/* ============================================
   MUUU APP – ESTILOS PRINCIPALES
   Universidad del Magdalena · 2025
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800;900&family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* ============================================
   VARIABLES GLOBALES (PALETA MUUU)
   ============================================ */
:root {
  /* MORADO – ROL ESTUDIANTE */
  --muuu-purple-primary: #9B7EC7;
  --muuu-purple-dark:    #7952B3;
  --muuu-purple-vibrant: #8A2BE2;
  --muuu-purple-light:   #B8A4D9;
  --muuu-purple-pale:    #E6D5F0;
  --muuu-purple-soft:    #F3EBFF;

  /* AMARILLO – ROL DOCENTE */
  --muuu-yellow-primary: #FFD700;
  --muuu-yellow-bright:  #FFEB3B;
  --muuu-yellow-dark:    #FFC107;
  --muuu-yellow-light:   #FFF9C4;
  --muuu-yellow-pale:    #FFFDE7;

  /* ROSA – ACENTO */
  --muuu-pink-nose:  #DDA0DD;
  --muuu-pink-light: #F4E4F4;

  /* GRISES */
  --muuu-gray-uniform: #696969;
  --muuu-gray-dark:    #4A4A4A;
  --muuu-gray-medium:  #7D7D7D;
  --muuu-gray-light:   #CCCCCC;
  --muuu-gray-pale:    #F5F5F5;

  /* BLANCO / NEGRO */
  --muuu-white:      #FFFFFF;
  --muuu-black:      #000000;
  --muuu-black-soft: #1A1A1A;

  /* ESTADOS */
  --muuu-success: #10B981;
  --muuu-error:   #EF4444;
  --muuu-warning: #F59E0B;
  --muuu-info:    #3B82F6;

  /* FONDOS */
  --muuu-bg-student: #F3EBFF;
  --muuu-bg-teacher: #FFFDE7;

  /* TEXTOS */
  --texto-principal:   #1E293B;
  --texto-secundario:  #475569;

  /* TIPOGRAFÍAS */
  --font-primary:   'Montserrat', sans-serif;
  --font-tertiary:  'Poppins', sans-serif;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 14px;
  font-family: var(--font-primary);
}

body {
  background: #e8e0f5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
  background-image:
    radial-gradient(circle at 20% 20%, #d4c4f0 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, #f0e6c8 0%, transparent 50%);
}

/* ============================================
   PHONE FRAME
   ============================================ */
.phone-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.phone-frame {
  width: 375px;
  height: 780px;
  background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
  border-radius: 50px;
  padding: 14px;
  box-shadow:
    0 30px 80px rgba(0,0,0,.5),
    0 10px 30px rgba(0,0,0,.3),
    inset 0 0 0 2px rgba(255,255,255,.08),
    inset 0 2px 4px rgba(255,255,255,.15);
  position: relative;
}

/* Notch */
.phone-frame::before {
  content: '';
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 32px;
  background: #1a1a1a;
  border-radius: 0 0 18px 18px;
  z-index: 100;
}

/* Camera */
.phone-frame::after {
  content: '';
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: #2a2a2a;
  border-radius: 50%;
  z-index: 101;
  box-shadow: 0 0 0 2px #333;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--muuu-white);
  border-radius: 38px;
  overflow: hidden;
  position: relative;
}

/* ============================================
   SCREENS
   ============================================ */
.screen {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: none;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
}

.screen.active {
  display: flex;
  opacity: 1;
  animation: fadeIn .3s ease forwards;
}

.screen.slide-in-right { animation: slideInRight .35s cubic-bezier(.4,0,.2,1) forwards; }
.screen.slide-in-left  { animation: slideInLeft  .35s cubic-bezier(.4,0,.2,1) forwards; }

@keyframes fadeIn       { from { opacity:0 } to { opacity:1 } }
@keyframes slideInRight { from { opacity:0; transform:translateX(60px)  } to { opacity:1; transform:none } }
@keyframes slideInLeft  { from { opacity:0; transform:translateX(-60px) } to { opacity:1; transform:none } }

/* ============================================
   STATUS BAR
   ============================================ */
.status-bar {
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
  z-index: 10;
}

/* ============================================
   SPLASH
   ============================================ */
#screen-splash {
  background: linear-gradient(160deg, #f0e8ff 0%, #e8d5ff 50%, #f5f0ff 100%);
  align-items: center;
  justify-content: center;
}

.splash-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  animation: splashAnim .8s ease forwards;
}

@keyframes splashAnim {
  from { opacity:0; transform:scale(.85) translateY(20px) }
  to   { opacity:1; transform:none }
}

.splash-logo {
  width: 160px; height: 160px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(155,126,199,.45);
  background: #9B7EC7;
}

.splash-logo img {
  width: 100%; height: 100%;
  object-fit: cover;
}

/* Logo pequeño (login / rol) */
.logo-small {
  width: 90px; height: 90px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(155,126,199,.35);
  background: #9B7EC7;
  flex-shrink: 0;
}

.logo-small img { width:100%; height:100%; object-fit:cover; }

/* Logo inline (interfaces) */
.logo-inline {
  height: 56px;
  object-fit: contain;
  filter: drop-shadow(0 3px 8px rgba(0,0,0,.25));
}

.splash-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--texto-principal);
  text-align: center;
  line-height: 1.5;
}

.splash-progress-bar {
  width: 160px; height: 6px;
  background: rgba(155,126,199,.25);
  border-radius: 3px;
  overflow: hidden;
}

.splash-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--muuu-purple-primary), var(--muuu-purple-vibrant));
  border-radius: 3px;
  animation: loadProgress 2.2s ease forwards;
}

@keyframes loadProgress { from { width:0% } to { width:100% } }

.splash-footer {
  position: absolute;
  bottom: 24px;
  font-size: 11px;
  color: var(--muuu-gray-medium);
}

/* ============================================
   FORMS / INPUTS
   ============================================ */
.login-body, .role-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 28px;
  gap: 18px;
  overflow-y: auto;
}

.screen-title-main {
  font-size: 20px;
  font-weight: 700;
  color: var(--texto-principal);
  text-align: center;
}

.input-group { width:100%; display:flex; flex-direction:column; gap:12px; }

.input-field {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--muuu-white);
  border: 1.5px solid var(--muuu-purple-light);
  border-radius: 12px;
  padding: 13px 16px;
  font-family: var(--font-primary);
  font-size: 13px;
  color: var(--texto-secundario);
  transition: border-color .2s, box-shadow .2s;
  cursor: pointer;
}

.input-field:focus-within {
  border-color: var(--muuu-purple-primary);
  box-shadow: 0 0 0 3px rgba(155,126,199,.15);
}

.input-field input {
  border: none; outline: none;
  background: transparent;
  font-family: var(--font-primary);
  font-size: 13px;
  color: var(--texto-principal);
  flex: 1; width: 100%;
}

.input-field input::placeholder { color: var(--muuu-gray-medium); }
.input-icon { color: var(--muuu-purple-primary); font-size: 15px; flex-shrink:0; }

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--muuu-purple-primary), var(--muuu-purple-dark));
  color: white;
  border: none;
  border-radius: 14px;
  font-family: var(--font-primary);
  font-size: 14px; font-weight: 700;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  box-shadow: 0 4px 15px rgba(155,126,199,.4);
}

.btn-primary:hover  { transform:translateY(-1px); box-shadow:0 6px 20px rgba(155,126,199,.5); }
.btn-primary:active { transform:translateY(0); }

.btn-teacher-primary {
  background: linear-gradient(135deg, var(--muuu-yellow-dark), #e6a800);
  box-shadow: 0 4px 15px rgba(255,193,7,.4);
  color: var(--muuu-black-soft);
}

.link-text { font-size:12px; color:var(--texto-secundario); text-align:center; }
.link-text a, .link-purple { color:var(--muuu-purple-dark); font-weight:600; text-decoration:none; cursor:pointer; }
.link-text a:hover { text-decoration:underline; }

/* ============================================
   ROLE SELECTION
   ============================================ */
.role-question { font-size:17px; font-weight:700; color:var(--texto-principal); text-align:center; }

.role-card {
  width: 100%;
  display: flex; align-items: center; gap: 14px;
  background: var(--muuu-white);
  border: 2px solid transparent;
  border-radius: 16px;
  padding: 16px 18px;
  cursor: pointer;
  transition: all .25s;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
}

.role-card:hover { transform:translateY(-2px); box-shadow:0 6px 20px rgba(0,0,0,.12); }
.role-card.student       { border-color: var(--muuu-purple-light); }
.role-card.student:hover { border-color: var(--muuu-purple-primary); background:var(--muuu-purple-soft); }
.role-card.teacher       { border-color: #ffe082; }
.role-card.teacher:hover { border-color: var(--muuu-yellow-dark); background:var(--muuu-yellow-pale); }

.role-icon {
  width:44px; height:44px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  font-size:20px; flex-shrink:0;
}
.role-icon.student { background:var(--muuu-purple-soft); }
.role-icon.teacher { background:var(--muuu-yellow-light); }

.role-name         { font-size:15px; font-weight:700; color:var(--texto-principal); }
.role-name.student { color:var(--muuu-purple-dark); }
.role-name.teacher { color:#c17f00; }
.role-desc  { font-size:12px; color:var(--texto-secundario); margin-top:2px; }
.role-arrow { color:var(--muuu-gray-medium); font-size:16px; }
.role-footer { font-size:11px; color:var(--muuu-gray-medium); margin-top:auto; }

/* ============================================
   BACK BUTTON & HEADERS
   ============================================ */
.back-btn {
  background: none; border: none; cursor: pointer;
  color: var(--muuu-purple-primary);
  font-size: 18px; padding: 4px;
  display: flex; align-items: center; gap: 4px;
  font-family: var(--font-primary); font-weight: 500;
}
.back-btn.teacher-back { color: var(--muuu-yellow-dark); }

.app-header {
  padding: 0 18px; height: 52px;
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0; z-index: 10;
}
.app-header.purple { background:var(--muuu-purple-primary); color:white; }
.app-header.purple .back-btn { color:white; }
.app-header.yellow { background:var(--muuu-yellow-dark); color:var(--muuu-black-soft); }
.app-header.yellow .back-btn { color:var(--muuu-black-soft); }

.header-title { font-size:16px; font-weight:700; flex:1; text-align:center; }
.header-action { font-size:16px; cursor:pointer; }

/* ============================================
   STUDENT HOME
   ============================================ */
#screen-home-student { background:var(--muuu-bg-student); }

.home-student-top {
  background: var(--muuu-white);
  padding: 48px 18px 14px;
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0;
  border-bottom: 1px solid rgba(155,126,199,.15);
}

.home-user-info { display:flex; align-items:center; gap:10px; }

.avatar-circle {
  width:38px; height:38px; border-radius:50%;
  background:var(--muuu-purple-soft);
  border:2px solid var(--muuu-purple-primary);
  display:flex; align-items:center; justify-content:center;
  font-size:14px; font-weight:700; color:var(--muuu-purple-dark);
}
.avatar-circle.yellow {
  background:var(--muuu-yellow-light);
  border-color:var(--muuu-yellow-dark);
  color:#a07000;
}

.home-greeting { font-size:15px; font-weight:700; color:var(--texto-principal); }

.home-top-actions { display:flex; align-items:center; gap:14px; }

.streak-badge {
  display:flex; align-items:center; gap:4px;
  font-size:13px; font-weight:700; color:var(--texto-principal);
}

.notif-btn {
  width:30px; height:30px; border-radius:50%;
  background:var(--muuu-purple-soft);
  display:flex; align-items:center; justify-content:center;
  font-size:14px; cursor:pointer; position:relative;
}
.notif-dot {
  position:absolute; top:4px; right:4px;
  width:7px; height:7px;
  background:var(--muuu-error); border-radius:50%;
  border:1.5px solid white;
}

.home-student-scroll {
  flex:1; overflow-y:auto;
  padding:16px 16px 80px;
  scrollbar-width:none;
}
.home-student-scroll::-webkit-scrollbar { display:none; }

.home-ada-logo { display:flex; justify-content:center; margin-bottom:10px; }
.home-ada-img  { height:72px; object-fit:contain; filter:drop-shadow(0 4px 12px rgba(155,126,199,.3)); }

.section-question { font-size:16px; font-weight:700; color:var(--texto-principal); text-align:center; margin-bottom:16px; }

.home-grid { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:16px; }

.grid-card {
  background: linear-gradient(135deg, var(--muuu-purple-primary), var(--muuu-purple-dark));
  border-radius: 18px;
  padding: 18px 14px;
  display: flex; flex-direction: column;
  align-items: flex-start; gap: 8px;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  position: relative; overflow: hidden;
  min-height: 110px;
  box-shadow: 0 4px 15px rgba(155,126,199,.3);
}
.grid-card::before {
  content:''; position:absolute; top:-20px; right:-20px;
  width:80px; height:80px;
  background:rgba(255,255,255,.08); border-radius:50%;
}
.grid-card:hover  { transform:translateY(-3px) scale(1.02); box-shadow:0 8px 25px rgba(155,126,199,.4); }
.grid-card:active { transform:scale(.97); }
.grid-card.lighter { background:linear-gradient(135deg,#a98de0,#8a6cc7); }

.card-icon     { font-size:28px; }
.card-label    { color:white; font-size:14px; font-weight:700; line-height:1.2; }
.card-sublabel { color:rgba(255,255,255,.8); font-size:11px; }

.new-badge {
  position:absolute; top:10px; right:10px;
  background:var(--muuu-yellow-primary); color:var(--muuu-black-soft);
  font-size:9px; font-weight:800; padding:2px 7px; border-radius:8px;
}

.ranking-fab {
  width:64px; height:64px; border-radius:50%;
  background:linear-gradient(135deg, var(--muuu-yellow-primary), var(--muuu-yellow-dark));
  display:flex; align-items:center; justify-content:center;
  font-size:28px; margin:8px auto; cursor:pointer;
  box-shadow:0 4px 20px rgba(255,193,7,.5);
  transition:transform .2s;
}
.ranking-fab:hover { transform:scale(1.08); }

.progress-section { margin-top:4px; }
.progress-section-title {
  font-size:11px; font-weight:800; color:var(--texto-principal);
  text-transform:uppercase; letter-spacing:.5px; margin-bottom:8px;
}

.progress-item { background:var(--muuu-white); border-radius:12px; padding:12px 14px; margin-bottom:8px; }
.progress-label { display:flex; justify-content:space-between; font-size:12px; font-weight:600; color:var(--texto-principal); margin-bottom:6px; }

.progress-bar-bg  { height:6px; background:var(--muuu-gray-pale); border-radius:3px; overflow:hidden; }
.progress-bar-fill { height:100%; background:linear-gradient(90deg,var(--muuu-purple-primary),var(--muuu-purple-vibrant)); border-radius:3px; transition:width .8s ease; }

/* ============================================
   BOTTOM NAV
   ============================================ */
.bottom-nav {
  position:absolute; bottom:0; left:0; right:0;
  height:64px; background:var(--muuu-white);
  border-top:1px solid rgba(155,126,199,.15);
  display:flex; align-items:center; justify-content:space-around;
  padding:0 8px 8px;
  box-shadow:0 -4px 16px rgba(0,0,0,.06); z-index:20;
}
.bottom-nav.teacher-nav { border-top-color:rgba(255,193,7,.2); }

.nav-item {
  display:flex; flex-direction:column; align-items:center; gap:3px;
  cursor:pointer; padding:6px 16px; border-radius:12px; transition:background .2s;
}
.nav-item:hover        { background:var(--muuu-purple-soft); }
.nav-item.teacher-item:hover { background:var(--muuu-yellow-pale); }
.nav-icon  { font-size:20px; }
.nav-label { font-size:10px; font-weight:600; color:var(--muuu-gray-medium); }
.nav-item.active .nav-label              { color:var(--muuu-purple-primary); }
.nav-item.teacher-item.active .nav-label { color:var(--muuu-yellow-dark); }

/* ============================================
   APRENDE UN POCO
   ============================================ */
#screen-aprende { background:var(--muuu-bg-student); }

.screen-scroll { flex:1; overflow-y:auto; scrollbar-width:none; }
.screen-scroll::-webkit-scrollbar { display:none; }

.search-bar {
  margin:12px 16px;
  background:var(--muuu-white);
  border:1.5px solid var(--muuu-purple-light);
  border-radius:12px;
  display:flex; align-items:center; gap:8px;
  padding:11px 14px;
}
.search-bar input { border:none; outline:none; font-family:var(--font-primary); font-size:13px; color:var(--texto-principal); flex:1; background:transparent; }
.search-bar input::placeholder { color:var(--muuu-gray-medium); }

.filter-tabs { display:flex; gap:8px; padding:0 16px; margin-bottom:14px; overflow-x:auto; flex-wrap:nowrap; }
.filter-tabs::-webkit-scrollbar { display:none; }

.filter-tab {
  padding:7px 14px; border-radius:20px; font-size:12px; font-weight:600;
  cursor:pointer; border:1.5px solid var(--muuu-purple-light);
  background:var(--muuu-white); color:var(--texto-secundario);
  white-space:nowrap; transition:all .2s;
}
.filter-tab.active { background:var(--muuu-purple-primary); border-color:var(--muuu-purple-primary); color:white; }

.section-header {
  display:flex; align-items:center; gap:6px;
  padding:0 16px; margin-bottom:8px;
  font-size:11px; font-weight:800; color:var(--texto-principal);
  text-transform:uppercase; letter-spacing:.5px;
}

.content-card {
  margin:0 16px 10px; background:var(--muuu-white);
  border-radius:14px; padding:14px;
  display:flex; gap:12px; align-items:center;
  box-shadow:0 2px 8px rgba(0,0,0,.05); cursor:pointer; transition:transform .2s;
}
.content-card:hover { transform:translateY(-1px); }

.content-thumb { width:50px; height:50px; border-radius:12px; display:flex; align-items:center; justify-content:center; font-size:22px; flex-shrink:0; }
.content-info  { flex:1; }

.difficulty-badge { display:inline-block; font-size:10px; font-weight:700; padding:2px 8px; border-radius:8px; margin-bottom:4px; }
.diff-intermedio  { background:#fff3cd; color:#a07000; }
.diff-avanzado    { background:#ffe0e0; color:#c0392b; }
.diff-basico      { background:#d4edda; color:#155724; }

.content-title { font-size:13px; font-weight:700; color:var(--texto-principal); }
.content-meta  { font-size:11px; color:var(--muuu-gray-medium); margin-top:2px; }
.content-status { font-size:11px; font-weight:600; margin-top:4px; }
.status-unread  { color:var(--muuu-purple-primary); }

.progress-mini      { height:4px; background:var(--muuu-gray-pale); border-radius:2px; margin-top:6px; overflow:hidden; }
.progress-mini-fill { height:100%; background:var(--muuu-purple-primary); border-radius:2px; }
.aprende-padding    { padding-bottom:16px; }

/* ============================================
   PONTE A PRUEBA
   ============================================ */
#screen-prueba { background:var(--muuu-white); }

.prueba-header { background:var(--muuu-white); padding:48px 16px 10px; flex-shrink:0; }

.prueba-title-row { display:flex; align-items:center; justify-content:space-between; margin-bottom:10px; }
.prueba-title-text { font-size:16px; font-weight:700; flex:1; text-align:center; }
.lives-row         { display:flex; gap:4px; font-size:18px; }

.prueba-stats { display:flex; gap:8px; margin-bottom:10px; }
.stat-pill {
  display:flex; align-items:center; gap:5px;
  padding:5px 10px; border-radius:20px;
  font-size:12px; font-weight:700; flex:1; justify-content:center;
}
.stat-correct { background:#e8f9f1; color:var(--muuu-success); }
.stat-wrong   { background:#fde8e8; color:var(--muuu-error); }
.stat-skip    { background:var(--muuu-gray-pale); color:var(--muuu-gray-dark); }
.stat-time    { background:var(--muuu-purple-soft); color:var(--muuu-purple-dark); }

.prueba-progress-bar {
  display:flex; align-items:center; justify-content:space-between; gap:8px;
  padding:0 16px; font-size:11px; font-weight:600; color:var(--texto-secundario);
  margin-bottom:6px;
}
.prueba-bar-track { flex:1; height:6px; background:var(--muuu-gray-pale); border-radius:3px; overflow:hidden; }
.prueba-bar-fill  { height:100%; background:linear-gradient(90deg,var(--muuu-purple-primary),var(--muuu-purple-vibrant)); border-radius:3px; transition:width .5s ease; }

.prueba-scroll { flex:1; overflow-y:auto; padding:12px 16px 16px; scrollbar-width:none; }
.prueba-scroll::-webkit-scrollbar { display:none; }

.topic-tag { display:inline-block; background:var(--muuu-purple-soft); color:var(--muuu-purple-dark); font-size:11px; font-weight:700; padding:4px 12px; border-radius:10px; margin-bottom:10px; }
.question-label { font-size:14px; font-weight:700; color:var(--texto-principal); margin-bottom:12px; }

/* FLIP CARD */
.flip-card-container { perspective:1000px; margin-bottom:16px; cursor:pointer; }

.flip-card {
  width:100%; min-height:100px; position:relative;
  transform-style:preserve-3d;
  transition:transform .6s cubic-bezier(.4,0,.2,1);
}
.flip-card.flipped { transform:rotateY(180deg); }

.flip-card-front, .flip-card-back {
  position:absolute; top:0; left:0;
  width:100%; min-height:100px;
  backface-visibility:hidden; -webkit-backface-visibility:hidden;
  border-radius:16px; padding:18px;
  display:flex; align-items:center; justify-content:center;
}

.flip-card-front {
  background:var(--muuu-purple-soft);
  border:1.5px solid var(--muuu-purple-light);
  flex-direction:column; gap:8px; position:relative;
}
.flip-card-back {
  background:linear-gradient(135deg,var(--muuu-purple-primary),var(--muuu-purple-dark));
  transform:rotateY(180deg);
  flex-direction:column; gap:6px;
}

.nemotecnia-badge {
  position:absolute; top:-10px; right:10px;
  background:var(--muuu-purple-primary); color:white;
  font-size:11px; font-weight:700; padding:4px 12px; border-radius:20px;
  cursor:pointer; box-shadow:0 2px 8px rgba(155,126,199,.4); z-index:5;
}

.formula-display { font-size:24px; color:var(--muuu-purple-vibrant); text-align:center; padding:4px; }
.answer-label    { font-size:12px; font-weight:700; color:rgba(255,255,255,.7); text-transform:uppercase; letter-spacing:.5px; }
.answer-formula  { font-size:20px; color:white; text-align:center; }

.option-list { display:flex; flex-direction:column; gap:8px; }
.option-btn {
  display:flex; align-items:center; gap:12px;
  padding:13px 14px; background:var(--muuu-white);
  border:1.5px solid var(--muuu-purple-light); border-radius:12px;
  cursor:pointer; transition:all .2s;
  font-family:var(--font-primary); font-size:13px; font-weight:500;
  color:var(--texto-principal); width:100%; text-align:left;
}
.option-btn:hover:not(.selected):not(.correct):not(.wrong) { background:var(--muuu-purple-soft); border-color:var(--muuu-purple-primary); }
.option-btn.selected { background:var(--muuu-purple-soft); border-color:var(--muuu-purple-primary); }
.option-btn.correct  { background:#e8f9f1; border-color:var(--muuu-success); color:#0a7a52; }
.option-btn.wrong    { background:#fde8e8; border-color:var(--muuu-error);   color:#c0392b; }

.option-letter {
  width:28px; height:28px; border-radius:50%;
  background:var(--muuu-purple-pale);
  display:flex; align-items:center; justify-content:center;
  font-size:12px; font-weight:700; flex-shrink:0; color:var(--muuu-purple-dark);
}
.option-btn.correct .option-letter { background:var(--muuu-success); color:white; }
.option-btn.wrong   .option-letter { background:var(--muuu-error);   color:white; }
.option-check { margin-left:auto; font-size:16px; }

.verify-btn {
  margin-top:16px; width:100%; padding:14px;
  background:var(--muuu-gray-pale); color:var(--muuu-gray-medium);
  border:none; border-radius:14px;
  font-family:var(--font-primary); font-size:13px; font-weight:700;
  text-transform:uppercase; letter-spacing:1px; cursor:pointer; transition:all .2s;
}
.verify-btn.active {
  background:linear-gradient(135deg,var(--muuu-purple-primary),var(--muuu-purple-dark));
  color:white; box-shadow:0 4px 15px rgba(155,126,199,.4);
}

/* ============================================
   DESAFÍO
   ============================================ */
#screen-desafio { background:var(--muuu-bg-student); }

.desafio-header-bg {
  background:linear-gradient(135deg,var(--muuu-purple-primary),var(--muuu-purple-dark));
  padding:48px 20px 24px; flex-shrink:0;
}
.desafio-header-title-row { display:flex; align-items:center; justify-content:space-between; margin-bottom:4px; }
.desafio-h-title { font-size:16px; font-weight:700; color:white; }
.desafio-subtitle { text-align:center; font-size:11px; font-weight:700; color:rgba(255,255,255,.7); text-transform:uppercase; letter-spacing:1px; margin-bottom:14px; }

.vs-row    { display:flex; align-items:center; justify-content:center; gap:16px; }
.vs-player { display:flex; flex-direction:column; align-items:center; gap:6px; }
.vs-avatar {
  width:52px; height:52px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:18px; font-weight:700; color:var(--muuu-black-soft); background:#d4a870;
}
.vs-avatar.question {
  background:rgba(255,255,255,.2); border:2px dashed rgba(255,255,255,.5);
  font-size:22px; color:rgba(255,255,255,.7);
}
.vs-name  { font-size:11px; color:rgba(255,255,255,.85); font-weight:500; }
.vs-badge { width:36px; height:36px; border-radius:50%; background:var(--muuu-yellow-primary); display:flex; align-items:center; justify-content:center; font-size:13px; font-weight:800; color:var(--muuu-black-soft); }

.desafio-scroll { flex:1; overflow-y:auto; padding:16px 16px 80px; scrollbar-width:none; }
.desafio-scroll::-webkit-scrollbar { display:none; }

.mode-selector { display:grid; grid-template-columns:1fr 1fr 1fr; gap:8px; margin-bottom:16px; }
.mode-btn {
  display:flex; flex-direction:column; align-items:center; gap:6px;
  padding:12px 8px; background:var(--muuu-white);
  border:1.5px solid var(--muuu-purple-light); border-radius:12px;
  cursor:pointer; transition:all .2s;
  font-family:var(--font-primary); font-size:12px; font-weight:600; color:var(--texto-secundario);
}
.mode-btn.active { background:var(--muuu-purple-soft); border-color:var(--muuu-purple-primary); color:var(--muuu-purple-dark); }
.mode-btn:hover  { transform:translateY(-1px); }
.mode-icon { font-size:22px; }

.room-code-card { background:var(--muuu-purple-soft); border-radius:16px; padding:16px; text-align:center; margin-bottom:14px; }
.room-code-label { font-size:10px; font-weight:800; color:var(--muuu-purple-dark); text-transform:uppercase; letter-spacing:1px; margin-bottom:8px; }
.room-code-text  { font-size:32px; font-weight:900; color:var(--muuu-purple-primary); letter-spacing:4px; }
.room-code-sub   { font-size:11px; color:var(--texto-secundario); margin-top:4px; }

.select-row { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-bottom:14px; }
.select-field { background:var(--muuu-white); border:1.5px solid var(--muuu-purple-light); border-radius:12px; padding:10px 12px; font-family:var(--font-primary); font-size:12px; color:var(--texto-principal); width:100%; outline:none; }

.recent-title { font-size:11px; font-weight:800; color:var(--texto-principal); text-transform:uppercase; letter-spacing:.5px; margin-bottom:10px; }
.recent-item  { display:flex; align-items:center; gap:10px; background:var(--muuu-white); border-radius:12px; padding:12px 14px; margin-bottom:8px; }
.recent-avatar { width:36px; height:36px; border-radius:50%; background:var(--muuu-success); display:flex; align-items:center; justify-content:center; font-size:13px; font-weight:700; color:white; }
.recent-info   { flex:1; }
.recent-name   { font-size:13px; font-weight:700; color:var(--texto-principal); }
.recent-result { font-size:11px; color:var(--muuu-success); font-weight:600; }
.revancha-btn  { background:var(--muuu-purple-soft); border:1.5px solid var(--muuu-purple-light); border-radius:10px; padding:6px 12px; font-size:12px; font-weight:600; color:var(--muuu-purple-dark); cursor:pointer; }

/* ============================================
   SALA DE DESAFÍO
   ============================================ */
#screen-sala-desafio { background:var(--muuu-bg-student); }

.sala-header { background:linear-gradient(135deg,var(--muuu-purple-primary),var(--muuu-purple-dark)); padding:48px 18px 24px; flex-shrink:0; }
.sala-vs-row { display:flex; align-items:center; justify-content:center; gap:16px; margin-top:14px; }
.sala-player { display:flex; flex-direction:column; align-items:center; gap:6px; }
.sala-avatar { width:50px; height:50px; border-radius:50%; background:#d4a870; display:flex; align-items:center; justify-content:center; font-size:18px; font-weight:700; color:var(--muuu-black-soft); }
.sala-avatar.waiting { background:rgba(255,255,255,.15); border:2px dashed rgba(255,255,255,.4); font-size:22px; }
.sala-pname { font-size:11px; color:rgba(255,255,255,.8); }

.sala-scroll { flex:1; overflow-y:auto; padding:20px 16px 30px; scrollbar-width:none; }
.sala-scroll::-webkit-scrollbar { display:none; }

.room-code-big { text-align:center; font-size:11px; font-weight:700; color:var(--texto-secundario); text-transform:uppercase; letter-spacing:1px; margin-bottom:8px; }
.code-display  { font-size:38px; font-weight:900; color:var(--muuu-purple-primary); text-align:center; letter-spacing:6px; margin-bottom:12px; }

.copy-btn { display:flex; align-items:center; justify-content:center; gap:6px; border:1.5px solid var(--muuu-purple-light); border-radius:12px; padding:10px 16px; font-size:13px; font-weight:600; color:var(--muuu-purple-primary); background:var(--muuu-white); cursor:pointer; margin:0 auto 16px; transition:all .2s; width:fit-content; }
.copy-btn:hover { background:var(--muuu-purple-soft); }

.waiting-card { background:#fffbeb; border:1.5px solid #fde68a; border-radius:12px; padding:14px; display:flex; align-items:flex-start; gap:10px; margin-bottom:16px; }
.waiting-dot  { width:10px; height:10px; border-radius:50%; background:var(--muuu-warning); flex-shrink:0; margin-top:3px; animation:pulse 1.5s infinite; }
@keyframes pulse { 0%,100% { opacity:1; transform:scale(1) } 50% { opacity:.5; transform:scale(.8) } }
.waiting-text { font-size:13px; font-weight:700; color:var(--texto-principal); }
.waiting-sub  { font-size:11px; color:var(--texto-secundario); margin-top:2px; }

.sala-config       { margin-top:4px; }
.sala-config-title { font-size:10px; font-weight:800; text-transform:uppercase; letter-spacing:1px; color:var(--texto-secundario); margin-bottom:10px; }
.sala-config-row   { display:flex; justify-content:space-between; padding:8px 0; border-bottom:1px solid var(--muuu-gray-pale); font-size:13px; }
.sala-config-row:last-child { border-bottom:none; }
.sala-config-key   { color:var(--texto-secundario); }
.sala-config-val   { font-weight:700; color:var(--texto-principal); }
.sala-config-val.orange { color:var(--muuu-warning); }

.cancel-btn { width:100%; padding:13px; background:white; border:1.5px solid var(--muuu-error); border-radius:14px; font-family:var(--font-primary); font-size:13px; font-weight:700; color:var(--muuu-error); cursor:pointer; margin-top:16px; display:flex; align-items:center; justify-content:center; gap:6px; transition:all .2s; }
.cancel-btn:hover { background:#fde8e8; }

/* ============================================
   MI PROGRESO
   ============================================ */
#screen-progreso { background:var(--muuu-white); }

.progreso-header-bg { background:linear-gradient(135deg,var(--muuu-purple-primary),var(--muuu-purple-dark)); padding:48px 20px 24px; text-align:center; flex-shrink:0; }
.progreso-points       { font-size:52px; font-weight:900; color:white; line-height:1; }
.progreso-points-label { font-size:12px; font-weight:700; color:rgba(255,255,255,.8); text-transform:uppercase; letter-spacing:2px; margin-top:4px; }

.progreso-scroll { flex:1; overflow-y:auto; scrollbar-width:none; padding:16px 16px 24px; background:var(--muuu-white); }
.progreso-scroll::-webkit-scrollbar { display:none; }

.stats-row { display:grid; grid-template-columns:1fr 1fr 1fr 1fr; gap:8px; margin-bottom:20px; }
.stat-card { background:var(--muuu-white); border-radius:12px; padding:12px 8px; text-align:center; box-shadow:0 2px 8px rgba(0,0,0,.06); border:1px solid rgba(0,0,0,.04); }
.stat-card .val { font-size:20px; font-weight:800; }
.stat-card .lbl { font-size:10px; color:var(--texto-secundario); margin-top:2px; }
.stat-green  .val { color:var(--muuu-success); }
.stat-purple .val { color:var(--muuu-purple-primary); }
.stat-orange .val { color:var(--muuu-warning); }
.stat-orange2 .val { color:#e74c3c; }

.progress-section-h { font-size:11px; font-weight:800; text-transform:uppercase; letter-spacing:.5px; margin-bottom:12px; color:var(--texto-principal); }
.topic-progress-item { margin-bottom:14px; }
.topic-row { display:flex; justify-content:space-between; font-size:13px; font-weight:600; color:var(--texto-principal); margin-bottom:6px; }
.topic-pct { font-weight:700; }
.pct-green  { color:var(--muuu-success); }
.pct-yellow { color:var(--muuu-warning); }
.pct-orange { color:#e67e22; }
.pct-red    { color:var(--muuu-error); }

.logros-grid { display:grid; grid-template-columns:1fr 1fr 1fr 1fr; gap:8px; margin-top:8px; }
.logro-card  { display:flex; flex-direction:column; align-items:center; gap:4px; padding:12px 8px; background:var(--muuu-white); border-radius:12px; box-shadow:0 2px 8px rgba(0,0,0,.06); border:1px solid rgba(0,0,0,.04); }
.logro-icon  { font-size:22px; }
.logro-lbl   { font-size:10px; font-weight:700; text-align:center; }
.logro-lbl.active-l { color:var(--muuu-warning); }
.logro-lbl.locked   { color:var(--muuu-gray-medium); }

/* ============================================
   RANKING
   ============================================ */
#screen-ranking { background:var(--muuu-bg-student); }

.ranking-top { background:var(--muuu-white); padding:48px 20px 14px; text-align:center; flex-shrink:0; }
.ranking-title-row { display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; }
.ranking-title { font-size:17px; font-weight:800; color:var(--texto-principal); flex:1; text-align:center; }
.my-avatar { width:56px; height:56px; border-radius:50%; background:linear-gradient(135deg,var(--muuu-purple-primary),var(--muuu-purple-dark)); display:flex; align-items:center; justify-content:center; font-size:22px; font-weight:700; color:white; margin:0 auto 8px; box-shadow:0 4px 15px rgba(155,126,199,.4); }

.ranking-scroll { flex:1; overflow-y:auto; padding:12px 16px 100px; scrollbar-width:none; }
.ranking-scroll::-webkit-scrollbar { display:none; }

.ranking-item { display:flex; align-items:center; gap:12px; padding:14px 16px; border-radius:14px; margin-bottom:8px; background:var(--muuu-white); transition:transform .2s; }
.ranking-item:hover { transform:translateX(2px); }
.ranking-item.gold   { background:linear-gradient(135deg,#ffd700,#ffb300); }
.ranking-item.silver { background:linear-gradient(135deg,#e0e0e0,#c8c8c8); }
.ranking-item.bronze { background:linear-gradient(135deg,#cd7f32,#b8680a); }
.ranking-item.me     { background:linear-gradient(135deg,var(--muuu-purple-primary),var(--muuu-purple-dark)); }

.rank-num { width:28px; height:28px; border-radius:50%; background:rgba(255,255,255,.25); display:flex; align-items:center; justify-content:center; font-size:12px; font-weight:800; color:white; flex-shrink:0; }
.ranking-item:not(.gold):not(.silver):not(.bronze):not(.me) .rank-num { background:var(--muuu-purple-soft); color:var(--muuu-purple-dark); }

.rank-avatar { width:38px; height:38px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:15px; font-weight:700; background:rgba(255,255,255,.3); color:var(--muuu-black-soft); }
.rank-info   { flex:1; }
.rank-name   { font-size:14px; font-weight:700; }
.rank-pts    { font-size:12px; opacity:.85; }

.ranking-item.gold .rank-name, .ranking-item.silver .rank-name,
.ranking-item.bronze .rank-name, .ranking-item.me .rank-name { color:white; }
.ranking-item.gold .rank-pts, .ranking-item.silver .rank-pts,
.ranking-item.bronze .rank-pts { color:rgba(0,0,0,.6); }
.ranking-item.me .rank-pts { color:rgba(255,255,255,.8); }
.ranking-item:not(.gold):not(.silver):not(.bronze):not(.me) .rank-name { color:var(--texto-principal); }
.ranking-item:not(.gold):not(.silver):not(.bronze):not(.me) .rank-pts  { color:var(--texto-secundario); }

.rank-badge { font-size:18px; }
.tu-badge   { background:var(--muuu-yellow-primary); color:var(--muuu-black-soft); font-size:9px; font-weight:800; padding:2px 6px; border-radius:6px; }

.ranking-footer { position:absolute; bottom:0; left:0; right:0; background:var(--muuu-white); border-top:1px solid rgba(155,126,199,.15); padding:12px 16px 20px; box-shadow:0 -4px 16px rgba(0,0,0,.06); }
.ranking-footer-label { font-size:13px; font-weight:600; color:var(--texto-secundario); margin-bottom:8px; }
.ranking-footer-bar   { height:8px; background:var(--muuu-gray-pale); border-radius:4px; overflow:hidden; }
.ranking-footer-fill  { height:100%; width:65%; background:linear-gradient(90deg,var(--muuu-purple-primary),var(--muuu-purple-vibrant)); border-radius:4px; }

/* ============================================
   MI PERFIL
   ============================================ */
#screen-perfil { background:var(--muuu-bg-student); }

.perfil-scroll { flex:1; overflow-y:auto; padding:0 0 30px; scrollbar-width:none; }
.perfil-scroll::-webkit-scrollbar { display:none; }

.perfil-top { background:var(--muuu-white); padding:16px 20px 20px; display:flex; flex-direction:column; align-items:center; gap:8px; }
.perfil-avatar { width:72px; height:72px; border-radius:50%; background:var(--muuu-purple-soft); border:3px solid var(--muuu-purple-primary); display:flex; align-items:center; justify-content:center; font-size:28px; font-weight:700; color:var(--muuu-purple-dark); position:relative; }
.perfil-avatar.teacher-av { background:var(--muuu-yellow-light); border-color:var(--muuu-yellow-dark); color:#a07000; }
.edit-avatar-btn { position:absolute; bottom:-2px; right:-2px; width:24px; height:24px; border-radius:50%; background:var(--muuu-yellow-primary); display:flex; align-items:center; justify-content:center; font-size:11px; box-shadow:0 2px 6px rgba(0,0,0,.2); cursor:pointer; }

.perfil-name   { font-size:18px; font-weight:800; color:var(--texto-principal); }
.perfil-level  { background:var(--muuu-purple-primary); color:white; font-size:11px; font-weight:700; padding:3px 14px; border-radius:12px; }
.perfil-level.teacher-badge { background:var(--muuu-black-soft); }

.perfil-stats-row { display:grid; grid-template-columns:1fr 1fr 1fr; gap:10px; margin:14px 16px 0; }
.perfil-stat      { background:var(--muuu-white); border-radius:14px; padding:14px 10px; text-align:center; box-shadow:0 2px 8px rgba(0,0,0,.05); }
.perfil-stat-icon { font-size:20px; margin-bottom:4px; }
.perfil-stat-val  { font-size:18px; font-weight:800; color:var(--texto-principal); }
.perfil-stat-lbl  { font-size:10px; color:var(--texto-secundario); margin-top:2px; }

.perfil-info-card  { margin:14px 16px 0; background:var(--muuu-white); border-radius:16px; padding:16px; box-shadow:0 2px 8px rgba(0,0,0,.05); }
.perfil-info-title { font-size:14px; font-weight:800; margin-bottom:14px; color:var(--texto-principal); }
.perfil-info-item  { display:flex; align-items:center; gap:12px; padding:10px 12px; background:var(--muuu-purple-soft); border-radius:10px; margin-bottom:8px; }
.perfil-info-item.teacher-item { background:var(--muuu-yellow-pale); }
.info-icon  { font-size:18px; }
.info-label { font-size:10px; color:var(--texto-secundario); }
.info-value { font-size:13px; font-weight:600; color:var(--texto-principal); }

.perfil-btn { margin:16px; }

/* ============================================
   MENÚ
   ============================================ */
#screen-menu { background:var(--muuu-bg-student); }

.menu-scroll { flex:1; overflow-y:auto; padding:0 16px 30px; scrollbar-width:none; }
.menu-scroll::-webkit-scrollbar { display:none; }

.menu-top { background:var(--muuu-white); margin:0 -16px 16px; padding:24px 16px 20px; display:flex; flex-direction:column; align-items:center; }
.menu-avatar    { width:64px; height:64px; border-radius:50%; background:var(--muuu-purple-soft); border:2px solid var(--muuu-purple-primary); display:flex; align-items:center; justify-content:center; font-size:26px; font-weight:700; color:var(--muuu-purple-dark); margin-bottom:8px; }
.menu-user-name { font-size:18px; font-weight:800; color:var(--texto-principal); }
.menu-user-role { font-size:13px; color:var(--texto-secundario); }

.menu-item { display:flex; align-items:center; gap:14px; background:var(--muuu-white); border-radius:16px; padding:16px 18px; margin-bottom:10px; cursor:pointer; transition:transform .2s; box-shadow:0 2px 8px rgba(0,0,0,.04); }
.menu-item:hover { transform:translateX(3px); }
.menu-item-icon  { width:42px; height:42px; border-radius:12px; background:var(--muuu-purple-soft); display:flex; align-items:center; justify-content:center; font-size:18px; }
.menu-item-info  { flex:1; }
.menu-item-title { font-size:14px; font-weight:700; color:var(--texto-principal); }
.menu-item-sub   { font-size:12px; color:var(--texto-secundario); }

.menu-logo { margin-top:24px; text-align:center; }

/* ============================================
   CONFIGURACIÓN
   ============================================ */
.config-scroll { flex:1; overflow-y:auto; padding:12px 16px 30px; scrollbar-width:none; }
.config-scroll::-webkit-scrollbar { display:none; }

.config-card       { background:var(--muuu-white); border-radius:16px; padding:16px; margin-bottom:12px; box-shadow:0 2px 8px rgba(0,0,0,.05); }
.config-card-title { font-size:16px; font-weight:700; color:var(--texto-principal); margin-bottom:14px; }
.config-item       { display:flex; align-items:center; gap:12px; padding:10px 0; border-bottom:1px solid var(--muuu-gray-pale); }
.config-item:last-child { border-bottom:none; }
.config-item-icon  { width:36px; height:36px; border-radius:10px; background:var(--muuu-purple-soft); display:flex; align-items:center; justify-content:center; font-size:16px; flex-shrink:0; }
.config-item-icon.teacher-icon { background:var(--muuu-yellow-pale); }
.config-item-info  { flex:1; }
.config-item-label { font-size:13px; font-weight:600; color:var(--texto-principal); }
.config-item-sub   { font-size:11px; color:var(--texto-secundario); }
.config-item-action { color:var(--muuu-gray-medium); font-size:14px; }

.toggle { width:44px; height:24px; background:var(--muuu-gray-light); border-radius:12px; position:relative; cursor:pointer; transition:background .3s; flex-shrink:0; }
.toggle.on { background:var(--muuu-purple-primary); }
.toggle.teacher-toggle.on { background:var(--muuu-yellow-dark); }
.toggle::after { content:''; position:absolute; top:3px; left:3px; width:18px; height:18px; background:white; border-radius:50%; transition:left .3s; box-shadow:0 1px 4px rgba(0,0,0,.2); }
.toggle.on::after { left:23px; }

.config-footer { text-align:center; font-size:11px; color:var(--muuu-gray-medium); margin-top:12px; }

.btn-logout { width:100%; padding:14px; background:#fde8e8; color:var(--muuu-error); border:1.5px solid #fca5a5; border-radius:14px; font-family:var(--font-primary); font-size:13px; font-weight:700; cursor:pointer; transition:all .2s; display:flex; align-items:center; justify-content:center; gap:8px; }
.btn-logout:hover { background:#fee2e2; }

/* ============================================
   DOCENTE HOME
   ============================================ */
#screen-home-teacher { background:var(--muuu-yellow-pale); }

.teacher-home-top  { background:var(--muuu-yellow-dark); padding:48px 18px 16px; flex-shrink:0; }
.teacher-top-row   { display:flex; align-items:center; justify-content:space-between; }
.teacher-greeting  { font-size:16px; font-weight:700; color:var(--muuu-black-soft); }
.teacher-role-badge { background:var(--muuu-black-soft); color:white; font-size:10px; font-weight:700; padding:3px 10px; border-radius:8px; margin-top:3px; display:inline-block; }
.teacher-meta      { font-size:12px; color:rgba(0,0,0,.6); display:flex; gap:12px; margin-top:8px; }
.teacher-meta-item { display:flex; align-items:center; gap:4px; font-weight:600; }

.teacher-home-scroll { flex:1; overflow-y:auto; padding:16px 16px 80px; scrollbar-width:none; }
.teacher-home-scroll::-webkit-scrollbar { display:none; }

.teacher-cta { background:linear-gradient(135deg,var(--muuu-yellow-dark),#e6a800); border-radius:18px; padding:18px; display:flex; align-items:center; gap:14px; margin-bottom:16px; cursor:pointer; box-shadow:0 4px 20px rgba(255,193,7,.4); transition:transform .2s; }
.teacher-cta:hover { transform:translateY(-2px); }
.teacher-cta-icon  { width:48px; height:48px; border-radius:14px; background:rgba(255,255,255,.3); display:flex; align-items:center; justify-content:center; font-size:22px; }
.teacher-cta-info  { flex:1; }
.teacher-cta-title { font-size:16px; font-weight:800; color:var(--muuu-black-soft); }
.teacher-cta-sub   { font-size:12px; color:rgba(0,0,0,.6); }
.teacher-cta-arrow { font-size:18px; color:rgba(0,0,0,.5); }

.teacher-stats-grid { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.teacher-stat-card  { background:var(--muuu-white); border-radius:16px; padding:18px; text-align:center; box-shadow:0 2px 8px rgba(0,0,0,.05); }
.teacher-stat-icon  { font-size:28px; margin-bottom:6px; }
.teacher-stat-val   { font-size:28px; font-weight:900; color:var(--muuu-yellow-dark); }
.teacher-stat-lbl   { font-size:11px; color:var(--texto-secundario); margin-top:2px; }

/* ============================================
   DISEÑAR FLASHCARD
   ============================================ */
#screen-flashcard-designer { background:var(--muuu-yellow-pale); }

.flashcard-scroll { flex:1; overflow-y:auto; padding:12px 16px 20px; scrollbar-width:none; }
.flashcard-scroll::-webkit-scrollbar { display:none; }

.preview-card { background:var(--muuu-white); border:2px dashed var(--muuu-yellow-dark); border-radius:14px; padding:14px; margin-bottom:14px; }
.preview-label   { font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:1px; color:var(--muuu-gray-medium); margin-bottom:8px; }
.preview-question { font-size:12px; color:var(--texto-secundario); margin-bottom:6px; }
.preview-formula  { font-size:18px; color:var(--muuu-purple-vibrant); text-align:center; padding:6px; }
.preview-options  { font-size:11px; color:var(--texto-secundario); }
.preview-eye      { float:right; background:var(--muuu-yellow-pale); border:1px solid var(--muuu-yellow-dark); border-radius:8px; padding:4px 8px; font-size:14px; cursor:pointer; }

.form-section       { background:var(--muuu-white); border-radius:14px; padding:16px; margin-bottom:12px; box-shadow:0 2px 8px rgba(0,0,0,.04); }
.form-section-title { font-size:13px; font-weight:700; color:var(--texto-principal); margin-bottom:10px; }
.form-section-title span { color:var(--muuu-error); }

.form-textarea { width:100%; border:1.5px solid var(--muuu-gray-light); border-radius:10px; padding:10px 12px; font-family:var(--font-primary); font-size:12px; color:var(--texto-principal); resize:none; outline:none; min-height:70px; transition:border-color .2s; }
.form-textarea:focus { border-color:var(--muuu-yellow-dark); }

.format-bar { display:flex; gap:6px; flex-wrap:wrap; margin-top:8px; }
.format-btn { width:32px; height:32px; border:1px solid var(--muuu-gray-light); border-radius:6px; background:white; display:flex; align-items:center; justify-content:center; font-size:12px; font-weight:700; cursor:pointer; color:var(--texto-principal); transition:background .15s; }
.format-btn:hover { background:var(--muuu-yellow-pale); border-color:var(--muuu-yellow-dark); }

.insert-row { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-top:8px; }
.insert-btn { display:flex; align-items:center; justify-content:center; gap:6px; padding:10px; border:1.5px solid var(--muuu-gray-light); border-radius:10px; background:white; font-family:var(--font-primary); font-size:12px; font-weight:600; cursor:pointer; transition:all .2s; color:var(--texto-principal); }
.insert-btn:hover { background:var(--muuu-yellow-pale); border-color:var(--muuu-yellow-dark); }

.option-input-row  { display:flex; align-items:center; gap:8px; margin-bottom:8px; }
.option-letter-label { width:28px; height:28px; border-radius:50%; background:var(--muuu-purple-soft); display:flex; align-items:center; justify-content:center; font-size:12px; font-weight:700; color:var(--muuu-purple-dark); flex-shrink:0; }
.option-input        { flex:1; border:1.5px solid var(--muuu-gray-light); border-radius:8px; padding:8px 10px; font-family:var(--font-primary); font-size:12px; outline:none; transition:border-color .2s; }
.option-input:focus  { border-color:var(--muuu-yellow-dark); }
.option-check-label  { font-size:10px; font-weight:600; color:var(--texto-secundario); text-align:center; }

.flashcard-actions { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-top:14px; }
.btn-borrador { padding:12px; background:var(--muuu-yellow-pale); border:1.5px solid var(--muuu-yellow-dark); border-radius:12px; font-family:var(--font-primary); font-size:13px; font-weight:700; color:#a07000; cursor:pointer; transition:all .2s; }
.btn-publish  { padding:12px; background:linear-gradient(135deg,var(--muuu-yellow-dark),#e6a800); border:none; border-radius:12px; font-family:var(--font-primary); font-size:13px; font-weight:700; color:var(--muuu-black-soft); cursor:pointer; transition:all .2s; display:flex; align-items:center; justify-content:center; gap:6px; box-shadow:0 4px 12px rgba(255,193,7,.4); }

/* ============================================
   NAV CONTROLS (PAGE SWITCHER)
   ============================================ */
.nav-controls { display:flex; gap:8px; flex-wrap:wrap; justify-content:center; max-width:420px; }

.nav-ctrl-btn { padding:8px 14px; background:rgba(155,126,199,.15); border:1.5px solid rgba(155,126,199,.3); border-radius:20px; font-family:var(--font-primary); font-size:11px; font-weight:600; color:var(--muuu-purple-dark); cursor:pointer; transition:all .2s; white-space:nowrap; }
.nav-ctrl-btn:hover  { background:rgba(155,126,199,.3); border-color:var(--muuu-purple-primary); }
.nav-ctrl-btn.active { background:var(--muuu-purple-primary); border-color:var(--muuu-purple-primary); color:white; }
.nav-ctrl-btn.teacher-ctrl { background:rgba(255,193,7,.15); border-color:rgba(255,193,7,.3); color:#a07000; }
.nav-ctrl-btn.teacher-ctrl:hover  { background:rgba(255,193,7,.3); }
.nav-ctrl-btn.teacher-ctrl.active { background:var(--muuu-yellow-dark); border-color:var(--muuu-yellow-dark); color:var(--muuu-black-soft); }

.section-divider { width:1px; height:20px; background:rgba(155,126,199,.3); margin:0 4px; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width:480px) {
  body { padding:10px; background:#f0ebfa; }
  .phone-frame { width:340px; height:700px; }
  .nav-controls { max-width:360px; }
  .nav-ctrl-btn { font-size:10px; padding:6px 10px; }
}
@media (max-width:360px) {
  .phone-frame { width:310px; height:650px; }
}