:root {
            /* Deep Dark Mode (Default) */
            --bg: #020617;
            --card-bg: rgba(15, 23, 42, 0.8);
            --text-main: #f8fafc;
            --text-dim: #94a3b8;
            --intel-blue: #0071C5;
            --glow: #38bdf8;
            --border: rgba(255, 255, 255, 0.08);
            --danger: #ef4444;
            --success: #22c55e;
            --gradient: linear-gradient(135deg, #0071C5 0%, #38bdf8 100%);
        }

        body.light-mode {
            --bg: #f8fafc;
            --card-bg: #ffffff;
            --text-main: #0f172a;
            --text-dim: #64748b;
            --border: rgba(0, 0, 0, 0.08);
            --glow: #0071C5;
        }

        * {
            margin: 0; padding: 0; box-sizing: border-box;
            font-family: 'Plus Jakarta Sans', sans-serif;
            -webkit-tap-highlight-color: transparent;
        }

        html { scroll-behavior: smooth; }

        body {
            background-color: var(--bg);
            color: var(--text-main);
            transition: background 0.4s ease, color 0.4s ease;
            overflow-x: hidden;
            line-height: 1.6;
        }

        /* --- Navbar --- */
        nav {
            position: fixed; top: 0; width: 100%; padding: 15px 5%;
            display: flex; justify-content: space-between; align-items: center;
            z-index: 1000; backdrop-filter: blur(15px);
            border-bottom: 1px solid var(--border);
        }

        .logo { 
            font-family: 'Space Grotesk', sans-serif; 
            font-weight: 700; font-size: 1.4rem; 
            display: flex; align-items: center; gap: 8px;
        }
        .logo i { color: var(--intel-blue); }
        .logo span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

        .theme-toggle {
            background: var(--card-bg); border: 1px solid var(--border);
            color: var(--text-main); padding: 10px 18px; border-radius: 50px;
            cursor: pointer; font-size: 0.9rem; display: flex; align-items: center; gap: 10px;
            transition: 0.3s; box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }

        /* --- Hero Section --- */
        header {
            min-height: 100vh; display: flex; flex-direction: column;
            justify-content: center; align-items: center; text-align: center;
            padding: 100px 8% 50px; position: relative;
        }

        .hero-badge {
            background: rgba(0, 113, 197, 0.1); color: var(--intel-blue);
            padding: 8px 16px; border-radius: 50px; font-size: 0.8rem;
            font-weight: 700; margin-bottom: 24px; border: 1px solid rgba(0, 113, 197, 0.2);
        }

        h1 {
            font-size: clamp(2.2rem, 8vw, 4.5rem); line-height: 1.1; margin-bottom: 24px;
            font-family: 'Space Grotesk', sans-serif; font-weight: 700;
        }

        header p { max-width: 650px; color: var(--text-dim); font-size: 1.1rem; margin-bottom: 40px; }

        .btn-cta {
            background: var(--gradient); color: white; padding: 18px 45px;
            border-radius: 14px; text-decoration: none; font-weight: 700;
            box-shadow: 0 20px 40px rgba(0, 113, 197, 0.3); transition: 0.3s;
        }
        .btn-cta:hover { transform: translateY(-3px); box-shadow: 0 25px 50px rgba(0, 113, 197, 0.5); }

        /* --- Bento Grid Benefits --- */
        .section { padding: 80px 8%; }
        .bento-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px;
        }
        .bento-card {
            background: var(--card-bg); border: 1px solid var(--border);
            padding: 35px; border-radius: 28px; transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }
        .bento-card:hover { transform: translateY(-10px); border-color: var(--glow); }
        .bento-card i { font-size: 2.2rem; color: var(--glow); margin-bottom: 20px; }
        .bento-card h3 { margin-bottom: 12px; font-size: 1.3rem; }

        /* --- Interactive Scanner --- */
        .scanner-container {
            max-width: 800px; margin: 40px auto; background: var(--card-bg);
            border-radius: 35px; padding: 40px; border: 1px solid var(--border);
            box-shadow: 0 40px 80px rgba(0,0,0,0.3); position: relative;
        }

        .drop-zone {
            width: 100%; height: 320px; border: 2px dashed var(--border);
            border-radius: 24px; display: flex; flex-direction: column;
            justify-content: center; align-items: center; cursor: pointer;
            transition: 0.3s; position: relative; overflow: hidden;
        }
        .drop-zone:hover { background: rgba(56, 189, 248, 0.05); border-color: var(--glow); }

        .scan-anim-line {
            position: absolute; top: 0; left: 0; width: 100%; height: 4px;
            background: var(--glow); box-shadow: 0 0 20px var(--glow);
            z-index: 10; display: none; animation: scanMove 2s infinite linear;
        }
        @keyframes scanMove { 0% { top: 0; } 100% { top: 100%; } }

        #analyze-btn {
            display: none; width: 100%; margin-top: 25px; background: var(--text-main);
            color: var(--bg); border: none; padding: 18px; border-radius: 12px;
            font-weight: 800; cursor: pointer; font-size: 1rem; transition: 0.3s;
        }

        /* --- Results Styling --- */
        #results-grid { margin-top: 40px; display: grid; gap: 20px; }
        .med-result-card {
            background: var(--card-bg); padding: 25px; border-radius: 20px;
            border: 1px solid var(--border); animation: fadeIn 0.6s ease-out forwards;
            border-left: 6px solid var(--glow);
        }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

        .safety-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(239, 68, 68, 0.1); color: var(--danger);
            padding: 8px 14px; border-radius: 8px; font-size: 0.85rem; font-weight: 600; margin-top: 15px;
        }

        /* --- Human Touch / Pharmacist Tip --- */
        .pharmacist-tip {
            margin-top: 60px; background: var(--gradient); color: white;
            padding: 30px; border-radius: 25px; display: flex; align-items: center;
            gap: 20px; flex-wrap: wrap; box-shadow: 0 20px 40px rgba(0,113,197,0.2);
        }
        .pharmacist-tip i { font-size: 2.5rem; }

        /* --- Responsive Adjustments --- */
        @media (max-width: 768px) {
            nav { padding: 15px 5%; }
            .theme-toggle span { display: none; }
            header { padding-top: 140px; }
            h1 { font-size: 2.4rem; }
            .scanner-container { padding: 20px; margin: 20px; }
            .drop-zone { height: 280px; }
            .bento-grid { grid-template-columns: 1fr; }
            .pharmacist-tip { text-align: center; justify-content: center; }
        }

        footer {
            padding: 60px 8%; text-align: center; border-top: 1px solid var(--border);
            color: var(--text-dim); font-size: 0.9rem;
        }