/* Layout of the page. Colours come from themes.css (the five Paint themes). */
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; min-height: 100%; }
body {
  font: 14px/1.45 "Segoe UI", system-ui, -apple-system, "Noto Sans", sans-serif;
  color: var(--text);
  background: var(--app-base);
  background-image: var(--app-bg);
  background-attachment: fixed;
}
.app { max-width: 1280px; margin: 0 auto; padding: 16px 20px 12px; min-height: 100vh; display: flex; flex-direction: column; gap: 10px; }
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 15px; margin: 0 0 6px; }
p { margin: 4px 0; white-space: pre-line; }
.dim { color: var(--text-dim); }
.hint { color: var(--text-dim); font-size: 12px; white-space: pre-line; }
.error { color: var(--danger); white-space: pre-line; }
.ok { color: var(--success); }
:root[data-theme="light"] .ok { color: #138a6c; }
:root[data-theme="light"] .error, :root[data-theme="light"] .badge.warn { color: #c53232; }
.big { font-size: 16px; font-weight: 600; }
.mono, textarea, pre { font-family: "Cascadia Mono", Consolas, ui-monospace, monospace; }

.top { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; gap: 12px; align-items: center; }
.controls { display: flex; gap: 18px; flex-wrap: wrap; }
/* подпись отдельно от списка: был пробел в 4 px, «Тема» прилипала (Алексей 03.10) */
.controls label { display: inline-flex; align-items: center; gap: 10px; }

.steps { display: flex; gap: 2px; border-bottom: 1px solid var(--glass-border); flex-wrap: wrap; }
.steps .spacer { flex: 1; }
.step {
  background: none; border: none; border-bottom: 2px solid transparent; border-radius: 0; color: var(--text-dim);
  padding: 9px 14px; font-size: 14px; box-shadow: none;
}
.step:hover { color: var(--text); }
.step.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }

main { flex: 1; }
.page { display: flex; flex-direction: column; gap: 12px; }
.card {
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 14px; padding: 14px 16px;
  box-shadow: var(--glass-inset);
  -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
}
.card.import { border: 2px solid var(--accent); display: grid; grid-template-columns: 1fr auto; gap: 10px 18px; align-items: center; }
.card.import.over { background: var(--glass-bg-strong); }
.card.import .report { grid-column: 1 / -1; margin: 0; font-size: 12px; color: var(--text-dim); white-space: pre-wrap; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 6px 0; }
.section { font-size: 15px; font-weight: 600; }
.badge { font-weight: 600; color: var(--text-dim); }
.badge.ok { color: var(--success); }
.badge.warn { color: var(--danger); }

button, select, input, textarea {
  font: inherit; color: var(--text);
  background: var(--glass-bg-strong); border: 1px solid var(--glass-border); border-radius: 9px; padding: 7px 12px;
}
:root[data-theme="light"] button, :root[data-theme="light"] select,
:root[data-theme="light"] input, :root[data-theme="light"] textarea { background-color: #fff; }  /* только цвет: у select в фоне стрелка */
/* свой треугольник и место под ним: текст не подходит к стрелке; открытый список - в цвет
   темы, а не белый системный (Алексей 03.10) */
select {
  appearance: none; -webkit-appearance: none; padding: 7px 34px 7px 14px;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-dim) 50%),
                    linear-gradient(135deg, var(--text-dim) 50%, transparent 50%);
  background-position: calc(100% - 18px) 52%, calc(100% - 13px) 52%;
  background-size: 5px 5px, 5px 5px; background-repeat: no-repeat;
}
select option { color: var(--text); background: var(--app-base); padding: 6px 12px; }
button { cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: default; }
button:focus-visible, select:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button.primary, button.big { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
:root[data-theme="warm"] button.primary, :root[data-theme="warm"] button.big { color: #1d1610; }
button.big { font-size: 15px; padding: 11px 20px; }
button.small { padding: 3px 9px; font-size: 12px; }
input[type="checkbox"] { width: 17px; height: 17px; accent-color: var(--accent); padding: 0; }
input.missing, select.missing, textarea.missing { border: 2px solid var(--danger); }
label.check { display: inline-flex; gap: 6px; align-items: center; }

.grid { display: grid; grid-template-columns: minmax(150px, max-content) 1fr minmax(150px, max-content) 1fr; gap: 8px 12px; align-items: center; }
.grid input, .grid select { width: 100%; min-width: 0; }
.codes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.codes label { display: flex; flex-direction: column; gap: 4px; }
.codes textarea { width: 100%; min-height: 260px; font-size: 12px; resize: vertical; white-space: pre; }

.tests-layout { display: grid; grid-template-columns: minmax(280px, 340px) 1fr; gap: 14px; }
.tests-left, .tests-right { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
ul.tests { list-style: none; margin: 0; padding: 4px; background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 12px; }
ul.tests li { display: flex; gap: 8px; align-items: center; padding: 7px 8px; border-radius: 8px; cursor: pointer; border: 1px solid transparent; flex-wrap: wrap; }
ul.tests li:hover { background: var(--glass-bg-soft); }
ul.tests li.current { border-color: var(--accent); background: var(--glass-bg-strong); }
ul.tests .meta { font-size: 12px; margin-left: auto; }
.title { font-size: 20px; }
.params { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px 12px; }
.params div { display: flex; flex-direction: column; gap: 3px; }
.params input { width: 100%; }
.views { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.views:has(#box-front[hidden]) { grid-template-columns: 1fr; }
figure { margin: 0; display: flex; flex-direction: column; gap: 4px; }
figure canvas { width: 100%; height: 280px; display: block; }
.box3d { margin-top: 10px; }
.box3d figcaption { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.box3d input[type="range"] { flex: 1; min-width: 120px; padding: 0; accent-color: var(--accent); }
.view3d { width: 100%; height: 360px; border-radius: 10px; overflow: hidden; }
.view3d-canvas { width: 100%; height: 100%; display: block; cursor: grab; touch-action: none; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; color: var(--text-dim); font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--glass-border); }
td { padding: 6px 8px; border-bottom: 1px solid var(--glass-border); vertical-align: top; }
td.mono { font-size: 12px; white-space: nowrap; }

.nav { display: flex; justify-content: space-between; padding-top: 4px; }

@media (max-width: 900px) {
  .tests-layout, .codes, .views { grid-template-columns: 1fr; }
  .grid { grid-template-columns: minmax(120px, max-content) 1fr; }
  .card.import { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
:root[data-theme="light"] .step { background: none; }
td:nth-child(3) { white-space: nowrap; }
:root[data-theme="light"] button.primary, :root[data-theme="light"] button.big { background: var(--accent); border-color: var(--accent); color: #fff; }