/* ── Design Tokens ── */

:root {
  /* Primary palette */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  --primary-dark: #1e40af;

  /* Excel green */
  --excel: #217346;
  --excel-light: #e6f4ea;
  --excel-toolbar: #217346;

  /* VS Code / Python panel */
  --vscode-bg: #1e1e1e;
  --vscode-sidebar: #252526;
  --vscode-active: #1e1e1e;
  --vscode-border: #3c3c3c;
  --vscode-text: #d4d4d4;
  --vscode-comment: #6a9955;
  --vscode-keyword: #c586c0;
  --vscode-string: #ce9178;
  --vscode-number: #b5cea8;
  --vscode-type: #4ec9b0;
  --vscode-function: #dcdcaa;

  /* Sidebar */
  --sidebar-bg: #0f172a;
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;
  --sidebar-hover: #1e293b;
  --sidebar-section: #64748b;
  --sidebar-border: #1e293b;

  /* Surfaces */
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;

  /* Text */
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  /* Status */
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --error: #ef4444;
  --error-light: #fee2e2;
  --info: #3b82f6;

  /* Spacing scale */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;

  /* Typography */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", "Fira Code", "Consolas", monospace;
  --text-xs: 11px;
  --text-sm: 12px;
  --text-base: 13px;
  --text-md: 14px;
  --text-lg: 16px;
  --text-xl: 20px;
  --text-2xl: 24px;

  /* Radius */
  --radius-sm: 4px;
  --radius: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --sidebar-width: 260px;
  --titlebar-height: 56px;
  --tabbar-height: 40px;
  --trybar-height: 44px;
}

/* ── Reset ── */

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

html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font);
  font-size: var(--text-base);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--primary-light);
  color: var(--primary-dark);
}