/* ==========================================================================
   PhoneStore — Storefront phong cách CellphoneS
   Palette: đỏ cam chủ đạt #e8380d, nền trắng, chữ xám than
   ========================================================================== */

:root {
    --brand: #e8380d;
    --brand-dark: #c72a08;
    --brand-soft: #fff1ec;
    --ink: #23262b;
    --ink-soft: #5b6472;
    --line: #e6e8ec;
    --bg: #f5f6f8;
    --white: #fff;
    --amber: #f5a623;
    --green: #1aab40;
    --blue: #1a7ee0;
    --radius: 8px;
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, .06);
    --shadow-md: 0 4px 16px rgba(16, 24, 40, .09);
    --shadow-lg: 0 12px 32px rgba(16, 24, 40, .14);
    --container: 1200px;
    --font: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: var(--font);
    color: var(--ink);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; display: flex; flex-direction: column; }
.app { flex: 1 0 auto; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 16px; }

/* ---------- Topbar ---------- */
.topbar {
    background: #fff;
    border-bottom: 1px solid var(--line);
    font-size: 12.5px;
    color: var(--ink-soft);
}
.topbar__inner { display: flex; align-items: center; justify-content: space-between; height: 34px; gap: 12px; }
.topbar__left, .topbar__right { display: flex; align-items: center; gap: 10px; }
.topbar__hotline strong { color: var(--brand); }
.topbar__link:hover { color: var(--brand); }
.topbar__divider { width: 1px; height: 12px; background: var(--line); }

/* ---------- Header ---------- */
.header { background: #fff; box-shadow: var(--shadow-sm); position: sticky; top: 0; z-index: 40; }
.header__inner { display: flex; align-items: center; gap: 22px; padding: 12px 16px; }

.logo { display: flex; align-items: center; gap: 9px; flex-shrink: 0; }
.logo__mark { width: 36px; height: 36px; border-radius: 9px; background: var(--brand); color: #fff; display: grid; place-items: center; }
.logo__mark svg { width: 21px; height: 21px; }
.logo__text { font-size: 22px; font-weight: 800; letter-spacing: -.5px; }
.logo__text em { font-style: normal; color: var(--brand); }

.search { flex: 1; position: relative; max-width: 640px; }
.search__box {
    display: flex; align-items: center;
    border: 2px solid var(--brand); border-radius: var(--radius); overflow: hidden; background: #fff;
}
.search__box input {
    flex: 1; border: 0; outline: 0; padding: 10px 14px; font-size: 14px; background: transparent;
}
.search__btn {
    border: 0; background: var(--brand); color: #fff; width: 46px; height: 42px; cursor: pointer; display: grid; place-items: center;
}
.search__btn:hover { background: var(--brand-dark); }
.search__btn svg { width: 19px; height: 19px; }
.search__suggest {
    position: absolute; top: calc(100% + 6px); left: 0; right: 0; background: #fff;
    border-radius: var(--radius); box-shadow: var(--shadow-lg); border: 1px solid var(--line); overflow: hidden; z-index: 50;
}
.search__suggest a { display: flex; gap: 10px; align-items: center; padding: 9px 14px; border-bottom: 1px solid #f1f2f4; }
.search__suggest a:last-child { border-bottom: 0; }
.search__suggest a:hover { background: var(--brand-soft); }
.search__suggest small { color: var(--ink-soft); margin-left: auto; }

.header__actions { display: flex; align-items: center; gap: 18px; margin-left: auto; }
.header__action { display: flex; align-items: center; gap: 8px; font-size: 12.5px; line-height: 1.35; color: var(--ink); }
.header__action svg { width: 24px; height: 24px; color: var(--brand); }
.header__action small { color: var(--ink-soft); font-size: 11.5px; }
.header__action:hover span { color: var(--brand); }
.cart-icon { position: relative; display: block; }
.cart-badge {
    position: absolute; top: -6px; right: -8px; background: var(--brand); color: #fff;
    font-size: 10.5px; font-weight: 700; min-width: 17px; height: 17px; border-radius: 9px;
    display: grid; place-items: center; padding: 0 4px;
}

/* ---------- Category bar ---------- */
.categorybar { border-top: 1px solid var(--line); background: #fff; }
.categorybar__inner { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.categorybar__inner::-webkit-scrollbar { display: none; }
.category-link {
    padding: 11px 14px; font-size: 13.5px; font-weight: 600; white-space: nowrap;
    border-bottom: 2px solid transparent; color: var(--ink);
}
.category-link--all { color: var(--brand); }
.category-link:hover, .category-link.is-active { color: var(--brand); border-bottom-color: var(--brand); }

/* ---------- Hero ---------- */
.hero { background: linear-gradient(115deg, #23262b 0%, #3b2020 55%, #7a2410 100%); color: #fff; }
.hero__inner { display: grid; grid-template-columns: 1.15fr 1fr; gap: 34px; padding: 40px 16px 46px; align-items: center; }
.hero__eyebrow { display: inline-block; background: var(--brand); padding: 5px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; letter-spacing: .4px; }
.hero__title { font-size: 34px; line-height: 1.2; margin: 14px 0 10px; font-weight: 800; }
.hero__desc { color: #d9dce2; font-size: 15px; margin: 0 0 22px; max-width: 52ch; }
.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__stats { display: flex; gap: 26px; margin-top: 26px; }
.hero__stat b { display: block; font-size: 22px; color: #ffb199; }
.hero__stat span { font-size: 12.5px; color: #c3c7cf; }
.hero__banner {
    background: #fff; color: var(--ink); border-radius: 14px; padding: 22px; box-shadow: var(--shadow-lg);
}
.hero__banner h3 { margin: 0 0 4px; font-size: 19px; }
.hero__banner p { margin: 0 0 14px; color: var(--ink-soft); font-size: 13px; }
.hero__banner-row { display: flex; justify-content: space-between; align-items: center; padding: 9px 0; border-top: 1px dashed var(--line); font-size: 13.5px; }
.hero__banner-row b { color: var(--brand); font-size: 16px; }

/* ---------- Section ---------- */
.section { padding: 30px 0 10px; }
.section__head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.section__head h2 { margin: 0; font-size: 21px; font-weight: 800; }
.section__head p { margin: 0; color: var(--ink-soft); font-size: 13px; }
.section__head a { margin-left: auto; color: var(--brand); font-size: 13px; font-weight: 600; }

/* ---------- Promo tiles ---------- */
.promo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.promo-tile {
    background: #fff; border-radius: 12px; padding: 16px; box-shadow: var(--shadow-sm);
    border-top: 3px solid var(--brand); display: block;
}
.promo-tile b { display: block; font-size: 14.5px; margin-bottom: 4px; }
.promo-tile span { color: var(--ink-soft); font-size: 12.5px; }
.promo-tile:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.promo-tile--blue { border-top-color: var(--blue); }
.promo-tile--green { border-top-color: var(--green); }
.promo-tile--amber { border-top-color: var(--amber); }

/* ---------- Product grid / card ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.product-card {
    background: #fff; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-sm);
    display: flex; flex-direction: column; position: relative; transition: box-shadow .18s, transform .18s;
}
.product-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.product-card__media { position: relative; background: #fafbfc; aspect-ratio: 1/1; display: grid; place-items: center; padding: 16px; }
.product-card__media img { max-height: 100%; object-fit: contain; }
.product-card__thumb {
    width: 100%; height: 100%; border-radius: 10px;
    background: linear-gradient(140deg, #e9ecf1, #d7dbe3);
    display: grid; place-items: center; color: #8b93a1; font-size: 42px; font-weight: 700;
}
.product-card__badges { position: absolute; top: 8px; left: 8px; display: flex; flex-direction: column; gap: 5px; }
.product-card__wish {
    position: absolute; top: 8px; right: 8px; z-index: 2;
    width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--line);
    background: rgba(255, 255, 255, .92); color: #b8bec8; cursor: pointer; font-size: 15px;
    display: grid; place-items: center; line-height: 1;
}
.product-card__wish:hover { color: var(--brand); border-color: var(--brand); }
.product-card__wish.is-active { color: var(--brand); border-color: var(--brand); background: var(--brand-soft); }
.product-card__rating { display: flex; align-items: center; gap: 6px; font-size: 11.5px; color: var(--ink-soft); }
.badge { font-size: 10.5px; font-weight: 700; padding: 3px 7px; border-radius: 4px; color: #fff; background: var(--brand); }
.badge--muted { background: #4b5563; }
.badge--new { background: var(--green); }
.badge--hot { background: var(--amber); }
.product-card__body { padding: 12px 13px 14px; display: flex; flex-direction: column; gap: 7px; flex: 1; }
.product-card__name { font-size: 14px; font-weight: 600; line-height: 1.35; min-height: 38px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-card__name:hover { color: var(--brand); }
.product-card__meta { font-size: 12px; color: var(--ink-soft); }
.product-card__price { font-size: 17px; font-weight: 800; color: var(--brand); }
.product-card__price del { display: block; font-size: 12px; color: #9aa1ab; font-weight: 500; }
.product-card__note { font-size: 11.5px; color: var(--green); font-weight: 600; }
.product-card__actions { margin-top: auto; display: flex; gap: 8px; padding-top: 4px; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 7px;
    border: 1px solid transparent; border-radius: 6px; padding: 9px 15px;
    font-size: 13.5px; font-weight: 600; cursor: pointer; transition: background .15s, border-color .15s, color .15s;
    background: #f1f2f4; color: var(--ink);
}
.btn:hover { background: #e6e8ec; }
.btn--primary { background: var(--brand); color: #fff; }
.btn--primary:hover { background: var(--brand-dark); }
.btn--outline { background: #fff; border-color: var(--brand); color: var(--brand); }
.btn--outline:hover { background: var(--brand-soft); }
.btn--ghost { background: transparent; border-color: var(--line); color: var(--ink-soft); }
.btn--ghost:hover { border-color: #c9ced6; color: var(--ink); }
.btn--block { width: 100%; }
.btn--sm { padding: 6px 11px; font-size: 12.5px; }
.btn--danger { background: #d93a3a; color: #fff; }
.btn--danger:hover { background: #bd2f2f; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { display: flex; gap: 8px; align-items: center; font-size: 12.5px; color: var(--ink-soft); padding: 14px 0; flex-wrap: wrap; }
.breadcrumb a:hover { color: var(--brand); }

/* ---------- Layout: list page ---------- */
.list-layout { display: grid; grid-template-columns: 244px 1fr; gap: 18px; align-items: start; padding-bottom: 40px; }
.panel { background: #fff; border-radius: 12px; box-shadow: var(--shadow-sm); }
.panel__head { padding: 14px 16px; border-bottom: 1px solid var(--line); font-weight: 700; font-size: 14.5px; display: flex; align-items: center; justify-content: space-between; }
.panel__body { padding: 14px 16px; }
.filter-group { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.filter-group:last-child { border-bottom: 0; }
.filter-group h4 { margin: 0 0 10px; font-size: 13.5px; }
.filter-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.filter-list button {
    border: 0; background: none; padding: 0; text-align: left; cursor: pointer; font-size: 13px; color: var(--ink-soft);
    display: flex; justify-content: space-between; width: 100%; gap: 8px;
}
.filter-list button:hover { color: var(--brand); }
.filter-list button.is-active { color: var(--brand); font-weight: 700; }
.filter-list em { font-style: normal; font-size: 11.5px; color: #a5abb5; }
.price-inputs { display: flex; gap: 8px; align-items: center; }
.price-inputs input {
    width: 100%; border: 1px solid var(--line); border-radius: 6px; padding: 7px 9px; font-size: 13px; outline: 0;
}
.price-inputs input:focus { border-color: var(--brand); }

.list-toolbar {
    display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
    padding: 12px 16px; background: #fff; border-radius: 12px; box-shadow: var(--shadow-sm); margin-bottom: 14px;
}
.list-toolbar__count { font-size: 13.5px; color: var(--ink-soft); }
.list-toolbar__count b { color: var(--brand); }
.sort-tabs { display: flex; gap: 4px; margin-left: auto; }
.sort-tabs button {
    border: 1px solid var(--line); background: #fff; border-radius: 6px; padding: 7px 12px; font-size: 12.5px; cursor: pointer;
}
.sort-tabs button.is-active { border-color: var(--brand); color: var(--brand); font-weight: 700; background: var(--brand-soft); }

/* ---------- Pagination ---------- */
.pagination { display: flex; gap: 6px; justify-content: center; padding: 22px 0 8px; flex-wrap: wrap; }
.pagination button {
    min-width: 34px; height: 34px; border: 1px solid var(--line); background: #fff; border-radius: 6px; cursor: pointer; font-size: 13px;
}
.pagination button.is-active { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 700; }
.pagination button[disabled] { opacity: .45; cursor: not-allowed; }

/* ---------- Product detail ---------- */
.detail { display: grid; grid-template-columns: 420px 1fr; gap: 28px; background: #fff; border-radius: 14px; padding: 24px; box-shadow: var(--shadow-sm); margin-bottom: 20px; }
.detail__gallery { position: sticky; top: 132px; align-self: start; }
.detail__main-image { aspect-ratio: 1/1; border-radius: 12px; background: #f7f8fa; display: grid; place-items: center; overflow: hidden; }
.detail__thumbs { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.detail__thumbs button { width: 62px; height: 62px; border-radius: 8px; border: 2px solid var(--line); background: #f7f8fa; overflow: hidden; cursor: pointer; padding: 0; }
.detail__thumbs button.is-active { border-color: var(--brand); }
.detail__title { font-size: 24px; margin: 0 0 8px; font-weight: 800; }
.detail__sub { color: var(--ink-soft); font-size: 13.5px; margin-bottom: 16px; }
.detail__price-box { background: var(--brand-soft); border-radius: 10px; padding: 14px 16px; margin-bottom: 16px; }
.detail__price { font-size: 26px; font-weight: 800; color: var(--brand); }
.detail__price del { font-size: 14px; color: #98a0ac; margin-left: 10px; font-weight: 500; }
.detail__save { font-size: 12.5px; color: var(--green); margin-top: 4px; font-weight: 600; }
.detail__row { margin-bottom: 16px; }
.detail__row h4 { margin: 0 0 8px; font-size: 13.5px; }
.option-list { display: flex; gap: 8px; flex-wrap: wrap; }
.option {
    border: 1.5px solid var(--line); background: #fff; border-radius: 7px; padding: 8px 13px; cursor: pointer; font-size: 13px;
}
.option:hover { border-color: #f0a58f; }
.option.is-active { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); font-weight: 700; }
.detail__actions { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.detail__actions .btn { padding: 12px 22px; font-size: 14.5px; }
.detail__promo { background: #fff8f5; border: 1px dashed #ffbca8; border-radius: 10px; padding: 12px 14px; margin-top: 16px; font-size: 13px; }
.detail__promo b { color: var(--brand); }
.spec-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.spec-table td { padding: 10px 12px; border-bottom: 1px solid var(--line); }
.spec-table td:first-child { width: 190px; color: var(--ink-soft); font-weight: 600; }

/* ---------- Cart ---------- */
.cart-layout { display: grid; grid-template-columns: 1fr 330px; gap: 18px; align-items: start; padding-bottom: 40px; }
.cart-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.cart-table th { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); font-size: 12.5px; color: var(--ink-soft); text-transform: uppercase; }
.cart-table td { padding: 14px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.qty { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.qty button { width: 30px; height: 30px; border: 0; background: #f6f7f9; cursor: pointer; font-size: 15px; }
.qty span { min-width: 38px; text-align: center; font-size: 13.5px; }
.summary-row { display: flex; justify-content: space-between; padding: 8px 0; font-size: 13.5px; }
.summary-row--total { border-top: 1px solid var(--line); margin-top: 8px; padding-top: 12px; font-size: 16px; font-weight: 800; }
.summary-row--total b { color: var(--brand); font-size: 20px; }
.empty-state { text-align: center; padding: 56px 20px; }
.empty-state__icon { font-size: 52px; }
.empty-state h3 { margin: 12px 0 6px; }
.empty-state p { color: var(--ink-soft); margin: 0 0 18px; font-size: 14px; }

/* ---------- Forms / auth ---------- */
.auth-card { max-width: 420px; margin: 34px auto; background: #fff; border-radius: 14px; padding: 28px; box-shadow: var(--shadow-md); }
.auth-card h2 { margin: 0 0 4px; font-size: 21px; }
.auth-card > p { margin: 0 0 20px; color: var(--ink-soft); font-size: 13.5px; }
.form { display: flex; flex-direction: column; gap: 14px; }
.form__hint { font-size: 12.5px; color: var(--ink-soft); margin: 0; text-align: center; }
.form__hint a { color: var(--brand); font-weight: 600; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field__label { font-size: 12.5px; font-weight: 600; color: var(--ink-soft); }
.field input, .field select, .field textarea {
    border: 1px solid var(--line); border-radius: 7px; padding: 10px 12px; font-size: 14px; outline: 0; background: #fff; width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--brand); }
.field__error { color: #d93a3a; font-size: 12px; }
.field__hint { font-size: 12px; color: var(--ink-soft); }
.form__grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form__error { background: #fdecec; color: #b32b2b; border-radius: 7px; padding: 10px 12px; font-size: 13px; }

/* ---------- Modal ---------- */
.modal { position: fixed; inset: 0; z-index: 90; display: grid; place-items: center; padding: 18px; }
.modal[hidden] { display: none; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(15, 18, 24, .55); }
.modal__panel {
    position: relative; background: #fff; border-radius: 14px; padding: 26px; width: 100%; max-width: 520px;
    max-height: 88vh; overflow: auto; box-shadow: var(--shadow-lg);
}
.modal__panel--sm { max-width: 400px; }
.modal__close { position: absolute; top: 12px; right: 14px; border: 0; background: none; font-size: 25px; cursor: pointer; color: var(--ink-soft); line-height: 1; }
.modal__title { margin: 0 0 6px; font-size: 19px; }
.modal__subtitle { margin: 0 0 16px; color: var(--ink-soft); font-size: 13px; }
.demo-accounts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 18px; }
.demo-account {
    border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 9px 6px; cursor: pointer; text-align: center; font-size: 12px;
}
.demo-account:hover { border-color: var(--brand); background: var(--brand-soft); }
.demo-account strong { display: block; font-size: 12.5px; }
.demo-account span { color: var(--ink-soft); font-size: 10.5px; word-break: break-all; }

/* ---------- Account / order list ---------- */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 18px; overflow-x: auto; }
.tabs button {
    border: 0; background: none; padding: 12px 16px; font-size: 14px; cursor: pointer; color: var(--ink-soft);
    border-bottom: 2px solid transparent; white-space: nowrap;
}
.tabs button.is-active { color: var(--brand); border-bottom-color: var(--brand); font-weight: 700; }
.order-card { background: #fff; border-radius: 12px; padding: 16px; box-shadow: var(--shadow-sm); margin-bottom: 12px; }
.order-card__head { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; padding-bottom: 12px; border-bottom: 1px dashed var(--line); }
.order-card__no { font-weight: 700; font-size: 14px; }
.order-card__date { color: var(--ink-soft); font-size: 12.5px; }
.order-card__total { margin-left: auto; font-weight: 800; color: var(--brand); font-size: 16px; }
.order-card__items { padding: 12px 0; display: flex; flex-direction: column; gap: 10px; }
.order-item-row { display: flex; gap: 12px; align-items: center; }
.order-item-row__thumb { width: 52px; height: 52px; border-radius: 8px; background: #f0f2f5; display: grid; place-items: center; overflow: hidden; flex-shrink: 0; }
.order-item-row__info { flex: 1; font-size: 13.5px; }
.order-item-row__info span { display: block; color: var(--ink-soft); font-size: 12px; }
.order-card__foot { display: flex; gap: 10px; align-items: center; justify-content: flex-end; padding-top: 12px; border-top: 1px dashed var(--line); flex-wrap: wrap; }

.status-chip { font-size: 11.5px; font-weight: 700; padding: 4px 10px; border-radius: 999px; }
.status-chip--pending { background: #fff4e0; color: #b9791b; }
.status-chip--confirmed { background: #e8f1fd; color: #1a6dc4; }
.status-chip--shipping { background: #eceaff; color: #4b3fd1; }
.status-chip--delivered { background: #e7f7ec; color: #16803a; }
.status-chip--cancelled, .status-chip--failed { background: #fdecec; color: #b32b2b; }

/* ---------- Toast ---------- */
.toast-stack { position: fixed; right: 18px; bottom: 18px; z-index: 120; display: flex; flex-direction: column; gap: 9px; }
.toast {
    background: #23262b; color: #fff; border-radius: 9px; padding: 11px 15px; font-size: 13.5px; box-shadow: var(--shadow-lg);
    animation: toast-in .22s ease-out; max-width: 330px;
}
.toast--success { background: #147d33; }
.toast--error { background: #c92a2a; }
@keyframes toast-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ---------- Info page / mockup ---------- */
.info-page { background: #fff; border-radius: 14px; padding: 28px; box-shadow: var(--shadow-sm); margin-bottom: 40px; }
.info-page h2 { margin: 0 0 8px; font-size: 22px; }
.info-page h3 { margin: 22px 0 8px; font-size: 16px; }
.info-page p, .info-page li { font-size: 14px; color: #454b55; line-height: 1.7; }
.info-page ul { padding-left: 20px; }
.mock-banner {
    display: flex; gap: 10px; align-items: center; background: #fff8e6; border: 1px dashed #f0c674;
    border-radius: 10px; padding: 12px 14px; font-size: 13px; color: #8a6412; margin-bottom: 18px;
}
.mock-banner b { color: #7a5608; }
.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.info-tile { background: var(--bg); border-radius: 10px; padding: 16px; }
.info-tile b { display: block; margin-bottom: 4px; font-size: 14px; }
.info-tile span { font-size: 13px; color: var(--ink-soft); }
.store-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.store-card { background: #fff; border-radius: 12px; padding: 16px; box-shadow: var(--shadow-sm); }
.store-card b { display: block; font-size: 14.5px; margin-bottom: 6px; }
.store-card span { display: block; font-size: 12.5px; color: var(--ink-soft); margin-bottom: 3px; }

/* ---------- Admin ---------- */
.admin-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 18px; }
.admin-stat { background: #fff; border-radius: 12px; padding: 16px; box-shadow: var(--shadow-sm); }
.admin-stat b { display: block; font-size: 24px; color: var(--brand); }
.admin-stat span { font-size: 12.5px; color: var(--ink-soft); }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; background: #fff; }
.data-table th, .data-table td { padding: 11px 13px; border-bottom: 1px solid var(--line); text-align: left; }
.data-table th { font-size: 12px; color: var(--ink-soft); text-transform: uppercase; background: #fafbfc; }

/* ---------- Loading ---------- */
.loading { display: grid; place-items: center; padding: 60px 0; color: var(--ink-soft); gap: 12px; }
.spinner {
    width: 34px; height: 34px; border: 3px solid var(--line); border-top-color: var(--brand);
    border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Banner carousel (CellphoneS style) ---------- */
.carousel { position: relative; overflow: hidden; border-radius: 14px; }
.carousel__track { display: flex; transition: transform .45s cubic-bezier(.4, 0, .2, 1); }
.carousel__slide { min-width: 100%; }
.banner {
    min-height: 320px; padding: 40px 46px; color: #fff; display: flex; flex-direction: column; justify-content: center;
}
.banner--red { background: linear-gradient(120deg, #e8380d 0%, #b32303 60%, #7a2410 100%); }
.banner--dark { background: linear-gradient(120deg, #23262b 0%, #3b2020 55%, #7a2410 100%); }
.banner--blue { background: linear-gradient(120deg, #123a63 0%, #1a7ee0 60%, #0d2b4a 100%); }
.banner__eyebrow { display: inline-block; align-self: flex-start; background: rgba(255, 255, 255, .2); padding: 5px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; letter-spacing: .4px; }
.banner__title { font-size: 34px; line-height: 1.2; margin: 14px 0 10px; font-weight: 800; max-width: 20ch; }
.banner__desc { color: rgba(255, 255, 255, .9); font-size: 14.5px; margin: 0 0 22px; max-width: 48ch; }
.carousel__dots { position: absolute; bottom: 16px; left: 46px; display: flex; gap: 7px; }
.carousel__dots button {
    width: 9px; height: 9px; border-radius: 50%; border: 0; padding: 0; cursor: pointer;
    background: rgba(255, 255, 255, .5); transition: width .2s, background .2s;
}
.carousel__dots button.is-active { width: 24px; border-radius: 5px; background: #fff; }
.carousel__arrows { position: absolute; top: 50%; transform: translateY(-50%); right: 16px; display: flex; flex-direction: column; gap: 8px; }
.carousel__arrows button {
    width: 34px; height: 34px; border-radius: 50%; border: 0; cursor: pointer;
    background: rgba(255, 255, 255, .25); color: #fff; font-size: 15px; display: grid; place-items: center;
}
.carousel__arrows button:hover { background: rgba(255, 255, 255, .45); }

/* ---------- Flash sale ---------- */
.flash-sale { background: #fff; border-radius: 14px; box-shadow: var(--shadow-sm); padding: 18px 18px 20px; margin-bottom: 26px; }
.flash-sale__head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.flash-sale__title { font-size: 21px; font-weight: 800; color: var(--brand); margin: 0; }
.countdown { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-soft); }
.countdown__box { background: var(--ink); color: #fff; border-radius: 6px; padding: 4px 8px; font-weight: 700; font-variant-numeric: tabular-nums; min-width: 30px; text-align: center; }
.countdown__box--brand { background: var(--brand); }
.flash-sale__track { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(200px, 1fr); gap: 14px; overflow-x: auto; padding: 16px 2px 6px; scrollbar-width: thin; }
.flash-card { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; display: flex; flex-direction: column; position: relative; }
.flash-card__media { aspect-ratio: 1/1; background: #f7f8fa; display: grid; place-items: center; }
.flash-card__media span { font-size: 40px; font-weight: 700; color: #b6bcc7; }
.flash-card__body { padding: 10px 12px 12px; display: flex; flex-direction: column; gap: 6px; }
.flash-card__name { font-size: 13px; font-weight: 600; line-height: 1.35; min-height: 36px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.flash-card__price { font-size: 16px; font-weight: 800; color: var(--brand); }
.flash-card__price del { font-size: 12px; color: #9aa1ab; font-weight: 500; margin-left: 6px; }
.flash-card__progress { height: 6px; border-radius: 4px; background: #eceef1; overflow: hidden; }
.flash-card__progress span { display: block; height: 100%; background: linear-gradient(90deg, #ff7a45, var(--brand)); }
.flash-card__sold { font-size: 11.5px; color: var(--ink-soft); }
.flash-card__badge { position: absolute; top: 8px; left: 8px; background: var(--brand); color: #fff; font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 4px; }

/* ---------- Service guarantee strip ---------- */
.service-strip { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; margin-bottom: 26px; }
.service-tile { background: #fff; border-radius: 12px; padding: 14px; box-shadow: var(--shadow-sm); display: flex; gap: 10px; align-items: flex-start; }
.service-tile__icon { font-size: 22px; line-height: 1; }
.service-tile b { display: block; font-size: 13px; margin-bottom: 2px; }
.service-tile span { font-size: 11.5px; color: var(--ink-soft); line-height: 1.45; display: block; }

/* ---------- Brand strip ---------- */
.brand-strip { display: grid; grid-template-columns: repeat(7, 1fr); gap: 12px; }
.brand-tile {
    background: #fff; border-radius: 12px; padding: 16px 10px; box-shadow: var(--shadow-sm);
    text-align: center; font-weight: 700; font-size: 14px; color: var(--ink);
}
.brand-tile:hover { color: var(--brand); box-shadow: var(--shadow-md); }
.brand-tile span { display: block; font-size: 11px; font-weight: 500; color: var(--ink-soft); margin-top: 3px; }

/* ---------- News & FAQ ---------- */
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.news-card { background: #fff; border-radius: 12px; padding: 16px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 8px; }
.news-card__tag { align-self: flex-start; font-size: 11px; font-weight: 700; color: var(--brand); background: var(--brand-soft); padding: 3px 8px; border-radius: 4px; }
.news-card b { font-size: 14px; line-height: 1.45; }
.news-card__meta { font-size: 11.5px; color: var(--ink-soft); margin-top: auto; }
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item { background: #fff; border-radius: 10px; box-shadow: var(--shadow-sm); overflow: hidden; }
.faq-item summary { list-style: none; cursor: pointer; padding: 14px 16px; font-weight: 600; font-size: 14px; display: flex; justify-content: space-between; gap: 12px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; color: var(--brand); font-weight: 700; }
.faq-item[open] summary::after { content: '–'; }
.faq-item p { margin: 0; padding: 0 16px 14px; font-size: 13.5px; color: var(--ink-soft); line-height: 1.7; }

/* ---------- Quick filter chips ---------- */
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.chip {
    border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 7px 14px;
    font-size: 12.5px; cursor: pointer; font-weight: 600; color: var(--ink-soft);
}
.chip:hover { border-color: var(--brand); color: var(--brand); }
.chip.is-active { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ---------- Rating stars ---------- */
.stars { color: var(--amber); font-size: 12.5px; letter-spacing: 1px; }

/* ---------- Floating contact buttons ---------- */
.float-actions { position: fixed; right: 18px; bottom: 18px; z-index: 80; display: flex; flex-direction: column; gap: 9px; }
.float-action {
    width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer;
    display: grid; place-items: center; font-size: 19px; color: #fff; box-shadow: var(--shadow-md);
}
.float-action--zalo { background: #0068ff; }
.float-action--hotline { background: var(--brand); }
.float-action--top { background: #23262b; }
.float-action:hover { filter: brightness(1.08); }

/* ---------- Compare sticky bar ---------- */
.compare-bar {
    position: fixed; left: 50%; transform: translateX(-50%); bottom: 18px; z-index: 70;
    background: #fff; border-radius: 999px; box-shadow: var(--shadow-lg); padding: 8px 10px 8px 18px;
    display: flex; align-items: center; gap: 12px; font-size: 13px;
}
.compare-bar__dots { display: flex; gap: 6px; }
.compare-bar__dots span { width: 30px; height: 30px; border-radius: 6px; background: #eef0f3; display: grid; place-items: center; font-size: 11px; font-weight: 700; color: var(--ink-soft); }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .promo-grid { grid-template-columns: repeat(2, 1fr); }
    .detail { grid-template-columns: 1fr; }
    .detail__gallery { position: static; }
    .service-strip { grid-template-columns: repeat(3, 1fr); }
    .brand-strip { grid-template-columns: repeat(4, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
    .header__inner { flex-wrap: wrap; }
    .header__actions { width: 100%; justify-content: space-between; }
    .search { order: 3; width: 100%; max-width: none; }
    .list-layout, .cart-layout { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .hero__inner { grid-template-columns: 1fr; }
    .admin-stats, .info-grid, .store-grid { grid-template-columns: repeat(2, 1fr); }
    .form__grid-2 { grid-template-columns: 1fr; }
    .banner { min-height: 240px; padding: 28px 22px; }
    .banner__title { font-size: 24px; }
    .carousel__dots { left: 22px; }
    .service-strip { grid-template-columns: repeat(2, 1fr); }
    .brand-strip { grid-template-columns: repeat(3, 1fr); }
    .news-grid { grid-template-columns: 1fr; }
    .flash-sale__track { grid-auto-columns: 78%; }
}
@media (max-width: 520px) {
    .product-grid { grid-template-columns: 1fr; }
    .demo-accounts { grid-template-columns: 1fr; }
    .topbar__left a:not(.topbar__hotline) { display: none; }
    .service-strip, .brand-strip { grid-template-columns: repeat(2, 1fr); }
    .float-actions { right: 12px; bottom: 12px; }
    .float-action { width: 42px; height: 42px; font-size: 17px; }
}

/* ==========================================================================
   UX polish — v2
   ========================================================================== */

/* ---------- Accessibility ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; white-space: nowrap; }
.skip-link {
    position: fixed; top: 8px; left: 8px; z-index: 200; background: var(--brand); color: #fff;
    padding: 9px 14px; border-radius: 6px; font-weight: 600; transform: translateY(-160%); transition: transform .15s;
}
.skip-link:focus { transform: none; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; border-radius: 4px; }
.search__box:focus-within { box-shadow: 0 0 0 3px rgba(232, 56, 13, .18); }
.search__box input:focus-visible { outline: none; }
.field input:focus, .field select:focus, .field textarea:focus,
.price-inputs input:focus { box-shadow: 0 0 0 3px rgba(232, 56, 13, .15); }
::selection { background: var(--brand-soft); color: var(--brand-dark); }
html { scroll-behavior: smooth; }
.app:focus { outline: none; }

/* ---------- Micro-interactions ---------- */
.promo-tile, .brand-tile, .store-card, .news-card, .flash-card { transition: box-shadow .18s, transform .18s; }
.news-card:hover, .store-card:hover, .flash-card:hover, .brand-tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn { transition: background .15s, border-color .15s, color .15s, transform .1s, box-shadow .15s; }
.btn:active:not([disabled]) { transform: scale(.97); }
.btn--primary:hover:not([disabled]) { box-shadow: 0 4px 12px rgba(232, 56, 13, .28); }
.product-card__wish { transition: color .15s, border-color .15s, background .15s, transform .15s; }
.product-card__wish:hover { transform: scale(1.1); }
.product-card__media { overflow: hidden; }
.product-card__media img { transition: transform .3s; }
.product-card:hover .product-card__media img { transform: scale(1.05); }
.category-link { transition: color .15s, border-color .15s; }

/* ---------- Product placeholder (khi chưa có ảnh) ---------- */
.product-card__thumb {
    --hue: 210;
    flex-direction: column; gap: 8px; text-align: center;
    background: linear-gradient(150deg, hsl(var(--hue) 55% 95%), hsl(var(--hue) 45% 86%));
    color: hsl(var(--hue) 35% 42%);
}
.product-card__thumb svg { width: 38%; max-width: 96px; opacity: .85; }
.product-card__thumb span { font-size: 12px; font-weight: 700; letter-spacing: .6px; text-transform: uppercase; opacity: .75; }
.product-card__thumb--lg svg { width: 30%; max-width: 150px; }
.product-card__thumb--lg span { font-size: 15px; }

/* ---------- Skeleton loading ---------- */
.skeleton {
    background: linear-gradient(90deg, #e9ebef 25%, #f4f5f7 37%, #e9ebef 63%);
    background-size: 400% 100%; animation: shimmer 1.4s ease infinite; border-radius: 6px;
}
.skeleton--title { height: 26px; width: 220px; margin: 22px 0 16px; }
.skeleton--media { aspect-ratio: 1/1; border-radius: 10px; }
.skeleton--line { height: 14px; }
.skeleton--short { width: 60%; }
.skeleton--price { height: 20px; width: 45%; }
.skeleton-card { background: #fff; border-radius: 12px; padding: 12px; display: flex; flex-direction: column; gap: 10px; box-shadow: var(--shadow-sm); }
@keyframes shimmer { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

/* ---------- Header / layout refinements ---------- */
.categorybar__inner { scroll-snap-type: x proximity; }
.category-link { scroll-snap-align: start; }
.detail__gallery { top: 150px; }
.toast-stack { right: 76px; align-items: flex-end; }   /* tránh đè các nút nổi bên phải */
.toast { display: flex; align-items: center; gap: 8px; }
.toast--success::before { content: '✓'; font-weight: 800; }
.toast--error::before { content: '!'; font-weight: 800; }
.cart-badge { animation: pop .25s ease-out; }
@keyframes pop { from { transform: scale(.4); } to { transform: scale(1); } }

.detail__actions { flex-direction: column; gap: 10px; }
.detail__cta { display: flex; gap: 10px; }
.detail__cta .btn { flex: 1; }
.detail__aux { display: flex; gap: 10px; flex-wrap: wrap; }
.detail__aux .btn { padding: 8px 14px; font-size: 13px; }

/* Bảng cuộn ngang thay vì tràn màn hình */
.panel, .info-page { min-width: 0; }
.cart-table, .data-table, .spec-table { display: block; overflow-x: auto; max-width: 100%; }

/* ---------- Tablet ---------- */
@media (max-width: 1100px) {
    .header__action--installment { display: none; }
}

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
    .topbar { display: none; }
    .header__inner { gap: 10px; padding: 10px 16px; }
    .header__actions { width: auto; margin-left: auto; gap: 14px; }
    .header__action > span:not(.cart-icon) { display: none; }   /* chỉ hiện icon, gọn hơn */
    .header__action svg { width: 26px; height: 26px; }
    .search { order: 3; flex-basis: 100%; }
    .detail { padding: 16px; gap: 18px; }
    .detail__title { font-size: 20px; }
    .carousel__arrows { display: none; }
    .toast-stack { right: 12px; left: 12px; bottom: 76px; align-items: center; }
    .toast { max-width: 100%; }
    .compare-bar { bottom: 74px; max-width: calc(100% - 24px); }
    .list-toolbar { padding: 10px 12px; }
    .sort-tabs { margin-left: 0; overflow-x: auto; max-width: 100%; scrollbar-width: none; }
    .sort-tabs button { white-space: nowrap; }
    .info-page { padding: 18px; }
    .spec-table td:first-child { width: 120px; }

    /* Thanh mua hàng dính đáy ở trang chi tiết */
    .detail__actions { margin-top: 14px; }
    .detail__cta {
        position: fixed; left: 0; right: 0; bottom: 0; z-index: 85; background: #fff;
        padding: 10px 14px calc(10px + env(safe-area-inset-bottom)); box-shadow: 0 -4px 16px rgba(16, 24, 40, .12);
    }
    .detail__cta .btn { padding: 13px 10px; }
    body:has(.detail__cta) .app { padding-bottom: 76px; }
    body:has(.detail__cta) .float-actions { bottom: 84px; }
    body:has(.detail__cta) .toast-stack { bottom: 140px; }
}

@media (max-width: 520px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }   /* 2 cột như các sàn lớn */
    .product-card__body { padding: 10px; gap: 5px; }
    .product-card__name { font-size: 13px; min-height: 35px; }
    .product-card__price { font-size: 15px; }
    .product-card__actions { flex-direction: column; }
    .product-card__actions .btn { width: 100%; }
    .product-card__rating span:last-child { display: none; }
    .logo__text { font-size: 19px; }
    .section__head h2 { font-size: 18px; }
    .section__head p { display: none; }
    .banner { min-height: 210px; padding: 22px 18px 40px; }
    .banner__title { font-size: 21px; }
    .banner__desc { font-size: 13px; margin-bottom: 14px; }
    .hero__title { font-size: 26px; }
    .promo-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .admin-stats { grid-template-columns: repeat(2, 1fr); }
    .info-grid, .store-grid { grid-template-columns: 1fr; }
    .auth-card { margin: 18px 12px; padding: 20px; }
}

/* ---------- Giảm chuyển động nếu người dùng yêu cầu ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* ---------- Footer (trước đây chưa có style) ---------- */
[hidden] { display: none !important; }
.product-card__note--out { color: #d93a3a; }
.footer { background: #fff; border-top: 1px solid var(--line); margin-top: 40px; }
.footer__grid { display: grid; grid-template-columns: repeat(3, 1fr) 1.4fr; gap: 28px; padding-top: 34px; padding-bottom: 28px; }
.footer__col h4 { margin: 0 0 12px; font-size: 14.5px; font-weight: 800; }
.footer__col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.footer__col li a, .footer__col p { font-size: 13px; color: var(--ink-soft); line-height: 1.6; margin: 0 0 8px; }
.footer__col li a:hover { color: var(--brand); }
.footer__col p strong { color: var(--ink); }
.footer__social { display: flex; gap: 10px; margin-top: 12px; }
.footer__social a {
    width: 34px; height: 34px; border-radius: 50%; background: var(--bg); color: var(--ink-soft);
    display: grid; place-items: center; font-weight: 800; font-size: 14px; transition: background .15s, color .15s;
}
.footer__social a:hover { background: var(--brand); color: #fff; }
.footer__bottom { border-top: 1px solid var(--line); background: #fafbfc; }
.footer__bottom-inner { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 14px; padding-bottom: 14px; font-size: 12.5px; color: var(--ink-soft); }
.cart-badge { top: -7px; right: -9px; box-shadow: 0 0 0 2px #fff; }
.header__action--cart > span:last-child { margin-left: 4px; }
@media (max-width: 860px) { .footer__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .footer__grid { grid-template-columns: 1fr; gap: 20px; } .footer { margin-top: 24px; } }
@media (max-width: 860px) {
    .detail__main-image { aspect-ratio: 4/3; max-height: 300px; }
}

/* Flash sale card: dùng placeholder chung, giá không bị ngắt dòng xấu */
.flash-card__media .product-card__thumb { border-radius: 0; }
.flash-card__price { display: flex; flex-wrap: wrap; align-items: baseline; column-gap: 8px; }
.flash-card__price span { white-space: nowrap; }
.flash-card__price del { margin-left: 0; white-space: nowrap; }
.section { padding-top: 34px; }
@media (max-width: 860px) {
    .flash-sale__track { grid-auto-columns: 46%; }
    .flash-card__media { aspect-ratio: 4/3; }
}
@media (max-width: 520px) {
    .flash-sale__track { grid-auto-columns: 62%; }
}

/* ---------- Đăng nhập / đăng xuất ---------- */
.topbar__btn { border: 0; background: none; padding: 0; font: inherit; color: inherit; cursor: pointer; }
.topbar__btn:hover { color: var(--brand); }
.topbar__user { font-weight: 600; color: var(--ink); max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.header__action--account { display: none; }
.password-wrap { position: relative; display: flex; }
.password-wrap input { padding-right: 62px; }
.password-toggle {
    position: absolute; right: 6px; top: 50%; transform: translateY(-50%); border: 0; background: none;
    color: var(--ink-soft); font-size: 12.5px; font-weight: 600; cursor: pointer; padding: 6px 8px; border-radius: 4px;
}
.password-toggle:hover { color: var(--brand); }
.tabs__logout { margin-left: auto; color: #d93a3a !important; font-weight: 600; }
.tabs__logout:hover { background: #fdecec; }
@media (max-width: 860px) { .header__action--account { display: flex; } .header__action--account > span { display: none; } }