:root {
  --bg-color: #f5f6f8;
  --sidebar-bg: #f0f1f4;
  --card-bg: #ffffff;
  --text-color: #1f2933;
  --muted-color: #6b7280;
  --accent-color: #2563eb;
  --border-color: #d4d7dc;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body.dark {
  --bg-color: #0f172a;
  --sidebar-bg: #111c31;
  --card-bg: #1e293b;
  --text-color: #f8fafc;
  --muted-color: #cbd5f5;
  --accent-color: #60a5fa;
  --border-color: #23324f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  color-scheme: light;
  transition: background 0.25s ease, color 0.25s ease;
}

body.dark {
  color-scheme: dark;
}

#app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 320px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

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

.sidebar-header h1 {
  margin: 0;
  font-size: 1.25rem;
}

.session-list {
  flex: 1;
  overflow-y: auto;
}

.session-item {
  padding: 1rem 1.5rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: background 0.2s ease, color 0.2s ease;
  background: transparent;
  text-align: left;
  color: inherit;
  border: none;
  width: 100%;
  font: inherit;
  border-bottom: 1px solid var(--border-color);
}

.session-item:hover,
.session-item.active {
  background: rgba(37, 99, 235, 0.08);
}

.session-item-title {
  font-size: 1rem;
  font-weight: 600;
}

.session-item-meta {
  font-size: 0.85rem;
  color: var(--muted-color);
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.main-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1100;
  background: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  font-size: 1rem;
  box-shadow: 0 10px 20px -12px rgba(15, 23, 42, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 30px -22px rgba(15, 23, 42, 0.6);
}

.session-detail.empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--muted-color);
}

.session-header {
  margin-bottom: 1.5rem;
}

.session-header h2 {
  margin: 0 0 0.5rem 0;
  font-size: 1.75rem;
}

.session-summary {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 18px 25px -20px rgba(15, 23, 42, 0.25);
}

.session-summary h3 {
  margin: 0 0 0.75rem 0;
  font-size: 1.25rem;
}

.session-summary-body {
  line-height: 1.6;
  color: var(--text-color);
}

.session-summary-body p {
  margin: 0 0 0.75rem 0;
}

.session-summary-body ul,
.session-summary-body ol {
  margin: 0 0 0.75rem 1.5rem;
  padding-left: 1.25rem;
}

.session-summary-body li {
  margin-bottom: 0.35rem;
}

.session-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.95rem;
  color: var(--muted-color);
  margin-bottom: 1rem;
}

.share-button {
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: var(--accent-color);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s ease, border 0.2s ease, transform 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.share-button:hover {
  background: rgba(37, 99, 235, 0.15);
  border-color: var(--accent-color);
  transform: translateY(-1px);
}

.delete-button {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #ef4444;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s ease, border 0.2s ease, transform 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 0.5rem;
}

.delete-button:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: #ef4444;
  transform: translateY(-1px);
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 2rem;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.modal-content h3 {
  margin: 0 0 1rem 0;
  font-size: 1.25rem;
  color: var(--text-color);
}

.modal-content p {
  margin: 0 0 1.5rem 0;
  color: var(--muted-color);
  line-height: 1.5;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

.form-group input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  background: var(--bg-color);
  color: var(--text-color);
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.modal-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

.cancel-button {
  background: rgba(107, 114, 128, 0.08);
  border: 1px solid rgba(107, 114, 128, 0.2);
  color: var(--muted-color);
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s ease, border 0.2s ease;
}

.cancel-button:hover {
  background: rgba(107, 114, 128, 0.15);
  border-color: var(--muted-color);
}

.confirm-delete-button {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #ef4444;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s ease, border 0.2s ease;
}

.confirm-delete-button:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: #ef4444;
}

.participants {
  margin-top: 1.5rem;
  background: var(--card-bg);
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

.participants h3 {
  margin: 0 0 0.75rem 0;
  font-size: 1rem;
}

.session-playback {
  margin-top: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.05);
}

.session-playback h3 {
  margin: 0 0 0.75rem 0;
  font-size: 1rem;
}

.participant-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.95rem;
}

.participant-pill {
  background: rgba(107, 114, 128, 0.12);
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
}

.transcript {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  overflow: hidden;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.05);
}

.segment {
  padding: 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  background: transparent;
}

.segment:last-of-type {
  border-bottom: none;
}

.segment-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
}

.segment-header-main {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.segment-title {
  font-weight: 600;
  font-size: 1rem;
}

.segment-text {
  font-size: 1rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

.segment-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.segment-play {
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: var(--accent-color);
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.2s ease, border 0.2s ease, transform 0.2s ease;
}

.segment-play:hover {
  background: rgba(37, 99, 235, 0.15);
  border-color: var(--accent-color);
  transform: translateY(-1px);
}

.segment-play[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}

@media (max-width: 960px) {
  .sidebar {
    width: 100%;
    max-width: none;
  }

  #app {
    flex-direction: column;
  }

  .main-content {
    padding: 1.5rem;
  }
}