/* ==========================================================================
   MathX — Design tokens
   Fonte unica da paleta, sombras, raios e easing. Carregado antes de
   app.css (app) e landing.css (landing); cada folha so redefine o
   que precisa divergir.
   ========================================================================== */

:root {
  /* Core Palette - Light Mode - refinado sem quadrados brancos empilhados */
  --bg: #f6f7f9;
  --surface: #ffffff;
  --sidebar: #f1f3f5;
  --raised: #ffffff;
  --card: #ffffff;
  --card-soft: #f8f9fb;
  --inset: #f1f3f5;
  --text: #0f172a;
  --muted: #64748b;
  --line: rgba(15, 23, 42, 0.07);
  --line-strong: rgba(15, 23, 42, 0.12);
  --hover: #eef1f5;
  --hover-subtle: #f6f7f9;
  
  /* Brand Accents */
  --accent: #10b981;
  --accent-hover: #059669;
  --accent-light: rgba(16, 185, 129, 0.12);
  --accent-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --accent-glow: 0 0 20px rgba(16, 185, 129, 0.25);
  
  /* Status & Feedback */
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --warning: #f59e0b;
  --info: #3b82f6;
  
  /* Elevation & Effects - suavizados */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 16px -4px rgba(15, 23, 42, 0.06), 0 2px 8px -2px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 12px 32px -8px rgba(15, 23, 42, 0.10), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  --shadow: 0 24px 48px -12px rgba(15, 23, 42, 0.14);
  --shadow-card: 0 2px 10px rgba(15, 23, 42, 0.04);
  --glass-bg: rgba(255, 255, 255, 0.82);
  --glass-border: rgba(15, 23, 42, 0.06);
  
  /* Graph & Visualizer */
  --graph-grid: #e2e8f0;
  --graph-axis: #94a3b8;
  
  /* Transitions & Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);

  /* Altura minima do canvas do grafico. E' um piso, nao um tamanho fixo: com
     folga no painel a visualizacao cresce. Sem ele o canvas colapsa a zero
     quando o cartao de registros e' alto (ver .stage em app.css). */
  --canvas-min-h: 200px;
}

html[data-theme="dark"] {
  --bg: #0b0c10;
  --surface: #12141a;
  --sidebar: #0e0f14;
  --raised: #181a22;
  --card: #1a1d26;
  --card-soft: #1f232f;
  --inset: #14171f;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.13);
  --hover: rgba(255, 255, 255, 0.06);
  --hover-subtle: rgba(255, 255, 255, 0.03);
  
  --accent: #10b981;
  --accent-hover: #34d399;
  --accent-light: rgba(16, 185, 129, 0.16);
  --accent-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --accent-glow: 0 0 24px rgba(16, 185, 129, 0.28);
  
  --danger: #f87171;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --warning: #fbbf24;
  --info: #60a5fa;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.5);
  --shadow: 0 24px 56px rgba(0, 0, 0, 0.65);
  --glass-bg: rgba(18, 20, 26, 0.82);
  --glass-border: rgba(255, 255, 255, 0.09);
  
  --graph-grid: #1e222d;
  --graph-axis: #475569;
}