/* Forms and buttons. */

label { display: block; font-weight: 600; font-size: 0.875rem; margin-bottom: 0.35rem; }

input[type="text"], input[type="email"], input[type="password"], input[type="number"],
input[type="datetime-local"], input[type="search"], select, textarea {
  width: 100%;
  font: inherit;
  color: inherit;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  transition: border-color 0.12s, box-shadow 0.12s;
}
input:hover, select:hover, textarea:hover { border-color: #c5c8ce; }
input:focus, select:focus, textarea:focus, trix-editor:focus {
  outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px var(--color-accent-soft);
}
input::placeholder, textarea::placeholder { color: var(--color-faint); }
input[disabled], textarea[disabled], select[disabled] { background: var(--color-surface-muted); color: var(--color-muted); cursor: not-allowed; }
input[readonly] { background: var(--color-surface-muted); }

textarea.code { font-family: var(--font-mono); font-size: 0.875rem; tab-size: 2; background: #f1f5fb; border-color: #dde7f4; color: #2f3f5a; line-height: 1.6; }

input[type="checkbox"], input[type="radio"] { accent-color: var(--color-accent); width: 1.05rem; height: 1.05rem; }

.field { margin-bottom: var(--space-3); }
.form { display: grid; gap: var(--space-1); max-width: 40rem; }
.form--wide { max-width: 56rem; }
.field-row { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); }

.fieldset { border: 1px solid var(--color-border); border-radius: var(--radius); padding: var(--space-3) var(--space-4); margin: 0 0 var(--space-3); display: grid; gap: var(--space-2); background: var(--color-surface-muted); }
.fieldset legend { font-weight: 650; padding: 0 var(--space-1); }
.question .fieldset, .answer-form .fieldset { background: transparent; border: 0; padding: 0; }

.checkbox { display: flex; gap: var(--space-2); align-items: center; font-weight: 400; font-size: 0.9375rem; margin: 0; }
.checkbox input { width: 1.05rem; flex: none; }

.nested-rows { display: grid; gap: var(--space-2); }
.nested-row { display: grid; grid-template-columns: auto 1fr auto; gap: var(--space-2); align-items: center; }
.nested-row--criterion { grid-template-columns: 1fr 7rem auto; align-items: start; }
.nested-row--model-answer { grid-template-columns: 1fr auto; align-items: start; }
.nested-row--model-answer .field { margin: 0; min-width: 0; }
.nested-row[hidden] { display: none; }

.points-sum { margin: 0; font-size: 0.875rem; }
.points-sum--mismatch .points-sum strong, .points-sum--mismatch .points-sum { color: var(--rose-text); }

/* ---- Buttons ---- */
.button, button, input[type="submit"] {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4em;
  font: inherit; font-weight: 600; font-size: 0.9375rem; line-height: 1.2;
  cursor: pointer; text-decoration: none; white-space: nowrap;
  border: 1px solid var(--color-ink); border-radius: 10px;
  background: var(--color-ink); color: var(--color-bg);
  padding: 0.62rem 1.05rem;
  box-shadow: none;
  transition: background 0.12s, border-color 0.12s, box-shadow 0.12s, transform 0.05s;
}
.button:hover, button:hover, input[type="submit"]:hover { background: var(--color-ink-hover); border-color: var(--color-ink-hover); color: var(--color-bg); }
.button:active, button:active, input[type="submit"]:active { transform: translateY(1px); }

.button--secondary, button.button--secondary {
  background: var(--color-surface); color: var(--color-text); border-color: var(--color-border-strong); box-shadow: none;
}
.button--secondary:hover, button.button--secondary:hover { background: var(--color-panel); border-color: #c5c8ce; color: var(--color-text); }

.button--small, button.button--small { padding: 0.35rem 0.7rem; font-size: 0.8125rem; border-radius: 8px; }

button[disabled], input[type="submit"][disabled], .button[disabled] {
  background: var(--color-track); border-color: var(--color-track); color: var(--color-faint); box-shadow: none; cursor: not-allowed; transform: none;
}

/* The dialog's close button and similar inline buttons */
form[method="dialog"] { margin-top: var(--space-3); }

/* ---- Rich text editor ---- */
trix-toolbar .trix-button-row { flex-wrap: wrap; gap: var(--space-1); }
trix-toolbar .trix-button-group { border-color: var(--color-border-strong); border-radius: 8px; overflow: hidden; margin-bottom: var(--space-2); }
trix-toolbar .trix-button { border-bottom: 0; }
trix-toolbar .trix-button.trix-active { background: var(--color-accent-soft); }
/* Violet is for verification: the one button that verifies a grade uses it. */
.button--verify, button.button--verify, input[type="submit"].button--verify { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.button--verify:hover, input[type="submit"].button--verify:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); color: #fff; }
trix-editor {
  background: var(--color-surface); min-height: 8rem;
  border: 1px solid var(--color-border-strong) !important; border-radius: 10px !important;
  padding: 0.6rem 0.8rem !important;
}

/* Secondary styling must win over the base submit-button rule. */
input[type="submit"].button--secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border-strong); box-shadow: none; }
input[type="submit"].button--secondary:hover { background: var(--color-panel); border-color: #c5c8ce; color: var(--color-text); }

/* Submit buttons keep their natural width in grid forms, except on the sign-in style pages. */
.form > input[type="submit"] { justify-self: start; }
.auth .form > input[type="submit"] { justify-self: stretch; }

.form > .checkbox { margin-bottom: var(--space-3); }
.form > .hint { margin: calc(-1 * var(--space-2)) 0 var(--space-3); }

/* Buttons that ask the AI for something: dashed, like the drafts they produce. */
.button--ai, a.button--ai { background: var(--ai-bg); color: var(--ai-ink); border: 1.5px dashed var(--ai-border); }
.button--ai:hover, a.button--ai:hover { background: var(--lilac-soft); color: var(--prof-ink); border-color: var(--ai-ring); }

.nested-row--skill { grid-template-columns: 1fr auto; align-items: start; }
.nested-row__stack { display: grid; gap: var(--space-2); min-width: 0; }
.nested-row__line { display: grid; grid-template-columns: minmax(0, 1fr) 11rem; gap: var(--space-2); }
@media (max-width: 560px) { .nested-row__line { grid-template-columns: 1fr; } }
.skill-options { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4); }
.nested-row--skill + .nested-row--skill { border-top: 1px dashed var(--color-border-strong); padding-top: var(--space-2); }

/* ---- Icons (IconsHelper) ---- */
.icon { width: 1.1em; height: 1.1em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.button--icon, button.button--icon { padding: 0.55rem; aspect-ratio: 1; gap: 0; }
.button--icon .icon { width: 1.15rem; height: 1.15rem; }
.button--small.button--icon, button.button--small.button--icon { padding: 0.38rem; }
.button--small.button--icon .icon { width: 1rem; height: 1rem; }
.button--danger:hover, button.button--danger:hover { background: var(--rose-soft); border-color: #f0b8c8; color: var(--rose-text); }
.icon-link { display: inline-flex; align-items: center; gap: 0.35rem; }
.sidebar__user .button--icon { margin-left: auto; }

/* The one button that deletes a whole course: solid rose, and disabled until confirmed. */
.button--danger-solid { background: var(--rose-text); border-color: var(--rose-text); color: #fff; }
.button--danger-solid:hover { background: #8a3159; border-color: #8a3159; }
.button--danger-solid:disabled { opacity: 0.45; cursor: not-allowed; }