/* ---------- PAPERMOD DARK THEME (matching Chromatica Pro) ---------- */
:root {
  --bg: #1d1e20;
  --card-bg: #2a2b2e;
  --card-hover: #333538;
  --text: #e6e6e6;
  --text-light: #ffffff;
  --text-muted: #b0b0b0;
  --accent: #ffd700;
  --accent-hover: #e6c200;
  --border: #333538;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --transition: all 0.2s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Roboto", system-ui, sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  padding: 0;
}

.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 60px);
}

.app-header {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 0.75rem 1.5rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.app-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-light);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.app-header h1 svg {
  stroke: var(--accent);
}
.app-header span {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  flex: 1;
  min-height: 500px;
}

.section {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.25rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.section:hover {
  border-color: var(--accent);
}

.section h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-light);
  margin: 0 0 0.75rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.75rem;
}
.controls label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-right: 0.25rem;
}
button,
select {
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  background: transparent;
  color: var(--text-muted);
}
button {
  background: var(--accent);
  color: var(--bg);
  border: 1px solid var(--accent);
  font-weight: 500;
}
button:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
}
select {
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--border);
}
select:hover {
  border-color: var(--accent);
}
select:focus {
  outline: none;
  border-color: var(--accent);
}

/* CodeMirror */
.CodeMirror {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: "Roboto Mono", monospace;
  font-size: 14px;
  background: var(--bg) !important;
  color: var(--text) !important;
  min-height: 300px;
  height: auto !important;
}
.CodeMirror-gutters {
  background: var(--card-bg) !important;
  border-right: 1px solid var(--border) !important;
}
.CodeMirror-linenumber {
  color: var(--text-muted) !important;
}
.CodeMirror-cursor {
  border-left: 2px solid var(--accent) !important;
}
.CodeMirror-activeline-background {
  background: rgba(255, 215, 0, 0.08);
}
/* Syntax highlighting (dark mode friendly) */
.cm-s-default .cm-keyword {
  color: #ff7b72;
}
.cm-s-default .cm-atom {
  color: #d2a8ff;
}
.cm-s-default .cm-number {
  color: #79c0ff;
}
.cm-s-default .cm-def {
  color: #d2a8ff;
}
.cm-s-default .cm-variable {
  color: #ffa657;
}
.cm-s-default .cm-variable-2 {
  color: #ffa657;
}
.cm-s-default .cm-comment {
  color: #8b949e;
}
.cm-s-default .cm-string {
  color: #a5d6ff;
}
.cm-s-default .cm-string-2 {
  color: #a5d6ff;
}
.cm-s-default .cm-meta {
  color: #79c0ff;
}
.cm-s-default .cm-qualifier {
  color: #d2a8ff;
}
.cm-s-default .cm-builtin {
  color: #ffa657;
}
.cm-s-default .cm-bracket {
  color: #8b949e;
}
.cm-s-default .cm-tag {
  color: #7ee787;
}
.cm-s-default .cm-attribute {
  color: #79c0ff;
}
.cm-s-default .cm-hr {
  color: #8b949e;
}
.cm-s-default .cm-link {
  color: #58a6ff;
}

/* ---------- PREVIEW PANEL – full-size with scroll bars ---------- */
#preview {
  overflow: auto; /* scrollbar appears only here */
  padding: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 0; /* allows flex to size it */
  flex: 1; /* fills the preview section */
  display: block;
}

/* Wrapper that shrink-wraps the SVG */
#preview .mermaid {
  display: inline-block;
  padding: 0;
}

/* SVG now gets an explicit width from JavaScript, so these are fallback */
#preview svg {
  display: block;
  height: auto;
  background: white;
}

#preview .error {
  color: #f85149;
  font-family: monospace;
  white-space: pre-wrap;
  padding: 1rem;
}

.site-footer {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 0.75rem 1.5rem;
  margin-top: 1.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1rem;
}
.site-footer .footer-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.site-footer .footer-left a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}
.site-footer .footer-left a:hover {
  color: var(--accent);
}
.site-footer .footer-right {
  color: var(--text-muted);
  font-size: 0.75rem;
}

@media (max-width: 768px) {
  .grid {
    display: grid;
    grid-template-columns: minmax(280px, 1fr) minmax(350px, 2fr);
    grid-template-rows: 1fr;
    gap: 1.5rem;
    flex: 1; /* takes remaining height */
    min-height: 0; /* allows shrinking below content */
    overflow: hidden; /* no grid-level scrollbar */
  }

  .container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 1.5rem 1.5rem 0;
    display: flex;
    flex-direction: column;
    height: 100vh; /* full viewport height */
    overflow: hidden; /* prevents page-level scrollbar */
  }

  .app-header h1 {
    font-size: 1.2rem;
  }
  .controls {
    gap: 0.4rem;
  }
  button,
  select {
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
  }
  .site-footer {
    flex-direction: column;
    text-align: center;
    gap: 0.25rem;
  }
  .site-footer .footer-left {
    flex-wrap: wrap;
    justify-content: center;
  }
}