:root {
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-text: #1c2128;
  --color-muted: #6b7280;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-ok: #16a34a;
  --color-ok-bg: #f0fdf4;
  --color-warn: #d97706;
  --color-warn-bg: #fffbeb;
  --color-border: #e5e7eb;
  --radius: 8px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.45;
}

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

/* ---- Навигация ---- */
.topnav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 20px;
  height: 56px;
}

.topnav__brand {
  font-weight: 700;
  font-size: 16px;
  white-space: nowrap;
  color: var(--color-text);
}

.topnav__tabs {
  display: flex;
  gap: 4px;
  flex: 1;
  justify-content: center;
  overflow-x: auto;
}

.topnav__tab {
  padding: 8px 12px;
  border-radius: var(--radius);
  color: var(--color-muted);
  font-size: 14px;
  white-space: nowrap;
}
.topnav__tab:hover { background: var(--color-bg); text-decoration: none; }
.topnav__tab.is-active {
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  font-weight: 600;
}

.topnav__right {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.topnav__icon-btn {
  color: var(--color-muted);
  padding: 6px 8px;
  border-radius: var(--radius);
}
.topnav__icon-btn:hover { background: var(--color-bg); text-decoration: none; }

.user-menu { position: relative; }
.user-menu__trigger {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid transparent;
}
.user-menu__dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  min-width: 180px;
  overflow: hidden;
}
.user-menu__dropdown a, .user-menu__dropdown button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  color: var(--color-text);
  background: none;
  border: none;
  font-size: 14px;
  cursor: pointer;
}
.user-menu__dropdown a:hover, .user-menu__dropdown button:hover {
  background: var(--color-bg);
  text-decoration: none;
}

/* ---- Каркас страницы ---- */
.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.page__title {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 16px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

/* ---- Формы ---- */
.form-field { margin-bottom: 16px; }
.form-field label {
  display: block;
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 6px;
}
.form-field input, .form-field select, .form-field textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: -1px;
}
.form-hint { font-size: 12px; color: var(--color-muted); margin-top: 4px; }
.form-error { color: var(--color-error); font-size: 13px; margin-top: 8px; }

/* ---- Кнопки ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}
.btn:hover { background: var(--color-bg); text-decoration: none; }
.btn-primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-danger { color: var(--color-error); border-color: var(--color-error); }

/* ---- Логин ---- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
}
.login-card { width: 100%; max-width: 360px; }
.login-card h1 { font-size: 20px; margin: 0 0 4px; }
.login-card p.sub { color: var(--color-muted); font-size: 14px; margin: 0 0 20px; }

/* ---- Плитки статистики ---- */
.tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}
.tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.tile__value { font-size: 22px; font-weight: 700; }
.tile__label { font-size: 13px; color: var(--color-muted); margin-top: 2px; }
.tile--warn { cursor: pointer; }
.tile--warn .tile__value { color: var(--color-warn); }
.tile--warn.is-active { border-color: var(--color-warn); background: var(--color-warn-bg); }

/* ---- Плашка предупреждения ---- */
.banner {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
}
.banner--warn { background: var(--color-warn-bg); color: var(--color-warn); border: 1px solid var(--color-warn); }
.banner--ok { background: var(--color-ok-bg); color: var(--color-ok); border: 1px solid var(--color-ok); }
.banner--error { background: var(--color-error-bg); color: var(--color-error); border: 1px solid var(--color-error); }

/* ---- Панель фильтров ---- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
}
.toolbar input[type="search"], .toolbar select {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--color-surface);
  color: var(--color-text);
}
.toolbar .spacer { flex: 1; }

/* ---- Таблица товаров ---- */
table.costs-table { width: 100%; border-collapse: collapse; background: var(--color-surface); border-radius: var(--radius); overflow: hidden; }
table.costs-table th {
  text-align: left;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-muted);
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
}
table.costs-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
table.costs-table tr.row--missing { box-shadow: inset 3px 0 0 var(--color-warn); }
table.costs-table img.thumb {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 6px;
  background: var(--color-bg);
}
.thumb-placeholder {
  width: 56px;
  height: 56px;
  border-radius: 6px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}
.cost-value { cursor: pointer; font-weight: 600; }
.cost-value:hover { text-decoration: underline; }
.chevron-btn { background: none; border: none; cursor: pointer; color: var(--color-muted); font-size: 16px; }
.history-row td { background: var(--color-bg); font-size: 13px; }
.history-row table { width: 100%; }
.history-row td.hist-cell { padding: 4px 8px; }

/* ---- Мобильные карточки (вместо таблицы) ---- */
.cost-cards { display: none; }
.cost-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px;
  margin-bottom: 10px;
  display: flex;
  gap: 12px;
}
.cost-card.row--missing { box-shadow: inset 3px 0 0 var(--color-warn); }
.cost-card__body { flex: 1; min-width: 0; }
.cost-card__name { font-weight: 600; font-size: 14px; }
.cost-card__meta { color: var(--color-muted); font-size: 12px; margin-top: 2px; }
.cost-card__cost { margin-top: 8px; }

@media (max-width: 720px) {
  .tiles { grid-template-columns: repeat(2, 1fr); }
  table.costs-table { display: none; }
  .cost-cards { display: block; }
  .topnav__tabs { display: none; }
}

/* ---- Тосты ---- */
#toast-root {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  background: var(--color-text);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  max-width: 360px;
}
.toast--error { background: var(--color-error); }

/* ---- Заглушка ---- */
.stub-wrap { text-align: center; padding: 80px 20px; color: var(--color-muted); }
.stub-wrap h1 { color: var(--color-text); font-size: 24px; }

table.plain { width: 100%; border-collapse: collapse; }
table.plain th, table.plain td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--color-border); font-size: 14px; }
table.plain th { color: var(--color-muted); font-weight: 500; font-size: 12px; text-transform: uppercase; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge--owner { background: var(--color-accent); color: #fff; }
.badge--employee { background: var(--color-bg); color: var(--color-muted); }
.badge--inactive { background: var(--color-error-bg); color: var(--color-error); }