:root {
    --color-bg: #f4f5f7;
    --color-surface: #ffffff;
    --color-text: #1f2430;
    --color-muted: #6b7280;
    --color-accent: #2563eb;
    --color-accent-soft: #eef2ff;
    --color-error: #dc2626;
    --color-error-soft: #fee2e2;
    --color-ok: #16a34a;
    --color-ok-soft: #dcfce7;
    --color-warn: #b45309;
    --color-warn-soft: #fef3c7;
    --color-border: #e5e7eb;
    --color-border-strong: #d1d5db;
    --color-on-accent: #ffffff;
    --radius: 8px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
}

[x-cloak] { display: none !important; }

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

/* ---- Шапка ---- */
.topnav {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 24px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.topnav__brand {
    font-weight: 700;
    font-size: 18px;
    color: var(--color-text);
}
.topnav__brand:hover { text-decoration: none; }

.topnav__center {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
    flex: 1;
}

.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--active {
    color: var(--color-accent);
    background: var(--color-accent-soft);
    font-weight: 600;
}

.topnav__right {
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.topnav__gear { font-size: 14px; color: var(--color-muted); white-space: nowrap; }

.topnav__user {
    position: relative;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: var(--radius);
    font-size: 14px;
}
.topnav__user:hover { background: var(--color-bg); }

.topnav__menu {
    position: absolute;
    right: 0;
    top: calc(100% + 4px);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    min-width: 160px;
    padding: 4px;
    display: flex;
    flex-direction: column;
}
.topnav__menu a, .topnav__menu-logout {
    padding: 8px 10px;
    border-radius: 6px;
    color: var(--color-text);
    text-align: left;
    background: none;
    border: none;
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
}
.topnav__menu a:hover, .topnav__menu-logout:hover { background: var(--color-bg); text-decoration: none; }

/* ---- Контент ---- */
.page { max-width: 1200px; margin: 0 auto; padding: 24px; }

.stub { text-align: center; padding: 80px 20px; color: var(--color-muted); }
.stub h1 { color: var(--color-text); }

/* ---- Форма входа ---- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-form {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 32px;
    width: 100%;
    max-width: 360px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.login-form__title { margin: 0 0 8px; text-align: center; font-size: 20px; }

.field { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--color-muted); }
.field input {
    padding: 10px 12px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
}
.field input:focus { outline: 2px solid var(--color-accent); outline-offset: 1px; }

.btn {
    padding: 10px 16px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
}
.btn--primary { background: var(--color-accent); color: var(--color-on-accent); }
.btn--primary:hover { opacity: 0.92; }
.btn--block { width: 100%; }

.alert { padding: 10px 12px; border-radius: var(--radius); font-size: 14px; }
.alert--error { background: var(--color-error-soft); color: var(--color-error); }
.alert--ok { background: var(--color-ok-soft); color: var(--color-ok); }
.alert--warn { background: var(--color-warn-soft); color: var(--color-warn); }

/* ---- Тосты ---- */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 100;
}
.toast {
    background: var(--color-text);
    color: var(--color-on-accent);
    padding: 12px 16px;
    border-radius: var(--radius);
    max-width: 320px;
    font-size: 14px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.toast--error { background: var(--color-error); }

/* ---- Настройки ---- */
.settings { display: flex; flex-direction: column; gap: 20px; max-width: 560px; margin: 0 auto; }
.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.card h2 { margin-top: 0; font-size: 16px; }
.settings-form { display: flex; flex-direction: column; gap: 12px; margin-top: 12px; }
.muted { color: var(--color-muted); font-size: 13px; }
.btn:not(.btn--primary) { background: var(--color-bg); color: var(--color-text); border: 1px solid var(--color-border-strong); }
.btn:not(.btn--primary):hover { background: var(--color-border); }

/* ---- Себестоимость: плитки ---- */
.tiles {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}
.tile {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    text-align: center;
    color: var(--color-text);
}
.tile__value { font-size: 24px; font-weight: 700; }
.tile__label { font-size: 13px; color: var(--color-muted); margin-top: 4px; }
.tile--warn { background: var(--color-warn-soft); }
.tile--warn .tile__value { color: var(--color-warn); }
.tile--link { text-decoration: none; cursor: pointer; }
.tile--link:hover { opacity: 0.9; text-decoration: none; }

/* ---- Плашка устаревшего каталога ---- */
.stale-banner {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--color-warn-soft);
    color: var(--color-warn);
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 14px;
    margin-bottom: 16px;
}

/* ---- Панель управления ---- */
.costs-toolbar { display: flex; justify-content: flex-end; margin-bottom: 12px; }
.costs-toolbar__sync { display: flex; align-items: center; gap: 10px; font-size: 13px; }

.costs-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}
.costs-controls select, .costs-controls__search {
    padding: 8px 10px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
}
.costs-controls__search { flex: 1; min-width: 200px; }

/* ---- Таблица товаров ---- */
.costs-table-wrap { overflow-x: auto; }
.costs-table { width: 100%; border-collapse: collapse; background: var(--color-surface); border-radius: var(--radius); overflow: hidden; }
.costs-table th {
    text-align: left;
    font-size: 12px;
    text-transform: uppercase;
    color: var(--color-muted);
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
}
.costs-table td { padding: 10px 12px; border-bottom: 1px solid var(--color-border); vertical-align: middle; font-size: 14px; }
.costs-empty { text-align: center; color: var(--color-muted); padding: 30px; }

.costs-row--missing { border-left: 3px solid var(--color-error); }
.costs-row--archived { opacity: 0.55; }

.costs-row__thumb { width: 56px; height: 56px; object-fit: cover; border-radius: 6px; display: block; background: var(--color-border); }
.costs-row__thumb--placeholder { background: var(--color-border); }

.costs-row__chevron { background: none; border: none; cursor: pointer; color: var(--color-muted); margin-right: 4px; font-size: 12px; }

.costs-row__cost { cursor: pointer; border-bottom: 1px dashed var(--color-muted); }
.costs-row__cost:hover { color: var(--color-accent); }

.costs-row__edit-form { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.costs-row__input { padding: 6px 8px; border: 1px solid var(--color-border-strong); border-radius: 6px; font-size: 13px; width: 90px; font-family: inherit; }
.costs-row__input--date { width: 130px; }

.btn--small { padding: 5px 9px; font-size: 13px; }

.costs-row__history-wrap td { background: var(--color-bg); padding: 12px; }

/* ---- История цен ---- */
.history__table { width: 100%; border-collapse: collapse; font-size: 13px; }
.history__table th, .history__table td { padding: 6px 8px; text-align: left; }
.badge { padding: 2px 8px; border-radius: 999px; font-size: 11px; background: var(--color-border); color: var(--color-muted); }
.badge--ok { background: var(--color-ok-soft); color: var(--color-ok); }
.admin-actions { display: flex; gap: 6px; }

/* ---- Модалка импорта ---- */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 16px;
    z-index: 200;
    overflow-y: auto;
}
.modal {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 24px;
    width: 100%;
    max-width: 640px;
}
.modal h2 { margin-top: 0; }
.import-preview__errors { max-height: 200px; overflow-y: auto; margin: 8px 0 0; padding-left: 20px; }

/* ---- Магазины в настройках ---- */
.settings__section-title { max-width: 560px; margin: 4px auto 0; font-size: 15px; color: var(--color-muted); }
.store-card { max-width: 560px; margin: 0 auto; }
.store-card--inactive { opacity: 0.6; }
.store-card__header { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.store-card__header h3 { margin: 0; font-size: 15px; }
.store-card__actions { display: flex; gap: 8px; margin-top: 10px; }
.alert--warn-text { color: var(--color-warn); }

/* ---- Переключатель магазина в шапке ---- */
.store-switcher { position: relative; }
.store-switcher__button {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-weight: 700;
    font-size: 18px;
    color: var(--color-text);
    padding: 4px 8px;
    border-radius: var(--radius);
}
.store-switcher__button:hover { background: var(--color-bg); }
.store-switcher__chevron { font-size: 11px; color: var(--color-muted); }
.store-switcher__menu {
    position: absolute;
    left: 0;
    top: calc(100% + 4px);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    min-width: 220px;
    padding: 4px;
    z-index: 60;
}
.store-switcher__item {
    display: block;
    width: 100%;
    text-align: left;
    padding: 8px 10px;
    border-radius: 6px;
    background: none;
    border: none;
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    cursor: pointer;
}
.store-switcher__item:hover { background: var(--color-bg); }
.store-switcher__item--active { color: var(--color-accent); font-weight: 600; }

/* ---- Мобильная адаптация ---- */
@media (max-width: 720px) {
    .topnav { flex-wrap: wrap; padding: 10px 12px; }
    .topnav__center { order: 3; width: 100%; justify-content: flex-start; overflow-x: auto; }
    .page { padding: 16px; }

    .tiles { grid-template-columns: repeat(2, 1fr); }

    /* Таблица себестоимости -> карточки */
    .costs-table thead { display: none; }
    .costs-table, .costs-table tbody, .costs-table tr, .costs-table td { display: block; width: 100%; }
    .costs-table tr.costs-row {
        border: 1px solid var(--color-border);
        border-radius: var(--radius);
        margin-bottom: 10px;
        padding: 10px;
    }
    .costs-table tr.costs-row--missing { border-left: 3px solid var(--color-error); }
    .costs-table td { border-bottom: none; padding: 4px 0; }
    .costs-table td[data-label]::before {
        content: attr(data-label);
        display: block;
        font-size: 11px;
        text-transform: uppercase;
        color: var(--color-muted);
    }
    .costs-row__history-wrap { margin-bottom: 10px; }
    .costs-row__history-wrap td { background: var(--color-bg); border-radius: var(--radius); }
}