@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap');

:root {
  --bg-page: #0a0d14;
  --bg-surface: #111622;
  --bg-surface-hover: #171e2e;
  --bg-surface-elevated: #1a2234;
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-muted: rgba(255, 255, 255, 0.12);
  --border-active: rgba(99, 102, 241, 0.5);
  
  --text-main: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-light: rgba(99, 102, 241, 0.12);

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

code, pre, .mono {
  font-family: 'JetBrains Mono', monospace;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: #262f45;
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: #3b4664;
}

/* Minimal Card */
.card-clean {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 0.875rem;
  transition: border-color 0.15s ease;
}
.card-clean:hover {
  border-color: var(--border-muted);
}

.card-elevated {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-muted);
  border-radius: 0.875rem;
}

/* Tab buttons */
.nav-tab {
  color: var(--text-secondary);
  border-radius: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: all 0.15s ease;
  padding: 0.35rem 0.65rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap !important;
  flex-shrink: 0 !important;
  user-select: none;
  cursor: pointer;
}
.nav-tab:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.05);
}
.nav-tab.active {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.12);
  font-weight: 600;
}

/* KaTeX Overrides */
.katex {
  font-size: 1.05em;
  color: #60a5fa;
}
.katex-display {
  margin: 0.85em 0;
  padding: 0.65em 0.85em;
  background: rgba(10, 13, 20, 0.7);
  border-radius: 0.5rem;
  border-left: 2px solid #3b82f6;
  overflow-x: auto;
  overflow-y: hidden;
}

/* Callout styles matching Obsidian */
.obsidian-callout {
  border-left: 3px solid;
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  margin: 0.875rem 0;
  background: rgba(17, 22, 34, 0.6);
}
.obsidian-callout.tip {
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.06);
}
.obsidian-callout.danger {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.06);
}
.obsidian-callout.example {
  border-color: #6366f1;
  background: rgba(99, 102, 241, 0.06);
}
.obsidian-callout.abstract {
  border-color: #06b6d4;
  background: rgba(6, 182, 212, 0.06);
}
.obsidian-callout.info {
  border-color: #3b82f6;
  background: rgba(59, 130, 246, 0.06);
}

/* Button & Input Base */
input, textarea, select {
  background-color: #0a0e17;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  border-radius: 0.5rem;
  transition: border-color 0.15s ease;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: #4f46e5;
}

/* Hide scrollbar utility */
.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}