/* Типографика, формы, кнопки — всё, что не зависит от конкретного экрана. */

* { box-sizing: border-box; }
html, body { min-height: 100%; }
html { scroll-behavior: smooth; }
::selection { color: var(--ink); background: var(--accent-soft); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.55 "Avenir Next", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1 { font-size: clamp(24px, 2.1vw, 30px); font-weight: 720; letter-spacing: -.035em; line-height: 1.15; margin: 0 0 7px; text-wrap: balance; }
h2 { font-size: 17px; font-weight: 680; letter-spacing: -.015em; margin: 28px 0 10px; }
h3 { font-size: 14px; font-weight: 650; margin: 0 0 6px; }
p { margin: 8px 0; }
a { color: var(--accent-ink); }
a:hover { color: var(--accent); }

.sub { color: var(--muted); margin: 0 0 22px; max-width: 64ch; }
.muted { color: var(--muted); }
.num { font-variant-numeric: tabular-nums; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: .92em; }

button, input, select, textarea { font: inherit; color: inherit; }
input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="color"]),
select,
textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  min-height: 40px;
  padding: 8px 11px;
  transition: border-color .16s ease, box-shadow .16s ease, background-color .16s ease;
}
textarea { resize: vertical; min-height: 104px; line-height: 1.55; }
input[type="checkbox"], input[type="radio"] { accent-color: var(--accent); }
input[type="checkbox"] { width: 16px; height: 16px; margin: 0; }
input[type="radio"] { width: 16px; height: 16px; margin: 0; }
input[type="range"] { accent-color: var(--accent); }
input[type="file"] { padding: 5px; }
input[type="file"]::file-selector-button {
  border: 0; border-radius: 6px; background: var(--surface-2); color: var(--ink);
  padding: 6px 9px; margin-right: 9px; cursor: pointer;
}
input::placeholder, textarea::placeholder { color: color-mix(in srgb, var(--muted) 72%, transparent); }
input:disabled, select:disabled, textarea:disabled { cursor: not-allowed; opacity: .66; background: var(--surface-2); }
input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

label {
  display: block;
  font-size: 12px;
  font-weight: 650;
  color: var(--ink);
  margin: 14px 0 6px;
}
label.inline { display: flex; align-items: center; gap: 9px; font-size: 13px; color: var(--ink); margin: 10px 0; }
label:has(input[type="checkbox"]), label:has(input[type="radio"]) { cursor: pointer; }

.btn {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--r-sm);
  min-height: 38px;
  padding: 7px 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease, transform .16s ease, box-shadow .16s ease;
}
.btn:hover { background: var(--surface-2); border-color: color-mix(in srgb, var(--line) 55%, var(--muted)); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-on); }
.btn.primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); box-shadow: 0 3px 10px color-mix(in srgb, var(--accent) 20%, transparent); }
.btn.danger { color: var(--crit); border-color: var(--crit); }
.btn.danger:hover { background: var(--crit-soft); }
.btn.small { min-height: 32px; padding: 4px 9px; font-size: 12.5px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.error { color: var(--crit); font-size: 13px; margin-top: 8px; }
.error:empty { display: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}