/* --- CONFIGURAÇÕES GERAIS & VARIÁVEIS --- */
:root {
  --bg-color: #121212;
  --surface-color: #1e1e1e;
  --hover-color: #2c2c2c;
  --text-main: #ffffff;
  --text-secondary: #aaaaaa;
  --accent-color: #00d2ff;
  --border-color: #333333;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

::selection {
  background-color: var(--accent-color);
  color: var(--bg-color);
}

/* Scrollbar Personalizada */
::-webkit-scrollbar { 
  width: 8px; 
}

::-webkit-scrollbar-track { 
  background: var(--bg-color); 
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
  transition: var(--transition);

  &:hover {
    background: var(--accent-color);
    box-shadow: 0 0 8px var(--accent-color);
  }
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-color) radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px) 0 0 / 24px 24px;
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);

  &:hover {
    color: var(--accent-color);
    text-shadow: 0 0 8px rgba(0, 210, 255, 0.4);
  }
}

a, button, input, select {
  &:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
  }
}

/* --- HEADER PRINCIPAL --- */
body > header {
  background-color: rgba(30, 30, 30, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0 2rem;

  .header-container {
    max-width: 1360px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    width: 100%;

    @media (max-width: 768px) {
      flex-direction: column;
      gap: 1rem;
      text-align: center;
    }
  }

  .logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-main);
    letter-spacing: 0.5px;
  }

  nav {
    ul {
      display: flex;
      list-style: none;
      gap: 2rem;

      @media (max-width: 768px) {
        gap: 1.25rem;
        flex-wrap: wrap;
        justify-content: center;
      }
    }

    a {
      font-size: 0.95rem;
      color: var(--text-secondary);
      position: relative;
      padding-bottom: 4px;

      &:hover, &.active { color: var(--text-main); }

      &.active::after {
        content: '';
        position: absolute;
        bottom: -4px;
        left: 0;
        width: 100%;
        height: 2px;
        background-color: var(--accent-color);
        box-shadow: 0 0 8px var(--accent-color);
      }
    }
  }
}

/* --- HERO SECTION --- */
.hero {
  padding: 4rem 2rem;
  text-align: center;
  background: linear-gradient(180deg, rgba(30, 30, 30, 0.5) 0%, rgba(18, 18, 18, 0) 100%);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;

  h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    margin-bottom: 1rem;
    color: var(--text-main);
  }

  p {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 650px;
    margin: 0 auto 2rem;
  }

  strong { 
    color: var(--accent-color); 
  }

  .hero-cta .btn-link {
    font-size: 0.95rem;
    padding: 0.7rem 1.75rem;
  }
}

/* --- LAYOUTS, GRIDS & ANIMAÇÕES --- */
.container {
  max-width: 1400px;
  margin: 2rem auto;
  padding: 0 2rem;
  width: 100%;
  flex: 1;
}

.layout-with-sidebar {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2.5rem;

  @media (max-width: 1024px) { 
    grid-template-columns: 1fr; 
  }
}

.section-title {
  font-size: 1.5rem;
  margin: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;

  h2 {
    font-size: inherit;
    font-weight: inherit;
    color: inherit;
    margin: 0;
  }
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;

  @media (max-width: 1200px) { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  @media (max-width: 768px) { grid-template-columns: 1fr; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- COMPONENTES BASE DE SUPERFÍCIE --- */
.card, 
.empty-state, 
.sidebar-widget, 
.controls-bar, 
.course-meta-grid {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

/* --- CARDS & ESTADOS VAZIOS --- */
.card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  animation: fadeInUp 0.5s ease forwards;

  &:hover {
    transform: translateY(-4px);
    border-color: var(--accent-color);
    box-shadow: 0 6px 20px rgba(0, 210, 255, 0.15);

    .card-img-container img { 
      transform: scale(1.05); 
    }
  }

  .card-img-container {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    background-color: var(--hover-color);

    img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
  }

  .card-content {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    flex: 1;
  }

  h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
  }

  p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    flex: 1;
  }

  .card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;

    &.no-rating .btn-link { width: 100%; }
  }
}

.card-tags, .sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card-tags { 
  margin-bottom: 0.75rem; 
}

.tag {
  font-size: 0.75rem;
  background-color: var(--hover-color);
  color: var(--accent-color);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  border: 1px solid rgba(0, 210, 255, 0.2);
}

.stars {
  color: #f39c12;
  font-size: 0.9rem;
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-secondary);
  animation: fadeInUp 0.4s ease forwards;

  h3 {
    color: var(--text-main);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
  }
}

/* --- BOTÕES --- */
.btn-pill, .btn-link, .btn-primary, .btn-secondary {
  font-size: 0.85rem;
  transition: var(--transition);
  display: inline-block;
  font-weight: 600;
  text-align: center;
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 1rem;
  background-color: transparent;
  color: var(--accent-color);
  border: 1px solid var(--accent-color);
  border-radius: 50px;
  font-weight: 500;

  &:hover {
    background-color: var(--accent-color);
    color: var(--bg-color);
    box-shadow: 0 0 12px rgba(0, 210, 255, 0.5);
  }
}

.btn-link, .btn-primary {
  padding: 0.5rem 1rem;
  background-color: var(--accent-color);
  color: var(--bg-color);
  border-radius: 6px;
  border: 1px solid var(--accent-color);

  &:hover {
    background-color: transparent;
    color: var(--accent-color);
    box-shadow: 0 0 12px var(--accent-color);
    text-shadow: none;
  }
}

.btn-secondary {
  padding: 0.6rem 1.2rem;
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 6px;

  &:hover {
    background-color: var(--hover-color);
    border-color: var(--accent-color);
    color: var(--accent-color);
  }
}

/* --- BARRA DE CONTROLES E FILTROS --- */
.controls-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  padding: 1rem;
  justify-content: space-between;
  align-items: center;

  .search-input, .select-filter {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.6rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);

    &:focus {
      border-color: var(--accent-color);
      box-shadow: 0 0 8px rgba(0, 210, 255, 0.3);
    }
  }

  .search-input {
    flex: 1;
    min-width: 240px;
  }

  .filters-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
  }
}

/* --- SIDEBAR --- */
aside {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;

  .sidebar-widget {
    padding: 1.25rem;

    h3, h4 {
      font-size: 1rem;
      margin-bottom: 1rem;
      color: var(--text-main);
      border-left: 3px solid var(--accent-color);
      padding-left: 0.5rem;
    }
  }

  .sidebar-focus {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
  }

  .social-links, .secondary-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;

    a {
      padding: 0.5rem 0.75rem;
      background-color: var(--bg-color);
      border-radius: 6px;
      border: 1px solid var(--border-color);
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      transition: var(--transition);

      &:hover {
        transform: translateX(6px);
        border-color: var(--accent-color);
        color: var(--accent-color);
      }
    }
  }
}

/* --- PÁGINA ABOUT --- */
.about-profile, .about-section {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 12px;
  margin-bottom: 2rem;
}

.about-profile {
  display: flex;
  gap: 2.5rem;
  align-items: center;

  @media (max-width: 768px) {
    flex-direction: column;
    text-align: center;
  }

  .profile-avatar {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-color);
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.3);
  }

  .profile-info {
    h1 {
      font-size: clamp(1.5rem, 2.5vw, 2.5rem);
      margin-bottom: 0.25rem;
    }

    p.role {
      color: var(--accent-color);
      font-weight: 500;
      margin-bottom: 0.5rem;
    }

    p.location {
      color: var(--text-secondary);
      font-size: 0.9rem;
    }
  }
}

.about-section h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--accent-color);
}

/* --- TOOLTIP --- */
.tooltip {
  position: relative;
  cursor: pointer;

  &::after, &::before {
    position: absolute;
    left: 50%;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    pointer-events: none;
  }

  &::after {
    content: attr(data-tooltip);
    bottom: 135%;
    transform: translateX(-50%) translateY(6px);
    background-color: var(--surface-color);
    color: var(--text-main);
    border: 1px solid var(--accent-color);
    box-shadow: 0 0 12px rgba(0, 210, 255, 0.25);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
  }

  &::before {
    content: '';
    bottom: 115%;
    transform: translateX(-50%) translateY(6px);
    border: 5px solid transparent;
    border-top-color: var(--accent-color);
  }

  &:hover::after, &:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
}

/* --- DETALHES DO CURSO & MÍDIA --- */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;

  a {
    color: var(--text-secondary);
    &:hover { color: var(--accent-color); }
  }
}

.course-header { 
  margin-bottom: 2rem; 
}

.course-banner {
  width: 100%;
  max-height: 100%;
  overflow: hidden;
  border-radius: 8px;
  margin-bottom: 1.5rem;

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

.course-lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.course-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  padding: 1.25rem;
  margin-bottom: 2rem;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.meta-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.meta-value { 
  font-weight: 600; 
}

.progress-bar-container {
  width: 100%;
  height: 8px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 4px;
}

.progress-bar {
  height: 100%;
  background-color: var(--accent-color);
  border-radius: 4px;
}

.course-section {
  margin-bottom: 2rem;

  h2 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
  }
}

/* Container de mídia responsiva (Vídeos YouTube / Vídeos locais / Imagens) */
.course-media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  margin: 1rem 0 1.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: var(--transition);

  &:hover {
    border-color: rgba(0, 210, 255, 0.4);
  }

  iframe, video, img {
    width: 100%;
    height: 100%;
    display: block;
  }

  iframe, video {
    border: none;
  }

  img {
    object-fit: cover;
  }
}

.styled-list {
  padding-left: 1.25rem;
  line-height: 1.7;
}

.course-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

/* --- MODIFICADORES AUXILIARES --- */
.title-no-border {
  border: none;
  margin-bottom: 1rem;
}

.cards-grid-2cols {
  grid-template-columns: repeat(2, minmax(0, 1fr));

  @media (max-width: 768px) { 
    grid-template-columns: 1fr; 
  }
}

/* --- FOOTER --- */
footer {
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  text-align: center;
  padding: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: auto;

  a {
    color: var(--accent-color);
    font-weight: 500;
    position: relative;
    padding-bottom: 2px;

    &::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent-color);
      box-shadow: 0 0 8px var(--accent-color);
      transition: width 0.3s ease;
    }

    &:hover::after { 
      width: 100%; 
    }
  }
}