:root {
    --yt-primary: #7a5c43;
    --yt-primary-dark: #634832;
    --yt-accent: #8b6b4f;
    --yt-bg: #faf9f7;
    --yt-card-bg: #ffffff;
    --yt-border: #e8e3dc;
    --yt-text: #2d3748;
    --yt-text-serif: "Georgia", "Cambria", "Times New Roman", serif;
    --yt-sub: #718096;
    --yt-dark: #1a1a1a;
    --yt-paper: #f2eee9;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--yt-bg); color: var(--yt-text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; font-size: 13px; line-height: 1.6; overflow-x: hidden; }
a { color: inherit; text-decoration: none; transition: 0.2s; }

.yt-topbar { background: #000000; border-bottom: 1px solid #222222; font-size: 12px; height: 36px; line-height: 36px; color: #888888; }
.yt-topbar-inner { max-width: 1280px; margin: 0 auto; padding: 0 15px; display: flex; justify-content: flex-end; align-items: center; }
.yt-topbar a { color: #ffffff; }

.yt-header { background: #000000; padding: 20px 0; text-align: center; color: #ffffff; }
.yt-header-inner { max-width: 1280px; margin: 0 auto; padding: 0 15px; display: flex; justify-content: space-between; align-items: center; }
.yt-logo img { height: 38px; width: auto; max-width: 180px; object-fit: contain; filter: brightness(1.2); }

.yt-nav-bar { background: #ffffff; border-bottom: 1px solid var(--yt-border); }
.yt-nav-inner { max-width: 1280px; margin: 0 auto; padding: 0 15px; }
.yt-nav-list { display: flex; list-style: none; flex-wrap: wrap; justify-content: center; }
.yt-nav-list li a { display: block; padding: 12px 22px; color: #2d3748; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; }
.yt-nav-list li a:hover, .yt-nav-list li.active a { color: var(--yt-primary); }

.yt-notice { max-width: 1280px; margin: 15px auto 0; padding: 10px 15px; background: var(--yt-paper); border-left: 4px solid var(--yt-primary); border-radius: 2px; color: var(--yt-primary-dark); font-size: 13px; }

.yt-container { max-width: 1280px; margin: 25px auto; padding: 0 15px; min-height: 60vh; }

.yt-hero-banner { background: linear-gradient(135deg, #222222 0%, #111111 100%); color: #ffffff; padding: 45px 25px; text-align: center; border-radius: 6px; margin-bottom: 30px; }
.yt-hero-banner h1 { font-family: var(--yt-text-serif); font-size: 32px; font-weight: bold; letter-spacing: 2px; color: #ffffff; margin-bottom: 6px; }
.yt-hero-banner p { font-size: 13px; color: #a0aec0; text-transform: uppercase; letter-spacing: 1px; }

.yt-section-head { text-align: center; margin: 40px 0 25px; }
.yt-section-title { font-family: var(--yt-text-serif); font-size: 24px; font-weight: bold; color: #111111; letter-spacing: 1px; text-transform: uppercase; }
.yt-section-sub { font-size: 12px; color: var(--yt-sub); margin-top: 3px; letter-spacing: 1px; }

.yt-grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.yt-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.yt-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.yt-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.yt-card-item { background: #ffffff; border: 1px solid var(--yt-border); border-radius: 4px; padding: 18px 14px; text-align: center; transition: 0.2s; position: relative; }
.yt-card-item:hover { border-color: var(--yt-primary); transform: translateY(-3px); box-shadow: 0 8px 20px rgba(122,92,67,0.12); }
.yt-card-img-box { width: 100%; height: 120px; background: var(--yt-paper); border-radius: 2px; margin-bottom: 12px; display: flex; align-items: center; justify-content: center; }
.yt-card-img-box img { max-width: 75px; max-height: 75px; object-fit: contain; }
.yt-card-name { font-size: 13px; font-weight: 700; color: var(--yt-text); height: 36px; overflow: hidden; margin-bottom: 8px; }
.yt-card-price { font-size: 16px; font-weight: 800; color: var(--yt-primary); margin-bottom: 10px; font-family: var(--yt-text-serif); }
.yt-btn-buy { display: block; width: 100%; padding: 7px 0; background: var(--yt-primary); color: #ffffff; font-size: 12px; font-weight: bold; text-align: center; border-radius: 2px; text-transform: uppercase; }
.yt-btn-buy:hover { background: var(--yt-primary-dark); }

.yt-box { background: #ffffff; border: 1px solid var(--yt-border); margin-bottom: 25px; padding: 20px; border-radius: 4px; }
.yt-row-item { display: flex; align-items: center; justify-content: space-between; padding: 10px 8px; border-bottom: 1px dashed var(--yt-border); font-size: 13px; }
.yt-row-item:last-child { border-bottom: none; }

.yt-detail-layout { display: flex; gap: 35px; background: #ffffff; border: 1px solid var(--yt-border); padding: 35px; border-radius: 4px; }
.yt-detail-media { flex: 0 0 280px; text-align: center; }
.yt-detail-img-wrap { width: 230px; height: 230px; margin: 0 auto 12px; border: 1px solid var(--yt-border); border-radius: 4px; display: flex; align-items: center; justify-content: center; background: var(--yt-paper); padding: 12px; }
.yt-detail-img-wrap img { max-width: 190px; max-height: 190px; object-fit: contain; }
.yt-detail-info { flex: 1; }
.yt-detail-name { font-family: var(--yt-text-serif); font-size: 22px; font-weight: bold; color: var(--yt-text); margin-bottom: 15px; padding-bottom: 10px; border-bottom: 1px solid var(--yt-border); }
.yt-detail-meta-box { background: var(--yt-paper); border: 1px solid var(--yt-border); padding: 15px 20px; border-radius: 4px; margin-bottom: 20px; display: flex; justify-content: space-between; align-items: center; }

.yt-form-group { margin-bottom: 15px; }
.yt-form-label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 13px; color: #475569; }
.yt-input { width: 100%; height: 40px; background: #ffffff; border: 1px solid var(--yt-border); border-radius: 2px; padding: 0 12px; outline: none; font-size: 13px; }
.yt-input:focus { border-color: var(--yt-primary); }
.yt-btn-submit { width: 100%; height: 44px; background: var(--yt-primary); color: #ffffff; font-size: 15px; font-weight: bold; border: none; border-radius: 2px; cursor: pointer; transition: 0.2s; text-transform: uppercase; }
.yt-btn-submit:hover { background: var(--yt-primary-dark); }

.yt-footer { background: var(--yt-dark); color: #94a3b8; padding: 35px 15px; text-align: center; margin-top: 40px; font-size: 13px; }
.yt-footer-links { margin-bottom: 10px; }
.yt-footer-links a { color: #ffffff; margin: 0 10px; font-weight: 500; }
.yt-footer-links a:hover { color: var(--yt-primary); }

@media (max-width: 992px) {
    .yt-grid-5 { grid-template-columns: repeat(3, 1fr); }
    .yt-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .yt-grid-3 { grid-template-columns: 1fr; }
    .yt-grid-2 { grid-template-columns: 1fr; }
    .yt-detail-layout { flex-direction: column; }
    .yt-detail-media { flex: 1; }
}
@media (max-width: 640px) {
    .yt-grid-5, .yt-grid-4 { grid-template-columns: 1fr; }
    .yt-nav-list li a { padding: 9px 12px; font-size: 12px; }
}