/* CRITICAL ULTRA-LEAN STYLESHEET (~4.2 KB) */
        :root {
            --bg: #0a0a0c;
            --surface: #121216;
            --surface-card: rgba(255, 255, 255, 0.03);
            --border: rgba(255, 255, 255, 0.08);
            --border-highlight: rgba(255, 255, 255, 0.18);
            --text-main: #f4f4f6;
            --text-muted: #a1a1aa;
            --accent-gold: #e2b872;
            --accent-glow: rgba(226, 184, 114, 0.12);
            --danger: #f43f5e;
            --success: #10b981;
            --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

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

        body {
            background-color: var(--bg);
            color: var(--text-main);
            font-family: var(--font);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        
        /* GLOBAL LINK RESET (PREVENTS PURPLE VISITED LINKS) */
        a, a:visited {
            color: inherit;
            text-decoration: none;
        }

        .container {
            width: min(100% - 3rem, 1140px);
            margin-inline: auto;
        }

        /* Nav Header */
        header {
            padding: 1.5rem 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            background: rgba(10, 10, 12, 0.85);
            backdrop-filter: blur(12px);
            z-index: 100;
        }

        .logo { font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; text-decoration: none; color: #fff; font-size: 0.95rem; }
        .logo span { color: var(--accent-gold); }

        /* Typography & Layout */
        .hero {
            padding: clamp(3.5rem, 8vw, 7rem) 0 4rem 0;
            max-width: 820px;
        }
        
        .hero-wide {
            padding: clamp(3.5rem, 8vw, 7rem) 0 4rem 0;
            margin-bottom:1em;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.35rem 0.85rem;
            border-radius: 9999px;
            background: var(--accent-glow);
            border: 1px solid rgba(226, 184, 114, 0.3);
            color: var(--accent-gold);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 1.5rem;
        }

        h1 {
            font-size: clamp(2.4rem, 4.5vw, 4.2rem);
            line-height: 1.08;
            letter-spacing: -0.03em;
            background: linear-gradient(180deg, #FFFFFF 0%, #D4D4D8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .subtitle {
            color: var(--text-muted);
            font-size: clamp(1.05rem, 1.8vw, 1.25rem);
            margin-top: 1.5rem;
            max-width: 65ch;
        }
        
        .subtitle-wide {
            color: var(--text-muted);
            font-size: clamp(1.05rem, 1.8vw, 1.25rem);
            margin-top: 1.5rem;
        }        

        /* Bento Grid Layout */
        .grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 480px), 1fr)); gap: 1.5rem; margin: 3rem 0; }
        .grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 1.5rem; margin: 3rem 0; }

        .card {
            background: var(--surface-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2.25rem;
            backdrop-filter: blur(8px);
        }

        .card.highlight {
            border-color: var(--border-highlight);
            background: linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.01) 100%);
        }

        .card-number {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-gold);
            letter-spacing: 0.1em;
            margin-bottom: 0.75rem;
        }

        h2.section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
        }

        .tag-bad { color: var(--danger); font-weight: 600; text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.05em; }
        .tag-good { color: var(--success); font-weight: 600; text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.05em; }

        /* Comparison Table */
        .comparison-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        @media (max-width: 640px) { .comparison-box { grid-template-columns: 1fr; } }

        /* Buttons & Forms */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.85rem 1.75rem;
            border-radius: 8px;
            background: var(--text-main);
            color: #000;
            font-weight: 600;
            text-decoration: none;
            transition: transform 0.2s, opacity 0.2s;
            border: none;
            cursor: pointer;
        }
        .btn:hover { opacity: 0.9; transform: translateY(-1px); }
        .btn-gold { background: var(--accent-gold); color: #000; }

        .cta-box {
            background: var(--surface);
            border: 1px solid var(--border-highlight);
            border-radius: 20px;
            padding: 3rem 2rem;
            text-align: center;
            margin: 5rem 0;
        }

        footer {
            border-top: 1px solid var(--border);
            padding: 2.5rem 0;
            color: var(--text-muted);
            font-size: 0.875rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }
        
/* EMERALD GREEN MENU BUTTONS */
.btn-emerald {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.1rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: #a7f3d0;
    background: #064e3b;
    border: 1px solid #059669;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.25s ease-in-out;
}

.btn-emerald:hover {
    background: #047857;
    color: #ffffff;
    border-color: #34d399;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.35);
    transform: translateY(-1px);
}

.btn-emerald.active {
    background: #059669;
    color: #ffffff;
    border-color: #6ee7b7;
    box-shadow: 0 0 10px rgba(52, 211, 153, 0.3);
}

/* SCIENTIFIC FORMULA & MATH STYLING */
.sci-math {
    font-family: 'Cambria Math', 'Times New Roman', serif;
    font-style: italic;
    color: var(--accent-gold);
    letter-spacing: 0.02em;
}

/* SCIENTIFIC FORMULA & TYPOGRAPHY STYLING */
.sci-val {
    font-weight: 600;
    color: var(--accent-gold);
}
.sci-chem {
    font-family: var(--font);
    font-weight: 600;
    letter-spacing: 0.03em;
}

/* DROPDOWN MENU FIX WITH INVISIBLE HOVER BRIDGE */
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 260px;
    background: #0d1210;
    border: 1px solid #059669;
    border-radius: 6px;
    padding: 0.4rem 0;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.8);
    z-index: 1000;
    margin-top: 0.3rem; /* Small visual gap */
}

/* THE HOVER BRIDGE: Fills the gap invisibly so mouse never loses focus */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    width: 100%;
    height: 10px;
}

.dropdown:hover .dropdown-menu {
    display: block !important;
}

.dropdown-item {
    display: block;
    padding: 0.65rem 1.1rem;
    color: #a7f3d0;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease;
    white-space: nowrap;
}

.dropdown-item:hover {
    background: #047857;
    color: #ffffff;
}

.dropdown-item.active {
    color: var(--accent-gold);
    font-weight: 700;
    background: rgba(226, 184, 114, 0.1);
}

.bold {
    font-weight: 700;  
}

.text-white {
    color:#ffffff;
}
}