:root {
    --bg: #f3f6fb;
    --panel: #fff;
    --line: #e4e9f2;
    --text: #1a2233;
    --muted: #6c768b;
    --primary: #2563eb;
    --danger: #dc2626;
    --ok: #15803d;
    --shadow: 0 10px 30px rgba(16, 24, 40, 0.08);
}
* {
    box-sizing: border-box;
}
body {
    margin: 0;
    font:
        15px/1.45 Inter,
        Segoe UI,
        Roboto,
        Arial,
        sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #f7f9fd, #edf2f8);
}
a {
    color: var(--primary);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.app-shell {
    min-height: 100vh;
}
.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 22px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.brand {
    font-weight: 800;
    color: #0f172a;
    font-size: 20px;
    text-decoration: none;
}
.nav {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.nav a {
    padding: 9px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    color: #0f172a;
    text-decoration: none;
}
.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 20px;
}
.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 18px;
}
.page-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}
.page-head h1 {
    margin: 0;
    font-size: 34px;
    line-height: 1.1;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid var(--line);
    background: #fff;
    color: #111827;
    text-decoration: none;
    cursor: pointer;
    font-weight: 600;
}
.btn:hover {
    text-decoration: none;
    filter: brightness(0.99);
}
.btn.primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.btn.danger {
    color: #fff;
    background: var(--danger);
    border-color: var(--danger);
}
.flash {
    padding: 12px 14px;
    border-radius: 12px;
    margin: 0 0 14px;
    border: 1px solid;
}
.flash.ok {
    background: #effcf3;
    border-color: #b7efc5;
    color: #0f5132;
}
.flash.err {
    background: #fff1f2;
    border-color: #fecdd3;
    color: #991b1b;
}
.empty-state {
    padding: 30px;
    text-align: center;
    color: var(--muted);
}
.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.product-card {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 16px;
    padding: 14px;
    align-items: start;
}
.thumb {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8fafc;
    border-radius: 12px;
    border: 1px solid var(--line);
    overflow: hidden;
    min-height: 140px;
    aspect-ratio: 1/1;
}
.thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}
.thumb.large {
    width: 180px;
    min-height: 180px;
}
.thumb-placeholder {
    color: var(--muted);
    font-size: 13px;
    padding: 10px;
    text-align: center;
}
.card-body {
    min-width: 0;
}
.card-body h3 {
    margin: 0 0 6px;
    font-size: 18px;
    line-height: 1.15;
    font-weight: 600;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.card-body h3 a {
    color: #0f172a;
    text-decoration: none;
}
.card-body h3 a:hover {
    text-decoration: underline;
}
.suburl {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 12px;
    word-break: break-word;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.suburl a {
    color: var(--muted);
}
.price-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 10px;
    margin-bottom: 14px;
    padding: 10px 12px;
    background: #fafbff;
    border: 1px solid var(--line);
    border-radius: 12px;
}
.price-now {
    font-size: 24px;
    line-height: 1;
    font-weight: 700;
    color: #be123c;
    letter-spacing: -0.02em;
}
.meta {
    font-size: 12px;
    color: var(--muted);
    text-align: right;
    max-width: 240px;
}
.actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.actions .btn {
    padding: 8px 12px;
    font-size: 13px;
}
.stack {
    display: grid;
    gap: 12px;
}
.stack label {
    display: grid;
    gap: 6px;
    font-weight: 600;
}
.stack input {
    width: 100%;
    padding: 12px 13px;
    border: 1px solid #cfd8e3;
    border-radius: 10px;
    background: #fff;
    font: inherit;
}
.login-wrap {
    display: grid;
    place-items: center;
    min-height: 70vh;
}
.login-card {
    width: min(460px, 100%);
}
.login-card h1 {
    margin-top: 0;
}
.preview-card {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 14px;
    align-items: center;
    padding: 12px;
    border: 1px dashed #cfd8e3;
    border-radius: 14px;
    background: #fbfdff;
    margin-bottom: 12px;
}
.product-head {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 16px;
}
.product-head h2 {
    margin: 0.2rem 0 0.4rem;
}
.muted {
    color: var(--muted);
}
.form-grid {
    display: grid;
    gap: 12px;
}
.form-grid h3 {
    margin: 10px 0 2px;
    font-size: 16px;
    color: #334155;
    border-top: 1px solid var(--line);
    padding-top: 12px;
}
.form-grid label {
    display: grid;
    gap: 6px;
    font-weight: 600;
}
.form-grid input {
    padding: 11px 12px;
    border: 1px solid #cfd8e3;
    border-radius: 10px;
}
.form-actions {
    padding-top: 8px;
}
@media (max-width: 900px) {
    .product-card {
        grid-template-columns: 120px minmax(0, 1fr);
    }
    .card-body h3 {
        font-size: 20px;
    }
    .price-now {
        font-size: 28px;
    }
}
@media (max-width: 700px) {
    .topbar {
        padding: 12px 14px;
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }
    .page-head h1 {
        font-size: 26px;
    }
    .cards-grid {
        grid-template-columns: 1fr;
    }
    .product-card {
        grid-template-columns: 1fr;
    }
    .thumb {
        min-height: 190px;
        aspect-ratio: auto;
    }
    .product-head {
        flex-direction: column;
    }
    .thumb.large {
        width: 100%;
    }
    .price-row {
        align-items: flex-start;
        flex-direction: column;
    }
    .meta {
        text-align: left;
        max-width: none;
    }
}