.avatar-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #673ab7;
    color: white;
    font-weight: bold;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 5px rgba(0,0,0,0.3);
    font-family: Arial, sans-serif;
    cursor: default;
}

body {
    margin: 0;
    background-color: #d50e0e;
    font-family: Arial, sans-serif;
}

.logo {
    position: absolute;
    top: 25px;
    left: 40px;
    z-index: 21;
}

    .logo img {
        height: 200px;
    }

/* ✅ NÚT ĐĂNG NHẬP / TÊN NGƯỜI DÙNG */
.auth-buttons {
    position: absolute;
    top: 20px;
    right: 30px;
    z-index: 22;
    display: flex;
    gap: 12px;
    align-items: center;
}

    .auth-buttons a {
        font-family: 'Amazon Ember', sans-serif;
        font-weight: bold;
        background-color: #0073b1;
        color: white;
        padding: 10px 16px;
        border-radius: 6px;
        text-decoration: none;
        position: relative;
        overflow: hidden;
    }

        .auth-buttons a::after {
            content: "";
            position: absolute;
            top: 3px;
            left: 3px;
            right: 3px;
            bottom: 3px;
            background-color: rgba(255, 255, 255, 0.3);
            border-radius: 4px;
            z-index: -1;
        }

        .auth-buttons a:hover {
            background-color: #005f91;
        }

    .auth-buttons span {
        color: white;
        font-weight: bold;
        font-size: 16px;
    }

.bottom-nav {
    position: absolute;
    bottom: 20px;
    left: 30px;
    z-index: 20;
    display: flex;
    gap: 20px;
    font-family: "Times New Roman", serif;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 10px 20px;
    border-radius: 8px;
}

    .bottom-nav a {
        text-decoration: none;
        font-weight: bold;
        color: #004085;
        padding: 6px 10px;
        border-radius: 5px;
    }

        .bottom-nav a:hover {
            background-color: #17a2b8;
            color: white;
        }

.banner-slider {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
}

    .banner-slider .slides {
        position: relative;
        width: 100%;
        height: 100%;
    }

    .banner-slider .slide {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        opacity: 0;
        transition: opacity 1s ease-in-out;
    }

        .banner-slider .slide.active {
            opacity: 1;
        }

    .banner-slider .prev,
    .banner-slider .next {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        background-color: rgba(0, 0, 0, 0.4);
        color: white;
        border: none;
        font-size: 28px;
        padding: 10px 15px;
        cursor: pointer;
        border-radius: 4px;
        z-index: 10;
    }

    .banner-slider .prev {
        left: 15px;
    }

    .banner-slider .next {
        right: 15px;
    }

        .banner-slider .prev:hover,
        .banner-slider .next:hover {
            background-color: rgba(0, 0, 0, 0.7);
        }

.container {
    padding: 30px;
}

.main-footer {
    background: linear-gradient(145deg, #0b2c47, #1c4966);
    color: #f0f0f0;
    padding: 50px 20px 20px;
    font-family: 'Segoe UI', sans-serif;
}

.footer-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 1200px;
    margin: auto;
    gap: 30px;
}

.footer-column {
    flex: 1;
    min-width: 260px;
}

    .footer-column h4 {
        font-size: 20px;
        margin-bottom: 15px;
        border-left: 4px solid #f39c12;
        padding-left: 10px;
        color: #f1c40f;
    }

    .footer-column p,
    .footer-column li {
        font-size: 15px;
        line-height: 1.6;
        color: #e0e0e0;
    }

    .footer-column ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }

.footer-bottom {
    text-align: center;
    font-size: 14px;
    padding-top: 20px;
    border-top: 1px solid #666;
    color: #aaa;
    margin-top: 30px;
}

p.layout {
    font-size: 16px;
    color: #f0f0f0;
}

.body {
    margin: 0; /* xoá margin mặc định */
    padding: 0;
    font-family: 'Times New Roman', serif;
    font-size: 20px;
    height: 100vh;
}

.form-control {
    width: 100%;
}

h2 {
    color: #000000;
    border-bottom: 2px solid #3498db;
    padding-bottom: 5px;
    margin-top: 40px;
    background-color: rgba(255, 255, 255, 0.7);
    padding: 10px;
}

p.hl {
    font-size: 20px;
    font-weight: bold;
    display: inline-block;
    margin: 10px 0 15px 0;
    background-color: rgba(255, 255, 255, 0.5);
    padding: 8px 16px;
    border: 2px dashed #3498db;
    border-radius: 6px;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
}


table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 30px;
    background-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

th, td {
    border: 1px solid #ccc;
    padding: 10px 14px;
    text-align: left;
}

th {
    background-color: rgba(52, 152, 219, 0.5);
    color: white;
}

td {
    background-color: rgba(255, 255, 255, 0.8);
}

a {
    color: blue;
    text-decoration: none;
}

    a:hover {
        text-decoration: underline;
        color: #1a5276;
    }

.banner-welcome {
    position: absolute;
    top: 30px;
    left: 45%;
    transform: translateX(-45%);
    z-index: 11;
    color: white;
    font-size: 45px;
    font-weight: bold;
    font-style: italic;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
    font-family: 'Segoe UI', sans-serif;
}

.xemthem-button {
    position: absolute;
    top: 100px;
    left: 45%;
    transform: translateX(-45%);
    z-index: 11;
    background-color: #ffc200b7;
    border: none;
    padding: 12px 26px;
    font-size: 20px;
    border-radius: 8px;
    font-weight: bold;
    font-style: italic;
    cursor: pointer;
}

.gioithieu-box {
    display: none;
    padding: 30px;
    background-color: rgba(255,255,255,0.95);
    margin: 20px auto;
    max-width: 900px;
    border-radius: 12px;
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
    font-size: 18px;
    font-style: italic;
    line-height: 1.6;
}