
    max-height: 600px;
    border-top: 1px solid var(--border);
}
.un-explain-text {
    margin: 0; padding: 20px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.875rem; line-height: 1.75;
    color: var(--text-secondary);
    white-space: pre-wrap; word-break: break-word;
    overflow-y: auto; max-height: 500px;
}
.un-explain-text::-webkit-scrollbar { width: 4px; }
.un-explain-text::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ── PANEL DE CONTROLES ── */
.un-controls-panel {
    background: var(--bg-dark); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 16px 20px;
    display: flex; flex-direction: column; gap: 12px;
}
.un-controls-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.un-ctrl-label { font-size: 0.75rem; color: var(--text-muted); white-space: nowrap; flex-shrink: 0; }

.un-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.un-chip {
    font-size: 0.8125rem; padding: 5px 14px; border-radius: 20px;
    border: 1px solid var(--border); color: var(--text-secondary);
    background: transparent; cursor: pointer; transition: var(--transition);
    font-family: 'Poppins', sans-serif; font-weight: 500;
}
.un-chip:hover { border-color: var(--border-hover); color: var(--text-primary); }
.un-chip.active { background: var(--primary-glow); color: var(--primary-light); border-color: var(--border-hover); }

/* Rango Del / Al */
.un-rango-row { gap: 0; }
.un-rango-group {
    display: flex; align-items: center;
    background: var(--bg-darker); border: 1px solid var(--border-hover);
    border-radius: 16px; padding: 6px 16px;
    width: 100%; justify-content: center; gap: 10px;
}
.un-rango-label {
    font-size: 0.7rem; font-weight: 700; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 0.08em; white-space: nowrap; flex-shrink: 0;
}
.un-rango-sep { font-size: 1rem; font-weight: 700; color: var(--border-hover); flex-shrink: 0; }
.un-rango-group select {
    flex: 1; font-size: 0.9rem; font-weight: 700;
    padding: 6px 10px; border-radius: 10px;
    border: 1px solid var(--border-hover);
    background: var(--primary-glow); color: var(--primary-light);
    font-family: 'Poppins', sans-serif;
    cursor: pointer; transition: var(--transition); outline: none;
    text-align: center; min-width: 70px;
}
.un-rango-group select:hover,
.un-rango-group select:focus { border-color: var(--primary-light); background: rgba(74,144,217,.18); }

.un-controls-row-top { justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }

.un-current-widget {
    display: flex; flex-direction: column; align-items: flex-end; gap: 2px;
    background: rgba(74,144,217,.07); border: 1px solid rgba(74,144,217,.25);
    border-radius: 12px; padding: 8px 16px;
    min-width: 180px; max-width: 380px; flex-shrink: 0;
}
.un-cw-label {
    font-size: 0.68rem; font-weight: 600; color: var(--primary-light);
    letter-spacing: 0.08em; text-transform: uppercase;
    display: flex; align-items: center; gap: 5px; opacity: 0.8;
}
.un-cw-label i { font-size: 0.6rem; }
.un-cw-unit {
    font-size: 0.875rem; font-weight: 700;
    color: var(--text-primary); line-height: 1.3; text-align: right;
    max-width: 340px;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
}

.un-audio-row { border-top: 1px solid var(--border); padding-top: 10px; flex-wrap: nowrap; gap: 8px; overflow-x: auto; }
.un-ctrl-group { display: flex; align-items: center; gap: 6px; }
.un-ctrl-group select {
    font-size: 0.8125rem; padding: 5px 10px; border-radius: 10px;
    border: 1px solid var(--border); background: var(--bg-input);
    color: var(--text-primary); font-family: 'Poppins', sans-serif;
    cursor: pointer; transition: var(--transition);
}
.un-ctrl-group select:hover { border-color: var(--border-hover); }
.un-ctrl-sep { width: 1px; height: 24px; background: var(--border); flex-shrink: 0; }

.un-mode-toggle {
    display: flex; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: 10px;
    overflow: hidden; margin-left: auto;
}
.un-mode-opt {
    font-size: 0.775rem; padding: 6px 11px; cursor: pointer;
    color: var(--text-muted); border: none; background: transparent;
    transition: var(--transition); font-family: 'Poppins', sans-serif;
    font-weight: 500; display: flex; align-items: center; gap: 5px; white-space: nowrap;
}
.un-mode-opt:hover { color: var(--text-secondary); }
.un-mode-opt.active { background: var(--primary-glow); color: var(--primary-light); }
.un-mode-mic.active { background: rgba(239,68,68,.15) !important; color: #f87171 !important; }

/* ── BARRA DE PROGRESO ── */
.un-progress-wrap { display: flex; align-items: center; gap: 12px; }
.un-prog-bar { flex: 1; height: 4px; background: var(--border); border-radius: 4px; overflow: hidden; }
.un-prog-fill { height: 100%; background: var(--primary); border-radius: 4px; transition: width 0.4s ease; width: 0%; }
.un-prog-label { font-size: 0.75rem; color: var(--text-muted); white-space: nowrap; font-weight: 600; }

/* ══════════════════════════════════════════════
   CARD STACK
══════════════════════════════════════════════ */
.un-card-area { display: flex; flex-direction: column; gap: 16px; }
.un-card-stack { position: relative; min-height: 220px; }
.un-card-bg {
    position: absolute; left: 50%; transform: translateX(-50%);
    width: calc(100% - 32px); background: var(--bg-dark);
    border: 1px solid var(--border); border-radius: var(--radius-lg);
    pointer-events: none;
}
.un-card-bg1 { bottom: -7px;  height: 100%; z-index: 1; }
.un-card-bg2 { bottom: -14px; width: calc(100% - 56px); height: 100%; z-index: 0; opacity: .5; }

.un-main-card {
    position: relative; z-index: 2;
    background: var(--bg-dark); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 20px 24px;
    display: flex; flex-direction: column; gap: 14px;
    transition: transform 0.12s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 24px rgba(0,0,0,.3);
}
.un-main-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-primary); }
.un-main-card.flip  { animation: unFlip 0.32s ease; }
@keyframes unFlip {
    0%   { opacity: 1; transform: scale(1); }
    45%  { opacity: 0; transform: scale(0.96) translateY(-4px); }
    55%  { opacity: 0; transform: scale(0.96) translateY(-4px); }
    100% { opacity: 1; transform: scale(1); }
}

/* Banner unidad en card */
.un-card-unit-banner {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 16px 10px;
    border-bottom: 1px solid rgba(255,255,255,.07);
    margin-bottom: 2px;
    background: rgba(74,144,217,.05);
    border-radius: 6px 6px 0 0;
}
.un-card-unit-num  { font-size: 0.8rem; font-weight: 800; color: var(--primary-light); letter-spacing: 0.06em; }
.un-card-unit-sep  { color: rgba(255,255,255,.2); font-size: 1rem; font-weight: 300; }
.un-card-unit-name { font-size: 0.8rem; color: rgba(255,255,255,.45); font-style: italic; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.un-card-top { display: flex; align-items: center; justify-content: space-between; }
.un-card-num {
    font-size: 0.6875rem; text-transform: uppercase;
    letter-spacing: 0.8px; color: var(--text-muted); font-weight: 600;
}
.un-card-counter { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; }
.un-card-body { display: flex; flex-direction: column; gap: 12px; }

.un-card-en {
    font-size: var(--un-font-en, 1.5rem);
    font-weight: 700; color: var(--text-primary); line-height: 1.5;
}
.un-card-en-ref {
    font-size: var(--un-font-en, 1.5rem);
    font-weight: 700; color: var(--primary-light); line-height: 1.5;
    background: var(--primary-glow);
    border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
    border-radius: 8px; padding: 8px 12px;
}
.un-card-es {
    font-size: var(--un-font-es, 1.25rem);
    color: var(--text-secondary); line-height: 1.5; font-weight: 500;
}
.un-card-animo {
    font-size: 0.9375rem; font-style: italic;
    color: var(--text-secondary); line-height: 1.5;
}
.un-card-divider { height: 1px; background: var(--border); border-radius: 1px; }

/* Escritura */
.un-escritura-area {
    display: flex; flex-direction: column; gap: 8px;
    border-top: 1px solid var(--border); padding-top: 12px;
}
.un-esc-input {
    width: 100%; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: 12px;
    padding: 10px 14px; font-size: 0.9375rem;
    font-family: 'Poppins', sans-serif; color: var(--text-primary);
    resize: none; outline: none; transition: var(--transition); line-height: 1.5;
}
.un-esc-input:focus  { border-color: var(--border-hover); background: rgba(74,144,217,.04); }
.un-esc-input.correct{ border-color: rgba(76,175,80,.5);  background: rgba(76,175,80,.06); }
.un-esc-input.wrong  { border-color: rgba(229,57,53,.4);  background: rgba(229,57,53,.05); }
.un-esc-input:disabled{ opacity: 0.8; cursor: default; }
.un-esc-feedback { font-size: 0.8125rem; min-height: 20px; color: var(--text-muted); font-weight: 500; transition: var(--transition); }
.un-esc-feedback.show-correct { color: #69db7c; animation: fbIn .2s ease; }
.un-esc-feedback.show-wrong   { color: #ff8080; animation: fbIn .2s ease; }
@keyframes fbIn { from { opacity:0; transform:translateY(4px); } to { opacity:1; transform:translateY(0); } }

/* Mic */
.un-mic-area { display: flex; flex-direction: column; align-items: center; gap: 14px; padding-top: 4px; border-top: 1px solid var(--border); }
.un-mic-countdown {
    display: flex; align-items: center; justify-content: center;
    width: 52px; height: 52px; border-radius: 50%;
    border: 3px solid var(--primary); background: var(--primary-glow);
}
.un-mic-countdown span { font-size: 1.6rem; font-weight: 800; color: var(--primary-light); line-height: 1; font-variant-numeric: tabular-nums; }
.un-mic-btn {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 8px; width: 90px; height: 90px; border-radius: 50%;
    border: 2px solid var(--border); background: var(--bg-input);
    color: var(--text-secondary); cursor: pointer;
    font-family: 'Poppins', sans-serif; font-size: 0.7rem; font-weight: 600;
    transition: all 0.2s ease; flex-shrink: 0;
}
.un-mic-btn i { font-size: 1.6rem; transition: color 0.2s; }
.un-mic-btn:hover { border-color: var(--primary); color: var(--primary-light); background: var(--primary-glow); }
.un-mic-btn.listening { border-color: #ef4444; color: #ef4444; background: rgba(239,68,68,.1); animation: micPulse 1.2s ease-in-out infinite; }
@keyframes micPulse { 0%,100%{box-shadow:0 0 0 0 rgba(239,68,68,.4);} 50%{box-shadow:0 0 0 14px rgba(239,68,68,0);} }
.un-mic-transcript { font-size: 0.9375rem; color: var(--text-secondary); font-style: italic; text-align: center; min-height: 1.4em; line-height: 1.4; }

/* ── BOTONES NAVEGACIÓN ── */
.un-nav-btns { display: flex; gap: 8px; align-items: center; }
.un-btn-nav {
    flex: 1; padding: 10px 16px; border: 1px solid var(--border);
    border-radius: var(--radius-md); background: var(--bg-dark);
    color: var(--text-primary); font-size: 0.875rem;
    font-family: 'Poppins', sans-serif; font-weight: 500; cursor: pointer;
    transition: var(--transition); display: flex; align-items: center; justify-content: center; gap: 6px;
}
.un-btn-nav:hover  { background: var(--primary-glow); border-color: var(--border-hover); }
.un-btn-nav:active { transform: scale(0.98); }
.un-btn-primary { flex: 2; background: var(--primary-glow); border-color: var(--border-hover); color: var(--primary-light); }
.un-btn-primary:hover { background: rgba(74,144,217,.2); }
.un-btn-auto { flex: 1; }
.un-btn-auto.playing   { background: rgba(76,175,80,.1); border-color: rgba(76,175,80,.3); color: #69db7c; }
.un-btn-reset { flex: 0; width: 44px; padding: 10px; color: var(--text-muted); }
.un-btn-reset:hover  { background: rgba(255,152,0,.08); border-color: rgba(255,152,0,.3); color: #FFB74D; }
.un-btn-reset i { transition: transform 0.4s ease; }
.un-btn-reset:hover i { transform: rotate(-180deg); }
.un-btn-audio { flex: 0; width: 44px; padding: 10px; }

/* Auto-Sig grande fila 2 */
.un-nav-btns-2 { display: flex; }
.un-btn-autosig-big {
    flex: 1; width: 100%; padding: 12px 20px;
    border: 1px solid var(--border); border-radius: var(--radius-md);
    background: var(--bg-dark); color: var(--text-primary);
    font-size: 1rem; font-family: 'Poppins', sans-serif; font-weight: 700;
    cursor: pointer; transition: var(--transition);
    display: flex; align-items: center; justify-content: center; gap: 8px;
}
.un-btn-autosig-big:hover  { background: var(--primary-glow); border-color: var(--border-hover); color: var(--primary-light); }
.un-btn-autosig-big:active { transform: scale(0.98); }
.un-btn-autosig-big.playing { background: rgba(76,175,80,.1); border-color: rgba(76,175,80,.3); color: #69db7c; }

/* ── EMPTY STATE ── */
.un-empty-state {
    display: flex; flex-direction: column; align-items: center;
    justify-content: center; gap: 16px; padding: 80px 24px; text-align: center;
}
.un-empty-icon {
    width: 80px; height: 80px; border-radius: 50%;
    background: var(--primary-glow); border: 1px solid var(--border-hover);
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem; color: var(--primary-light);
}
.un-empty-state h2 { font-size: 1.25rem; color: var(--text-primary); }
.un-empty-state p  { font-size: 0.9375rem; color: var(--text-muted); max-width: 360px; line-height: 1.6; }

/* ══════════════════════════════════════════════
   PREMIUM OVERLAY
══════════════════════════════════════════════ */
.un-premium-overlay {
    display: none; position: fixed; inset: 0; z-index: 500;
    background: rgba(9,14,22,.85); backdrop-filter: blur(6px);
    align-items: center; justify-content: center;
}
.un-premium-overlay.show { display: flex; }
.un-premium-modal {
    background: var(--bg-dark); border: 1px solid rgba(255,215,0,.2);
    border-radius: var(--radius-xl); padding: 40px 36px;
    max-width: 420px; width: 90%; text-align: center;
    display: flex; flex-direction: column; gap: 18px;
    box-shadow: 0 24px 80px rgba(0,0,0,.6);
}
.un-premium-icon {
    width: 72px; height: 72px; border-radius: 50%;
    background: rgba(255,215,0,.08); border: 1px solid rgba(255,215,0,.2);
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem; color: var(--premium-gold); margin: 0 auto;
}
.un-premium-modal h2 { font-size: 1.5rem; color: var(--text-primary); }
.un-premium-modal p  { font-size: 0.9375rem; color: var(--text-secondary); line-height: 1.6; }
.un-premium-modal strong { color: var(--premium-gold); }
.un-premium-features {
    display: flex; flex-direction: column; gap: 8px; text-align: left;
    background: rgba(74,144,217,.04); border: 1px solid var(--border);
    border-radius: var(--radius-md); padding: 14px 18px;
}
.un-pf-item { font-size: 0.875rem; color: var(--text-secondary); display: flex; align-items: center; gap: 10px; }
.un-pf-item i { color: var(--primary-light); font-size: 0.75rem; flex-shrink: 0; }
.un-btn-premium {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    padding: 14px 28px; background: linear-gradient(135deg,#FFD700,#FFA500);
    color: #1a1a00; font-weight: 700; font-size: 1rem;
    border-radius: var(--radius-md); text-decoration: none;
    transition: var(--transition); border: none; cursor: pointer;
    font-family: 'Poppins', sans-serif;
}
.un-btn-premium:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,215,0,.3); }
.un-btn-back {
    background: transparent; border: 1px solid var(--border);
    border-radius: var(--radius-md); color: var(--text-muted);
    font-size: 0.875rem; padding: 10px; cursor: pointer;
    font-family: 'Poppins', sans-serif; transition: var(--transition);
}
.un-btn-back:hover { color: var(--text-secondary); border-color: var(--border-hover); }

/* ══════════════════════════════════════════════
   RESPONSIVE — 900px
══════════════════════════════════════════════ */
@media (max-width: 900px) {
    .un-layout { grid-template-columns: 1fr; }
    .un-sidebar { display: none; }
    .un-main { padding: 16px; }
    .un-unit-name { font-size: 1.2rem; }
    .un-breadcrumb { display: none; }
    .un-nav-plan  { display: none !important; }
    #navUser      { display: none; }

    /* Ocultar pills originales en móvil */
    .un-unit-pills { display: none !important; }

    /* Contenedor nav móvil */
    .un-nav-mobile-stats {
        display: flex !important;
        align-items: center;
        gap: 6px;
    }
    .un-nav-pill-idx {
        font-size: 0.75rem;
        padding: 4px 10px;
        border-radius: 20px;
        background: var(--primary-glow);
        border: 1px solid var(--border-hover);
        color: var(--primary-light);
        font-weight: 700;
        white-space: nowrap;
    }
    .un-btn-cambiar-nav {
        display: flex; align-items: center; justify-content: center;
        width: 34px; height: 34px; 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);
    }
    .un-btn-cambiar-nav:hover { border-color: var(--border-hover); background: rgba(74,144,217,.18); }
    .un-current-widget { align-items: flex-start; max-width: 100%; width: 100%; }
}

/* Ocultar stats nav en desktop */
@media (min-width: 901px) {
    .un-nav-mobile-stats { display: none !important; }
    .un-btn-cambiar { display: none; }
}

/* ══════════════════════════════════════════════
   FAB — solo ≤900px
══════════════════════════════════════════════ */
.un-fab-units { display: none; }

@media (max-width: 900px) {
    .un-fab-units {
        display: flex; align-items: center; gap: 8px;
        position: fixed; bottom: 24px; left: 50%;
        transform: translateX(-50%); z-index: 300;
        background: var(--primary, #4A90D9); color: #fff;
        border: none; border-radius: 50px; padding: 14px 24px;
        font-family: 'Poppins', sans-serif;
        font-size: 0.9375rem; font-weight: 700; cursor: pointer;
        box-shadow: 0 6px 28px rgba(74,144,217,.55);
        transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
        white-space: nowrap;
    }
    .un-fab-units:hover { transform: translateX(-50%) translateY(-2px); box-shadow: 0 10px 36px rgba(74,144,217,.65); }
    .un-fab-units i { font-size: 1rem; }
    .un-fab-units.hidden { opacity: 0; pointer-events: none; transform: translateX(-50%) translateY(12px); }
    .un-fab-units.un-fab-gone { display: none !important; }
}
.un-fab-badge {
    background: rgba(255,255,255,.22); border-radius: 20px;
    padding: 1px 8px; font-size: 0.75rem; font-weight: 600;
}

/* ══════════════════════════════════════════════
   BOTTOM SHEET
══════════════════════════════════════════════ */
.un-sheet-backdrop {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,.6); z-index: 400;
    backdrop-filter: blur(3px); opacity: 0; transition: opacity .28s ease;
}
.un-sheet-backdrop.active { opacity: 1; }
.un-bottom-sheet {
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 401;
    background: var(--bg-dark, #1a2332);
    border-radius: 22px 22px 0 0; border-top: 1px solid var(--border);
    display: flex; flex-direction: column; max-height: 88vh;
    transform: translateY(100%);
    transition: transform .32s cubic-bezier(.32,.72,0,1); overflow: hidden;
}
.un-bottom-sheet.active { transform: translateY(0); }
.un-sheet-handle {
    width: 44px; height: 5px; background: rgba(255,255,255,.18);
    border-radius: 10px; margin: 12px auto 8px; flex-shrink: 0;
}
.un-sheet-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 4px 18px 14px; flex-shrink: 0; border-bottom: 1px solid var(--border);
}
.un-sheet-title {
    display: flex; align-items: center; gap: 8px;
    font-size: 1.125rem; font-weight: 700; color: var(--text-primary);
}
.un-sheet-title i { color: var(--primary-light); font-size: 1rem; }
.un-sheet-close {
    background: rgba(255,255,255,.07); border: 1px solid var(--border);
    color: var(--text-muted); border-radius: 50%;
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; font-size: 0.875rem; transition: var(--transition);
}
.un-sheet-close:hover { background: rgba(255,255,255,.12); color: var(--text-primary); }
.un-sheet-search { padding: 12px 16px 10px; flex-shrink: 0; }
.un-sheet-resume { margin: 0 16px 8px !important; }
.un-sheet-list { flex: 1; overflow-y: auto; padding: 4px 8px 32px; }
.un-sheet-list .un-unit-item { padding: 13px 14px; border-radius: 12px; margin-bottom: 4px; }
.un-sheet-list .un-ui-title { font-size: 0.9rem; white-space: normal; }

/* ══════════════════════════════════════════════
   RESPONSIVE — 600px (nav 2 filas)
══════════════════════════════════════════════ */
@media (max-width: 600px) {
    .un-nav-inner { padding: 8px 12px; height: auto; flex-wrap: wrap; gap: 4px; }
    .un-nav-left  { width: 100%; order: 1; }
    .un-logo { font-size: 0.875rem; }
    .un-breadcrumb { display: none; }
    .un-nav-right { width: 100%; order: 2; justify-content: flex-end; gap: 7px; }
    .fs-btn { padding: 2px 7px; }

    .un-main { padding: 12px; gap: 14px; }
    .un-controls-panel { padding: 12px; }
    .un-main-card { padding: 16px; }
    .un-stat-pills { gap: 6px; }
    .un-pill-unit { display: none; }

    .un-nav-btns { gap: 6px; flex-wrap: wrap; }
    #btnPrev    { flex: 1; order: 1; }
    #btnNext    { flex: 2; order: 2; }
    #btnAuto    { flex: 1; order: 3; }
    #btnAutoSig { flex: 1; order: 4; font-size: 0.75rem; padding: 9px 6px; }
    #btnReset   { order: 5; }
    #btnAudio   { order: 6; }
    .un-btn-nav { padding: 9px 10px; font-size: 0.8125rem; }

    .un-resume-banner { margin: 0 10px 8px; padding: 8px 10px; font-size: 0.75rem; }
    .un-unit-name { font-size: 1.05rem; }
    .un-card-unit-banner { padding: 6px 12px 8px; }
    .un-explain-header { padding: 12px 14px; }
    .un-explain-text { padding: 14px; font-size: 0.8125rem; }
}

@media (max-width: 380px) {
    .un-logo { font-size: 0.8125rem; }
}