:root {
    --hong-sen: #FF85A2;      /* Màu cánh Sen và Sếu đầu đỏ */
    --xanh-tram: #1B5E20;     /* Xanh đậm rừng tràm Tam Nông */
    --do-tet: #E53935;        /* Đỏ rực rỡ may mắn */
    --vang-mai: #FFD600;      /* Vàng rực hoa mai */
    --nen-hong: #FFF0F3;      /* Nền hồng cực nhạt cho dịu mắt */
    
    /* Gradient tổ hợp cho chữ */
    --gradient-chu: linear-gradient(to right, #E53935, #FF85A2, #FFD600);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', sans-serif; }
body { background-color: var(--nen-hong); color: #333; line-height: 1.6; }

/* Menu linh hoạt */
nav { 
    background: var(--xanh-tram); 
    padding: 15px; 
    position: sticky; 
    top: 0; 
    z-index: 1000; 
    text-align: center;
    border-bottom: 4px solid var(--hong-sen);
}
nav a { 
    color: white; 
    text-decoration: none; 
    padding: 10px 18px; 
    font-weight: bold; 
    transition: 0.3s;
    font-size: 0.9rem;
}
nav a:hover { color: var(--vang-mai); background: rgba(255,255,255,0.1); border-radius: 10px; }

/* Header & Banner */
header { 
    background: linear-gradient(rgba(27, 94, 32, 0.8), rgba(255, 133, 162, 0.7)), 
                url('https://images.unsplash.com/photo-1599708141656-724bc9881273?auto=format&fit=crop&w=1000&q=80') center/cover;
    color: white; 
    text-align: center; 
    padding: 80px 20px; 
    border-bottom: 6px solid var(--vang-mai);
}

/* THÊM GRADIENT CHO H1 */
header h1 { 
    font-size: 3rem; 
    text-transform: uppercase; 
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    background: linear-gradient(to bottom, #FFD600, #FFFFFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Nội dung chính */
.container { 
    max-width: 1000px; 
    margin: 40px auto; 
    padding: 30px; 
    background: white; 
    border-radius: 25px; 
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    border-top: 8px solid var(--hong-sen);
}

/* THÊM GRADIENT CHO H2 */
h2 { 
    background: var(--gradient-chu);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    border-left: 5px solid var(--xanh-tram); 
    padding-left: 15px; 
    margin-bottom: 25px; 
    display: inline-block; /* Để gradient ôm sát chữ */
    font-size: 2rem;
}

/* THÊM CLASS ĐỂ BẠN DÙNG TRONG TEXT BẤT KỲ */
.text-gradient {
    background: var(--gradient-chu);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: bold;
}

/* Grid cho các trang danh sách */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.card { 
    border: 2px solid var(--nen-hong); 
    padding: 20px; 
    border-radius: 20px; 
    background: #fff; 
    text-align: center;
    transition: 0.3s;
}
.card:hover { border-color: var(--hong-sen); transform: translateY(-5px); box-shadow: 0 5px 15px rgba(255, 133, 162, 0.3); }
.card img { width: 100%; height: 180px; object-fit: cover; border-radius: 15px; margin-bottom: 15px; }

/* Form & Map */
input, textarea { width: 100%; padding: 12px; margin: 10px 0; border: 2px solid var(--nen-hong); border-radius: 10px; }
button { background: var(--do-tet); color: white; padding: 12px 30px; border: none; border-radius: 25px; font-weight: bold; cursor: pointer; }
button:hover { background: var(--vang-mai); color: var(--do-tet); }

footer { background: var(--xanh-tram); color: white; text-align: center; padding: 40px; margin-top: 60px; }