/* --- Polices & Variables --- */
:root {
  --font-header: "Poppins", sans-serif;
  --font-body: "Roboto Slab", serif;
  --color-bg: #0d1b2a;
  --color-bg-rgb: 13, 27, 42;
  --color-surface: #1b263b;
  --color-text: #e0e1dd;
  --color-text-muted: #778da9;
  --color-accent: #ff7f51;
  --color-highlight: #ff7f51;
  --radius: 12px;
  --card-height: 170px;
  --card-width: 280px;
  --card-spacing: 15px;
}

/* --- Styles Généraux --- */
body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-header);
  margin: 0;
  font-weight: 700;
}

/* --- Header & Footer --- */
.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 3rem;
  position: fixed;
  width: 100%;
  box-sizing: border-box;
  top: 0;
  z-index: 100;
  background: linear-gradient(
    180deg,
    rgba(var(--color-bg-rgb), 0.95),
    rgba(var(--color-bg-rgb), 0)
  );
  pointer-events: none;
}
.main-header > * {
  pointer-events: auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-header);
  font-size: 1.5rem;
  font-weight: 700;
}
.logo img {
  height: 28px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--font-header);
  font-weight: 500;
}
.main-nav a:hover {
  color: var(--color-highlight);
}
.button {
  background-color: var(--color-highlight);
  color: var(--color-text);
  padding: 10px 20px;
  border-radius: var(--radius);
  transition: transform 0.2s;
}
.button:hover {
    transform: scale(1.05);
    background-color: var(--color-text);
    color: var(--color-highlight);
}

.main-footer {
  padding: 2rem 3rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.footer-links {
  margin-top: 0.5rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}
.footer-links a {
  color: var(--color-text-muted);
}
.footer-links a:hover {
  color: var(--color-text);
}

/* --- Contenu Principal --- */
.site-content {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  padding: 6rem 2rem 2rem 2rem;
  box-sizing: border-box;
}

.breadcrumb {
  width: 100%;
  max-width: 1800px;
  text-align: left;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-family: var(--font-header);
  padding: 0 1rem;
}

.hero-banner {
  width: 100%;
  max-width: 1800px;
  margin-bottom: 4rem;
  padding: 4rem 3rem;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  position: relative;
  box-sizing: border-box;
}
.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(26, 26, 46, 0.8) 20%,
    rgba(26, 26, 46, 0) 80%
  );
  border-radius: var(--radius);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 500px;
}
.hero-content h1 {
  font-size: 3rem;
  color: white;
}
.hero-content p {
  font-size: 1.2rem;
  color: var(--color-text-muted);
}

/* --- Le Système de Piles de Cartes --- */
.stacks-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4rem;
  perspective: 1500px;
  max-width: 1800px;
  width: 100%;
  padding: 0 1rem;
  box-sizing: border-box;
}

.card-stack {
  position: relative;
  cursor: pointer;
  z-index: 1;
  transition: margin-bottom 0.5s ease;
}
.card-stack:hover {
  z-index: 2;
}

.stack-title {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 1rem;
  font-size: 1.2rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  white-space: nowrap;
  transition: color 0.3s;
}

.card-stack:hover .stack-title {
  color: white;
}

.cards {
  position: relative;
  width: var(--card-width);
  height: var(--card-height);
  transform-style: preserve-3d;
  transform: rotateX(60deg) rotateY(0deg) rotateZ(-30deg);
  transition: transform 0.5s ease, height 0.5s ease;
}

.card-stack:hover .cards {
  transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg);
  /* CORRECTION : Hauteur pour 6 cartes */
  height: calc(var(--card-height) * 6 + var(--card-spacing) * 5);
}

.card {
  position: absolute;
  width: 100%;
  height: var(--card-height);
  background: linear-gradient(
    135deg,
    var(--color-surface),
    var(--color-accent)
  );
  border: 1px solid rgba(224, 251, 252, 0.2);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: transform 0.5s ease;
  overflow: hidden;
  left: 0;
}

.card h4 {
  font-size: 1.4rem;
  line-height: 1.4;
  color: white;
}
.card .card-meta {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

/* CORRECTION : Positionnement initial pour 6 cartes avec :nth-child */
.cards .card:nth-child(1) {
  transform: translateZ(0px);
  z-index: 6;
}
.cards .card:nth-child(2) {
  transform: translateZ(-10px);
  z-index: 5;
}
.cards .card:nth-child(3) {
  transform: translateZ(-20px);
  z-index: 4;
}
.cards .card:nth-child(4) {
  transform: translateZ(-30px);
  z-index: 3;
}
.cards .card:nth-child(5) {
  transform: translateZ(-40px);
  z-index: 2;
}
.cards .card:nth-child(6) {
  transform: translateZ(-50px);
  z-index: 1;
}

/* CORRECTION : Déploiement pour 6 cartes avec :nth-child */
.card-stack:hover .cards .card:nth-child(1) {
  transform: translateY(0);
}
.card-stack:hover .cards .card:nth-child(2) {
  transform: translateY(calc(var(--card-height) + var(--card-spacing)));
}
.card-stack:hover .cards .card:nth-child(3) {
  transform: translateY(calc(var(--card-height) * 2 + var(--card-spacing) * 2));
}
.card-stack:hover .cards .card:nth-child(4) {
  transform: translateY(calc(var(--card-height) * 3 + var(--card-spacing) * 3));
}
.card-stack:hover .cards .card:nth-child(5) {
  transform: translateY(calc(var(--card-height) * 4 + var(--card-spacing) * 4));
}
.card-stack:hover .cards .card:nth-child(6) {
  transform: translateY(calc(var(--card-height) * 5 + var(--card-spacing) * 5));
}

.card:hover {
  border-color: var(--color-highlight);
  transform: var(--card-transform, translateY(0)) scale(1.05);
  z-index: 10;
}

/* CORRECTION : Variables de transformation pour 6 cartes avec :nth-child */
.card-stack:hover .cards .card:nth-child(1) {
  --card-transform: translateY(0);
}
.card-stack:hover .cards .card:nth-child(2) {
  --card-transform: translateY(calc(var(--card-height) + var(--card-spacing)));
}
.card-stack:hover .cards .card:nth-child(3) {
  --card-transform: translateY(
    calc(var(--card-height) * 2 + var(--card-spacing) * 2)
  );
}
.card-stack:hover .cards .card:nth-child(4) {
  --card-transform: translateY(
    calc(var(--card-height) * 3 + var(--card-spacing) * 3)
  );
}
.card-stack:hover .cards .card:nth-child(5) {
  --card-transform: translateY(
    calc(var(--card-height) * 4 + var(--card-spacing) * 4)
  );
}
.card-stack:hover .cards .card:nth-child(6) {
  --card-transform: translateY(
    calc(var(--card-height) * 5 + var(--card-spacing) * 5)
  );
}

.card-view-all {
  background: var(--color-highlight);
  align-items: center;
  font-family: var(--font-header);
  font-size: 1.5rem;
  color: white;
}

.post-body a {
  color: var(--color-highlight);
  text-decoration: underline;
  font-weight: bold;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 4rem;
  font-family: var(--font-header);
}
.page-link {
  color: var(--color-text-muted);
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: all 0.2s;
}
.page-link:hover {
  color: var(--color-text);
  background-color: var(--color-surface);
}
.page-link.active {
  background-color: var(--color-highlight);
  color: white;
  font-weight: bold;
}

/* --- Responsive --- */
@media (max-width: 1200px) {
  .stacks-container {
    flex-direction: column;
    align-items: center;
    gap: 8rem;
  }
  .card-stack:hover {
    margin-bottom: 0;
  }
  .hero-content h1 {
    font-size: 2.5rem;
  }
}

@media (max-width: 768px) {
  .main-header {
    padding: 1rem 1.5rem;
  }
  .logo span {
    display: none;
  }
}

/* --- Styles pour les Pages Internes --- */

.page-header {
  width: 100%;
  max-width: 1200px;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-surface);
  text-align: left;
}

.page-header h1 {
  font-size: 2.8rem;
  color: white;
}

.content-card {
  width: 100%;
  max-width: 1200px;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  padding: 2rem;
  box-sizing: border-box;
  margin-bottom: 2rem;
}

.item-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.category-item, .thread-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-accent);
}

.item-list li:last-child {
  border-bottom: none;
}

.item-info h3 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}
.item-info h3 a:hover {
  color: var(--color-highlight);
}

.item-meta {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.author-link {
  color: var(--color-text);
  font-weight: bold;
}
.author-link:hover {
  text-decoration: underline;
  color: var(--color-highlight);
}

.item-stats {
  font-family: var(--font-header);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
  margin-left: 2rem;
}

/* --- Pages de Formulaires (login, register) --- */
.form-container {
  max-width: 500px;
  width: 100%;
  background-color: var(--color-surface);
  padding: 2rem 3rem;
  border-radius: var(--radius);
  box-sizing: border-box;
}
.form-container h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
  color: white;
}
.form-group {
  margin-bottom: 1.5rem;
}
.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
  font-family: var(--font-header);
}
.form-input {
  width: 100%;
  padding: 12px 15px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 1rem;
  box-sizing: border-box;
  transition: border-color 0.2s;
}
.form-input:focus {
  outline: none;
  border-color: var(--color-highlight);
}
.form-button {
  width: 100%;
  padding: 15px;
  font-size: 1.1rem;
  margin-top: 1rem;
}

/* --- Page de Thread --- */
.post-list {
  width: 100%;
  max-width: 1200px;
}
.post-item {
  display: flex;
  gap: 2rem;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
}
.post-author {
  flex-shrink: 0;
  width: 150px;
  text-align: center;
}
.avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin-bottom: 1rem;
  border: 2px solid var(--color-accent);
}
.author-name {
  font-family: var(--font-header);
  font-weight: bold;
  font-size: 1.2rem;
  display: block;
}
.author-name:hover {
    color: var(--color-highlight);
}
.author-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.post-content {
  flex-grow: 1;
}
.post-date {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 1rem;
}
.post-body {
  font-size: 1.1rem;
  line-height: 1.7;
}
.post-body p {
  margin: 0 0 1rem 0;
}
.post-body a {
  color: var(--color-highlight);
  text-decoration: underline;
  font-weight: bold;
}

/* --- Page de Profil --- */
.profile-header {
  width: 100%;
  max-width: 1200px;
  display: flex;
  align-items: center;
  gap: 2rem;
  background-color: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius);
  margin-bottom: 2rem;
  box-sizing: border-box;
}
.profile-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 3px solid var(--color-highlight);
}
.profile-info h1 {
  font-size: 2.5rem;
  color: white;
}
.profile-meta {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}
.profile-grid {
  width: 100%;
  max-width: 1200px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  align-items: start;
}
.card-title {
  font-size: 1.5rem;
  color: white;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-accent);
}
.thread-item-condensed {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-accent);
}
.reply-excerpt {
  margin-top: 0.5rem;
  padding-left: 1rem;
  border-left: 3px solid var(--color-accent);
  color: var(--color-text-muted);
}
.info-list {
  list-style: none;
  padding: 0;
  margin: 0;
  line-height: 2;
}

/* .forum-item {
    display: grid;
    grid-template-columns: 48px minmax(0, 3fr) minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1.5fr);
    gap: 16px;
    align-items: center;
    padding: 16px;
}

.forum-item:first-of-type {
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}
.forum-item:last-of-type {
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
    margin-bottom: 0;
}
.forum-item:only-of-type {
    border-radius: 8px;
} */

.forum-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: block;
}

/* .forum-subject {
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    line-height: 1.4;
}
.forum-subject:hover {
    text-decoration: underline;
}

.forum-author,
.forum-messages,
.forum-last-message {
    font-size: 0.9rem;
}

.forum-author a {
    font-weight: 600;
    text-decoration: none;
}
.forum-author a:hover {
    text-decoration: underline;
}

.forum-messages {
    text-align: center;
}

.forum-last-message {
    text-align: right;
    white-space: nowrap;
} */