/* Tổng thể */
body {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* Thẻ chính */
.card {
    transition: transform 0.2s ease;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    border: none;
    overflow: hidden;
}

    .card:hover {
        transform: translateY(-2px);
    }

/* Nội dung văn bản */
.fs-custom {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    line-height: 1.8;
    text-align: center;
    padding: 1.5rem 1rem;
    word-break: break-word;
}

/* Nút bấm - lớn hơn cho dễ bấm trên điện thoại */
.btn {
    border-radius: 10px;
    padding: 0.75rem 1.5rem;
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    font-weight: 500;
    border: none;
    transition: all 0.2s ease;
}

.btn-lg {
    padding: 0.9rem 2rem;
}

.btn-primary {
    background-color: #2980b9;
}

    .btn-primary:hover {
        background-color: #2471a3;
        transform: scale(1.02);
    }

.btn-warning {
    background-color: #e67e22;
    color: white;
}

    .btn-warning:hover {
        background-color: #d35400;
        color: white;
    }

.btn-success {
    background-color: #27ae60;
}

    .btn-success:hover {
        background-color: #229954;
    }

/* Danh sách */
.list-group-item {
    font-size: clamp(0.95rem, 2vw, 1rem);
    padding: 1rem;
    word-break: break-word;
    border-left: none;
    border-right: none;
}

/* Form */
.form-control {
    border-radius: 10px;
    padding: 0.85rem 1rem;
    font-size: 1rem;
    border: 1px solid #ced4da;
}

    .form-control:focus {
        border-color: #2980b9;
        box-shadow: 0 0 0 0.2rem rgba(41, 128, 185, 0.25);
    }

/* Chân trang */
footer {
    margin-top: auto;
    border-top: 3px solid #27ae60;
}

    footer svg {
        transition: transform 0.25s ease;
    }

        footer svg:hover {
            transform: scale(1.08);
        }

    footer a {
        transition: color 0.2s ease;
    }

        footer a:hover {
            color: #f1c40f !important;
        }

/* Phân trang */
.pagination .page-link {
    border-radius: 8px;
    margin: 0 3px;
    padding: 0.5rem 0.85rem;
}

/* Tối ưu cho màn hình rất nhỏ */
@media (max-width: 576px) {
    .card-header h2 {
        font-size: 1.3rem;
    }

    .btn-group {
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
    }

    .btn {
        width: 100%;
    }
}