:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-muted: #64748b;
    --color-text: #0f172a;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-accent: #22c55e;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --transition: 0.18s ease;
}

.theme-dark {
    --color-bg: #0f172a;
    --color-surface: #111c32;
    --color-border: #1e293b;
    --color-muted: #94a3b8;
    --color-text: #e2e8f0;
    --color-primary: #60a5fa;
    --color-primary-dark: #3b82f6;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.45);
    --shadow-md: 0 10px 40px rgba(15, 23, 42, 0.45);
}

* {
    box-sizing: border-box;
}

html,
body {
    padding: 0;
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    color: var(--color-primary);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: min(1120px, 94vw);
    margin: 0 auto;
}

.site-header {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.08), rgba(37, 99, 235, 0));
    border-bottom: 1px solid var(--color-border);
}

.topbar {
    padding: 12px 0;
}

.topbar .container {
    display: flex;
    align-items: center;
    gap: 18px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand__link {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
}

.theme-toggle {
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover {
    border-color: var(--color-primary);
}

.search {
    flex: 1;
    position: relative;
    display: flex;
    gap: 10px;
}

.search input[type="search"] {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: inherit;
}

.search button {
    padding: 0 20px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search button:hover {
    background: var(--color-primary-dark);
}

.search-suggest {
    position: absolute;
    inset: 100% 0 auto 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    margin-top: 8px;
    list-style: none;
    padding: 6px;
    box-shadow: var(--shadow-md);
    z-index: 20;
}

.search-suggest li a {
    display: block;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
}

.search-suggest li a:hover {
    background: rgba(37, 99, 235, 0.08);
}

.topbar__nav {
    display: flex;
    align-items: center;
    gap: 14px;
}

.nav-link {
    font-weight: 600;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    background: rgba(37, 99, 235, 0.08);
}

.nav-link--cta {
    background: var(--color-primary);
    color: #fff;
}

.inline-form {
    display: inline;
}

main {
    min-height: 68vh;
    padding: 36px 0 64px;
}

.hero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    align-items: center;
    background: radial-gradient(100% 100% at 0% 0%, rgba(37, 99, 235, 0.12) 0%, rgba(37, 99, 235, 0) 60%);
    padding: 48px;
    border-radius: var(--radius-lg);
}

.hero__content h1 {
    font-size: clamp(32px, 5vw, 44px);
    margin: 0 0 12px;
}

.hero__content p {
    font-size: 18px;
    color: var(--color-muted);
    margin-bottom: 28px;
}

.hero__search {
    display: flex;
    gap: 12px;
    background: var(--color-surface);
    padding: 10px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.hero__search input {
    border: none;
    flex: 1;
    padding: 12px 14px;
}

.hero__search button {
    border: none;
    background: var(--color-primary);
    color: #fff;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
}

.hero__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-top: 24px;
    color: var(--color-muted);
}

.hero__tags a {
    background: var(--color-surface);
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    font-size: 14px;
}

.section {
    margin-top: 56px;
}

.section--alt {
    background: rgba(37, 99, 235, 0.04);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.section__header {
    margin-bottom: 24px;
}

.section__header--row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.section__header h1,
.section__header h2 {
    margin: 0;
}

.section__header p {
    color: var(--color-muted);
}

.product-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.product-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
    display: grid;
    grid-template-rows: 180px auto;
    transition: transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.product-card__image {
    background: rgba(15, 23, 42, 0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.product-card__body {
    padding: 18px 20px;
    display: grid;
    gap: 10px;
}

.product-card__brand {
    color: var(--color-muted);
    font-size: 14px;
}

.product-card__price {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    color: var(--color-primary);
}

.product-card__price--muted {
    color: var(--color-muted);
}

.category-grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.category-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 18px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

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

.category-card__icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: rgba(37, 99, 235, 0.08);
    display: grid;
    place-items: center;
}

.steps {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.step {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    padding: 24px;
    position: relative;
}

.step__number {
    position: absolute;
    top: -16px;
    left: 20px;
    background: var(--color-primary);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-weight: 700;
}

.filters {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    position: sticky;
    top: 24px;
    height: max-content;
}

.search-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
}

.filters fieldset {
    border: none;
    margin: 0 0 18px 0;
    padding: 0;
}

.filters legend {
    font-weight: 600;
    margin-bottom: 10px;
}

.filters input[type="number"],
.filters input[type="checkbox"] {
    margin-bottom: 8px;
}

.results {
    display: grid;
    gap: 18px;
}

.search-card {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 22px;
    padding: 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.search-card__image {
    background: rgba(15, 23, 42, 0.04);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.search-card__meta {
    display: flex;
    gap: 10px;
    margin: 12px 0;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.12);
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 600;
}

.badge--muted {
    background: rgba(100, 116, 139, 0.16);
    color: var(--color-muted);
}

.search-card__actions {
    display: flex;
    gap: 12px;
}

.btn {
    border: none;
    background: var(--color-primary);
    color: #fff;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover {
    background: var(--color-primary-dark);
}

.btn--ghost {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid rgba(37, 99, 235, 0.4);
}

.empty {
    text-align: center;
    padding: 48px 24px;
    border-radius: var(--radius-md);
    border: 1px dashed var(--color-border);
}

.section--center {
    text-align: center;
    padding: 60px 0;
}

.section--center h1 {
    margin-bottom: 12px;
}

.product-detail {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--color-border);
}

.product-detail__gallery {
    display: grid;
    place-items: center;
    background: rgba(15, 23, 42, 0.04);
    border-radius: var(--radius-md);
    padding: 20px;
}

.product-detail__meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 18px 0;
}

.product-detail__actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.offer-table table,
.table {
    width: 100%;
    border-collapse: collapse;
}

.offer-table th,
.offer-table td,
.table th,
.table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--color-border);
}

.chart-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
}

.alert-form {
    display: flex;
    gap: 16px;
    align-items: flex-end;
}

.alert-form label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.reviews {
    display: grid;
    gap: 16px;
}

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

.review__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.compare-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.compare-table th,
.compare-table td {
    padding: 12px;
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}

.compare-thumb {
    width: 120px;
    border-radius: var(--radius-sm);
    margin: 0 auto;
}

.compare-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 18px;
}

.auth {
    display: grid;
    place-items: center;
}

.auth__panel {
    background: var(--color-surface);
    padding: 40px;
    border-radius: var(--radius-lg);
    width: min(420px, 94vw);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.auth__panel h1 {
    margin-top: 0;
}

.form {
    display: grid;
    gap: 16px;
    margin-top: 24px;
}

.form label {
    display: grid;
    gap: 8px;
    font-weight: 600;
    color: var(--color-muted);
}

.form input,
.form select {
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: inherit;
}

.btn--full {
    width: 100%;
}

.auth__links {
    margin-top: 24px;
    display: grid;
    gap: 8px;
    text-align: center;
}

.dashboard-grid {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
}

.list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 12px;
}

.list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dashed var(--color-border);
    padding-bottom: 10px;
}

.table-responsive {
    overflow-x: auto;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 18px;
    margin: 28px 0;
}

.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.stat-card__label {
    display: block;
    font-size: 14px;
    color: var(--color-muted);
    margin-bottom: 8px;
}

.logs-grid {
    display: grid;
    gap: 20px;
}

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

.log-card__header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
}

.log-card pre {
    margin: 0;
    padding: 20px;
    max-height: 320px;
    overflow: auto;
    font-size: 13px;
    background: rgba(15, 23, 42, 0.04);
}

.alert {
    padding: 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 18px;
    font-weight: 600;
}

.alert--success {
    background: rgba(34, 197, 94, 0.12);
    color: #166534;
}

.alert--error {
    background: rgba(239, 68, 68, 0.12);
    color: #b91c1c;
}

.site-footer {
    margin-top: 80px;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 48px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.footer-grid h5,
.footer-grid h4 {
    margin-top: 0;
}

.footer-grid ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
}

.footer-grid input {
    width: 100%;
    padding: 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.footer-grid button {
    margin-top: 10px;
    width: 100%;
    padding: 10px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
    color: var(--color-muted);
    flex-wrap: wrap;
    gap: 12px;
}

.social {
    display: flex;
    gap: 16px;
}

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

@media (max-width: 960px) {
    .search-layout {
        grid-template-columns: 1fr;
    }

    .filters {
        position: static;
    }

    .search-card {
        grid-template-columns: 1fr;
    }

    .section__header--row {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .product-detail {
        padding: 24px;
    }
}

@media (max-width: 720px) {
    .topbar .container {
        flex-wrap: wrap;
    }

    .hero {
        padding: 32px;
    }

    .hero__search {
        flex-direction: column;
    }

    .hero__search button,
    .search button {
        width: 100%;
    }

    .product-detail__actions,
    .search-card__actions {
        flex-direction: column;
    }
}