/* Reset, tipografia e formularios -- "Caderno de estudo". */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--fs-base);
  font-variation-settings: var(--print);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0 0 var(--s3);
  line-height: 1.2;
  font-weight: 700;
  color: var(--ink);
}
h1 { font-size: var(--fs-xl); font-variation-settings: var(--casual); letter-spacing: -0.01em; }
h2 { font-size: var(--fs-lg); font-weight: 650; }
h3 { font-size: var(--fs-md); font-weight: 650; }
h4 { font-size: var(--fs-base); font-weight: 650; }
@media (min-width: 900px) { h1 { font-size: var(--fs-xxl); } }

p { margin: 0 0 var(--s3); max-width: var(--measure); }
small, .muted { color: var(--muted); }
small { font-size: var(--fs-sm); }
strong { font-weight: 650; }

a { color: var(--pen); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

::selection { background: var(--highlight); color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--pen);
  outline-offset: 2px;
  border-radius: 4px;
}

img, svg { max-width: 100%; }

table { border-collapse: collapse; }

/* --- Formularios --- */

form p, .field { margin: 0 0 var(--s4); max-width: none; }

label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--s1);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
textarea,
select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-btn);
  background: var(--card);
  color: var(--ink);
  font: inherit;
  font-variation-settings: var(--print);
}
textarea { min-height: 96px; resize: vertical; line-height: 1.5; }
input:hover, textarea:hover, select:hover { border-color: var(--muted); }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--pen);
  box-shadow: 0 0 0 3px var(--pen-soft);
}
input[type="checkbox"], input[type="radio"] { accent-color: var(--pen); width: 18px; height: 18px; }
input:disabled, textarea:disabled, button:disabled { opacity: 0.55; cursor: not-allowed; }

/* Erros do Django: texto + icone, nunca so' cor */
.errorlist {
  list-style: none;
  margin: var(--s1) 0 0;
  padding: 0;
  color: var(--red);
  font-size: var(--fs-sm);
  font-weight: 600;
}
.errorlist li::before { content: "✗ "; }
.errorlist.nonfield {
  padding: var(--s3) var(--s4);
  border-radius: var(--r-btn);
  background: var(--red-soft);
  margin-bottom: var(--s4);
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

fieldset { border: 0; padding: 0; margin: 0 0 var(--s4); min-width: 0; }
legend { font-weight: 600; margin-bottom: var(--s1); padding: 0; }
[hidden] { display: none !important; }