/* KN institutional v1.0. Official assets and tokens; original hero retained. */
:root {
  --font: var(--kn-font-sans);
  --mono: var(--kn-font-mono);
  --bg: var(--kn-background);
  --surface: var(--kn-surface);
  --surface-2: var(--kn-surface-secondary);
  --text: var(--kn-text);
  --muted: var(--kn-text-muted);
  --accent: var(--kn-accent);
  --ink: var(--kn-on-accent);
  --line: var(--kn-divider);
  --control-line: var(--kn-control-border);
  --error: var(--kn-error);
  --error-bg: var(--kn-error-background);
}
/* Rebind aliases after the existing light-theme declarations. */
:root[data-theme="light"] {
  --bg: var(--kn-background);
  --surface: var(--kn-surface);
  --surface-2: var(--kn-surface-secondary);
  --text: var(--kn-text);
  --muted: var(--kn-text-muted);
  --accent: var(--kn-accent);
  --ink: var(--kn-on-accent);
  --line: var(--kn-divider);
  --control-line: var(--kn-control-border);
  --error: var(--kn-error);
  --error-bg: var(--kn-error-background);
}
.kn-brand { width: 180px; height: auto; display: block; }
.kn-brand-on-light { display: none; }
[data-theme="light"] .kn-brand-on-dark { display: none; }
[data-theme="light"] .kn-brand-on-light { display: block; }
.site-footer .kn-brand { width: 200px; }
h1, h2, h3 { font-weight: var(--kn-weight-title); }
.button, .campo__rotulo, .kn-card-label { font-weight: var(--kn-weight-label); }
strong, b { font-weight: var(--kn-weight-emphasis); }
.button, .site-header nav .nav-contact, .campo__entrada, .kn-journey-controls button { border-radius: var(--kn-radius-control); }
.site-header, .project-card, .kn-architecture-card, .contact-layout, .image-dialog, .founder-card { border-radius: var(--kn-radius-container); }
.button, .site-header nav .nav-contact { min-height: 44px; }
.button:active:not(:disabled), .kn-journey-controls button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { cursor: not-allowed; border-style: dashed; }
.botao--enviar[disabled] { background: var(--surface-2); color: var(--muted); border-color: var(--control-line); }
@media (max-width: 480px) { .kn-brand { width: 158px; } .site-footer .kn-brand { width: 180px; } }
@media (max-width: 360px) { .site-header .kn-brand { width: 126px; } }
.formulario__nota .privacy-contact { text-decoration: underline; text-underline-offset: 3px; }