/**
 * 📚 BotEnSky Principes Page Styles
 * Sticky TOC, scroll-spy, function cards
 */

/* ========================================
   📐 LAYOUT (Desktop: Sidebar + Content)
   ======================================== */

.bes-principes-container {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--bes-space-8);
  align-items: start;
  position: relative;
}

@media (max-width: 1024px) {
  .bes-principes-container {
    grid-template-columns: 1fr;
    gap: var(--bes-space-6);
  }
}

/* ========================================
   📑 TABLE OF CONTENTS (Sticky Sidebar)
   ======================================== */

.bes-toc {
  position: sticky;
  top: 90px; /* Header height (70px) + margin (20px) */
  max-height: calc(100vh - 110px); /* 90px top + 20px bottom margin */
  overflow-y: auto;
  padding: var(--bes-space-6);
  background: var(--bes-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bes-border-light);
  border-radius: var(--bes-radius-xl);
  box-shadow: var(--bes-shadow-md);
  animation: fadeInLeft var(--bes-duration-slow) var(--bes-ease-bounce);
  align-self: start; /* Important pour sticky dans grid */
}

.bes-toc-title {
  font-size: var(--bes-text-lg);
  font-weight: var(--bes-font-bold);
  color: var(--bes-text-primary);
  margin-bottom: var(--bes-space-4);
  display: flex;
  align-items: center;
  gap: var(--bes-space-2);
}

.bes-toc-title i {
  width: 20px;
  height: 20px;
  color: var(--bes-primary);
}

.bes-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--bes-space-2);
}

.bes-toc-link {
  display: flex;
  align-items: center;
  gap: var(--bes-space-2);
  padding: var(--bes-space-2) var(--bes-space-3);
  font-size: var(--bes-text-sm);
  font-weight: var(--bes-font-medium);
  color: var(--bes-text-secondary);
  text-decoration: none;
  border-radius: var(--bes-radius-base);
  border-left: 3px solid transparent;
  transition: var(--bes-transition-fast);
  position: relative;
}

.bes-toc-link:hover {
  color: var(--bes-primary);
  background: rgba(var(--bes-primary-rgb), 0.08);
  border-left-color: var(--bes-primary);
  text-decoration: none;
  transform: translateX(4px);
}

.bes-toc-link.active {
  color: var(--bes-primary);
  background: rgba(var(--bes-primary-rgb), 0.15);
  border-left-color: var(--bes-primary);
  font-weight: var(--bes-font-semibold);
}

.bes-toc-link i {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

/* Custom scrollbar for TOC */
.bes-toc::-webkit-scrollbar {
  width: 6px;
}

.bes-toc::-webkit-scrollbar-thumb {
  background: var(--bes-primary);
  border-radius: 3px;
}

/* Mobile TOC (collapsible) */
@media (max-width: 1024px) {
  .bes-toc {
    position: relative;
    top: 0;
    max-height: none;
  }
}

/* ========================================
   📄 MAIN CONTENT
   ======================================== */

.bes-principes-content {
  min-width: 0; /* Fix grid overflow */
}

.bes-principes-header {
  margin-bottom: var(--bes-space-8);
  animation: fadeInUp var(--bes-duration-slow) var(--bes-ease-bounce);
}

.bes-principes-title {
  font-size: var(--bes-text-5xl);
  margin-bottom: var(--bes-space-4);
  background: linear-gradient(
    135deg,
    var(--bes-primary) 0%,
    var(--bes-accent) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   🎴 FUNCTION CARDS
   ======================================== */

.bes-function-section {
  margin-bottom: var(--bes-space-12);
  scroll-margin-top: 100px; /* Offset for sticky header */
  animation: fadeInUp var(--bes-duration-slow) var(--bes-ease-bounce);
}

.bes-function-card {
  padding: var(--bes-space-8);
  background: var(--bes-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bes-border-light);
  border-radius: var(--bes-radius-2xl);
  box-shadow: var(--bes-shadow-md);
  transition: var(--bes-transition-base);
  position: relative;
  overflow: hidden;
}

.bes-function-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--bes-primary) 0%,
    var(--bes-accent) 50%,
    var(--bes-secondary) 100%
  );
}

.bes-function-card:hover {
  background: var(--bes-surface-hover);
  border-color: var(--bes-primary);
  box-shadow: var(--bes-shadow-xl);
  transform: translateY(-4px);
}

.bes-function-header {
  display: flex;
  align-items: center;
  gap: var(--bes-space-4);
  margin-bottom: var(--bes-space-6);
  flex-wrap: wrap;
}

.bes-function-icon {
  width: 56px;
  height: 56px;
  padding: var(--bes-space-3);
  background: rgba(var(--bes-primary-rgb), 0.1);
  border-radius: var(--bes-radius-lg);
  color: var(--bes-primary);
  stroke-width: 2;
}

.bes-function-title {
  flex: 1;
  font-size: var(--bes-text-3xl);
  font-weight: var(--bes-font-bold);
  color: var(--bes-text-primary);
  margin: 0;
}

.bes-function-hashtag {
  display: inline-flex;
  align-items: center;
  gap: var(--bes-space-2);
  padding: var(--bes-space-2) var(--bes-space-4);
  font-size: var(--bes-text-sm);
  font-weight: var(--bes-font-semibold);
  color: var(--bes-primary);
  background: rgba(var(--bes-primary-rgb), 0.1);
  border: 1px solid rgba(var(--bes-primary-rgb), 0.3);
  border-radius: var(--bes-radius-full);
  text-decoration: none;
  transition: var(--bes-transition-fast);
}

.bes-function-hashtag:hover {
  background: rgba(var(--bes-primary-rgb), 0.2);
  border-color: var(--bes-primary);
  transform: scale(1.05);
  text-decoration: none;
}

.bes-function-hashtag i {
  width: 14px;
  height: 14px;
}

.bes-function-description {
  font-size: var(--bes-text-base);
  color: var(--bes-text-secondary);
  line-height: var(--bes-leading-relaxed);
  margin-bottom: var(--bes-space-6);
}

.bes-function-description strong {
  color: var(--bes-text-primary);
  font-weight: var(--bes-font-semibold);
}

/* Example section */
.bes-function-example-title {
  font-size: var(--bes-text-lg);
  font-weight: var(--bes-font-semibold);
  color: var(--bes-text-primary);
  margin-bottom: var(--bes-space-4);
  display: flex;
  align-items: center;
  gap: var(--bes-space-2);
}

.bes-function-example-title i {
  width: 18px;
  height: 18px;
  color: var(--bes-accent);
}

/* Bluesky Embed Wrapper */
.bes-bluesky-embed-wrapper {
  padding: var(--bes-space-4);
  background: rgba(var(--bes-accent-rgb), 0.05);
  border: 1px solid rgba(var(--bes-accent-rgb), 0.2);
  border-radius: var(--bes-radius-lg);
  margin-bottom: var(--bes-space-4);
}

.bluesky-embed {
  margin: 0 !important;
  border-radius: var(--bes-radius-md) !important;
}

/* ========================================
   🔝 BACK TO TOP BUTTON
   ======================================== */

.bes-back-to-top {
  position: fixed;
  bottom: var(--bes-space-6);
  right: var(--bes-space-6);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bes-primary);
  color: var(--bes-text-inverse);
  border: none;
  border-radius: var(--bes-radius-full);
  box-shadow: var(--bes-shadow-lg);
  cursor: pointer;
  transition: var(--bes-transition-base);
  z-index: var(--bes-z-fixed);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.bes-back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.bes-back-to-top:hover {
  background: var(--bes-primary-dark);
  box-shadow: var(--bes-shadow-xl);
  transform: translateY(-4px);
}

.bes-back-to-top i {
  width: 24px;
  height: 24px;
  stroke-width: 2.5;
}

/* Progress circle */
.bes-back-to-top-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.bes-back-to-top-progress circle {
  fill: none;
  stroke: var(--bes-accent);
  stroke-width: 3;
  stroke-dasharray: 170;
  stroke-dashoffset: 170;
  transition: stroke-dashoffset 0.3s;
}

/* ========================================
   📦 PROJECT INFO CARD
   ======================================== */

.bes-project-card {
  margin-top: var(--bes-space-12);
  padding: var(--bes-space-8);
  background: var(--bes-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bes-border-light);
  border-radius: var(--bes-radius-2xl);
  box-shadow: var(--bes-shadow-md);
}

.bes-project-title {
  font-size: var(--bes-text-2xl);
  font-weight: var(--bes-font-bold);
  color: var(--bes-text-primary);
  margin-bottom: var(--bes-space-5);
  display: flex;
  align-items: center;
  gap: var(--bes-space-3);
}

.bes-project-title i {
  width: 28px;
  height: 28px;
  color: var(--bes-primary);
}

.bes-project-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--bes-space-3);
}

.bes-project-list li {
  display: flex;
  align-items: start;
  gap: var(--bes-space-3);
  font-size: var(--bes-text-base);
  color: var(--bes-text-secondary);
  line-height: var(--bes-leading-relaxed);
}

.bes-project-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--bes-primary);
  border-radius: 50%;
  margin-top: 10px;
  flex-shrink: 0;
}

.bes-project-list a {
  color: var(--bes-primary);
  font-weight: var(--bes-font-semibold);
  transition: var(--bes-transition-fast);
}

.bes-project-list a:hover {
  color: var(--bes-accent);
  text-decoration: underline;
}

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

@media (max-width: 768px) {
  .bes-principes-title {
    font-size: var(--bes-text-3xl);
  }

  .bes-function-card {
    padding: var(--bes-space-6);
  }

  .bes-function-title {
    font-size: var(--bes-text-2xl);
  }

  .bes-function-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .bes-back-to-top {
    bottom: var(--bes-space-4);
    right: var(--bes-space-4);
    width: 48px;
    height: 48px;
  }

  .bes-back-to-top i {
    width: 20px;
    height: 20px;
  }
}

@media (max-width: 480px) {
  .bes-function-section {
    margin-bottom: var(--bes-space-8);
  }

  .bes-project-card {
    padding: var(--bes-space-6);
  }
}