:root{--color-primary: #00357a;--color-primary-dark: #002654;--color-primary-light: #e8eef4;--color-bg: #ffffff;--color-surface: #ffffff;--color-text: #00357a;--color-text-muted: #3d5f85;--color-border: #c5d4e8;--shadow-sm: 0 1px 3px rgba(0, 53, 122, .08);--shadow-md: 0 4px 16px rgba(0, 53, 122, .1);--radius: 10px;--font-sans: "Segoe UI", system-ui, -apple-system, sans-serif}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;height:100%}body{margin:0;min-height:100dvh;display:flex;flex-direction:column;font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);line-height:1.6}.site-shell{flex:1;display:flex;flex-direction:column;min-height:100dvh}.page-main{flex:1 0 auto}img{max-width:100%;height:auto;display:block}a{color:var(--color-primary)}.container{width:min(1200px,100% - 2rem);margin-inline:auto}.banner{background:#fff;padding:.5rem 0 0}.banner .banner-inner{display:flex;justify-content:center;align-items:center}.banner-image{display:block;width:100%;height:auto;object-fit:contain;aspect-ratio:2054 / 762}@media(max-width:767px){.banner{padding:.35rem 0 0}.banner .banner-inner{width:calc(100% - 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4rem);width:auto;height:auto;object-fit:contain;border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-md)}.lightbox-caption{margin:0;color:#fff;font-size:1rem;font-weight:600;text-align:center}.lightbox-counter{color:#ffffffe6;font-size:.9rem}.lightbox-close{position:absolute;top:1rem;right:1rem;z-index:2;width:44px;height:44px;border:none;border-radius:50%;background:#fff;color:var(--color-primary);font-size:1.75rem;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center}.lightbox-close:hover{background:var(--color-primary-light)}.lightbox-prev,.lightbox-next{position:absolute;top:50%;transform:translateY(-50%);z-index:2;width:48px;height:48px;border:none;border-radius:50%;background:#fff;color:var(--color-primary);font-size:2rem;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm)}.lightbox-prev{left:1rem}.lightbox-next{right:1rem}.lightbox-prev:hover,.lightbox-next:hover{background:var(--color-primary-light)}.lightbox-prev[hidden],.lightbox-next[hidden],.lightbox-counter[hidden]{display:none!important}@media(max-width:640px){.lightbox-prev{left:.5rem}.lightbox-next{right:.5rem}.lightbox-prev,.lightbox-next{width:40px;height:40px;font-size:1.5rem}}.empty-state{text-align:center;padding:3rem 1rem;color:var(--color-text-muted);background:var(--color-surface);border-radius:var(--radius);border:1px dashed var(--color-border)}@media(max-width:768px){.product-table-wrap{display:none}.product-cards{display:flex}}.site-footer{flex-shrink:0;margin-top:auto;background:var(--color-primary);color:#fff;padding:1rem 0;font-size:.9rem}.site-footer-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem 1.5rem}.site-footer-copy{margin:0;opacity:.92;text-align:left;line-height:1.45;flex:1 1 12rem}.footer-contact{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:.5rem;margin-left:auto}.footer-contact-link{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:.2rem;min-width:3.25rem;padding:.35rem .5rem;border-radius:8px;color:#fff;text-decoration:none;transition:background .15s}.footer-contact-link:hover{background:#ffffff26}.footer-contact-link--disabled{opacity:.45;cursor:not-allowed;pointer-events:none}.footer-icon{width:1.35rem;height:1.35rem}.footer-icon--zalo{width:1.35rem;height:1.35rem;object-fit:contain}.footer-contact-link--disabled .footer-icon--zalo{filter:grayscale(1) brightness(1.4);opacity:.7}.footer-contact-label{font-size:.65rem;font-weight:600;letter-spacing:.02em;text-transform:uppercase;opacity:.9}@media(max-width:640px){.site-footer-inner{flex-direction:column;align-items:stretch;text-align:center}.site-footer-copy{text-align:center;flex:none}.footer-contact{justify-content:center;margin-left:0;width:100%;gap:.35rem}.footer-contact-link{flex:1 1 calc(25% - .35rem);min-width:0;max-width:5rem;padding:.5rem .25rem}.footer-icon{width:1.5rem;height:1.5rem}}.admin-header{background:var(--color-primary);color:#fff;padding:1rem 0}.admin-header .container{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}.admin-header h1{margin:0;font-size:1.25rem}.admin-header a{color:#fff;text-decoration:none;opacity:.9}.admin-header a:hover{opacity:1;text-decoration:underline}.admin-main{padding:2rem 0 4rem}.admin-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;gap:1rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.35rem;padding:.55rem 1.1rem;border:none;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;font-family:inherit;transition:background .15s,transform .1s}.btn:active{transform:scale(.98)}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-dark)}.btn-secondary{background:var(--color-primary-light);color:var(--color-primary-dark)}.btn-secondary:hover{background:#d4dde8}.btn-danger{background:#fee2e2;color:#b91c1c}.btn-danger:hover{background:#fecaca}.btn-sm{padding:.35rem .75rem;font-size:.85rem}.admin-actions{display:flex;gap:.5rem;flex-wrap:wrap}.modal-overlay{position:fixed;inset:0;background:#1a2b3380;display:none;align-items:center;justify-content:center;z-index:100;padding:1rem}.modal-overlay.open{display:flex}.modal{background:var(--color-surface);border-radius:var(--radius);width:min(560px,100%);max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-md)}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.25rem;border-bottom:1px solid var(--color-border)}.modal-header h2{margin:0;font-size:1.15rem;color:var(--color-primary-dark)}.modal-close{background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--color-text-muted);line-height:1}.product-form{padding:1.25rem;display:flex;flex-direction:column;gap:1rem}.form-group label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.35rem;color:var(--color-text)}.form-group input,.form-group textarea{width:100%;padding:.55rem .75rem;border:1px solid var(--color-border);border-radius:8px;font-family:inherit;font-size:.95rem}.form-group input:focus,.form-group textarea:focus{outline:2px solid var(--color-primary);outline-offset:1px;border-color:var(--color-primary)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}@media(max-width:480px){.form-row{grid-template-columns:1fr}}.upload-zone{border:2px dashed var(--color-border);border-radius:var(--radius);padding:1.5rem;text-align:center;cursor:pointer;background:var(--color-primary-light);transition:border-color .15s}.upload-zone:hover,.upload-zone.dragover{border-color:var(--color-primary)}.upload-zone input{display:none}.image-preview-list{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.5rem}.preview-item{position:relative;width:72px;height:72px}.preview-item img{width:100%;height:100%;object-fit:cover;border-radius:6px;border:1px solid var(--color-border)}.preview-item button{position:absolute;top:-6px;right:-6px;width:22px;height:22px;border-radius:50%;border:none;background:#b91c1c;color:#fff;font-size:14px;cursor:pointer;line-height:1}.form-actions{display:flex;gap:.75rem;justify-content:flex-end;padding-top:.5rem}.toast{position:fixed;bottom:1.5rem;right:1.5rem;padding:.75rem 1.25rem;border-radius:8px;background:var(--color-primary-dark);color:#fff;font-size:.9rem;z-index:200;opacity:0;transform:translateY(10px);transition:opacity .2s,transform .2s;pointer-events:none}.toast.show{opacity:1;transform:translateY(0)}.toast.error{background:#b91c1c}