* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        /* Cover container – ready to embed at the top of any independent site */
        .article-cover {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            max-width: 1280px;
            margin: 0 auto 2rem auto;
            border-radius: 32px;
            overflow: hidden;
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.15);
            transition: all 0.2s ease;
        }

        /* Main visual background: scientific lab + warm premium gradient */
        .cover-backdrop {
            background: linear-gradient(135deg, #0B1A2A 0%, #1E2A3A 40%, #6B3E2C 100%);
            position: relative;
            padding: 3rem 2.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            border-bottom: 4px solid #E38B6F;
        }

        /* Abstract decorative elements (molecules, light streams, color particles) */
        .cover-backdrop::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: radial-gradient(circle at 20% 30%, rgba(227, 139, 111, 0.15) 2%, transparent 2.5%),
                              radial-gradient(circle at 80% 70%, rgba(227, 139, 111, 0.12) 1.8%, transparent 2.2%);
            background-size: 50px 50px, 40px 40px;
            pointer-events: none;
        }

        /* Molecular structure + chemical beaker abstraction (pure CSS) */
        .abstract-science {
            position: absolute;
            right: 5%;
            bottom: 8%;
            width: 180px;
            height: 180px;
            opacity: 0.6;
            pointer-events: none;
        }

        .mol-1, .mol-2, .mol-3 {
            position: absolute;
            background: rgba(255, 200, 180, 0.7);
            border-radius: 50%;
            filter: blur(3px);
        }

        .mol-1 { width: 60px; height: 60px; top: 20px; left: 20px; background: #E38B6F; opacity: 0.4; }
        .mol-2 { width: 40px; height: 40px; bottom: 40px; right: 30px; background: #F4A261; opacity: 0.5; }
        .mol-3 { width: 28px; height: 28px; top: 70px; right: 80px; background: #FFD966; opacity: 0.6; }
        
        .line-bonds {
            position: absolute;
            width: 100%;
            height: 100%;
            border: 1px solid rgba(227, 139, 111, 0.4);
            border-radius: 40% 60% 50% 50% / 40% 50% 60% 50%;
            top: 0;
            left: 0;
            transform: rotate(15deg);
        }

        /* Left text section */
        .cover-text {
            flex: 1.2;
            min-width: 260px;
            position: relative;
            z-index: 2;
        }

        .cover-badge {
            display: inline-block;
            background: rgba(227, 139, 111, 0.2);
            backdrop-filter: blur(4px);
            padding: 0.3rem 1rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: #FADDCB;
            border: 1px solid rgba(227, 139, 111, 0.5);
            margin-bottom: 1rem;
        }

        .cover-text h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            background: linear-gradient(130deg, #FFFFFF 0%, #FCE2D4 40%, #FFB085 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 1rem;
        }

        .cover-subhead {
            font-size: 1rem;
            color: #D9D0C6;
            max-width: 90%;
            border-left: 3px solid #E38B6F;
            padding-left: 1rem;
            margin: 1rem 0 1.5rem 0;
            line-height: 1.5;
        }

        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin-top: 1.2rem;
        }

        .tag {
            background: rgba(255,255,245,0.08);
            backdrop-filter: blur(4px);
            padding: 0.3rem 0.9rem;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 500;
            color: #F3E1D5;
            border: 0.5px solid rgba(227, 139, 111, 0.5);
        }

        /* Right visual area (color swatches + dye brush) */
        .cover-visual {
            flex: 0.8;
            min-width: 240px;
            background: rgba(255, 245, 235, 0.05);
            backdrop-filter: blur(8px);
            border-radius: 28px;
            padding: 1.2rem 1rem;
            border: 1px solid rgba(227, 139, 111, 0.4);
            box-shadow: 0 8px 20px rgba(0,0,0,0.2);
            position: relative;
            z-index: 2;
        }

        .color-palette {
            display: flex;
            justify-content: space-between;
            gap: 8px;
            margin-bottom: 1.2rem;
        }

        .color-chip {
            flex: 1;
            height: 60px;
            border-radius: 16px;
            transition: transform 0.2s;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
        }

        .color-chip:hover { transform: translateY(-3px); }

        .chip-1 { background: linear-gradient(145deg, #1E1B1A, #2A241F); }  /* Black */
        .chip-2 { background: linear-gradient(145deg, #6B3A2A, #9C5942); }  /* Reddish brown */
        .chip-3 { background: linear-gradient(145deg, #A76E3E, #D19C5B); }  /* Copper gold */
        .chip-4 { background: linear-gradient(145deg, #C5A059, #EAC48A); }  /* Linen blonde */

        .brush-area {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: rgba(0,0,0,0.3);
            padding: 10px 12px;
            border-radius: 80px;
            margin-top: 8px;
        }

        .brush-icon {
            background: #CF7C5A;
            width: 40px;
            height: 40px;
            border-radius: 40px;
            position: relative;
            box-shadow: 0 2px 8px rgba(0,0,0,0.2);
        }
        .brush-icon::before {
            content: "";
            position: absolute;
            width: 20px;
            height: 8px;
            background: #8B5A42;
            bottom: -8px;
            left: 10px;
            border-radius: 4px;
        }
        .brush-icon::after {
            content: "";
            position: absolute;
            width: 32px;
            height: 4px;
            background: #F3C5A8;
            bottom: -4px;
            left: 4px;
            border-radius: 2px;
        }
        .mix-text {
            font-size: 0.8rem;
            font-weight: 500;
            color: #FFE4D6;
            letter-spacing: 0.3px;
        }
        .ratio-badge {
            background: #E38B6F;
            color: #0F1A24;
            padding: 4px 12px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.8rem;
        }

        /* Responsive */
        @media (max-width: 780px) {
            .cover-backdrop {
                flex-direction: column;
                text-align: center;
                padding: 2rem 1.5rem;
            }
            .cover-subhead {
                max-width: 100%;
                text-align: left;
            }
            .cover-text h1 {
                font-size: 1.9rem;
            }
            .abstract-science {
                display: none;
            }
            .cover-visual {
                width: 100%;
            }
        }

        /* Hair shade strip */
        .hair-swatch-strip {
            margin-top: 18px;
            display: flex;
            height: 8px;
            border-radius: 10px;
            overflow: hidden;
        }
        .swatch-segment { flex: 1; }
        .s1 { background: #2F241F; }
        .s2 { background: #874E34; }
        .s3 { background: #C68253; }
        .s4 { background: #E7B27A; }
        .s5 { background: #F3D9A4; }

        .caption-micro {
            font-size: 0.7rem;
            text-align: right;
            color: #CBAF9E;
            margin-top: 8px;
        }