/* ===================================
   CHEGA ENCCEJA — Sistema de Design
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Nunito:wght@400;600;700;800&display=swap');

/* === Variaveis === */
:root {
  --verde: #00A651;
  --amarelo: #FFD600;
  --azul: #0057A8;
  --preto: #111111;
  --branco: #ffffff;
  --cinza-claro: #f5f5f5;
  --cinza: #e0e0e0;
  --cinza-medio: #9e9e9e;
  --sombra: 0 2px 12px rgba(0,0,0,0.08);
  --sombra-hover: 0 4px 20px rgba(0,0,0,0.14);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.18s ease;
  --vermelho: #e53935;
  --vermelho-escuro: #b71c1c;
  --azul-claro: #f0f5ff;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Nunito', sans-serif;
  background-color: var(--branco);
  color: var(--preto);
  line-height: 1.5;
  min-height: 100vh;
}

h1, h2, h3, .titulo {
  font-family: 'Bebas Neue', sans-serif;
  letter-spacing: 0.03em;
}

/* === Layout === */
.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 16px;
}

.container--wide {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 16px;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* === Navbar === */
.navbar {
  background: var(--branco);
  border-bottom: 2px solid var(--cinza);
  padding: 0 16px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar__logo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 24px;
  color: var(--verde);
  letter-spacing: 0.05em;
  text-decoration: none;
}

.navbar__logo span {
  color: var(--amarelo);
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar__xp {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 14px;
  color: var(--azul);
}

/* === Botoes === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-family: 'Nunito', sans-serif;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--verde);
  color: var(--branco);
  box-shadow: 0 4px 0 #007a3d;
}

.btn--primary:hover {
  opacity: 0.92;
}

.btn--primary:active {
  box-shadow: 0 2px 0 #007a3d;
  transform: translateY(2px);
}

.btn--secondary {
  background: var(--azul);
  color: var(--branco);
  box-shadow: 0 4px 0 #003d7a;
}

.btn--secondary:active {
  box-shadow: 0 2px 0 #003d7a;
  transform: translateY(2px);
}

.btn--secondary:hover {
  opacity: 0.92;
}

.btn--outline {
  background: transparent;
  color: var(--verde);
  border: 2px solid var(--verde);
  box-shadow: none;
}

.btn--danger {
  background: var(--vermelho);
  color: var(--branco);
  box-shadow: 0 4px 0 var(--vermelho-escuro);
}

.btn--full {
  width: 100%;
  padding: 14px 24px;
  font-size: 18px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* === Inputs === */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-group label {
  font-weight: 700;
  font-size: 14px;
  color: var(--preto);
}

.input {
  padding: 12px 16px;
  border: 2px solid var(--cinza);
  border-radius: var(--radius-sm);
  font-family: 'Nunito', sans-serif;
  font-size: 16px;
  color: var(--preto);
  background: var(--branco);
  transition: border-color var(--transition);
  width: 100%;
}

.input:focus {
  outline: none;
  border-color: var(--verde);
}

.input--error {
  border-color: var(--vermelho);
}

.form-error {
  color: var(--vermelho);
  font-size: 13px;
  font-weight: 600;
  min-height: 20px;
}

/* === Cards === */
.card {
  background: var(--branco);
  border-radius: var(--radius);
  box-shadow: var(--sombra);
  padding: 20px;
}

.card--destaque {
  border: 2px solid var(--amarelo);
}

/* === Streak === */
.streak-card {
  background: linear-gradient(135deg, var(--amarelo) 0%, #ffb300 100%);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.streak-card__numero {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 56px;
  color: var(--preto);
  line-height: 1;
}

.streak-card__label {
  font-weight: 800;
  font-size: 14px;
  color: var(--preto);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.streak-card__sub {
  font-size: 13px;
  color: rgba(0,0,0,0.6);
  margin-top: 2px;
}

.streak-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

/* === XP Bar === */
.xp-bar-wrap {
  background: var(--cinza-claro);
  border-radius: var(--radius);
  padding: 16px 20px;
}

.xp-bar-wrap__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.xp-bar-wrap__titulo {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--cinza-medio);
}

.xp-bar-wrap__valor {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 22px;
  color: var(--azul);
}

.xp-bar {
  background: var(--cinza);
  border-radius: 99px;
  height: 12px;
  overflow: hidden;
}

.xp-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--azul) 0%, #1976d2 100%);
  border-radius: 99px;
  transition: width 0.6s ease;
}

/* === Grid de Materias === */
.materias-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.materia-card {
  background: var(--branco);
  border-radius: var(--radius);
  box-shadow: var(--sombra);
  padding: 16px;
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
  border: 2px solid transparent;
}

.materia-card:hover {
  box-shadow: var(--sombra-hover);
  transform: translateY(-2px);
  border-color: var(--verde);
}

.materia-card__nome {
  font-weight: 800;
  font-size: 15px;
  color: var(--preto);
  margin-bottom: 8px;
}

.materia-card__progresso {
  font-size: 12px;
  color: var(--cinza-medio);
  margin-bottom: 6px;
}

.materia-card__bar {
  background: var(--cinza);
  border-radius: 99px;
  height: 6px;
  overflow: hidden;
}

.materia-card__bar-fill {
  height: 100%;
  background: var(--verde);
  border-radius: 99px;
  transition: width 0.4s ease;
}

/* === Questao === */
.questao-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.questao-progresso {
  font-size: 13px;
  font-weight: 700;
  color: var(--cinza-medio);
}

.questao-materia {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 18px;
  color: var(--verde);
}

.questao-enunciado {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 24px;
  color: var(--preto);
}

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

.alternativa-btn {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--cinza);
  border-radius: var(--radius-sm);
  background: var(--branco);
  cursor: pointer;
  font-family: 'Nunito', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--preto);
  text-align: left;
  transition: border-color var(--transition), background var(--transition);
  width: 100%;
}

.alternativa-btn:hover:not(:disabled) {
  border-color: var(--azul);
  background: var(--azul-claro);
}

.alternativa-btn__letra {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  background: var(--cinza);
  border-radius: 50%;
  font-weight: 800;
  font-size: 13px;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}

.alternativa-btn--correta {
  border-color: var(--verde);
  background: #e8f8f0;
}

.alternativa-btn--correta .alternativa-btn__letra {
  background: var(--verde);
  color: var(--branco);
}

.alternativa-btn--errada {
  border-color: var(--vermelho);
  background: #ffeaea;
}

.alternativa-btn--errada .alternativa-btn__letra {
  background: var(--vermelho);
  color: var(--branco);
}

.alternativa-btn:disabled {
  cursor: default;
}

/* === Feedback XP === */
.feedback-xp {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  margin-top: 16px;
  font-weight: 700;
  font-size: 16px;
  animation: slideUp 0.3s ease;
}

.feedback-xp--acerto {
  background: #e8f8f0;
  color: #00783a;
  border: 2px solid var(--verde);
}

.feedback-xp--erro {
  background: #ffeaea;
  color: var(--vermelho-escuro);
  border: 2px solid var(--vermelho);
}

.feedback-xp__explicacao {
  font-size: 14px;
  font-weight: 600;
  color: var(--cinza-medio);
  margin-top: 8px;
  padding: 12px 16px;
  background: var(--cinza-claro);
  border-radius: var(--radius-sm);
}

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

/* === XP animado === */
.xp-popup {
  position: fixed;
  top: 70px;
  right: 20px;
  background: var(--amarelo);
  color: var(--preto);
  font-family: 'Bebas Neue', sans-serif;
  font-size: 28px;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  box-shadow: var(--sombra);
  z-index: 200;
  animation: xpAnim 1.2s ease forwards;
  pointer-events: none;
}

@keyframes xpAnim {
  0%   { opacity: 0; transform: translateY(0) scale(0.8); }
  20%  { opacity: 1; transform: translateY(-10px) scale(1.1); }
  80%  { opacity: 1; transform: translateY(-20px) scale(1); }
  100% { opacity: 0; transform: translateY(-40px) scale(0.9); }
}

/* === Ranking === */
.ranking-tabela {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
}

.ranking-tabela th {
  text-align: left;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--cinza-medio);
  padding: 8px 12px;
  border-bottom: 2px solid var(--cinza);
}

.ranking-tabela td {
  padding: 12px;
  border-bottom: 1px solid var(--cinza);
  font-weight: 600;
  font-size: 15px;
}

.ranking-tabela tr.eu td {
  background: var(--azul-claro);
  color: var(--azul);
  font-weight: 800;
}

.ranking-posicao {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 20px;
  color: var(--cinza-medio);
  min-width: 36px;
}

.ranking-posicao--1 { color: var(--amarelo); }
.ranking-posicao--2 { color: #9e9e9e; }
.ranking-posicao--3 { color: #8d5524; }

.ranking-xp {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 18px;
  color: var(--azul);
  text-align: right;
}

/* === Auth pages === */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cinza-claro);
  padding: 24px 16px;
}

.auth-card {
  background: var(--branco);
  border-radius: var(--radius);
  box-shadow: var(--sombra);
  padding: 32px 28px;
  width: 100%;
  max-width: 400px;
}

.auth-card__titulo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 36px;
  color: var(--verde);
  margin-bottom: 4px;
}

.auth-card__subtitulo {
  font-size: 14px;
  color: var(--cinza-medio);
  margin-bottom: 28px;
}

.auth-card__link {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--cinza-medio);
}

.auth-card__link a {
  color: var(--azul);
  font-weight: 700;
  text-decoration: none;
}

/* === Alerta === */
.alerta {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 16px;
  display: none;
}

.alerta--erro {
  background: #ffeaea;
  color: var(--vermelho-escuro);
  border: 2px solid var(--vermelho);
}

.alerta--sucesso {
  background: #e8f8f0;
  color: #00783a;
  border: 2px solid var(--verde);
}

.alerta.visivel {
  display: block;
}

/* === Loading === */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--cinza-medio);
  font-weight: 600;
}

/* === Espacamento === */
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }

/* === Responsivo === */
@media (max-width: 480px) {
  .materias-grid { grid-template-columns: 1fr; }
  .auth-card { padding: 24px 20px; }
}

/* === Dark Mode === */
[data-theme="dark"] {
  --branco: #121212;
  --preto: #e8e8e8;
  --cinza-claro: #1e1e1e;
  --cinza: #2e2e2e;
  --cinza-medio: #777;
  --sombra: 0 2px 12px rgba(0,0,0,0.4);
  --sombra-hover: 0 4px 20px rgba(0,0,0,0.6);
  --azul-claro: #0d1a2e;
}

[data-theme="dark"] body {
  background-color: #121212;
  color: #e8e8e8;
}

[data-theme="dark"] .navbar {
  background: #1a1a1a;
  border-bottom-color: #2e2e2e;
}

[data-theme="dark"] .card {
  background: #1e1e1e;
  border-color: #2e2e2e;
}

[data-theme="dark"] .alternativa-btn {
  background: #1e1e1e;
  border-color: #2e2e2e;
  color: #e8e8e8;
}

[data-theme="dark"] .alternativa-btn:hover {
  background: #2a2a2a;
}

[data-theme="dark"] .input {
  background: #1e1e1e;
  border-color: #2e2e2e;
  color: #e8e8e8;
}

[data-theme="dark"] .auth-card {
  background: #1e1e1e;
}

/* === App Sidebar (desktop) === */
.app-sidebar {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  width: 220px;
  height: calc(100vh - 56px);
  background: var(--branco);
  border-right: 1px solid var(--cinza);
  flex-direction: column;
  padding: 16px 12px;
  z-index: 90;
  overflow-y: auto;
}

.app-sidebar__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--cinza-medio);
  font-size: 14px;
  font-weight: 600;
  transition: background var(--transition), color var(--transition);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.app-sidebar__item:hover {
  background: var(--cinza-claro);
  color: var(--preto);
}

.app-sidebar__item--ativo {
  background: var(--cinza-claro);
  color: var(--verde);
}

.app-sidebar__item svg {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
}

/* === Bottom Nav (mobile) === */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--branco);
  border-top: 1px solid var(--cinza);
  z-index: 100;
  align-items: center;
  justify-content: space-around;
  padding: 0 8px;
}

.bottom-nav__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 2px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--cinza-medio);
  font-size: 9px;
  font-weight: 700;
  transition: color var(--transition);
  cursor: pointer;
  border: none;
  background: none;
  flex: 1;
}

.bottom-nav__item:hover,
.bottom-nav__item--ativo {
  color: var(--verde);
}

.bottom-nav__item svg {
  width: 22px;
  height: 22px;
}

/* === Auth UI melhorada === */
.auth-page {
  background: linear-gradient(160deg, #e0f5ea 0%, #f0f0f0 60%);
}

.auth-card {
  border-top: 4px solid var(--verde);
  max-width: 430px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 28px;
}

.auth-logo__img {
  display: block;
  width: 200px;
  height: auto;
  margin: 0 auto 12px;
}

.auth-logo__wordmark {
  display: block;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 44px;
  color: var(--verde);
  letter-spacing: 0.04em;
  line-height: 1;
}

.auth-logo__tagline {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--cinza-medio);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-top: 5px;
}

.input-wrapper {
  position: relative;
}

.input-wrapper > .input {
  padding-left: 44px;
}

.input-wrapper > .input.input--has-addon {
  padding-right: 44px;
}

.input-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--cinza-medio);
  pointer-events: none;
  display: flex;
  align-items: center;
}

.input-addon {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--cinza-medio);
  padding: 4px;
  display: flex;
  align-items: center;
  border-radius: 4px;
  transition: color var(--transition);
  line-height: 1;
}

.input-addon:hover {
  color: var(--preto);
}

.form-hint {
  font-size: 12px;
  color: var(--cinza-medio);
  font-weight: 600;
}

/* === Layout com nav === */
@media (min-width: 769px) {
  .has-app-nav .app-sidebar { display: flex; }
  .has-app-nav .container,
  .has-app-nav .container--wide {
    margin-left: 220px;
  }
}

@media (max-width: 768px) {
  .has-app-nav .bottom-nav { display: flex; }
  .has-app-nav .navbar { display: none; }
  .has-app-nav main {
    padding-bottom: 72px;
  }
}