/* ============================================================
   QR-оплата ЖКУ — современная адаптивная тема
   Светлая, «воздушная», системный шрифт. Mobile-first.
   ============================================================ */

:root {
  --bg:            #f5f7fa;
  --surface:       #ffffff;
  --surface-hover: #fafbfc;
  --surface-muted: #f8fafc;
  --border:        #e3e8ef;
  --text:          #1f2937;
  --text-muted:    #6b7280;
  --text-soft:     #4b5563;
  --placeholder:   #9aa4b2;
  --control-border:#c0c7d2;
  --control-border-hover: #c7d0dc;
  --primary:       #2563eb;
  --primary-dark:  #1d4ed8;
  --primary-soft:  #eff4ff;
  --danger:        #dc2626;
  --danger-bg:     #fef2f2;
  --danger-border: #fecaca;
  --info-bg:       #eff6ff;
  --info-border:   #bfdbfe;
  --info-text:     #1e40af;
  --focus-ring:    rgba(37, 99, 235, 0.15);
  --result-header-end: #ffffff;
  --qr-bg:         #ffffff;
  --radius:        12px;
  --radius-sm:     8px;
  --shadow-sm:     0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow:        0 4px 16px rgba(16, 24, 40, 0.08);
  --shadow-lg:     0 12px 32px rgba(16, 24, 40, 0.10);
  --maxw:          720px;
  --header-height: 60px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg:            #0f1419;
  --surface:       #1a2332;
  --surface-hover: #222d3d;
  --surface-muted: #162032;
  --border:        #2d3a4d;
  --text:          #e8edf4;
  --text-muted:    #8b9cb3;
  --text-soft:     #a8b8cc;
  --placeholder:   #6b7d94;
  --control-border:#4a5d73;
  --control-border-hover: #5a7090;
  --primary:       #3b82f6;
  --primary-dark:  #60a5fa;
  --primary-soft:  #1e3a5f;
  --danger:        #f87171;
  --danger-bg:     #3d1f1f;
  --danger-border: #7f1d1d;
  --info-bg:       #1e3a5f;
  --info-border:   #2563eb;
  --info-text:     #93c5fd;
  --focus-ring:    rgba(59, 130, 246, 0.25);
  --result-header-end: #1a2332;
  --qr-bg:         #ffffff;
  --shadow-sm:     0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow:        0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg:     0 12px 32px rgba(0, 0, 0, 0.55);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
               Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Контейнер ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 16px;
}
.main-content { padding-top: 20px; padding-bottom: 32px; }
.main-content > .card + .card { margin-top: 20px; }

/* ---------- Шапка ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  letter-spacing: -0.01em;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}

/* ---------- Переключатель темы ---------- */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-soft);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
  -webkit-appearance: none;
  appearance: none;
}
.theme-toggle:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--surface-hover);
}
.theme-toggle:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}
.theme-icon {
  display: block;
}
.theme-icon-sun { display: none; }
[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="dark"] .theme-icon-sun { display: block; }

/* ---------- Панель ссылок-инструкций ---------- */
.links-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.link-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-soft);
  box-shadow: var(--shadow-sm);
  transition: border-color .15s ease, color .15s ease, transform .15s ease;
}
.link-chip svg { color: var(--primary); }
.link-chip:hover { color: var(--primary); border-color: var(--primary); text-decoration: none; }

/* ---------- Карточка ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header {
  padding: 20px 24px 8px;
}
.card-body { padding: 8px 24px 24px; }
.card-title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}
.card-subtitle {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--text-muted);
}

/* Результат — акцентная шапка */
.result-card .result-header {
  background: linear-gradient(135deg, var(--primary-soft), var(--result-header-end));
  border-bottom: 1px solid var(--border);
  padding: 20px 24px;
}

/* ---------- Форма ---------- */
.qr-form { display: block; }
.field-group { margin-bottom: 16px; }
.field-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 6px;
}

.field-control {
  width: 100%;
  height: 46px;
  padding: 10px 14px;
  font-size: 16px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
  -webkit-appearance: none;
  appearance: none;
}
.field-control::placeholder { color: var(--placeholder); }
.field-control:hover { background: var(--surface-hover); }
.field-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--focus-ring);
  background: var(--surface);
}

/* иконка внутри поля */
.input-icon { position: relative; }
.input-icon .input-ico {
  position: absolute;
  left: 12px; top: 50%;
  transform: translateY(-50%);
  color: var(--placeholder);
  pointer-events: none;
}
.input-icon .field-control { padding-left: 38px; }

/* селект со своей стрелкой */
.select-wrap { position: relative; }
.select { cursor: pointer; padding-right: 40px; }
.select-caret {
  position: absolute;
  right: 14px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* ---------- Разделители секций ---------- */
.section-divider {
  display: flex;
  align-items: center;
  margin: 22px 0 14px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.section-divider::before,
.section-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}
.section-divider span { padding: 0 12px; }

/* ---------- Радио / чекбоксы ---------- */
.radio-group {
  border: 0;
  padding: 0;
  margin: 0 0 8px;
  display: grid;
  gap: 8px;
}
.radio-item, .checkbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease;
  font-size: 15px;
}
.checkbox-item { margin-bottom: 16px; }
.radio-item:hover, .checkbox-item:hover {
  border-color: var(--control-border-hover);
  background: var(--surface-hover);
}

/* скрываем нативный контрол */
.radio-item input[type=radio],
.checkbox-item input[type=checkbox] {
  position: absolute;
  opacity: 0;
  width: 0; height: 0;
}

/* кружок радио */
.radio-mark {
  width: 18px; height: 18px;
  border: 2px solid var(--control-border);
  border-radius: 50%;
  flex: 0 0 auto;
  position: relative;
  transition: border-color .15s ease;
}
.radio-item input:checked ~ .radio-mark { border-color: var(--primary); }
.radio-item input:checked ~ .radio-mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--primary);
}
.radio-item:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); }
.radio-label { user-select: none; }

/* квадратик чекбокса */
.checkbox-mark {
  width: 18px; height: 18px;
  border: 2px solid var(--control-border);
  border-radius: 5px;
  flex: 0 0 auto;
  position: relative;
  transition: border-color .15s ease, background .15s ease;
}
.checkbox-item input:checked ~ .checkbox-mark {
  border-color: var(--primary);
  background: var(--primary);
}
.checkbox-item input:checked ~ .checkbox-mark::after {
  content: "";
  position: absolute;
  left: 4px; top: 0px;
  width: 5px; height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.checkbox-label { user-select: none; }

/* ---------- Поля в ряд ---------- */
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.hint {
  margin: 2px 2px 16px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ---------- Кнопка ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 50px;
  padding: 12px 20px;
  border: 0;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s ease, box-shadow .15s ease, transform .05s ease;
  -webkit-appearance: none;
  appearance: none;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:focus-visible { outline: 3px solid var(--focus-ring); outline-offset: 2px; }

/* ---------- Табличка результата (dl) ---------- */
.details {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.details-row {
  display: grid;
  grid-template-columns: minmax(140px, 38%) 1fr;
  gap: 12px;
  background: var(--surface);
  padding: 11px 14px;
  font-size: 15px;
}
.details-row dt { color: var(--text-muted); }
.details-row dd { margin: 0; color: var(--text); word-break: break-word; }
.details-row-strong dt { color: var(--text); font-weight: 600; }
.details-row-strong dd strong { color: var(--primary-dark); font-size: 17px; }

/* ---------- QR и строка ---------- */
.qr-block {
  display: flex;
  justify-content: center;
  padding: 22px 24px 6px;
}
.qr-image {
  width: auto;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
  background: var(--qr-bg);
}
.qr-string-wrap {
  margin: 10px 24px 22px;
  padding: 14px 16px;
  background: var(--surface-muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
}
.qr-string-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.qr-string {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-soft);
  word-break: break-all;
}

/* ---------- Алерты ---------- */
.alert {
  margin: 0 24px 16px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  line-height: 1.6;
}
.alert-info { background: var(--info-bg); border: 1px solid var(--info-border); color: var(--info-text); }
.alert-danger { background: var(--danger-bg); border: 1px solid var(--danger-border); color: var(--danger); }

/* ---------- Футер ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 24px 0 40px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.7;
}
.site-footer p { margin: 0 0 10px; }
.site-footer .footer-warn b { color: var(--text); }
.site-footer .footer-stat strong { color: var(--text); }

/* ============================================================
   Адаптивность
   ============================================================ */
@media (max-width: 600px) {
  .container { padding: 0 12px; }
  .card-header { padding: 16px 16px 6px; }
  .card-body { padding: 6px 16px 18px; }
  .result-card .result-header { padding: 16px; }
  .card-title { font-size: 18px; }
  .field-row { grid-template-columns: 1fr; }
  .details-row {
    grid-template-columns: 1fr;
    gap: 2px;
  }
  .details-row dt { font-size: 13px; }
  .alert { margin: 0 16px 14px; }
  .qr-block { padding: 16px 16px 4px; }
  .qr-string-wrap { margin: 8px 16px 16px; }
  .brand-text { font-size: 16px; }
  .link-chip { font-size: 12.5px; padding: 7px 11px; }
}

@media (max-width: 360px) {
  .field-control { font-size: 15px; }
  .btn { font-size: 15px; }
}

/* Пользовательские настройки доступности */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}