@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&display=swap');

:root {
    --font-primary: 'DM Sans', sans-serif;
    --color-background: #FFFFFF;
    --color-surface: #FBF5FF;
    --color-text-primary: #2C2A3A;
    --color-text-secondary: #747287;
    --color-accent: #8B5CF6;
    --color-border: #F3EBFE;
    --radius: 8px;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  line-height: 1.6;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  /* On crée l'espace pour la sidebar fixe à gauche */
  padding-left: 280px; 
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
a:hover {
  color: var(--color-accent);
}

/* --- HEADER DEVENU SIDEBAR (Gauche) --- */
/* Transformation du header horizontal en colonne verticale fixe */
.main-header {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 280px;
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  z-index: 1000;
  box-sizing: border-box;
  overflow-y: auto;
}

/* Le fil d'ariane devient le menu de navigation principal */
.breadcrumb {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: auto; /* Pousse le reste vers le bas */
  font-size: 1.1rem;
}

.breadcrumb-item {
  display: block;
  font-weight: 700;
  padding: 8px 0;
}

/* On cache les séparateurs ">" car le menu est vertical */
.breadcrumb-separator {
  display: none;
}

/* Zone de connexion/inscription en bas de sidebar */
.user-actions {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
}

.user-actions a {
  display: block;
  text-align: center;
}

.button {
  background-color: var(--color-accent);
  color: #ffffff !important;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
}
.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* --- CONTENU PRINCIPAL (Droite) --- */

/* Ciblage des sections principales pour les centrer dans l'espace restant */
.hero-banner,
.feed,
.thread-main-header,
.post-list,
.profile-main-header,
.form-container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 40px;
  box-sizing: border-box;
}

.hero-banner {
  height: 220px;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  /* Dégradé subtil pour habiller si vide */
  background-image: linear-gradient(135deg, var(--color-surface), var(--color-border));
  margin-bottom: 32px;
  margin-top: 32px;
}

/* --- ACCUEIL (Forum List) --- */

.feed-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-border);
}

.forum-section {
  margin-bottom: 48px;
}

.forum-header {
  font-size: 1.5rem;
  margin-bottom: 16px;
  display: inline-block;
}

/* Grille des sujets */
.forum-item {
  display: grid;
  /* Avatar | Sujet | Auteur | Nb Messages | Date */
  grid-template-columns: 50px 1fr 140px 110px 180px;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  margin-bottom: 12px;
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}

.forum-item:hover {
  border-color: var(--color-accent);
  transform: translateX(5px);
}

.forum-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--color-border);
}

.forum-subject {
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.3;
}

.forum-author {
  font-size: 0.9rem;
  font-weight: 500;
}
.forum-author a { font-weight: 700; }

.forum-messages {
  font-size: 0.85rem;
  background-color: var(--color-background);
  color: var(--color-text-secondary);
  padding: 4px 12px;
  border-radius: 12px;
  text-align: center;
}

.forum-last-message {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-align: right;
}

/* --- PAGE SUJET (Thread) --- */

.thread-main-header {
  margin-top: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.thread-main-header h1 {
  font-size: 2.2rem;
  margin-bottom: 16px;
  line-height: 1.2;
}

.thread-meta {
  color: var(--color-text-secondary);
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.post {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 32px;
  background-color: var(--color-surface);
  padding: 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.post-author {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border-right: 1px solid var(--color-border);
  padding-right: 24px;
}

.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin-bottom: 12px;
  object-fit: cover;
  border: 3px solid var(--color-background);
}

.author-name {
  font-weight: 700;
  font-size: 1.1rem;
  word-break: break-word;
}

.author-meta {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  background: var(--color-border);
  padding: 2px 8px;
  border-radius: 4px;
}

.post-body {
  font-size: 1rem;
}
.post-body p {
  margin-bottom: 1em;
}

/* --- PAGE PROFIL USER --- */

.profile-main-header {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--color-border);
}

.profile-avatar-large {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 4px solid var(--color-surface);
  box-shadow: 0 0 0 1px var(--color-border);
  object-fit: cover;
}

.profile-info .page-main-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0 0 8px 0;
}

/* Activité récente (Utilisation des classes identifiées dans le DOM) */
.comment-date {
  font-size: 0.8rem;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--color-accent);
  margin-top: 24px;
  margin-bottom: 4px;
}

.comment-thread-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 12px 0;
}

.comment {
  background-color: var(--color-surface);
  padding: 16px;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-accent);
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: 24px;
}

/* --- FORMULAIRES (Login/Register) --- */
.form-container {
    max-width: 480px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-top: 64px;
}
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 700; }
.form-input {
    width: 100%;
    padding: 12px;
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text-primary);
    box-sizing: border-box;
}
.form-input:focus { outline: none; border-color: var(--color-accent); }
.form-switch-link { text-align: center; margin-top: 24px; }
.form-switch-link a { text-decoration: underline; color: var(--color-accent); }

/* --- FOOTER --- */
.footer {
  margin-top: auto;
  padding: 32px;
  border-top: 1px solid var(--color-border);
  text-align: center;
}
.sidebar-footer {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}
.sidebar-footer a {
  margin-left: 16px;
  color: var(--color-text-secondary);
}

/* --- RESPONSIVE MOBILE --- */
@media (max-width: 900px) {
  /* On annule la sidebar fixe pour passer en mode "Header classique" */
  body {
    padding-left: 0;
  }

  .main-header {
    position: relative;
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    overflow-y: visible;
  }

  .breadcrumb {
    flex-direction: row; /* Retour à l'horizontale */
    margin-bottom: 0;
    align-items: center;
  }
  
  .breadcrumb-separator {
    display: inline-block; /* Réapparition des séparateurs */
    margin: 0 8px;
  }

  .user-actions {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    flex-direction: row;
    align-items: center;
  }
  
  .user-actions a:not(.button) {
      display: none; /* On cache "Connexion" texte pour gagner de la place si besoin */
  }

  /* Adaptation des grilles */
  .forum-item {
    grid-template-columns: 50px 1fr;
    gap: 8px;
  }
  .forum-author, .forum-messages, .forum-last-message {
    grid-column: 2;
    text-align: left;
  }
  .forum-avatar { grid-row: 1 / 4; }

  .post {
    grid-template-columns: 1fr;
  }
  .post-author {
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding-right: 0;
    padding-bottom: 16px;
    margin-bottom: 16px;
    gap: 16px;
    width: 100%;
  }
  .author-avatar { margin-bottom: 0; width: 60px; height: 60px; }
  
  .hero-banner, .feed, .thread-main-header, .post-list, .profile-main-header, .form-container {
      padding: 20px;
  }
}