/* Design tokens compartidos — identidad visual de Patricia Oliveira */
:root {
  /* Paleta: madera + ciencia/IA (verde bosque + acento tecnológico) */
  --color-bg: #faf8f4;
  --color-bg-alt: #f1ece2;
  --color-surface: #ffffff;
  --color-ink: #1c2420;
  --color-ink-soft: #4a5450;
  --color-border: #e2dccc;

  --color-brand: #1f4d3d;       /* verde bosque profundo */
  --color-brand-light: #3a7a5f;
  --color-wood: #a9754f;        /* acento madera */
  --color-wood-light: #d9b48f;
  --color-accent: #1f7f78;      /* acento IA: turquesa sereno */
  --color-accent-soft: #e0f1ee;
  --color-paper: #fffdf8;

  /* Láminas (ilustraciones de grabado) */
  --plate-ink: var(--color-ink);
  --plate-signal: var(--color-accent);
  --plate-wood-tint: #ecd9c2;
  --plate-board: #24423f;
  --plate-glass: #e4f2ef;

  /* Pizarra académica: fondo del explorador (fijo en ambos temas) */
  --slate-deep: #0f2b30;
  --slate-ink: #13304a;
  --slate-text: #eef3f1;
  --slate-muted: rgba(238, 243, 241, 0.72);

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, Segoe UI, Roboto, sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;

  --shadow-soft: 0 10px 30px -12px rgba(28, 36, 32, 0.18);
  --shadow-lift: 0 20px 45px -15px rgba(28, 36, 32, 0.25);

  --container-width: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --color-bg: #11140f;
    --color-bg-alt: #171b14;
    --color-surface: #1b201a;
    --color-ink: #f2efe6;
    --color-ink-soft: #b9c0b4;
    --color-border: #2b3127;
    --color-accent: #7fd1c4;
    --color-accent-soft: #16302c;
    --color-paper: #1e2420;
    --plate-wood-tint: #4b3a2a;
    --plate-board: #2a4945;
    --plate-glass: #1c3431;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #11140f;
  --color-bg-alt: #171b14;
  --color-surface: #1b201a;
  --color-ink: #f2efe6;
  --color-ink-soft: #b9c0b4;
  --color-border: #2b3127;
  --color-accent: #7fd1c4;
  --color-accent-soft: #16302c;
  --color-paper: #1e2420;
  --plate-wood-tint: #4b3a2a;
  --plate-board: #2a4945;
  --plate-glass: #1c3431;
}