* {
  box-sizing: border-box;
}

:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1d2430;
  --border: #2a3140;
  --text: #e6edf3;
  --muted: #9aa4b2;
  --accent: #ffd369;
  --accent-2: #f7b801;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, sans-serif;
}

body {
  min-height: 100vh;
}

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

.sidebar {
  width: 340px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 20px;
  overflow-y: auto;
}

.brand h1 {
  margin: 0 0 6px;
  font-size: 28px;
}

.brand p {
  margin: 0 0 20px;
  color: var(--muted);
}

#searchInput {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #0f141b;
  color: var(--text);
  outline: none;
  margin-bottom: 20px;
  font-size: 15px;
}

.story-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 14px;
  margin-bottom: 16px;
}

.story-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.story-title {
  font-size: 18px;
  font-weight: bold;
  color: var(--accent);
}

.story-count {
  font-size: 12px;
  color: var(--muted);
  background: #111823;
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 999px;
}

.chapter-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 11px 12px;
  margin-bottom: 8px;
  background: #101720;
  border: 1px solid #2b3545;
  color: var(--text);
  border-radius: 12px;
  cursor: pointer;
  transition: 0.2s ease;
}

.chapter-btn:hover {
  background: #16202d;
}

.chapter-btn.active {
  border-color: var(--accent-2);
  background: #1b2633;
}

.main {
  flex: 1;
  padding: 28px;
  overflow-y: auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.topbar h2 {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 30px;
}

.topbar p {
  margin: 0;
  color: var(--muted);
}

.nav-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-buttons button,
.pagination-box button {
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.nav-buttons button:disabled,
.pagination-box button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.reader {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 28px;
  white-space: pre-wrap;
  line-height: 1.95;
  font-size: 18px;
  min-height: 60vh;
}

.empty-state {
  color: var(--muted);
  padding: 20px 0;
}

.pagination-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

#storyPageInfo {
  color: var(--muted);
  font-size: 14px;
}

.footer-note {
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 980px) {
  .app {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .main {
    padding: 20px;
  }

  .reader {
    padding: 20px;
    font-size: 17px;
  }

  .topbar h2 {
    font-size: 24px;
  }
}