/* =====================================================
   PRODUCTS PAGE — Cinematic premium redesign
   ===================================================== */
:root{
    --c-red:#d32f2f;
    --c-red-dark:#9a1c1c;
    --c-gold:#c9a14a;
    --c-gold-light:#f0d77a;
    --c-dark:#0e0e10;
    --c-dark-2:#1a1a1c;
    --c-text:#1a1a1a;
    --c-text-muted:#666;
    --c-bg:#f7f6f3;
}

body{
    font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
    margin:0;
    padding:0;
    background:var(--c-bg);
    color:var(--c-text);
    overflow-x:hidden;
    transition:margin-left .3s ease;
}
main{overflow-x:hidden}

/* ============================================
   PAGE HERO — h2 page title
   ============================================ */
h2{
    position:relative;
    margin:0;
    padding:90px 24px 70px;
    text-align:center;
    font-size:2.8em;
    font-weight:600;
    line-height:1.25;
    letter-spacing:.5px;
    color:#fff;
    word-wrap:break-word;
    background:
        radial-gradient(circle at 18% 22%, rgba(211,47,47,.28), transparent 50%),
        radial-gradient(circle at 82% 78%, rgba(201,161,74,.2), transparent 55%),
        linear-gradient(135deg,#0e0e10 0%,#1a1a1c 45%,#2a1a1a 100%);
    box-shadow:inset 0 -4px 0 var(--c-gold);
    text-shadow:0 4px 24px rgba(0,0,0,.55);
    overflow:hidden;
}
h2::before{
    content:"Bộ sưu tập cao cấp";
    display:block;
    font-size:14px;
    font-weight:500;
    letter-spacing:0;
    color:var(--c-gold);
    margin-bottom:18px;
    text-shadow:none;
}
h2::after{
    content:"";
    display:block;
    width:90px;
    height:4px;
    margin:24px auto 0;
    background:linear-gradient(90deg,var(--c-red),var(--c-gold));
    border-radius:4px;
    text-shadow:none;
}

/* ============================================
   SECTION — Sub-category (.sub-category + h4)
   ============================================ */
.sub-category{
    position:relative;
    padding:64px 24px 32px;
}
.sub-category:not(:first-of-type){
    border-top:1px dashed rgba(0,0,0,.08);
}
h4{
    position:relative;
    text-align:center;
    font-size:2em;
    font-weight:600;
    margin:0 auto 8px;
    padding:6px 0 0;
    line-height:1.4;
    letter-spacing:.3px;
    color:transparent;
    background:linear-gradient(135deg,var(--c-red),var(--c-gold));
    -webkit-background-clip:text;
    background-clip:text;
    -webkit-text-fill-color:transparent;
}

/* ============================================
   COLOR-SELECT BUTTON (Chọn màu)
   ============================================ */
.title-product,
.title-otherproduct{
    text-align:center;
    margin:24px auto 30px;
    padding:0 16px;
}
.color-select-button{
    position:relative;
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:14px 32px;
    font-size:15px;
    font-weight:500;
    letter-spacing:0;
    color:#fff;
    background:linear-gradient(135deg,var(--c-red) 0%,#b71c1c 100%);
    border:none;
    border-radius:50px;
    cursor:pointer;
    box-shadow:0 10px 26px rgba(211,47,47,.38),inset 0 1px 0 rgba(255,255,255,.2);
    transition:transform .3s,box-shadow .3s;
}
.color-select-button::before{
    content:"\1F3A8";
    font-size:16px;
}
.color-select-button:hover{
    transform:translateY(-3px);
    box-shadow:0 14px 34px rgba(211,47,47,.55);
}
.color-select-button:active{transform:translateY(-1px)}

/* ============================================
   NAVIGATE PILLS (jump-to-section)
   ============================================ */
.navigate-buttons{
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:12px;
    margin:0 auto 36px;
    padding:0 20px;
    max-width:1200px;
}
.button-custom{
    position:relative;
    background:#fff;
    color:var(--c-red);
    border:2px solid var(--c-red);
    padding:10px 22px;
    font-size:14px;
    font-weight:500;
    letter-spacing:0;
    border-radius:50px;
    cursor:pointer;
    transition:all .3s ease;
    margin:0;
    box-shadow:0 4px 14px rgba(0,0,0,.05);
}
.button-custom:hover{
    background:linear-gradient(135deg,var(--c-red),#b71c1c);
    color:#fff;
    border-color:var(--c-red);
    box-shadow:0 8px 22px rgba(211,47,47,.45);
    transform:translateY(-2px);
}
.button-custom:active{transform:translateY(0)}

/* ============================================
   PRODUCTS GRID
   ============================================ */
.products-list{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:28px;
    padding:30px 40px 60px;
    max-width:1400px;
    margin:0 auto;
    background:transparent;
}

/* ============================================
   PRODUCT CARD
   ============================================ */
.product-item{
    position:relative;
    background:#fff;
    border-radius:18px;
    overflow:hidden;
    box-shadow:0 10px 30px rgba(0,0,0,.06),0 2px 6px rgba(0,0,0,.04);
    border:1px solid rgba(0,0,0,.04);
    transition:all .4s cubic-bezier(.25,.8,.25,1);
    display:flex;
    flex-direction:column;
    padding:0;
    max-width:none;
    margin:0;
    text-align:left;
}
.product-item::before{
    content:"";
    position:absolute;
    top:0;left:0;right:0;height:4px;
    background:linear-gradient(90deg,var(--c-red),var(--c-gold),var(--c-red));
    transform:scaleX(0);
    transform-origin:left;
    transition:transform .45s ease;
    z-index:3;
}
.product-item:hover{
    transform:translateY(-10px);
    box-shadow:0 26px 52px rgba(211,47,47,.16),0 10px 22px rgba(0,0,0,.08);
    border-color:rgba(211,47,47,.18);
}
.product-item:hover::before{transform:scaleX(1)}

.product-item img{
    width:100%;
    height:280px;
    object-fit:contain;
    background:linear-gradient(135deg,#f8f8f8 0%,#ececec 100%);
    padding:24px;
    display:block;
    margin:0;
    transition:transform .6s ease;
    max-height:none;
}
.product-item:hover img{transform:scale(1.06)}

/* Detail panel */
.product-details{
    background:#fff;
    padding:24px 22px 12px;
    border-radius:0;
    box-shadow:none;
    color:var(--c-text);
    line-height:1.65;
    flex:1;
}
.product-details p{
    white-space:pre-line;
    line-height:1.65;
    margin:6px 0;
    font-size:14px;
    color:#5a5a5a;
}
.product-details p:first-child{
    font-weight:600;
    font-size:18.5px;
    color:var(--c-text);
    margin:0 0 10px;
    letter-spacing:.2px;
    line-height:1.3;
    position:relative;
    padding-bottom:14px;
}
.product-details p:first-child::after{
    content:"";
    display:block;
    width:40px;
    height:3px;
    background:linear-gradient(90deg,var(--c-red),var(--c-gold));
    border-radius:2px;
    position:absolute;
    bottom:0;left:0;
}
.product-details p:nth-child(2){
    font-style:normal;
    color:#666;
    font-size:13.5px;
}

/* Button area */
.product-buttons{
    display:flex;
    flex-direction:column;
    gap:10px;
    padding:0 22px 22px;
    margin-top:8px;
}
.product-button{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    padding:13px 24px;
    background:linear-gradient(135deg,var(--c-dark) 0%,var(--c-dark-2) 100%);
    color:#fff;
    border:none;
    border-radius:12px;
    font-size:14px;
    font-weight:500;
    letter-spacing:0;
    cursor:pointer;
    transition:all .3s;
    box-shadow:0 6px 16px rgba(0,0,0,.18);
}
.product-button::before{
    content:"\260E";
    font-size:15px;
}
.product-button:hover{
    background:linear-gradient(135deg,var(--c-red) 0%,var(--c-red-dark) 100%);
    transform:translateY(-2px);
    box-shadow:0 10px 24px rgba(211,47,47,.42);
}
.phone-number{
    margin:6px 0 0;
    padding:14px 16px;
    background:linear-gradient(135deg,rgba(211,47,47,.06),rgba(201,161,74,.08));
    border-left:3px solid var(--c-red);
    border-radius:10px;
    font-size:13px;
    color:var(--c-text);
    line-height:1.65;
    white-space:pre-line;
    word-break:break-word;
}

/* ============================================
   LOAD MORE
   ============================================ */
.load-more-container{
    text-align:center;
    margin:30px 0 56px;
    padding:0 20px;
}
.load-more-button{
    position:relative;
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:14px 38px;
    background:linear-gradient(135deg,#fff,#f5f5f5);
    color:var(--c-text);
    border:2px solid var(--c-text);
    border-radius:50px;
    font-weight:500;
    font-size:14px;
    letter-spacing:0;
    cursor:pointer;
    transition:all .3s;
    box-shadow:0 8px 20px rgba(0,0,0,.08);
}
.load-more-button::after{
    content:"\2193";
    font-size:18px;
    transition:transform .3s;
}
.load-more-button:hover{
    background:linear-gradient(135deg,var(--c-red),var(--c-red-dark));
    color:#fff;
    border-color:var(--c-red);
    box-shadow:0 14px 32px rgba(211,47,47,.42);
    transform:translateY(-2px);
}
.load-more-button:hover::after{transform:translateY(4px)}

/* ============================================
   COLOR PICKER MODAL
   ============================================ */
.overlay{
    position:fixed;
    top:0;left:0;
    width:100%;height:100%;
    background:rgba(0,0,0,.7);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
    z-index:999;
    animation:fp-fadeIn .3s ease;
}
@keyframes fp-fadeIn{from{opacity:0}to{opacity:1}}
.color-picker-container{
    position:fixed;
    top:50%;left:50%;
    transform:translate(-50%,-50%);
    z-index:1001;
    padding:28px;
    background:#fff;
    border-radius:20px;
    box-shadow:0 30px 80px rgba(0,0,0,.4);
    max-width:720px;
    width:92%;
    max-height:88vh;
    display:flex;
    flex-direction:column;
    animation:fp-modalIn .35s cubic-bezier(.34,1.56,.64,1);
}
@keyframes fp-modalIn{
    from{opacity:0;transform:translate(-50%,-46%) scale(.92)}
    to{opacity:1;transform:translate(-50%,-50%) scale(1)}
}
.color-picker-header{
    margin-bottom:18px;
    padding-bottom:18px;
    border-bottom:1px solid #eee;
}
.color-picker-header h4{
    margin:0 0 12px;
    font-size:22px;
    font-weight:600;
    text-align:left;
    padding:0;
}
.color-picker-body{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:12px;
    max-height:54vh;
    overflow-y:auto;
    padding:4px;
}
.color-picker-body::-webkit-scrollbar{width:8px}
.color-picker-body::-webkit-scrollbar-track{background:#f0f0f0;border-radius:8px}
.color-picker-body::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--c-red),var(--c-gold));border-radius:8px}

.color-box{
    position:relative;
    width:100%;
    padding:8px;
    text-align:center;
    border-radius:12px;
    background:#fafafa;
    transition:all .25s;
    cursor:pointer;
}
.color-box:hover{
    background:#fff;
    transform:translateY(-3px);
    box-shadow:0 8px 22px rgba(0,0,0,.1);
}
.color-box img{
    width:100%;
    height:auto;
    border-radius:8px;
    box-shadow:0 2px 8px rgba(0,0,0,.15);
}
.color-box p{
    margin-top:8px;
    font-size:11px;
    color:var(--c-text-muted);
    font-weight:500;
    line-height:1.3;
}
.color-checkbox{
    position:absolute;
    top:8px;right:8px;
    width:20px;height:20px;
    cursor:pointer;
    accent-color:var(--c-red);
    transform:none;
}
.color-picker-footer{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-top:20px;
    padding-top:18px;
    border-top:1px solid #eee;
    flex-wrap:wrap;
    gap:10px;
}
.page-button{
    padding:9px 18px;
    background:linear-gradient(135deg,#6c757d,#5a6268);
    color:#fff;
    border:none;
    border-radius:30px;
    cursor:pointer;
    font-weight:700;
    font-size:13px;
    transition:all .3s;
    margin:0 4px;
    box-shadow:0 4px 12px rgba(0,0,0,.1);
}
.page-button:hover{
    background:linear-gradient(135deg,#5a6268,#494e53);
    transform:translateY(-2px);
}
.page-button:disabled{
    background:#ccc;
    cursor:not-allowed;
    transform:none;
    box-shadow:none;
}
.close-picker-button{
    background:linear-gradient(135deg,var(--c-red),var(--c-red-dark));
    color:#fff;
    border:none;
    border-radius:30px;
    padding:9px 22px;
    font-size:13px;
    font-weight:700;
    cursor:pointer;
    transition:all .3s;
    margin:0 4px;
    box-shadow:0 4px 14px rgba(211,47,47,.32);
    float:none;
}
.close-picker-button:hover{
    transform:translateY(-2px);
    box-shadow:0 10px 24px rgba(211,47,47,.5);
}
.selected-colors{
    display:flex;
    flex-wrap:wrap;
    gap:6px;
}
.color-tag{
    background:linear-gradient(135deg,var(--c-red),var(--c-red-dark));
    color:#fff;
    padding:5px 12px;
    border-radius:20px;
    font-size:12px;
    font-weight:600;
    display:inline-flex;
    align-items:center;
    gap:4px;
}
.remove-color-button{
    background:none;
    border:none;
    color:rgba(255,255,255,.85);
    font-weight:600;
    font-size:14px;
    cursor:pointer;
    padding:0 2px;
    margin-left:4px;
}
.remove-color-button:hover{color:#fff}

.hidden{display:none}

/* ============================================
   FOOTER (unchanged structure)
   ============================================ */
footer{background:#545658;color:#f8f9fa;padding:2em;border-top:1px solid #495057}
.footer-content{max-width:1200px;margin:0 auto;text-align:center}
.footer-title{font-size:1.5em;margin-bottom:1em}
.footer-sections{display:flex;justify-content:space-between;align-items:flex-start}
.company-info{flex:1;text-align:left;margin-right:1em}
.company-info p{margin:.5em 0}
.company-info a{color:#17a2b8;text-decoration:none}
.company-info a:hover{text-decoration:underline}
.map-container{flex:1;text-align:right}
.map-container iframe{max-width:100%;height:200px;border:none}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width:1200px){
    .products-list{grid-template-columns:repeat(3,1fr);gap:22px;padding:24px 24px 50px}
    h2{font-size:2.3em;padding:78px 22px 56px}
    .product-item img{height:240px}
}
@media (max-width:900px){
    main{padding-top:96px !important}
    h2{font-size:1.85em;padding:54px 18px 44px}
    h2::before{font-size:11px;letter-spacing:3.5px;margin-bottom:12px}
    h2::after{width:70px;height:3px;margin-top:18px}
    .sub-category{padding:44px 18px 22px}
    h4{font-size:1.55em}
    .color-select-button{padding:12px 26px;font-size:13.5px}
    .navigate-buttons{gap:8px;padding:0 14px;margin-bottom:28px}
    .button-custom{padding:9px 18px;font-size:12.5px}
    .products-list{grid-template-columns:repeat(2,1fr);gap:18px;padding:20px 18px 40px}
    .product-item img{height:220px;padding:18px}
    .product-details{padding:20px 18px 8px}
    .product-details p:first-child{font-size:17px}
    .product-buttons{padding:0 18px 18px}
}
@media (max-width:600px){
    main{padding-top:88px !important}
    h2{font-size:1.45em;padding:40px 14px 34px;line-height:1.35}
    h2::before{font-size:10px;letter-spacing:2.8px;margin-bottom:8px}
    h2::after{width:54px;height:3px;margin-top:14px}
    .sub-category{padding:32px 14px 16px}
    h4{font-size:1.22em;padding:4px 0 0}
    .title-product,.title-otherproduct{margin:18px auto 22px}
    .color-select-button{padding:11px 22px;font-size:12.5px;letter-spacing:.6px}
    .color-select-button::before{font-size:14px}
    .navigate-buttons{gap:6px;margin-bottom:22px}
    .button-custom{padding:7px 13px;font-size:11.5px;border-width:1.5px;letter-spacing:.3px}
    .products-list{grid-template-columns:1fr;gap:18px;padding:18px 14px 30px}
    .product-item img{height:240px;padding:16px}
    .product-details{padding:18px 18px 6px}
    .product-details p:first-child{font-size:16.5px;padding-bottom:12px}
    .product-details p{font-size:13.5px}
    .product-buttons{padding:0 18px 18px}
    .product-button{padding:11px 18px;font-size:12.5px}
    .phone-number{font-size:12.5px;padding:12px 14px}
    .load-more-button{padding:12px 28px;font-size:12.5px;letter-spacing:.6px}
    .color-picker-container{padding:18px;max-width:94vw;border-radius:16px}
    .color-picker-header{margin-bottom:14px;padding-bottom:14px}
    .color-picker-header h4{font-size:17px}
    .color-picker-body{grid-template-columns:repeat(3,1fr);gap:8px;max-height:55vh}
    .color-box{padding:6px}
    .color-box p{font-size:10px}
    .color-picker-footer{gap:6px;justify-content:center;margin-top:14px;padding-top:14px}
    .page-button,.close-picker-button{padding:7px 14px;font-size:12px;margin:0}
}
@media (max-width:380px){
    h2{font-size:1.3em}
    .button-custom{font-size:11px;padding:6px 11px}
    .color-picker-body{grid-template-columns:repeat(2,1fr)}
}