/* ========================================================
   Agiliza CNH Platform — Complete Stylesheet
   Dark theme, modern, responsive
   ======================================================== */

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

/* ---- CSS Variables ---- */
:root {
  --primary-dark: #0F172A;
  --primary: #1E293B;
  --surface: #1E293B;
  --accent-green: #10B981;
  --accent-amber: #F59E0B;
  --accent-red: #EF4444;
  --white: #F8FAFC;
  --text-light: #94A3B8;
  --text-dim: #64748B;
  --border: #334155;
  --border-light: #475569;
  --card-bg: #1E293B;
  --card-hover: #263347;
  --sidebar-width: 260px;
  --topbar-height: 64px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,.3);
  --shadow-sm: 0 2px 12px rgba(0,0,0,.2);
  --transition: all .2s ease;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--primary-dark);
  color: var(--white);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--accent-green); text-decoration: none; transition: var(--transition); }
a:hover { color: #34D399; }

img { max-width: 100%; display: block; }

h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; }
h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p { color: var(--text-light); }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--primary-dark); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ================================================
   LAYOUT — Sidebar + Main
   ================================================ */

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

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-width);
  background: var(--primary);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform .3s ease;
}

.sidebar-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-logo svg { flex-shrink: 0; }

.sidebar-user {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}

.sidebar-user-name {
  font-weight: 600;
  font-size: .875rem;
  color: var(--white);
  margin-bottom: 2px;
}

.sidebar-user-plan {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.sidebar-nav-section {
  padding: 8px 24px 4px;
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 24px;
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-light);
  transition: var(--transition);
  border-left: 3px solid transparent;
}

.sidebar-nav a:hover {
  background: rgba(255,255,255,.04);
  color: var(--white);
}

.sidebar-nav a.active {
  color: var(--accent-green);
  background: rgba(16,185,129,.08);
  border-left-color: var(--accent-green);
}

.sidebar-nav a svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: .7;
}

.sidebar-nav a.active svg { opacity: 1; }

.sidebar-nav .divider {
  height: 1px;
  background: var(--border);
  margin: 8px 24px;
}

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

.sidebar-upgrade-btn {
  display: block;
  width: 100%;
  padding: 10px;
  background: linear-gradient(135deg, var(--accent-green), #059669);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: .8rem;
  font-weight: 700;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: .5px;
}

.sidebar-upgrade-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(16,185,129,.4);
  color: #fff;
}

/* ---- Sidebar overlay (mobile) ---- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  z-index: 999;
  backdrop-filter: blur(2px);
}
.sidebar-overlay.show { display: block; }

/* ---- Main Content ---- */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---- Top Bar ---- */
.topbar {
  height: var(--topbar-height);
  background: var(--primary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 100;
}

/* Elementos do topbar mobile escondidos por padrao (desktop) */
.topbar-logo-mobile { display: none; }
.topbar-logout-mobile { display: none; }

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  cursor: pointer;
  padding: 4px;
}

.topbar-welcome {
  font-size: .95rem;
  font-weight: 600;
  color: var(--white);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(255,255,255,.06);
}

.topbar-badge.streak { color: var(--accent-amber); }
.topbar-badge.xp { color: var(--accent-green); }

/* ---- Page Container ---- */
.page-content {
  padding: 28px;
  flex: 1;
}

.page-header {
  margin-bottom: 28px;
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.page-header p {
  font-size: .9rem;
  color: var(--text-light);
}

/* ================================================
   CARDS
   ================================================ */

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
}

.card:hover {
  border-color: var(--border-light);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.card-subtitle {
  font-size: .8rem;
  color: var(--text-dim);
}

/* ---- Stat / KPI Cards ---- */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: var(--transition);
}

.stat-card:hover {
  border-color: var(--accent-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.stat-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.stat-card-icon.green { background: rgba(16,185,129,.15); color: var(--accent-green); }
.stat-card-icon.amber { background: rgba(245,158,11,.15); color: var(--accent-amber); }
.stat-card-icon.red { background: rgba(239,68,68,.15); color: var(--accent-red); }
.stat-card-icon.blue { background: rgba(59,130,246,.15); color: #3B82F6; }

.stat-card-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}

.stat-card-label {
  font-size: .8rem;
  color: var(--text-light);
  font-weight: 500;
}

.stat-card-trend {
  font-size: .75rem;
  font-weight: 600;
}

.stat-card-trend.up { color: var(--accent-green); }
.stat-card-trend.down { color: var(--accent-red); }

/* ---- Content Grid ---- */
.content-grid {
  display: grid;
  gap: 24px;
  margin-bottom: 24px;
}

.content-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.content-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.content-grid.cols-2-1 { grid-template-columns: 2fr 1fr; }
.content-grid.cols-1-2 { grid-template-columns: 1fr 2fr; }

/* ================================================
   TABLES
   ================================================ */

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  text-align: left;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text-dim);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 12px 16px;
  font-size: .875rem;
  color: var(--text-light);
  border-bottom: 1px solid rgba(51,65,85,.4);
  vertical-align: middle;
}

tbody tr:hover { background: rgba(255,255,255,.02); }

tbody tr:last-child td { border-bottom: none; }

/* ================================================
   FORMS
   ================================================ */

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--primary-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: .9rem;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent-green);
  box-shadow: 0 0 0 3px rgba(16,185,129,.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-dim);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2394A3B8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-select option { background: var(--primary-dark); color: var(--white); }

.form-textarea { resize: vertical; min-height: 100px; }

.form-error {
  font-size: .75rem;
  color: var(--accent-red);
  margin-top: 4px;
}

.form-hint {
  font-size: .75rem;
  color: var(--text-dim);
  margin-top: 4px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ---- Checkbox & Radio ---- */
.form-check {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: .875rem;
  color: var(--text-light);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-green);
  cursor: pointer;
}

/* ================================================
   BUTTONS
   ================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: .875rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-green);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: #059669;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(16,185,129,.3);
  color: #fff;
}

.btn-secondary {
  background: rgba(255,255,255,.06);
  color: var(--white);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) {
  background: rgba(255,255,255,.1);
  border-color: var(--border-light);
  color: var(--white);
}

.btn-danger {
  background: var(--accent-red);
  color: #fff;
}
.btn-danger:hover:not(:disabled) {
  background: #DC2626;
  color: #fff;
}

.btn-amber {
  background: var(--accent-amber);
  color: #0F172A;
}
.btn-amber:hover:not(:disabled) {
  background: #D97706;
  color: #0F172A;
}

.btn-ghost {
  background: transparent;
  color: var(--text-light);
}
.btn-ghost:hover { color: var(--white); background: rgba(255,255,255,.04); }

.btn-sm { padding: 6px 14px; font-size: .8rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-block { width: 100%; }

/* ================================================
   MODALS
   ================================================ */

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.65);
  z-index: 9000;
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 90%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
  animation: modalIn .25s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 1.1rem; }

.modal-close {
  background: none;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  font-size: 1.3rem;
  padding: 4px;
  line-height: 1;
}
.modal-close:hover { color: var(--white); }

.modal-body { padding: 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* ================================================
   QUIZ / SIMULADO INTERFACE
   ================================================ */

.quiz-container {
  max-width: 900px;
  margin: 0 auto;
}

.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.quiz-progress-bar {
  flex: 1;
  min-width: 200px;
  height: 8px;
  background: var(--primary-dark);
  border-radius: 4px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: var(--accent-green);
  border-radius: 4px;
  transition: width .4s ease;
}

.quiz-timer {
  font-size: 1.1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--white);
  min-width: 70px;
  text-align: center;
}

.quiz-timer.warning { color: var(--accent-amber); }
.quiz-timer.danger { color: var(--accent-red); animation: pulse 1s infinite; }

@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:.5;} }

.quiz-score-tracker {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-light);
}

.quiz-question-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
}

.quiz-question-num {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-green);
  margin-bottom: 12px;
}

.quiz-question-text {
  font-size: 1.05rem;
  color: var(--white);
  line-height: 1.7;
  margin-bottom: 24px;
}

.quiz-question-img {
  width: 100%;
  max-width: 400px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  border: 1px solid var(--border);
}

.quiz-options { display: flex; flex-direction: column; gap: 12px; }

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 18px;
  background: var(--primary-dark);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-size: .9rem;
  color: var(--text-light);
}

.quiz-option:hover:not(.disabled) {
  border-color: var(--border-light);
  background: rgba(255,255,255,.04);
}

.quiz-option.selected {
  border-color: var(--accent-green);
  background: rgba(16,185,129,.08);
  color: var(--white);
}

.quiz-option.correct {
  border-color: var(--accent-green);
  background: rgba(16,185,129,.12);
  color: var(--accent-green);
}

.quiz-option.wrong {
  border-color: var(--accent-red);
  background: rgba(239,68,68,.1);
  color: var(--accent-red);
}

.quiz-option.disabled { cursor: default; opacity: .7; }

.quiz-option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--border);
  color: var(--white);
  font-weight: 700;
  font-size: .8rem;
  flex-shrink: 0;
}

.quiz-option.selected .quiz-option-letter { background: var(--accent-green); color: #fff; }
.quiz-option.correct .quiz-option-letter { background: var(--accent-green); color: #fff; }
.quiz-option.wrong .quiz-option-letter { background: var(--accent-red); color: #fff; }

.quiz-explanation {
  margin-top: 20px;
  padding: 16px;
  background: rgba(16,185,129,.06);
  border: 1px solid rgba(16,185,129,.2);
  border-radius: var(--radius-sm);
  font-size: .85rem;
  color: var(--text-light);
  line-height: 1.6;
}

.quiz-explanation strong { color: var(--accent-green); }

.quiz-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ---- Question Grid (sidebar on quiz) ---- */
.quiz-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
  margin-top: 16px;
}

.quiz-grid-item {
  width: 100%;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 600;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  background: var(--primary-dark);
  color: var(--text-dim);
  cursor: pointer;
  transition: var(--transition);
}

.quiz-grid-item.current { border-color: var(--accent-green); color: var(--accent-green); }
.quiz-grid-item.answered { background: var(--accent-green); color: #fff; border-color: var(--accent-green); }
.quiz-grid-item.wrong-answer { background: var(--accent-red); color: #fff; border-color: var(--accent-red); }

/* ---- Quiz Result Screen ---- */
.quiz-result {
  text-align: center;
  padding: 40px 24px;
}

.quiz-result-score {
  font-size: 3rem;
  font-weight: 900;
  color: var(--white);
  margin: 16px 0 8px;
}

.quiz-result-badge {
  display: inline-block;
  padding: 8px 24px;
  font-size: 1.1rem;
  font-weight: 800;
  border-radius: 30px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 32px;
}

.quiz-result-badge.pass {
  background: rgba(16,185,129,.15);
  color: var(--accent-green);
  border: 2px solid var(--accent-green);
}

.quiz-result-badge.fail {
  background: rgba(239,68,68,.15);
  color: var(--accent-red);
  border: 2px solid var(--accent-red);
}

.quiz-result-breakdown {
  text-align: left;
  margin: 24px 0;
}

.quiz-breakdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
}

.quiz-breakdown-label {
  flex: 1;
  font-size: .85rem;
  color: var(--text-light);
}

.quiz-breakdown-bar {
  flex: 2;
  height: 8px;
  background: var(--primary-dark);
  border-radius: 4px;
  overflow: hidden;
}

.quiz-breakdown-fill {
  height: 100%;
  border-radius: 4px;
  transition: width .6s ease;
}

.quiz-breakdown-pct {
  font-size: .85rem;
  font-weight: 600;
  color: var(--white);
  min-width: 42px;
  text-align: right;
}

/* ================================================
   CHAT INTERFACE (Tutor)
   ================================================ */

.chat-layout {
  display: flex;
  height: calc(100vh - var(--topbar-height));
  overflow: hidden;
}

.chat-sidebar {
  width: 280px;
  background: var(--primary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.chat-sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.chat-sidebar-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.chat-sidebar-item {
  padding: 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 4px;
}

.chat-sidebar-item:hover { background: rgba(255,255,255,.04); }
.chat-sidebar-item.active { background: rgba(16,185,129,.1); }

.chat-sidebar-item-title {
  font-size: .85rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-sidebar-item-date {
  font-size: .72rem;
  color: var(--text-dim);
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-message {
  display: flex;
  gap: 12px;
  max-width: 80%;
  animation: fadeUp .3s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.chat-message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.chat-message.assistant .chat-message-avatar {
  background: rgba(16,185,129,.15);
  color: var(--accent-green);
}

.chat-message.user .chat-message-avatar {
  background: rgba(59,130,246,.15);
  color: #3B82F6;
}

.chat-message-bubble {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: .9rem;
  line-height: 1.6;
}

.chat-message.assistant .chat-message-bubble {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-light);
}

.chat-message.user .chat-message-bubble {
  background: var(--accent-green);
  color: #fff;
}

.chat-message-bubble p { color: inherit; margin-bottom: 8px; }
.chat-message-bubble p:last-child { margin-bottom: 0; }
.chat-message-bubble strong { color: var(--white); }
.chat-message-bubble code {
  background: rgba(0,0,0,.3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: .82rem;
}

.chat-message-bubble ul, .chat-message-bubble ol {
  margin: 8px 0;
  padding-left: 20px;
}

.chat-message-bubble li { margin-bottom: 4px; }

.chat-input-area {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: var(--primary);
}

.chat-input-wrapper {
  display: flex;
  gap: 12px;
  align-items: flex-end;
}

.chat-input {
  flex: 1;
  padding: 12px 16px;
  background: var(--primary-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: .9rem;
  font-family: inherit;
  resize: none;
  max-height: 120px;
  outline: none;
  transition: var(--transition);
}

.chat-input:focus { border-color: var(--accent-green); }

.chat-send-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-green);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.chat-send-btn:hover { background: #059669; }
.chat-send-btn:disabled { opacity: .4; cursor: not-allowed; }

.chat-limit {
  text-align: center;
  padding: 8px;
  font-size: .75rem;
  color: var(--text-dim);
}

/* ================================================
   PROGRESS BARS & GAUGES
   ================================================ */

.progress-bar {
  height: 8px;
  background: var(--primary-dark);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width .6s ease;
  background: var(--accent-green);
}

.progress-fill.amber { background: var(--accent-amber); }
.progress-fill.red { background: var(--accent-red); }
.progress-fill.blue { background: #3B82F6; }

/* ---- Circular Gauge ---- */
.gauge-container {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.gauge-svg { transform: rotate(-90deg); }

.gauge-bg {
  fill: none;
  stroke: var(--border);
}

.gauge-fill {
  fill: none;
  stroke-linecap: round;
  transition: stroke-dashoffset 1.2s ease;
}

.gauge-center {
  position: absolute;
  text-align: center;
}

.gauge-value {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--white);
  line-height: 1;
}

.gauge-label {
  font-size: .8rem;
  color: var(--text-light);
  margin-top: 4px;
}

/* ================================================
   BADGES / ACHIEVEMENTS
   ================================================ */

.badges-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 90px;
  text-align: center;
}

.badge-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  border: 2px solid var(--border);
  background: var(--primary-dark);
  transition: var(--transition);
}

.badge-icon.earned {
  border-color: var(--accent-amber);
  background: rgba(245,158,11,.12);
  box-shadow: 0 0 16px rgba(245,158,11,.2);
}

.badge-icon.unearned {
  opacity: .35;
  filter: grayscale(1);
}

.badge-name {
  font-size: .7rem;
  font-weight: 600;
  color: var(--text-light);
  line-height: 1.3;
}

/* ================================================
   STUDY HEATMAP
   ================================================ */

.heatmap {
  display: flex;
  gap: 3px;
  overflow-x: auto;
  padding: 8px 0;
}

.heatmap-week {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.heatmap-cell {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: var(--primary-dark);
  border: 1px solid rgba(51,65,85,.3);
}

.heatmap-cell.level-1 { background: rgba(16,185,129,.2); }
.heatmap-cell.level-2 { background: rgba(16,185,129,.4); }
.heatmap-cell.level-3 { background: rgba(16,185,129,.6); }
.heatmap-cell.level-4 { background: rgba(16,185,129,.9); }

/* ================================================
   LESSON CARDS (Pratica)
   ================================================ */

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.lesson-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: var(--transition);
}

.lesson-card:hover {
  border-color: var(--accent-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.lesson-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 12px;
  background: rgba(16,185,129,.1);
}

.lesson-card-title {
  font-size: .95rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 4px;
}

.lesson-card-difficulty {
  font-size: .75rem;
  color: var(--accent-amber);
  margin-bottom: 8px;
}

.lesson-card-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .75rem;
  font-weight: 600;
}

.lesson-card-status.done { color: var(--accent-green); }
.lesson-card-status.pending { color: var(--text-dim); }

/* ================================================
   SUBJECT CARDS
   ================================================ */

.subject-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  cursor: pointer;
  transition: var(--transition);
}

.subject-card:hover {
  border-color: var(--accent-green);
  transform: translateY(-2px);
}

.subject-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.subject-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.subject-card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
}

.subject-card-info {
  font-size: .8rem;
  color: var(--text-dim);
}

.subject-card-mastery {
  margin-top: 12px;
}

.subject-card-mastery-label {
  display: flex;
  justify-content: space-between;
  font-size: .8rem;
  margin-bottom: 6px;
}

/* ================================================
   LOADING STATES & SKELETONS
   ================================================ */

.skeleton-block {
  background: linear-gradient(90deg, var(--border) 25%, var(--card-bg) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
  height: 80px;
  margin-bottom: 12px;
}

.skeleton-line {
  background: linear-gradient(90deg, var(--border) 25%, var(--card-bg) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
  height: 14px;
  margin-bottom: 8px;
}

.skeleton-line.w-50 { width: 50%; }
.skeleton-line.w-75 { width: 75%; }
.skeleton-line.w-30 { width: 30%; }

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.loading-spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-green);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15,23,42,.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  border-radius: var(--radius);
}

/* ================================================
   PLAN BADGES
   ================================================ */

.plan-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.plan-badge.free { background: rgba(148,163,184,.15); color: var(--text-light); }
.plan-badge.pro { background: rgba(16,185,129,.15); color: var(--accent-green); }
.plan-badge.vip { background: rgba(245,158,11,.15); color: var(--accent-amber); }

/* ================================================
   PRICING CARDS (upgrade page)
   ================================================ */

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  border-color: var(--accent-amber);
  transform: scale(1.03);
}

.pricing-card.featured::before {
  content: 'MAIS POPULAR';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-amber);
  color: #0F172A;
  font-size: .7rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 20px;
  letter-spacing: .5px;
}

.pricing-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 4px;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--white);
  margin: 16px 0;
}

.pricing-price span {
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-light);
}

.pricing-features {
  text-align: left;
  margin: 20px 0;
  list-style: none;
}

.pricing-features li {
  padding: 6px 0;
  font-size: .85rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-features li::before {
  content: '✓';
  color: var(--accent-green);
  font-weight: 700;
}

.pricing-guarantee {
  font-size: .75rem;
  color: var(--text-dim);
  margin-top: 12px;
}

/* ================================================
   ADMIN SPECIFIC
   ================================================ */

.admin-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  background: var(--primary-dark);
  padding: 4px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.admin-tab {
  padding: 10px 20px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-light);
  background: transparent;
  border: none;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.admin-tab:hover { color: var(--white); }
.admin-tab.active { background: var(--accent-green); color: #fff; }

.admin-kpi { text-align: center; }
.admin-kpi-value {
  font-size: 2rem;
  font-weight: 900;
  color: var(--white);
}
.admin-kpi-label {
  font-size: .8rem;
  color: var(--text-light);
}

/* ================================================
   AUTH PAGES (login/register)
   ================================================ */

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-dark);
  padding: 20px;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 32px;
}

.auth-logo h1 {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.auth-title {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 4px;
}

.auth-subtitle {
  text-align: center;
  font-size: .85rem;
  color: var(--text-light);
  margin-bottom: 28px;
}

.auth-error {
  background: rgba(239,68,68,.1);
  border: 1px solid rgba(239,68,68,.3);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: .85rem;
  color: var(--accent-red);
  margin-bottom: 20px;
  display: none;
}

.auth-error.show { display: block; }

.auth-links {
  text-align: center;
  margin-top: 20px;
  font-size: .85rem;
  color: var(--text-light);
}

.auth-links a { font-weight: 600; }

.auth-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 20px 0;
  font-size: .8rem;
  color: var(--text-dim);
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ================================================
   CATEGORY SELECTOR (register)
   ================================================ */

.category-select {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.category-option {
  padding: 14px;
  background: var(--primary-dark);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

.category-option:hover { border-color: var(--border-light); }
.category-option.selected {
  border-color: var(--accent-green);
  background: rgba(16,185,129,.08);
}

.category-option-icon { font-size: 1.5rem; margin-bottom: 6px; }
.category-option-label { font-size: .8rem; font-weight: 600; color: var(--white); }

/* ================================================
   XP Animation
   ================================================ */

.xp-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent-amber);
  text-shadow: 0 0 20px rgba(245,158,11,.5);
  pointer-events: none;
  z-index: 99999;
  animation: xpFloat 1.5s ease forwards;
}

@keyframes xpFloat {
  0% { opacity: 1; transform: translate(-50%, -50%) scale(.8); }
  50% { opacity: 1; transform: translate(-50%, -80%) scale(1.2); }
  100% { opacity: 0; transform: translate(-50%, -120%) scale(1); }
}

/* ================================================
   CONFIDENCE SLIDER
   ================================================ */

.confidence-slider {
  display: flex;
  align-items: center;
  gap: 8px;
}

.confidence-star {
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  color: var(--border);
}

.confidence-star.active { color: var(--accent-amber); }
.confidence-star:hover { transform: scale(1.2); }

/* ================================================
   TRUST BADGES
   ================================================ */

.trust-badges {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .8rem;
  color: var(--text-light);
}

.trust-badge-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(16,185,129,.1);
  color: var(--accent-green);
  font-size: .9rem;
}

/* ================================================
   STUDY PLAN (dashboard)
   ================================================ */

.study-plan-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(51,65,85,.3);
}

.study-plan-item:last-child { border-bottom: none; }

.study-plan-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.study-plan-check.done {
  background: var(--accent-green);
  border-color: var(--accent-green);
  color: #fff;
  font-size: .7rem;
}

.study-plan-text {
  font-size: .875rem;
  color: var(--text-light);
}

.study-plan-text.done {
  text-decoration: line-through;
  opacity: .5;
}

.study-plan-tag {
  font-size: .7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 12px;
  margin-left: auto;
  flex-shrink: 0;
}

.study-plan-tag.simulado { background: rgba(59,130,246,.15); color: #3B82F6; }
.study-plan-tag.leitura { background: rgba(16,185,129,.15); color: var(--accent-green); }
.study-plan-tag.revisao { background: rgba(245,158,11,.15); color: var(--accent-amber); }

/* ================================================
   QUICK ACTIONS
   ================================================ */

.quick-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quick-action {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--primary-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.quick-action:hover {
  border-color: var(--accent-green);
  background: rgba(16,185,129,.05);
}

.quick-action-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: rgba(16,185,129,.1);
}

.quick-action-text {
  font-size: .875rem;
  font-weight: 600;
  color: var(--white);
}

.quick-action-sub {
  font-size: .75rem;
  color: var(--text-dim);
}

/* ================================================
   SEARCH INPUT
   ================================================ */

.search-input-wrapper {
  position: relative;
  margin-bottom: 16px;
}

.search-input-wrapper svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-dim);
}

.search-input {
  width: 100%;
  padding: 10px 14px 10px 42px;
  background: var(--primary-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: .875rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.search-input:focus { border-color: var(--accent-green); }

/* ================================================
   PAGINATION
   ================================================ */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.pagination-btn {
  padding: 6px 12px;
  font-size: .8rem;
  font-weight: 600;
  background: var(--primary-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
}

.pagination-btn:hover { border-color: var(--accent-green); color: var(--white); }
.pagination-btn.active { background: var(--accent-green); color: #fff; border-color: var(--accent-green); }

/* ================================================
   TABS (generic)
   ================================================ */

.tab-group {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  background: var(--primary-dark);
  padding: 4px;
  border-radius: var(--radius-sm);
}

.tab-btn {
  padding: 10px 20px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-light);
  background: transparent;
  border: none;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn:hover { color: var(--white); }
.tab-btn.active { background: var(--accent-green); color: #fff; }

/* ================================================
   EMPTY STATES
   ================================================ */

.empty-state {
  text-align: center;
  padding: 48px 24px;
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: .4;
}

.empty-state-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 8px;
}

.empty-state-text {
  font-size: .9rem;
  color: var(--text-light);
  margin-bottom: 20px;
}

/* ================================================
   RESPONSIVE
   ================================================ */

@media (max-width: 1024px) {
  .stat-cards { grid-template-columns: repeat(2, 1fr); }
  .content-grid.cols-2,
  .content-grid.cols-2-1,
  .content-grid.cols-1-2,
  .content-grid.cols-3 { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
  .chat-sidebar { display: none; }
}

@media (max-width: 768px) {
  /* Sidebar TOTALMENTE escondida no mobile — navegacao exclusiva via bottom-nav */
  .sidebar { display: none !important; transform: none !important; }
  .sidebar-overlay { display: none !important; }
  .topbar-toggle { display: none !important; }

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

  /* Topbar compacto (app-like) */
  .topbar {
    height: 52px;
    padding: 0 14px;
    background: rgba(15, 23, 42, .96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }
  .topbar-welcome { display: none !important; }
  .topbar-left { gap: 8px; }
  .topbar-logo-mobile {
    display: flex !important;
    align-items: center;
    gap: 8px;
    font-family: 'Inter', sans-serif;
    font-weight: 800;
    font-size: .95rem;
    color: var(--white);
    letter-spacing: .2px;
  }
  .topbar-logo-mobile svg {
    width: 22px; height: 22px;
  }
  .topbar-logout-mobile {
    background: rgba(255,255,255,.06);
    border: none;
    width: 32px; height: 32px;
    border-radius: 8px;
    display: flex !important;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    cursor: pointer;
    transition: color .2s, background .2s;
  }
  .topbar-logout-mobile:hover { color: var(--accent-red); background: rgba(239,68,68,.1); }
  .topbar-logout-mobile svg { width: 18px; height: 18px; }

  .page-content { padding: 16px; }

  .stat-cards { grid-template-columns: 1fr 1fr; gap: 10px; }

  .form-row { grid-template-columns: 1fr; }

  .quiz-header { padding: 12px 16px; }
  .quiz-question-card { padding: 20px; }

  .category-select { grid-template-columns: 1fr; }

  .lesson-grid { grid-template-columns: 1fr; }

  .chat-message { max-width: 90%; }

  .admin-tabs { overflow-x: auto; }

  h1 { font-size: 1.4rem; }

  .auth-card { padding: 28px 20px; }

  .badges-grid { gap: 10px; }
  .badge-item { width: 72px; }
  .badge-icon { width: 44px; height: 44px; font-size: 1.1rem; }

  .trust-badges { gap: 16px; }

  .pricing-card.featured { transform: none; }
}

@media (max-width: 480px) {
  .stat-cards { grid-template-columns: 1fr; }
  .topbar { padding: 0 14px; }
  .quiz-grid { grid-template-columns: repeat(5, 1fr); }
}

/* ================================================
   BOTTOM NAVIGATION (MOBILE APP-LIKE)
   Auto-injetada via auth-guard.js em paginas autenticadas
   ================================================ */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 62px;
  background: rgba(15, 23, 42, .95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid rgba(255,255,255,.06);
  padding: 6px 4px calc(6px + env(safe-area-inset-bottom, 0px)) 4px;
  z-index: 40;
  justify-content: space-around;
  align-items: center;
}
.bottom-nav a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  text-decoration: none;
  color: var(--text-dim);
  font-size: .62rem;
  font-weight: 600;
  padding: 6px 2px;
  border-radius: 10px;
  transition: color .2s, background .2s;
  min-height: 48px;
  position: relative;
}
.bottom-nav a.active { color: var(--accent-green); }
.bottom-nav a.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent-green);
  border-radius: 0 0 2px 2px;
}
.bottom-nav a.locked { opacity: .55; }
.bottom-nav a svg {
  width: 22px;
  height: 22px;
  stroke-width: 2;
}
.bottom-nav-lock {
  position: absolute;
  top: 3px;
  right: 18%;
  font-size: .52rem;
  background: rgba(245,158,11,.95);
  color: #0F172A;
  padding: 1px 4px;
  border-radius: 4px;
  font-weight: 800;
  letter-spacing: .3px;
  line-height: 1.2;
}

@media (max-width: 768px) {
  .bottom-nav { display: flex; }
  .page-content { padding-bottom: calc(80px + env(safe-area-inset-bottom, 0px)) !important; }
  body.hide-bottom-nav .bottom-nav { display: none; }
  body.hide-bottom-nav .page-content { padding-bottom: 20px !important; }
}

@media (max-width: 380px) {
  .bottom-nav a { font-size: .56rem; }
  .bottom-nav a svg { width: 20px; height: 20px; }
  .bottom-nav-lock { font-size: .48rem; right: 12%; }
}

/* ================================================
   MOBILE OPTIMIZATION — paginas gerais
   ================================================ */
@media (max-width: 640px) {
  .topbar-welcome { display: none; }
  .topbar-right { gap: 8px; }
  .topbar-badge { font-size: .72rem; padding: 3px 10px; }
  .page-content { padding: 16px 14px; }
  .content-card { padding: 18px 14px; }
  .stat-card { padding: 14px 12px; }
  .stat-card-value { font-size: 1.4rem; }
  .stat-card-label { font-size: .7rem; }
  h1 { font-size: 1.3rem !important; }
  h2 { font-size: 1.1rem !important; }
  .page-header { margin-bottom: 16px; }
  .page-header p { font-size: .82rem; }
  .btn-lg { padding: 12px 20px; font-size: .9rem; }
}

@media (max-width: 380px) {
  .page-content { padding: 14px 12px; }
  .topbar-badge.xp { display: none !important; }
}

/* ================================================
   ANTI-OVERFLOW HORIZONTAL (MOBILE)
   Previne "balanço lateral" em qualquer pagina
   ================================================ */
html {
  overflow-x: hidden;
  max-width: 100vw;
}
body {
  overflow-x: hidden;
  max-width: 100vw;
  position: relative;
}
img, video, iframe, canvas {
  max-width: 100%;
  height: auto;
}
/* Quebra de palavras longas (URLs, emails) em mobile */
@media (max-width: 768px) {
  p, h1, h2, h3, h4, h5, h6, span, a, li, td, th {
    word-wrap: break-word;
    overflow-wrap: break-word;
  }
  /* Tabelas sempre com scroll interno ao inves de overflow na pagina */
  .table-wrapper, .sim-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
  }
  /* Flex containers nao devem forcar largura */
  .platform-layout { max-width: 100vw; overflow-x: hidden; }
  .main-content { max-width: 100vw; overflow-x: hidden; min-width: 0; }
  .page-content { max-width: 100%; overflow-x: hidden; }
  /* Quiz header pode estourar (progress bar min-width 200px + timer) */
  .quiz-header { flex-wrap: wrap; }
  .quiz-progress-bar { min-width: 120px; }
  /* Cards nao podem estourar */
  .glass-card, .content-card, .card, .chart-card, .kpi-card { max-width: 100%; box-sizing: border-box; }
  /* Chart svg */
  .chart-container svg { max-width: 100%; height: auto; }
  /* Pre/code nao devem forcar largura */
  pre, code { white-space: pre-wrap; word-break: break-word; max-width: 100%; overflow-x: auto; }
}

/* ================================================
   PREMIUM ENHANCEMENTS
   ================================================ */

/* Glassmorphism card variant */
.card-glass {
  background: rgba(30, 41, 59, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(148, 163, 184, 0.1);
}

/* Animated gradient border */
.card-glow {
  position: relative;
  overflow: hidden;
}
.card-glow::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent-green), transparent, var(--accent-amber));
  opacity: 0;
  transition: opacity .3s ease;
  z-index: -1;
}
.card-glow:hover::before { opacity: 1; }

/* Gauge ring for approval probability */
.gauge-ring {
  transform: rotate(-90deg);
  filter: drop-shadow(0 0 8px rgba(16, 185, 129, 0.3));
}
.gauge-ring circle {
  transition: stroke-dasharray 1.5s ease;
}

/* Animated counter */
@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-count {
  animation: countUp .5s ease forwards;
}

/* Trend arrow */
.trend-up { color: var(--accent-green); }
.trend-down { color: var(--accent-red); }
.trend-neutral { color: var(--text-dim); }

/* Flame animation for streak */
@keyframes flicker {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.05) rotate(-2deg); }
  50% { transform: scale(1.1); }
  75% { transform: scale(1.05) rotate(2deg); }
}
.flame-animate {
  animation: flicker 1.5s ease-in-out infinite;
  display: inline-block;
}

/* XP popup */
@keyframes xpFloat {
  0% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-60px) scale(1.3); }
}
.xp-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-amber);
  text-shadow: 0 0 20px rgba(245, 158, 11, 0.5);
  animation: xpFloat 1.5s ease-out forwards;
  z-index: 99999;
  pointer-events: none;
}

/* Pulse effect for live badge */
@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}
.pulse-badge {
  animation: pulse-green 2s ease-in-out infinite;
}

/* Achievement glow effect */
.badge-icon.earned {
  position: relative;
  animation: none;
}
.badge-icon.earned::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-green), var(--accent-amber));
  z-index: -1;
  opacity: .6;
  filter: blur(4px);
}

/* Locked achievement overlay */
.badge-locked {
  position: relative;
  opacity: .35;
  filter: grayscale(1);
}
.badge-locked::after {
  content: '🔒';
  position: absolute;
  bottom: -4px;
  right: -4px;
  font-size: .7rem;
}

/* Progress bar shimmer */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.progress-fill.animated {
  background-size: 200% 100%;
  animation: shimmer 2s ease-in-out infinite;
}
.progress-fill.green { background: linear-gradient(90deg, #10B981, #34D399, #10B981); background-size: 200% 100%; }
.progress-fill.amber { background: linear-gradient(90deg, #F59E0B, #FBBF24, #F59E0B); background-size: 200% 100%; }
.progress-fill.red { background: linear-gradient(90deg, #EF4444, #F87171, #EF4444); background-size: 200% 100%; }

/* Chart tooltip */
.chart-tooltip {
  position: absolute;
  background: var(--primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 6px 12px;
  font-size: .75rem;
  font-weight: 600;
  color: var(--white);
  pointer-events: none;
  white-space: nowrap;
  z-index: 10;
  box-shadow: var(--shadow-sm);
}

/* Upgrade CTA banner */
.upgrade-banner {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(245, 158, 11, 0.1));
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.upgrade-banner-text h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}
.upgrade-banner-text p {
  font-size: .85rem;
  color: var(--text-dim);
}

/* Quick action cards */
.quick-action {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(30, 41, 59, 0.5);
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.quick-action:hover {
  border-color: var(--accent-green);
  background: rgba(16, 185, 129, 0.05);
  transform: translateY(-2px);
  color: inherit;
}
.quick-action-icon {
  font-size: 1.5rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: rgba(16, 185, 129, 0.1);
  flex-shrink: 0;
}
.quick-action-text {
  font-weight: 600;
  font-size: .9rem;
  color: var(--white);
}
.quick-action-sub {
  font-size: .75rem;
  color: var(--text-dim);
  margin-top: 2px;
}

/* Smooth fade-in for page load */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-content > * {
  animation: fadeIn .4s ease forwards;
}
.page-content > *:nth-child(2) { animation-delay: .05s; }
.page-content > *:nth-child(3) { animation-delay: .1s; }
.page-content > *:nth-child(4) { animation-delay: .15s; }
.page-content > *:nth-child(5) { animation-delay: .2s; }
.page-content > *:nth-child(6) { animation-delay: .25s; }
.page-content > *:nth-child(7) { animation-delay: .3s; }

/* Skeleton loading improved */
.skeleton-block {
  background: linear-gradient(90deg, var(--card-bg), var(--card-hover), var(--card-bg));
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
  height: 60px;
  margin-bottom: 12px;
}
.skeleton-line {
  background: linear-gradient(90deg, var(--card-bg), var(--card-hover), var(--card-bg));
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 4px;
  height: 16px;
  margin-bottom: 8px;
}
.skeleton-line.w-75 { width: 75%; }
.skeleton-line.w-50 { width: 50%; }

/* Study plan items */
.study-plan-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 8px;
  transition: var(--transition);
}
.study-plan-item:hover {
  border-color: var(--border-light);
  background: rgba(255,255,255,.02);
}
.study-plan-check {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .7rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: var(--transition);
  color: var(--accent-green);
}
.study-plan-check.done {
  background: var(--accent-green);
  border-color: var(--accent-green);
  color: #fff;
}
.study-plan-text {
  flex: 1;
  font-size: .85rem;
  color: var(--text-light);
}
.study-plan-text.done {
  text-decoration: line-through;
  opacity: .5;
}
.study-plan-tag {
  font-size: .65rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 10px;
  letter-spacing: .3px;
}
.study-plan-tag.simulado { background: rgba(16, 185, 129, .15); color: var(--accent-green); }
.study-plan-tag.revisao { background: rgba(245, 158, 11, .15); color: var(--accent-amber); }
.study-plan-tag.leitura { background: rgba(59, 130, 246, .15); color: #3B82F6; }

/* Empty state improved */
.empty-state {
  text-align: center;
  padding: 32px;
}
.empty-state-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}
.empty-state-text {
  font-size: .9rem;
  color: var(--text-dim);
  line-height: 1.6;
}