:root {
            --primary-orange: #ff9100;
            --accent-yellow: #ffd600;
            --dark-bg: #1a1a1a;
            --card-bg: #262626;
        }

        body, html {
            height: 100%;
            margin: 0;
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background-color: #fdfce9;
            color: white;
            scroll-behavior: smooth;
        }

        .hero-section {
           min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 60px 0;
        }

        .calculator-card {
            background: var(--card-bg);
            border-radius: 24px;
            padding: 40px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            box-shadow: 0 20px 50px rgba(0,0,0,0.8);
        }

        .title-text {
            color: var(--primary-orange);
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 5px;
        }

        .subtitle-text {
            color: #ddd;
            margin-bottom: 35px;
            font-weight: 300;
        }

        .form-control, .form-select {
            background-color: #fff;
            border: 2px solid transparent;
            height: 52px;
            border-radius: 12px;
            color: #1a1a1a;
            font-weight: 600;
        }

        .form-control:focus, .form-select:focus {
            border-color: var(--primary-orange);
            box-shadow: none;
        }

        label {
            color: #bbb;
            margin-bottom: 8px;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
        }

        .btn-calculate {
            background: linear-gradient(45deg, var(--primary-orange), var(--accent-yellow));
            color: #000;
            font-weight: 800;
            text-transform: uppercase;
            padding: 16px;
            border: none;
            border-radius: 12px;
            transition: all 0.3s ease;
            margin-top: 15px;
            font-size: 1.1rem;
        }

        .btn-calculate:hover {
            transform: scale(1.02);
            box-shadow: 0 0 20px rgba(255, 145, 0, 0.4);
        }

        .btn-calculate:disabled {
            background: #555;
            color: #888;
            transform: none;
        }

        #resultContainer {
            display: none;
            margin-top: 40px;
            animation: fadeIn 0.8s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .result-card {
            background: #2a2a2a;
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid rgba(255, 145, 0, 0.2);
        }

        .bmi-display-box {
            background: #222;
            padding: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            border-right: 1px solid rgba(255, 255, 255, 0.05);
        }

        .bmi-circle {
            width: 160px;
            height: 160px;
            border: 8px solid var(--primary-orange);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3.5rem;
            font-weight: 900;
            color: var(--primary-orange);
            margin-bottom: 20px;
            box-shadow: 0 0 30px rgba(255, 145, 0, 0.1);
        }

        .diet-plan-box {
            padding: 40px;
        }

        .plan-header {
            color: var(--accent-yellow);
            font-weight: 800;
            margin-bottom: 25px;
            text-transform: uppercase;
            font-size: 1.4rem;
        }

        .suggestion-item {
            background: rgba(255, 255, 255, 0.03);
            padding: 12px 18px;
            border-radius: 10px;
            margin-bottom: 10px;
            border-left: 4px solid var(--primary-orange);
            font-weight: 500;
            color: #eee;
            font-size: 0.95rem;
            line-height: 1.4;
        }

        .meal-card {
            background: rgba(0,0,0,0.2);
            border-radius: 15px;
            padding: 15px;
            margin-top: 20px;
            border: 1px solid rgba(255,255,255,0.05);
        }

        .meal-img {
            width: 100%;
            height: 120px;
            object-fit: cover;
            border-radius: 10px;
            margin-bottom: 10px;
        }

        .expert-section {
            margin-top: 40px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .expert-title {
            color: var(--accent-yellow);
            text-transform: uppercase;
            font-weight: 800;
            margin-bottom: 25px;
            text-align: center;
        }

        .expert-card {
            background: #333;
            border-radius: 15px;
            padding: 20px;
            text-align: center;
            transition: 0.3s;
        }

        .expert-card:hover {
            transform: translateY(-5px);
            background: #3d3d3d;
        }

        .expert-img {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            margin-bottom: 15px;
            border: 2px solid var(--primary-orange);
            object-fit: cover;
        }

        .expert-name {
            font-weight: 700;
            margin-bottom: 5px;
            color: white;
        }

        .expert-specialty {
            color: var(--primary-orange);
            font-size: 0.85rem;
            font-weight: 600;
        }

        #loadingIndicator {
            display: none;
            color: var(--accent-yellow);
            font-weight: bold;
            margin-top: 15px;
        }

        @media (max-width: 768px) {
            .bmi-display-box { border-right: none; border-bottom: 1px solid #444; }
        }