/* === DASHBOARD LAYOUT — Korean Minimal === */
/* Shared styles for all dashboard pages — extends main.css variables */

/* === DASHBOARD LAYOUT === */
.dashboard-wrap {
  display: flex;
  min-height: 100vh;
}

/* === SIDEBAR === */
.sidebar {
  width: 240px;
  background: var(--white);
  border-right: 1px solid var(--border);
  padding: 2rem 0;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 50;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
}

.sidebar-logo {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  text-decoration: none;
  color: var(--text);
  padding: 0 1.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: block;
}

.sidebar-nav {
  flex: 1;
  padding: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1.5rem;
  text-decoration: none;
  color: var(--text-light);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  transition: all var(--transition);
  border-left: 2px solid transparent;
  font-weight: 300;
}

.sidebar-link:hover,
.sidebar-link.active {
  color: var(--text);
  background: var(--bg-alt);
  border-left-color: var(--accent-dark);
}

.sidebar-link .icon {
  font-size: 1rem;
  width: 1.25rem;
  text-align: center;
  opacity: 0.6;
}

.sidebar-bottom {
  padding: 1.5rem;
  border-top: 1px solid var(--border);
}

.sidebar-user {
  font-size: 0.8rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-user .avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--white);
  font-weight: 500;
}

.sidebar-logout {
  font-size: 0.75rem;
  color: var(--text-light);
  text-decoration: none;
  margin-left: auto;
  transition: color var(--transition);
}

.sidebar-logout:hover { color: var(--text); }

/* === MAIN CONTENT === */
.main-content {
  flex: 1;
  margin-left: 240px;
  padding: 2rem 3rem;
  min-height: 100vh;
}

.page-header {
  margin-bottom: 2.5rem;
}

.page-title {
  font-size: 1.8rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.page-subtitle {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 300;
}

/* === CARDS === */
.card-dash {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 1.5rem 2rem;
  transition: transform var(--transition);
}

.card-dash:hover { transform: translateY(-2px); }

.card-dash-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.card-dash-value {
  font-size: 1.1rem;
  color: var(--text);
  font-weight: 400;
}

.card-dash-label {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 0.25rem;
}

/* === DASHBOARD GRID === */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.dashboard-grid .full-width {
  grid-column: 1 / -1;
}

/* === PROGRESS BARS === */
.progress-bar-wrap {
  width: 100%;
  height: 6px;
  background: var(--bg-alt);
  border-radius: 3px;
  overflow: hidden;
  margin: 0.5rem 0;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-dark);
  border-radius: 3px;
  transition: width 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.progress-bar-text {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-light);
}

/* === CHAPTERS LIST === */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.chapter-card {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 1.5rem;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.chapter-card:hover { transform: translateY(-2px); border-color: var(--accent-dark); }
.chapter-card.locked { opacity: 0.5; cursor: default; }
.chapter-card.locked:hover { transform: none; border-color: var(--border); }

.chapter-num {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--accent-dark);
  margin-bottom: 0.4rem;
}

.chapter-card h4 {
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.chapter-status {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  font-weight: 400;
}

.chapter-status.locked { background: var(--bg-alt); color: var(--text-light); }
.chapter-status.unlocked { background: #e8f0fe; color: #1a73e8; }
.chapter-status.in-progress { background: #fff8e1; color: #b8860b; }
.chapter-status.completed { background: #e8f5e9; color: #2e7d32; }

.chapter-progress {
  margin-top: 0.75rem;
  height: 3px;
  background: var(--bg-alt);
  border-radius: 2px;
  overflow: hidden;
}

.chapter-progress-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.6s ease;
}

.chapter-progress-fill.locked { background: var(--border); width: 0; }
.chapter-progress-fill.unlocked { background: var(--accent); width: 0; }
.chapter-progress-fill.in-progress { background: var(--accent-dark); }
.chapter-progress-fill.completed { background: #4caf50; }

/* === CHAPTER READER === */
.reader-container {
  max-width: 720px;
  margin: 0 auto;
  padding-bottom: 4rem;
}

.reader-progress {
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 1rem 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.reader-progress-bar {
  height: 4px;
  background: var(--bg-alt);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.reader-progress-fill {
  height: 100%;
  background: var(--accent-dark);
  border-radius: 2px;
  transition: width 0.6s ease;
}

.reader-progress-label {
  font-size: 0.75rem;
  color: var(--text-light);
  text-align: right;
  letter-spacing: 0.05em;
}

.reader-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 400;
  margin-bottom: 2rem;
  letter-spacing: 0.05em;
  line-height: 1.3;
}

.reader-body {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.9;
  color: var(--text);
}

.reader-body p {
  margin-bottom: 1.5rem;
}

.reader-body h3 {
  font-family: var(--font-kr);
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  margin: 2.5rem 0 1rem;
  text-transform: uppercase;
}

/* Case study card */
.case-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  border-left: 3px solid var(--accent-dark);
}

.case-card-title {
  font-family: var(--font-kr);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-dark);
  margin-bottom: 0.75rem;
}

.case-card-content {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  font-style: italic;
}

/* Exercise box */
.exercise-box {
  background: var(--white);
  border: 1px solid var(--accent);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
}

.exercise-box-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-dark);
  margin-bottom: 0.75rem;
}

.exercise-box-content {
  font-family: var(--font-kr);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text);
}

/* Key takeaways */
.takeaways-box {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
}

.takeaways-box-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-light);
  margin-bottom: 0.75rem;
}

.takeaways-list {
  list-style: none;
  padding: 0;
}

.takeaways-list li {
  padding: 0.4rem 0;
  padding-left: 1.2rem;
  position: relative;
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.6;
}

.takeaways-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent-dark);
}

/* Reader navigation */
.reader-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.reader-nav-btn {
  font-family: var(--font-kr);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--text);
  text-decoration: none;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: border-color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.reader-nav-btn:hover { border-color: var(--text); }
.reader-nav-btn.disabled { opacity: 0.3; pointer-events: none; }

.btn-marquer {
  display: block;
  width: 100%;
  max-width: 300px;
  margin: 2rem auto 0;
  padding: 0.85rem 2rem;
  background: var(--accent-dark);
  color: var(--white);
  border: none;
  border-radius: 2px;
  font-family: var(--font-kr);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background var(--transition);
  text-align: center;
}

.btn-marquer:hover { background: #a89278; }
.btn-marquer.done { background: #4caf50; }
.btn-marquer.done:hover { background: #388e3c; }

/* === PLANNING === */
.planning-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.planning-overall {
  font-size: 0.85rem;
  color: var(--text-light);
}

.planning-timeline {
  position: relative;
  padding-left: 2rem;
}

.planning-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.week-item {
  position: relative;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  background: var(--white);
  border: 1px solid var(--border);
  transition: transform var(--transition);
}

.week-item:hover { transform: translateX(4px); }
.week-item.done { border-left: 3px solid #4caf50; }
.week-item.in-progress { border-left: 3px solid var(--accent-dark); }
.week-item.pending { border-left: 3px solid var(--border); }

.week-item::before {
  content: '';
  position: absolute;
  left: -1.85rem;
  top: 1.5rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--border);
}

.week-item.done::before { background: #4caf50; border-color: #4caf50; }
.week-item.in-progress::before { background: var(--accent-dark); border-color: var(--accent-dark); }

.week-num {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--accent-dark);
  margin-bottom: 0.25rem;
}

.week-info {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
  margin-top: 0.75rem;
}

.week-info-item {
  font-size: 0.8rem;
  color: var(--text-light);
}

.week-info-item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 400;
  margin-bottom: 0.15rem;
}

.week-status {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
}

.week-status.done { background: #e8f5e9; color: #2e7d32; }
.week-status.in-progress { background: #fff8e1; color: #b8860b; }
.week-status.pending { background: var(--bg-alt); color: var(--text-light); }

/* === MESSAGING === */
.messages-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  height: calc(100vh - 140px);
  background: var(--white);
  border: 1px solid var(--border);
}

.conversations-list {
  border-right: 1px solid var(--border);
  overflow-y: auto;
}

.conversations-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  font-weight: 400;
}

.conversation-item {
  padding: 1rem 1.5rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.conversation-item:hover,
.conversation-item.active {
  background: var(--bg-alt);
}

.conversation-name {
  font-size: 0.85rem;
  color: var(--text);
  margin-bottom: 0.2rem;
  font-weight: 400;
}

.conversation-preview {
  font-size: 0.78rem;
  color: var(--text-light);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.conversation-time {
  font-size: 0.65rem;
  color: var(--text-light);
  float: right;
}

/* Chat area */
.chat-area {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  font-weight: 400;
}

.chat-messages {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chat-bubble {
  max-width: 75%;
  padding: 0.85rem 1.2rem;
  border-radius: 4px;
  font-size: 0.9rem;
  line-height: 1.6;
  position: relative;
}

.chat-bubble.sent {
  align-self: flex-end;
  background: var(--bg-alt);
  border: 1px solid var(--border);
}

.chat-bubble.received {
  align-self: flex-start;
  background: var(--white);
  border: 1px solid var(--border);
}

.chat-bubble-time {
  font-size: 0.65rem;
  color: var(--text-light);
  margin-top: 0.3rem;
  text-align: right;
}

.chat-input-area {
  display: flex;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.chat-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-family: var(--font-kr);
  font-size: 0.85rem;
  background: var(--white);
  outline: none;
  transition: border-color var(--transition);
}

.chat-input:focus { border-color: var(--accent-dark); }

.chat-send {
  padding: 0.75rem 1.5rem;
  background: var(--text);
  color: var(--white);
  border: none;
  border-radius: 2px;
  font-family: var(--font-kr);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background var(--transition);
}

.chat-send:hover { background: #444; }

/* === LOADING / ERROR STATES === */
.loading-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-light);
  font-size: 0.9rem;
}

.loading-spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent-dark);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 0.75rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.error-state {
  text-align: center;
  padding: 3rem;
  color: #c62828;
  font-size: 0.85rem;
}

.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-light);
  font-size: 0.85rem;
}

/* === SIDEBAR TOGGLE (mobile) === */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 60;
  background: var(--white);
  border: 1px solid var(--border);
  padding: 0.5rem 0.7rem;
  font-size: 1.2rem;
  cursor: pointer;
  border-radius: 2px;
  color: var(--text);
}

.sidebar-overlay {
  display: none;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .chapters-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-grid { grid-template-columns: 1fr; }
  .week-info { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.3);
    z-index: 49;
  }

  .sidebar-overlay.show { display: block; }

  .sidebar-toggle { display: block; }

  .main-content {
    margin-left: 0;
    padding: 2rem 1.25rem;
  }

  .chapters-grid { grid-template-columns: repeat(2, 1fr); }

  .messages-layout {
    grid-template-columns: 1fr;
  }

  .messages-layout .conversations-list {
    display: none;
  }

  .messages-layout .conversations-list.show {
    display: block;
  }

  .reader-title { font-size: 1.6rem; }
  .reader-body { font-size: 1.05rem; }

  .planning-timeline { padding-left: 1.5rem; }
}

@media (max-width: 480px) {
  .chapters-grid { grid-template-columns: 1fr; }
  .main-content { padding: 1.5rem 1rem; }
  .card-dash { padding: 1.25rem 1.25rem; }
}