/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --color-primary: #1a1a2e;
    --color-primary-hover: #16213e;
    --color-accent: #e94560;
    --color-accent-hover: #c73652;
    --color-bg: #ffffff;
    --color-bg-gray: #f7f7f8;
    --color-text: #1a1a1a;
    --color-text-muted: #6b7280;
    --color-border: #e5e7eb;
    --color-success: #16a34a;
    --color-warning: #d97706;
    --color-danger: #dc2626;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
    --transition: 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ── Layout ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container--sm { max-width: 900px; }
.main-content { min-height: calc(100vh - 140px); padding-bottom: 60px; }

/* ── Typography ── */
h1 { font-size: 2rem; font-weight: 700; }
h2 { font-size: 1.5rem; font-weight: 600; }
h3 { font-size: 1.1rem; font-weight: 600; }

/* ── Buttons ── */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 20px; border-radius: var(--radius);
    font-size: 14px; font-weight: 500; cursor: pointer;
    border: 2px solid transparent; transition: background var(--transition), color var(--transition), border-color var(--transition);
    white-space: nowrap;
}
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--accent { background: var(--color-accent); color: #fff; }
.btn--accent:hover { background: var(--color-accent-hover); }
.btn--outline { background: transparent; border-color: var(--color-border); color: var(--color-text); }
.btn--outline:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--sm { padding: 6px 14px; font-size: 13px; }
.btn--lg { padding: 14px 28px; font-size: 16px; }
.btn--full { width: 100%; }
.btn--flex { flex: 1; }

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}
@media (max-width: 480px) {
    .form-actions { flex-direction: column; }
}

/* ── Inputs ── */
.input {
    width: 100%; padding: 10px 14px; border: 1.5px solid var(--color-border);
    border-radius: var(--radius); font-size: 15px; color: var(--color-text);
    background: var(--color-bg); transition: border-color var(--transition);
}
.input:focus { outline: none; border-color: var(--color-primary); }

/* ── Hero ── */
.hero {
    background: var(--color-primary);
    color: #fff; padding: 100px 24px;
    text-align: center;
}
.hero h1 { font-size: 3rem; margin-bottom: 16px; line-height: 1.2; }
.hero p { font-size: 1.2rem; margin-bottom: 32px; opacity: 0.8; }

/* ── Section ── */
.section { padding: 60px 0; }
.section--gray { background: var(--color-bg-gray); }
.section__header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 32px;
}
.link { color: var(--color-accent); font-weight: 500; }
.link:hover { text-decoration: underline; }

/* ── Product Grid ── */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
}

/* ── Product Card ── */
.product-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition), transform var(--transition);
}
.product-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.product-card__img-wrap { display: block; aspect-ratio: 1; overflow: hidden; background: var(--color-bg-gray); }
.product-card__img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.product-card:hover .product-card__img-wrap img { transform: scale(1.04); }
.product-card__body { padding: 14px; }
.product-card__name {
    display: block; font-size: 14px; font-weight: 500;
    line-height: 1.4; margin-bottom: 6px; color: var(--color-text);
}
.product-card__name:hover { color: var(--color-accent); }
.product-card__rating { display: flex; align-items: center; gap: 6px; margin-bottom: 10px; }
.stars { color: #f59e0b; font-size: 13px; letter-spacing: 1px; }
.stars--lg { font-size: 18px; }
.rating-count { font-size: 12px; color: var(--color-text-muted); }
.product-card__footer { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.product-card__price { font-size: 16px; font-weight: 700; color: var(--color-primary); }

.product-card__form {
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-qty {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg-gray);
    overflow: hidden;
    height: 30px;
}

.card-qty__btn {
    background: none;
    border: none;
    width: 24px;
    height: 100%;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), color var(--transition);
    user-select: none;
    padding: 0;
}

.card-qty__btn:hover {
    background: var(--color-border);
    color: var(--color-primary);
}

.card-qty__input {
    width: 24px;
    height: 100%;
    border: none;
    background: transparent;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    padding: 0;
    -moz-appearance: textfield;
    pointer-events: none;
}

.card-qty__input::-webkit-outer-spin-button,
.card-qty__input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.product-card__btn {
    padding: 6px 12px;
    font-size: 13px;
}

/* ── Categories ── */
.categories { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
.category-card {
    display: flex; flex-direction: column; align-items: center;
    padding: 28px 16px; background: var(--color-bg);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    gap: 10px; font-weight: 500; transition: border-color var(--transition), box-shadow var(--transition);
}
.category-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); }
.category-card__icon { font-size: 2rem; }

/* ── Page Header ── */
.page-header { padding: 40px 0 28px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.page-header h1 { margin: 0; }

/* ── Shop Layout ── */
.shop-layout { display: grid; grid-template-columns: 220px 1fr; gap: 32px; align-items: start; }
.sidebar { background: var(--color-bg-gray); border-radius: var(--radius-lg); padding: 20px; }
.shop-layout > .sidebar {
    position: sticky;
    top: 81px; /* Leave space below the 65px sticky navbar. */
    max-height: calc(100dvh - 97px);
    overflow-y: auto;
}
.sidebar h3 { margin-bottom: 16px; }
.sidebar__search { margin-bottom: 16px; }
.sidebar__categories { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.sidebar__tag {
    padding: 4px 12px; border-radius: 100px; border: 1.5px solid var(--color-border);
    font-size: 13px; transition: all var(--transition); cursor: pointer;
}
.sidebar__tag:hover, .sidebar__tag.active {
    background: var(--color-primary); color: #fff; border-color: var(--color-primary);
}
.results-count { font-size: 14px; color: var(--color-text-muted); margin-bottom: 20px; }

/* ── Breadcrumb ── */
.breadcrumb { display: flex; gap: 8px; font-size: 14px; color: var(--color-text-muted); padding: 20px 0; }
.breadcrumb a:hover { color: var(--color-accent); }

/* ── Product Detail ── */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.product-detail__img { border-radius: var(--radius-lg); overflow: hidden; background: var(--color-bg-gray); }
.product-detail__img img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.product-detail__info { display: flex; flex-direction: column; gap: 16px; }
.product-detail__rating { display: flex; align-items: center; gap: 10px; }
.product-detail__price { font-size: 2rem; font-weight: 700; color: var(--color-primary); }
.product-detail__keywords { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
    padding: 4px 12px; background: var(--color-bg-gray);
    border-radius: 100px; font-size: 13px; color: var(--color-text-muted);
}
.tag:hover { background: var(--color-border); }
.product-detail__form { display: flex; flex-direction: column; gap: 16px; }
.qty-selector label { display: block; margin-bottom: 8px; font-weight: 500; font-size: 14px; }
.qty-selector__controls { display: flex; align-items: center; gap: 0; width: fit-content; }
.qty-selector__controls button {
    width: 36px; height: 36px; background: var(--color-bg-gray);
    border: 1.5px solid var(--color-border); cursor: pointer;
    font-size: 18px; display: flex; align-items: center; justify-content: center;
    transition: background var(--transition);
}
.qty-selector__controls button:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.qty-selector__controls button:last-child { border-radius: 0 var(--radius) var(--radius) 0; }
.qty-selector__controls button:hover { background: var(--color-border); }
.qty-selector__controls input {
    width: 48px; height: 36px; text-align: center;
    border: 1.5px solid var(--color-border); border-left: none; border-right: none;
    font-size: 15px; font-weight: 600; background: var(--color-bg);
}

/* ── Cart ── */
.cart-layout { display: grid; grid-template-columns: 1fr 360px; gap: 32px; align-items: start; }
.cart-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 520px;
    overflow-y: auto;
    padding-right: 6px;
}
.cart-item {
    display: grid; grid-template-columns: 80px 1fr auto auto auto;
    align-items: center; gap: 16px;
    padding: 16px; border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}
.cart-item img { width: 80px; height: 80px; object-fit: cover; border-radius: var(--radius); }
.cart-item__name { font-weight: 500; margin-bottom: 4px; }
.cart-item__name:hover { color: var(--color-accent); }
.cart-item__price { font-size: 14px; color: var(--color-text-muted); }
.cart-item__qty { display: flex; align-items: center; gap: 10px; }
.qty-btn {
    width: 30px; height: 30px; border: 1.5px solid var(--color-border);
    background: var(--color-bg-gray); border-radius: var(--radius);
    cursor: pointer; font-size: 16px; display: flex; align-items: center; justify-content: center;
    transition: background var(--transition);
}
.qty-btn:hover { background: var(--color-border); }
.qty-value { font-weight: 600; min-width: 20px; text-align: center; }
.cart-item__subtotal { font-weight: 700; min-width: 64px; text-align: right; }
.cart-item__remove {
    background: none; border: none; cursor: pointer;
    font-size: 20px; color: var(--color-text-muted); line-height: 1;
    transition: color var(--transition);
}
.cart-item__remove:hover { color: var(--color-danger); }
.cart-summary {
    background: var(--color-bg-gray); border-radius: var(--radius-lg);
    padding: 24px; display: flex; flex-direction: column; gap: 14px;
}
.cart-summary h3 { margin-bottom: 4px; }
.cart-summary__row { display: flex; justify-content: space-between; font-size: 15px; }
.cart-summary__row--total { font-weight: 700; font-size: 18px; padding-top: 14px; border-top: 1px solid var(--color-border); }

/* ── Checkout ── */
.checkout-layout { display: grid; grid-template-columns: 1fr 380px; gap: 40px; align-items: start; }
.checkout-form { display: flex; flex-direction: column; gap: 32px; }
.payment-methods { border: 0; padding: 0; margin: 0; min-width: 0; }
.payment-methods legend { font-weight: 600; margin-bottom: 16px; }
.payment-methods__options { display: grid; gap: 12px; }
.payment-method { display: flex; align-items: center; gap: 14px; padding: 18px; border: 1px solid var(--color-border); border-radius: 12px; cursor: pointer; }
.payment-method:hover { background: #faf9f6; }
.payment-method:has(input:checked) { border-color: var(--color-primary, #292524); background: #f5f3ef; }
.payment-method:has(input:focus-visible) { outline: 2px solid var(--color-primary, #292524); outline-offset: 3px; }
.payment-method input { flex-shrink: 0; accent-color: var(--color-primary, #292524); }
.payment-method__icon { font-size: 24px; width: 32px; text-align: center; flex-shrink: 0; }
.payment-method__copy { display: grid; gap: 5px; min-width: 0; }
.payment-method__copy > span { font-size: 14px; color: var(--color-text-muted, #57534e); }
.payment-method__badge { display: inline-block; margin-left: 6px; padding: 3px 7px; border-radius: 6px; background: #e7e5e4; color: #57534e; font-size: 11px; font-weight: 500; vertical-align: middle; }
.form-section { display: flex; flex-direction: column; gap: 16px; }
.form-section h3 { padding-bottom: 12px; border-bottom: 1px solid var(--color-border); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 14px; font-weight: 500; }
.order-summary { background: var(--color-bg-gray); border-radius: var(--radius-lg); padding: 24px; }
.order-summary h3 { margin-bottom: 16px; }
.order-summary__items {
    max-height: 340px;
    overflow-y: auto;
    padding-right: 6px;
    margin-bottom: 8px;
}
.order-summary__item {
    display: grid; grid-template-columns: 60px 1fr auto;
    align-items: center; gap: 12px; padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}
.order-summary__item img { width: 60px; height: 60px; object-fit: cover; border-radius: var(--radius); }
.order-summary__name { font-size: 14px; font-weight: 500; }
.order-summary__qty { font-size: 13px; color: var(--color-text-muted); }
.order-summary__price { font-weight: 600; }
.order-summary__total {
    display: flex; justify-content: space-between;
    font-weight: 700; font-size: 17px; padding-top: 16px;
}

/* Custom scrollbars for cart and order summary */
.cart-items::-webkit-scrollbar,
.order-summary__items::-webkit-scrollbar {
    width: 6px;
}
.cart-items::-webkit-scrollbar-track,
.order-summary__items::-webkit-scrollbar-track {
    background: transparent;
}
.cart-items::-webkit-scrollbar-thumb,
.order-summary__items::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 10px;
}
.cart-items::-webkit-scrollbar-thumb:hover,
.order-summary__items::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ── Orders ── */
.orders-list { display: flex; flex-direction: column; gap: 16px; }
.order-card { border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 20px; }
.order-card__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.order-card__id { font-weight: 700; margin-right: 12px; }
.order-card__date { font-size: 14px; color: var(--color-text-muted); }
.order-card__items { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.order-card__items img { width: 50px; height: 50px; object-fit: cover; border-radius: var(--radius); }
.order-card__more { font-size: 13px; color: var(--color-text-muted); }
.order-card__footer { display: flex; justify-content: space-between; align-items: center; }
.order-card__total { font-size: 17px; font-weight: 700; }

/* ── Order Detail ── */
.order-detail { display: flex; flex-direction: column; gap: 32px; max-width: 700px; }
.order-detail__section { display: flex; flex-direction: column; gap: 8px; }
.order-detail__section h3 { padding-bottom: 12px; border-bottom: 1px solid var(--color-border); margin-bottom: 4px; }
.order-detail__date { font-size: 14px; color: var(--color-text-muted); }
.order-detail__total {
    display: flex; justify-content: space-between;
    font-size: 1.2rem; font-weight: 700; padding: 20px 0;
    border-top: 2px solid var(--color-border);
}
.order-detail__actions { display: flex; gap: 12px; }

/* ── Badges ── */
.badge { padding: 4px 12px; border-radius: 100px; font-size: 13px; font-weight: 500; }
.badge--success { background: #dcfce7; color: #16a34a; }
.badge--warning { background: #fef9c3; color: #b45309; }

/* ── Flash ── */
.flash-messages { padding: 16px 24px 0; max-width: 1200px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }
.flash {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; border-radius: var(--radius); font-size: 14px;
}
.flash--success { background: #dcfce7; color: #166534; }
.flash--danger  { background: #fee2e2; color: #991b1b; }
.checkout-error { background: #fee2e2; color: #991b1b; padding: 1rem; margin-bottom: 1rem; border: 1px solid #dc2626; border-radius: 8px; }
.flash--warning { background: #fef9c3; color: #92400e; }
.flash__close { background: none; border: none; cursor: pointer; font-size: 18px; opacity: 0.6; }

/* ── Empty State ── */
.empty-state { text-align: center; padding: 80px 24px; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.empty-state p { color: var(--color-text-muted); font-size: 1.1rem; }
.empty-state--lg h1 { font-size: 5rem; color: var(--color-border); }

/* ── Responsive ── */
@media (max-width: 900px) {
    .shop-layout { grid-template-columns: 1fr; }
    .shop-layout > .sidebar { position: static; max-height: none; overflow-y: visible; }
    .product-detail { grid-template-columns: 1fr; }
    .cart-layout { grid-template-columns: 1fr; }
    .checkout-layout { grid-template-columns: 1fr; }
    .hero h1 { font-size: 2.2rem; }
}
@media (max-width: 600px) {
    .cart-item { grid-template-columns: 64px 1fr; grid-template-rows: auto auto; }
    .form-row { grid-template-columns: 1fr; }
}

/* Database checkout and payment feedback. */
#checkoutForm { margin: 28px 0; }
#paymentPanel { margin: 28px 0; }
#paymentQr { width: min(280px, 100%); height: auto; align-self: center; }
#paymentError { color: #b91c1c; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* Author display rules must not override the HTML hidden attribute. */
[hidden] { display: none !important; }
.payment-success { text-align: center; padding: 24px; color: #166534; background: #f0fdf4; border-radius: 16px; }
.payment-success__icon { width: 72px; height: 72px; margin: 0 auto 16px; }
.payment-success__ring { fill: none; stroke: #22c55e; stroke-width: 3; }
.payment-success__tick { fill: none; stroke: #16a34a; stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 50; stroke-dashoffset: 0; }
.payment-success:not([hidden]) { animation: payment-appear .35s ease-out; }
.payment-success:not([hidden]) .payment-success__tick { animation: payment-check .55s ease-out; }
@keyframes payment-appear { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes payment-check { from { stroke-dashoffset: 50; } to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) {
  .payment-success:not([hidden]), .payment-success:not([hidden]) .payment-success__tick { animation: none; }
}

.product-detail__description { margin: 16px 0; }
.product-detail__description h2 { font-size: 16px; margin-bottom: 8px; }
.product-detail__description p { white-space: pre-wrap; overflow-wrap: anywhere; }

.profile-form { margin: 24px 0; }
.profile-preview { width: 96px; height: 96px; object-fit: cover; border-radius: 50%; }
#profileError { color: #b91c1c; }

.profile-page-close { margin-left: auto; font-size: 28px; line-height: 1; padding: 8px; color: inherit; text-decoration: none; }
#profileError:not(:empty) { padding: 12px 16px; background: #fef2f2; border: 1px solid #fecaca; border-radius: 8px; }